David Howells [Wed, 5 Dec 2012 13:34:49 +0000 (13:34 +0000)]
FS-Cache: Add transition to handle invalidate immediately after lookup
Add a missing transition to the FS-Cache object state machine to handle an
invalidation event occuring between the back end completing the object lookup
by calling fscache_obtained_object() (which moves to state OBJECT_AVAILABLE)
and the backend returning to fscache_lookup_object() and thence to
fscache_object_state_machine() which then does a goto lookup_transit to handle
the transition - but lookup_transit doesn't handle EV_INVALIDATE.
Without this, the following BUG can be logged:
FS-Cache: Unsupported event 2 [5/f7] in state OBJECT_AVAILABLE
------------[ cut here ]------------
kernel BUG at fs/fscache/object.c:357!
Where event 2 is EV_INVALIDATE.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:49 +0000 (13:34 +0000)]
NFS: nfs_migrate_page() does not wait for FS-Cache to finish with a page
nfs_migrate_page() does not wait for FS-Cache to finish with a page, probably
leading to the following bad-page-state:
BUG: Bad page state in process python-bin pfn:17d39b
page:
ffffea00053649e8 flags:
004000000000100c count:0 mapcount:0 mapping:(null)
index:38686 (Tainted: G B ---------------- )
Pid: 31053, comm: python-bin Tainted: G B ----------------
2.6.32-71.24.1.el6.x86_64 #1
Call Trace:
[<
ffffffff8111bfe7>] bad_page+0x107/0x160
[<
ffffffff8111ee69>] free_hot_cold_page+0x1c9/0x220
[<
ffffffff8111ef19>] __pagevec_free+0x59/0xb0
[<
ffffffff8104b988>] ? flush_tlb_others_ipi+0x128/0x130
[<
ffffffff8112230c>] release_pages+0x21c/0x250
[<
ffffffff8115b92a>] ? remove_migration_pte+0x28a/0x2b0
[<
ffffffff8115f3f8>] ? mem_cgroup_get_reclaim_stat_from_page+0x18/0x70
[<
ffffffff81122687>] ____pagevec_lru_add+0x167/0x180
[<
ffffffff811226f8>] __lru_cache_add+0x58/0x70
[<
ffffffff81122731>] lru_cache_add_lru+0x21/0x40
[<
ffffffff81123f49>] putback_lru_page+0x69/0x100
[<
ffffffff8115c0bd>] migrate_pages+0x13d/0x5d0
[<
ffffffff81122687>] ? ____pagevec_lru_add+0x167/0x180
[<
ffffffff81152ab0>] ? compaction_alloc+0x0/0x370
[<
ffffffff8115255c>] compact_zone+0x4cc/0x600
[<
ffffffff8111cfac>] ? get_page_from_freelist+0x15c/0x820
[<
ffffffff810672f4>] ? check_preempt_wakeup+0x1c4/0x3c0
[<
ffffffff8115290e>] compact_zone_order+0x7e/0xb0
[<
ffffffff81152a49>] try_to_compact_pages+0x109/0x170
[<
ffffffff8111e94d>] __alloc_pages_nodemask+0x5ed/0x850
[<
ffffffff814c9136>] ? thread_return+0x4e/0x778
[<
ffffffff81150d43>] alloc_pages_vma+0x93/0x150
[<
ffffffff81167ea5>] do_huge_pmd_anonymous_page+0x135/0x340
[<
ffffffff814cb6f6>] ? rwsem_down_read_failed+0x26/0x30
[<
ffffffff81136755>] handle_mm_fault+0x245/0x2b0
[<
ffffffff814ce383>] do_page_fault+0x123/0x3a0
[<
ffffffff814cbdf5>] page_fault+0x25/0x30
nfs_migrate_page() calls nfs_fscache_release_page() which doesn't actually wait
- even if __GFP_WAIT is set. The reason that doesn't wait is that
fscache_maybe_release_page() might deadlock the allocator as the work threads
writing to the cache may all end up sleeping on memory allocation.
However, I wonder if that is actually a problem. There are a number of things
I can do to deal with this:
(1) Make nfs_migrate_page() wait.
(2) Make fscache_maybe_release_page() honour the __GFP_WAIT flag.
(3) Set a timeout around the wait.
(4) Make nfs_migrate_page() return an error if the page is still busy.
For the moment, I'll select (2) and (4).
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:48 +0000 (13:34 +0000)]
FS-Cache: Exclusive op submission can BUG if there's been an I/O error
The function to submit an exclusive op (fscache_submit_exclusive_op()) can BUG
if there's been an I/O error because it may see the parent cache object in an
unexpected state. It should only BUG if there hasn't been an I/O error.
In this case the problem was produced by remounting the cache partition to be
R/O. The EROFS state was detected and the cache was aborted, but not
everything handled the aborting correctly.
SysRq : Emergency Remount R/O
EXT4-fs (sda6): re-mounted. Opts: (null)
Emergency Remount complete
CacheFiles: I/O Error: Failed to update xattr with error -30
FS-Cache: Cache cachefiles stopped due to I/O error
------------[ cut here ]------------
kernel BUG at fs/fscache/operation.c:128!
invalid opcode: 0000 [#1] SMP
CPU 0
Modules linked in: cachefiles nfs fscache auth_rpcgss nfs_acl lockd sunrpc
Pid: 6612, comm: kworker/u:2 Not tainted 3.1.0-rc8-fsdevel+ #1093 /DG965RY
RIP: 0010:[<
ffffffffa00739c0>] [<
ffffffffa00739c0>] fscache_submit_exclusive_op+0x2ad/0x2c2 [fscache]
RSP: 0018:
ffff880000853d40 EFLAGS:
00010206
RAX:
ffff880038ac72a8 RBX:
ffff8800181f2260 RCX:
ffffffff81f2b2b0
RDX:
0000000000000001 RSI:
ffffffff8179a478 RDI:
ffff8800181f2280
RBP:
ffff880000853d60 R08:
0000000000000002 R09:
0000000000000000
R10:
0000000000000001 R11:
0000000000000001 R12:
ffff880038ac7268
R13:
ffff8800181f2280 R14:
ffff88003a359190 R15:
000000010122b162
FS:
0000000000000000(0000) GS:
ffff88003bc00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
00000034cc4a77f0 CR3:
0000000010e96000 CR4:
00000000000006f0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Process kworker/u:2 (pid: 6612, threadinfo
ffff880000852000, task
ffff880014c3c040)
Stack:
ffff8800181f2260 ffff8800181f2310 ffff880038ac7268 ffff8800181f2260
ffff880000853dc0 ffffffffa0072375 ffff880037ecfe00 ffff88003a359198
ffff880000853dc0 0000000000000246 0000000000000000 ffff88000a91d308
Call Trace:
[<
ffffffffa0072375>] fscache_object_work_func+0x792/0xe65 [fscache]
[<
ffffffff81047e44>] process_one_work+0x1eb/0x37f
[<
ffffffff81047de6>] ? process_one_work+0x18d/0x37f
[<
ffffffffa0071be3>] ? fscache_enqueue_dependents+0xd8/0xd8 [fscache]
[<
ffffffff810482e4>] worker_thread+0x15a/0x21a
[<
ffffffff8104818a>] ? rescuer_thread+0x188/0x188
[<
ffffffff8104bf96>] kthread+0x7f/0x87
[<
ffffffff813ad6f4>] kernel_thread_helper+0x4/0x10
[<
ffffffff81026b98>] ? finish_task_switch+0x45/0xc0
[<
ffffffff813abd1d>] ? retint_restore_args+0xe/0xe
[<
ffffffff8104bf17>] ? __init_kthread_worker+0x53/0x53
[<
ffffffff813ad6f0>] ? gs_change+0xb/0xb
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:48 +0000 (13:34 +0000)]
FS-Cache: Limit the number of I/O error reports for a cache
Limit the number of I/O error reports for a cache to 1 to prevent massive
amounts of noise. After the first I/O error the cache is taken off line
automatically, so must be restarted to resume caching.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:47 +0000 (13:34 +0000)]
FS-Cache: Don't mask off the object event mask when printing it
Don't mask off the object event mask when printing it. That way it can be seen
if threre are bits set that shouldn't be.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:46 +0000 (13:34 +0000)]
FS-Cache: Initialise the object event mask with the calculated mask
Initialise the object event mask with the calculated mask rather than unmasking
undefined events also.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:46 +0000 (13:34 +0000)]
FS-Cache: Convert the object event ID #defines into an enum
Convert the fscache_object event IDs from #defines into an enum. Also add an
extra label to the enum to carry the event count and redefine the event mask
in terms of that.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Wed, 5 Dec 2012 13:34:45 +0000 (13:34 +0000)]
CacheFiles: Add missing retrieval completions
CacheFiles is missing some calls to fscache_retrieval_complete() in the error
handling/collision paths of its reader functions.
This can be seen by the following assertion tripping in fscache_put_operation()
whereby the operation being destroyed is still in the in-progress state and has
not been cancelled or completed:
FS-Cache: Assertion failed
3 == 5 is false
------------[ cut here ]------------
kernel BUG at fs/fscache/operation.c:408!
invalid opcode: 0000 [#1] SMP
CPU 2
Modules linked in: xfs ioatdma dca loop joydev evdev
psmouse dcdbas pcspkr serio_raw i5000_edac edac_core i5k_amb shpchp
pci_hotplug sg sr_mod]
Pid: 8062, comm: httpd Not tainted 3.1.0-rc8 #1 Dell Inc. PowerEdge 1950/0DT097
RIP: 0010:[<
ffffffff81197b24>] [<
ffffffff81197b24>] fscache_put_operation+0x304/0x330
RSP: 0018:
ffff880062f739d8 EFLAGS:
00010296
RAX:
0000000000000025 RBX:
ffff8800c5122e84 RCX:
ffffffff81ddf040
RDX:
00000000ffffffff RSI:
0000000000000082 RDI:
ffffffff81ddef30
RBP:
ffff880062f739f8 R08:
0000000000000005 R09:
0000000000000000
R10:
0000000000000000 R11:
0000000000000003 R12:
ffff8800c5122e40
R13:
ffff880037a2cd20 R14:
ffff880087c7a058 R15:
ffff880087c7a000
FS:
00007f63dcf636e0(0000) GS:
ffff88022fc80000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
00007f0c0a91f000 CR3:
0000000062ec2000 CR4:
00000000000006e0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Process httpd (pid: 8062, threadinfo
ffff880062f72000, task
ffff880087e58000)
Stack:
ffff880062f73bf8 0000000000000000 ffff880062f73bf8 ffff880037a2cd20
ffff880062f73a68 ffffffff8119aa7e ffff88006540e000 ffff880062f73ad4
ffff88008e9a4308 ffff880037a2cd20 ffff880062f73a48 ffff8800c5122e40
Call Trace:
[<
ffffffff8119aa7e>] __fscache_read_or_alloc_pages+0x1fe/0x530
[<
ffffffff81250780>] __nfs_readpages_from_fscache+0x70/0x1c0
[<
ffffffff8123142a>] nfs_readpages+0xca/0x1e0
[<
ffffffff815f3c06>] ? rpc_do_put_task+0x36/0x50
[<
ffffffff8122755b>] ? alloc_nfs_open_context+0x4b/0x110
[<
ffffffff815ecd1a>] ? rpc_call_sync+0x5a/0x70
[<
ffffffff810e7e9a>] __do_page_cache_readahead+0x1ca/0x270
[<
ffffffff810e7f61>] ra_submit+0x21/0x30
[<
ffffffff810e818d>] ondemand_readahead+0x11d/0x250
[<
ffffffff810e83b6>] page_cache_sync_readahead+0x36/0x60
[<
ffffffff810dffa4>] generic_file_aio_read+0x454/0x770
[<
ffffffff81224ce1>] nfs_file_read+0xe1/0x130
[<
ffffffff81121bd9>] do_sync_read+0xd9/0x120
[<
ffffffff8114088f>] ? mntput+0x1f/0x40
[<
ffffffff811238cb>] ? fput+0x1cb/0x260
[<
ffffffff81122938>] vfs_read+0xc8/0x180
[<
ffffffff81122af5>] sys_read+0x55/0x90
Reported-by: Mark Moseley <moseleymark@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:38 +0000 (21:52 +0000)]
NFS: Use FS-Cache invalidation
Use the new FS-Cache invalidation facility from NFS to deal with foreign
changes being detected on the server rather than attempting to retire the old
cookie and get a new one.
The problem with the old method was that NFS did not wait for all outstanding
storage and retrieval ops on the cache to complete. There was no automatic
wait between the calls to ->readpages() and calls to invalidate_inode_pages2()
as the latter can only wait on locked pages that have been added to the
pagecache (which they haven't yet on entry to ->readpages()).
This was leading to oopses like the one below when an outstanding read got cut
off from its cookie by a premature release.
BUG: unable to handle kernel NULL pointer dereference at
00000000000000a8
IP: [<
ffffffffa0075118>] __fscache_read_or_alloc_pages+0x1dd/0x315 [fscache]
PGD
15889067 PUD
15890067 PMD 0
Oops: 0000 [#1] SMP
CPU 0
Modules linked in: cachefiles nfs fscache auth_rpcgss nfs_acl lockd sunrpc
Pid: 4544, comm: tar Not tainted 3.1.0-rc4-fsdevel+ #1064 /DG965RY
RIP: 0010:[<
ffffffffa0075118>] [<
ffffffffa0075118>] __fscache_read_or_alloc_pages+0x1dd/0x315 [fscache]
RSP: 0018:
ffff8800158799e8 EFLAGS:
00010246
RAX:
0000000000000000 RBX:
ffff8800070d41e0 RCX:
ffff8800083dc1b0
RDX:
0000000000000000 RSI:
ffff880015879960 RDI:
ffff88003e627b90
RBP:
ffff880015879a28 R08:
0000000000000002 R09:
0000000000000002
R10:
0000000000000001 R11:
ffff880015879950 R12:
ffff880015879aa4
R13:
0000000000000000 R14:
ffff8800083dc158 R15:
ffff880015879be8
FS:
00007f671e9d87c0(0000) GS:
ffff88003bc00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
00000000000000a8 CR3:
000000001587f000 CR4:
00000000000006f0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Process tar (pid: 4544, threadinfo
ffff880015878000, task
ffff880015875040)
Stack:
ffffffffa00b1759 ffff8800070dc158 ffff8800000213da ffff88002a286508
ffff880015879aa4 ffff880015879be8 0000000000000001 ffff88002a2866e8
ffff880015879a88 ffffffffa00b20be 00000000000200da ffff880015875040
Call Trace:
[<
ffffffffa00b1759>] ? nfs_fscache_wait_bit+0xd/0xd [nfs]
[<
ffffffffa00b20be>] __nfs_readpages_from_fscache+0x7e/0x13f [nfs]
[<
ffffffff81095fe7>] ? __alloc_pages_nodemask+0x156/0x662
[<
ffffffffa0098763>] nfs_readpages+0xee/0x187 [nfs]
[<
ffffffff81098a5e>] __do_page_cache_readahead+0x1be/0x267
[<
ffffffff81098942>] ? __do_page_cache_readahead+0xa2/0x267
[<
ffffffff81098d7b>] ra_submit+0x1c/0x20
[<
ffffffff8109900a>] ondemand_readahead+0x28b/0x29a
[<
ffffffff810990ce>] page_cache_sync_readahead+0x38/0x3a
[<
ffffffff81091d8a>] generic_file_aio_read+0x2ab/0x67e
[<
ffffffffa008cfbe>] nfs_file_read+0xa4/0xc9 [nfs]
[<
ffffffff810c22c4>] do_sync_read+0xba/0xfa
[<
ffffffff810a62c9>] ? might_fault+0x4e/0x9e
[<
ffffffff81177a47>] ? security_file_permission+0x7b/0x84
[<
ffffffff810c25dd>] ? rw_verify_area+0xab/0xc8
[<
ffffffff810c29a4>] vfs_read+0xaa/0x13a
[<
ffffffff810c2a79>] sys_read+0x45/0x6c
[<
ffffffff813ac37b>] system_call_fastpath+0x16/0x1b
Reported-by: Mark Moseley <moseleymark@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:36 +0000 (21:52 +0000)]
CacheFiles: Implement invalidation
Implement invalidation for CacheFiles. This is in two parts:
(1) Provide an invalidation method (which just truncates the backing file).
(2) Abort attempts to copy anything read from the backing file whilst
invalidation is in progress.
Question: CacheFiles uses truncation in a couple of places. It has been using
notify_change() rather than sys_truncate() or something similar. This means
it bypasses a bunch of checks and suchlike that it possibly should be making
(security, file locking, lease breaking, vfsmount write). Should it be using
vfs_truncate() as added by a preceding patch or should it use notify_write()
and assume that anyone poking around in the cache files on disk gets
everything they deserve?
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:36 +0000 (21:52 +0000)]
VFS: Make more complete truncate operation available to CacheFiles
Make a more complete truncate operation available to CacheFiles (including
security checks and suchlike) so that it can use this to clear invalidated
cache files.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
David Howells [Thu, 20 Dec 2012 21:52:36 +0000 (21:52 +0000)]
FS-Cache: Provide proper invalidation
Provide a proper invalidation method rather than relying on the netfs retiring
the cookie it has and getting a new one. The problem with this is that isn't
easy for the netfs to make sure that it has completed/cancelled all its
outstanding storage and retrieval operations on the cookie it is retiring.
Instead, have the cache provide an invalidation method that will cancel or wait
for all currently outstanding operations before invalidating the cache, and
will cause new operations to queue up behind that. Whilst invalidation is in
progress, some requests will be rejected until the cache can stack a barrier on
the operation queue to cause new operations to be deferred behind it.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:35 +0000 (21:52 +0000)]
FS-Cache: Fix operation state management and accounting
Fix the state management of internal fscache operations and the accounting of
what operations are in what states.
This is done by:
(1) Give struct fscache_operation a enum variable that directly represents the
state it's currently in, rather than spreading this knowledge over a bunch
of flags, who's processing the operation at the moment and whether it is
queued or not.
This makes it easier to write assertions to check the state at various
points and to prevent invalid state transitions.
(2) Add an 'operation complete' state and supply a function to indicate the
completion of an operation (fscache_op_complete()) and make things call
it. The final call to fscache_put_operation() can then check that an op
in the appropriate state (complete or cancelled).
(3) Adjust the use of object->n_ops, ->n_in_progress, ->n_exclusive to better
govern the state of an object:
(a) The ->n_ops is now the number of extant operations on the object
and is now decremented by fscache_put_operation() only.
(b) The ->n_in_progress is simply the number of objects that have been
taken off of the object's pending queue for the purposes of being
run. This is decremented by fscache_op_complete() only.
(c) The ->n_exclusive is the number of exclusive ops that have been
submitted and queued or are in progress. It is decremented by
fscache_op_complete() and by fscache_cancel_op().
fscache_put_operation() and fscache_operation_gc() now no longer try to
clean up ->n_exclusive and ->n_in_progress. That was leading to double
decrements against fscache_cancel_op().
fscache_cancel_op() now no longer decrements ->n_ops. That was leading to
double decrements against fscache_put_operation().
fscache_submit_exclusive_op() now decides whether it has to queue an op
based on ->n_in_progress being > 0 rather than ->n_ops > 0 as the latter
will persist in being true even after all preceding operations have been
cancelled or completed. Furthermore, if an object is active and there are
runnable ops against it, there must be at least one op running.
(4) Add a remaining-pages counter (n_pages) to struct fscache_retrieval and
provide a function to record completion of the pages as they complete.
When n_pages reaches 0, the operation is deemed to be complete and
fscache_op_complete() is called.
Add calls to fscache_retrieval_complete() anywhere we've finished with a
page we've been given to read or allocate for. This includes places where
we just return pages to the netfs for reading from the server and where
accessing the cache fails and we discard the proposed netfs page.
The bugs in the unfixed state management manifest themselves as oopses like the
following where the operation completion gets out of sync with return of the
cookie by the netfs. This is possible because the cache unlocks and returns
all the netfs pages before recording its completion - which means that there's
nothing to stop the netfs discarding them and returning the cookie.
FS-Cache: Cookie 'NFS.fh' still has outstanding reads
------------[ cut here ]------------
kernel BUG at fs/fscache/cookie.c:519!
invalid opcode: 0000 [#1] SMP
CPU 1
Modules linked in: cachefiles nfs fscache auth_rpcgss nfs_acl lockd sunrpc
Pid: 400, comm: kswapd0 Not tainted 3.1.0-rc7-fsdevel+ #1090 /DG965RY
RIP: 0010:[<
ffffffffa007050a>] [<
ffffffffa007050a>] __fscache_relinquish_cookie+0x170/0x343 [fscache]
RSP: 0018:
ffff8800368cfb00 EFLAGS:
00010282
RAX:
000000000000003c RBX:
ffff880023cc8790 RCX:
0000000000000000
RDX:
0000000000002f2e RSI:
0000000000000001 RDI:
ffffffff813ab86c
RBP:
ffff8800368cfb50 R08:
0000000000000002 R09:
0000000000000000
R10:
ffff88003a1b7890 R11:
ffff88001df6e488 R12:
ffff880023d8ed98
R13:
ffff880023cc8798 R14:
0000000000000004 R15:
ffff88003b8bf370
FS:
0000000000000000(0000) GS:
ffff88003bd00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
00000000008ba008 CR3:
0000000023d93000 CR4:
00000000000006e0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Process kswapd0 (pid: 400, threadinfo
ffff8800368ce000, task
ffff88003b8bf040)
Stack:
ffff88003b8bf040 ffff88001df6e528 ffff88001df6e528 ffffffffa00b46b0
ffff88003b8bf040 ffff88001df6e488 ffff88001df6e620 ffffffffa00b46b0
ffff88001ebd04c8 0000000000000004 ffff8800368cfb70 ffffffffa00b2c91
Call Trace:
[<
ffffffffa00b2c91>] nfs_fscache_release_inode_cookie+0x3b/0x47 [nfs]
[<
ffffffffa008f25f>] nfs_clear_inode+0x3c/0x41 [nfs]
[<
ffffffffa0090df1>] nfs4_evict_inode+0x2f/0x33 [nfs]
[<
ffffffff810d8d47>] evict+0xa1/0x15c
[<
ffffffff810d8e2e>] dispose_list+0x2c/0x38
[<
ffffffff810d9ebd>] prune_icache_sb+0x28c/0x29b
[<
ffffffff810c56b7>] prune_super+0xd5/0x140
[<
ffffffff8109b615>] shrink_slab+0x102/0x1ab
[<
ffffffff8109d690>] balance_pgdat+0x2f2/0x595
[<
ffffffff8103e009>] ? process_timeout+0xb/0xb
[<
ffffffff8109dba3>] kswapd+0x270/0x289
[<
ffffffff8104c5ea>] ? __init_waitqueue_head+0x46/0x46
[<
ffffffff8109d933>] ? balance_pgdat+0x595/0x595
[<
ffffffff8104bf7a>] kthread+0x7f/0x87
[<
ffffffff813ad6b4>] kernel_thread_helper+0x4/0x10
[<
ffffffff81026b98>] ? finish_task_switch+0x45/0xc0
[<
ffffffff813abcdd>] ? retint_restore_args+0xe/0xe
[<
ffffffff8104befb>] ? __init_kthread_worker+0x53/0x53
[<
ffffffff813ad6b0>] ? gs_change+0xb/0xb
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:35 +0000 (21:52 +0000)]
FS-Cache: Make cookie relinquishment wait for outstanding reads
Make fscache_relinquish_cookie() log a warning and wait if there are any
outstanding reads left on the cookie it was given.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:34 +0000 (21:52 +0000)]
CacheFiles: Make some debugging statements conditional
Downgrade some debugging statements to not unconditionally print stuff, but
rather be conditional on the appropriate module parameter setting.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:33 +0000 (21:52 +0000)]
FS-Cache: Check that there are no read ops when cookie relinquished
Check that the netfs isn't trying to relinquish a cookie that still has read
operations in progress upon it. If there are, then give log a warning and BUG.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:33 +0000 (21:52 +0000)]
CacheFiles: Downgrade the requirements passed to the allocator
Downgrade the requirements passed to the allocator in the gfp flags parameter.
FS-Cache/CacheFiles can handle OOM conditions simply by aborting the attempt to
store an object or a page in the cache.
Signed-off-by: David Howells <dhowells@redhat.com>
David Howells [Thu, 20 Dec 2012 21:52:32 +0000 (21:52 +0000)]
CacheFiles: Fix the marking of cached pages
Under some circumstances CacheFiles defers the marking of pages with PG_fscache
so that it can take advantage of pagevecs to reduce the number of calls to
fscache_mark_pages_cached() and the netfs's hook to keep track of this.
There are, however, two problems with this:
(1) It can lead to the PG_fscache mark being applied _after_ the page is set
PG_uptodate and unlocked (by the call to fscache_end_io()).
(2) CacheFiles's ref on the page is dropped immediately following
fscache_end_io() - and so may not still be held when the mark is applied.
This can lead to the page being passed back to the allocator before the
mark is applied.
Fix this by, where appropriate, marking the page before calling
fscache_end_io() and releasing the page. This means that we can't take
advantage of pagevecs and have to make a separate call for each page to the
marking routines.
The symptoms of this are Bad Page state errors cropping up under memory
pressure, for example:
BUG: Bad page state in process tar pfn:002da
page:
ffffea0000009fb0 count:0 mapcount:0 mapping: (null) index:0x1447
page flags: 0x1000(private_2)
Pid: 4574, comm: tar Tainted: G W 3.1.0-rc4-fsdevel+ #1064
Call Trace:
[<
ffffffff8109583c>] ? dump_page+0xb9/0xbe
[<
ffffffff81095916>] bad_page+0xd5/0xea
[<
ffffffff81095d82>] get_page_from_freelist+0x35b/0x46a
[<
ffffffff810961f3>] __alloc_pages_nodemask+0x362/0x662
[<
ffffffff810989da>] __do_page_cache_readahead+0x13a/0x267
[<
ffffffff81098942>] ? __do_page_cache_readahead+0xa2/0x267
[<
ffffffff81098d7b>] ra_submit+0x1c/0x20
[<
ffffffff8109900a>] ondemand_readahead+0x28b/0x29a
[<
ffffffff81098ee2>] ? ondemand_readahead+0x163/0x29a
[<
ffffffff810990ce>] page_cache_sync_readahead+0x38/0x3a
[<
ffffffff81091d8a>] generic_file_aio_read+0x2ab/0x67e
[<
ffffffffa008cfbe>] nfs_file_read+0xa4/0xc9 [nfs]
[<
ffffffff810c22c4>] do_sync_read+0xba/0xfa
[<
ffffffff81177a47>] ? security_file_permission+0x7b/0x84
[<
ffffffff810c25dd>] ? rw_verify_area+0xab/0xc8
[<
ffffffff810c29a4>] vfs_read+0xaa/0x13a
[<
ffffffff810c2a79>] sys_read+0x45/0x6c
[<
ffffffff813ac37b>] system_call_fastpath+0x16/0x1b
As can be seen, PG_private_2 (== PG_fscache) is set in the page flags.
Instrumenting fscache_mark_pages_cached() to verify whether page->mapping was
set appropriately showed that sometimes it wasn't. This led to the discovery
that sometimes the page has apparently been reclaimed by the time the marker
got to see it.
Reported-by: M. Stevens <m@tippett.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Vaibhav Bedia [Wed, 19 Dec 2012 06:53:10 +0000 (06:53 +0000)]
ARM: OMAP: Fix build breakage due to missing include in i2c.c
Merge commit
752451f01c45 ("Merge branch 'i2c-embedded/for-next' of
git://git.pengutronix.de/git/wsa/linux") resulted in a build breakage
for OMAP
arch/arm/mach-omap2/i2c.c: In function 'omap_pm_set_max_mpu_wakeup_lat_compat':
arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of function 'omap_pm_set_max_mpu_wakeup_lat'
make[1]: *** [arch/arm/mach-omap2/i2c.o] Error 1
Fix this by including the appropriate header file with the function
prototype.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 20 Dec 2012 16:37:04 +0000 (08:37 -0800)]
Merge tag 'virtio-next-for-linus' of git://git./linux/kernel/git/rusty/linux
Pull virtio update from Rusty Russell:
"Some nice cleanups, and even a patch my wife did as a "live" demo for
Latinoware 2012.
There's a slightly non-trivial merge in virtio-net, as we cleaned up
the virtio add_buf interface while DaveM accepted the mq virtio-net
patches."
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (27 commits)
virtio_console: Add support for remoteproc serial
virtio_console: Merge struct buffer_token into struct port_buffer
virtio: add drv_to_virtio to make code clearly
virtio: use dev_to_virtio wrapper in virtio
virtio-mmio: Fix irq parsing in command line parameter
virtio_console: Free buffers from out-queue upon close
virtio: Convert dev_printk(KERN_<LEVEL> to dev_<level>(
virtio_console: Use kmalloc instead of kzalloc
virtio_console: Free buffer if splice fails
virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: scsi: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: rpmsg: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: net: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: console: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: make virtqueue_add_buf() returning 0 on success, not capacity.
virtio: console: don't rely on virtqueue_add_buf() returning capacity.
virtio_net: don't rely on virtqueue_add_buf() returning capacity.
virtio-net: remove unused skb_vnet_hdr->num_sg field
virtio-net: correct capacity math on ring full
virtio: move queue_index and num_free fields into core struct virtqueue.
...
Linus Torvalds [Thu, 20 Dec 2012 15:52:13 +0000 (07:52 -0800)]
Merge tag 'sound-3.8' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This update contains overall only driver-specific fixes. Slightly
large LOC are seen in usb-audio driver for a couple of new device
quirks and cs42l71 ASoC driver for enhanced features. The others are
a few small (regression) fixes HD-audio, and yet other small / trival
ASoC fixes."
* tag 'sound-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: usb-audio: Support for Digidesign Mbox 2 USB sound card:
ALSA: HDA: Fix sound resume hang
ALSA: hda - bug fix for invalid connection list of Haswell HDMI codec pins
ALSA: hda - Fix the wrong pincaps set in ALC861VD dallas/hp fixup
ALSA: hda - Set codec->single_adc_amp flag for Realtek codecs
ASoC: atmel-ssc: change disable to disable in dts node
ASoC: Prevent pop_wait overwrite
ALSA: usb-audio: ignore-quirk for HP Wireless Audio
ALSA: hda - Always turn on pins for HDMI/DP
ALSA: hda - Fix pin configuration of HP Pavilion dv7
ASoC: core: Fix splitting of log messages
ASoC: cs42l73: Change VSPIN/VSPOUT to VSPINOUT
ASoC: cs42l73: Add DAPM events for power down.
ASoC: cs42l73: Add DMIC's as DAPM inputs.
ASoC: sigmadsp: Fix endianness conversion issue
ASoC: tpa6130a2: Use devm_* APIs
Linus Torvalds [Thu, 20 Dec 2012 15:39:03 +0000 (07:39 -0800)]
Merge tag 'upstream-3.8-rc1' of git://git.infradead.org/linux-ubi
Pull UBI update from Artem Bityutskiy:
"Nothing exciting, just clean-ups and nicification. Oh, and one small
optimization which makes UBI to use less RAM."
* tag 'upstream-3.8-rc1' of git://git.infradead.org/linux-ubi:
UBI: embed ubi_debug_info field in ubi_device struct
UBI: introduce helpers dbg_chk_{io, gen}
UBI: replace memcpy with struct assignment
UBI: remove spurious comment
UBI: gluebi: rename misleading variables
UBI: do not allocate the memory unnecessarily
UBI: use list_move_tail instead of list_del/list_add_tail
Linus Torvalds [Thu, 20 Dec 2012 15:27:44 +0000 (07:27 -0800)]
Merge tags 'disintegrate-h8300-
20121219', 'disintegrate-m32r-
20121219' and 'disintegrate-score-
20121220' of git://git.infradead.org/users/dhowells/linux-headers
Pull UAPI disintegration for H8/300, M32R and Score from David Howells.
Scripted UAPI patches for architectures that apparently never reacted to
it on their own.
* tag 'disintegrate-h8300-
20121219' of git://git.infradead.org/users/dhowells/linux-headers:
UAPI: (Scripted) Disintegrate arch/h8300/include/asm
* tag 'disintegrate-m32r-
20121219' of git://git.infradead.org/users/dhowells/linux-headers:
UAPI: (Scripted) Disintegrate arch/m32r/include/asm
* tag 'disintegrate-score-
20121220' of git://git.infradead.org/users/dhowells/linux-headers:
UAPI: (Scripted) Disintegrate arch/score/include/asm
Linus Torvalds [Thu, 20 Dec 2012 15:24:17 +0000 (07:24 -0800)]
Merge tag 'cris-for-linus-3.8' of git://jni.nu/cris
Pull CRIS changes from Jesper Nilsson.
... mainly the UAPI disintegration.
* tag 'cris-for-linus-3.8' of git://jni.nu/cris:
UAPI: Fix up empty files in arch/cris/
CRIS: locking: fix the return value of arch_read_trylock()
CRIS: use kbuild.h instead of defining macros in asm-offset.c
UAPI: (Scripted) Disintegrate arch/cris/include/asm
UAPI: (Scripted) Disintegrate arch/cris/include/arch-v32/arch
UAPI: (Scripted) Disintegrate arch/cris/include/arch-v10/arch
Linus Torvalds [Thu, 20 Dec 2012 15:21:54 +0000 (07:21 -0800)]
Merge tag 'fixes' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"This is a batch of fixes for arm-soc platforms, most of it is for OMAP
but there are others too (i.MX, Tegra, ep93xx). Fixes warnings, some
broken platforms and drivers, etc. A bit all over the map really."
There was some concern about commit
68136b10 ("RM: sunxi: Change device
tree naming scheme for sunxi"), but Tony says:
"Looks like that's trivial to fix as needed, no need to rebuild the
branch to fix that AFAIK.
The fix can be done once Olof is available online again.
Linus, I suggest that you go ahead and pull this if there are no other
issues with this branch."
* tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
ARM: sunxi: Change device tree naming scheme for sunxi
ARM: ux500: fix missing include
ARM: u300: delete custom pin hog code
ARM: davinci: fix build break due to missing include
ARM: exynos: Fix warning due to missing 'inline' in stub
ARM: imx: Move platform-mx2-emma to arch/arm/mach-imx/devices
ARM i.MX51 clock: Fix regression since enabling MIPI/HSP clocks
ARM: dts: mx27: Fix the AIPI bus for FEC
ARM: OMAP2+: common: remove use of vram
ARM: OMAP3/4: cpuidle: fix sparse and checkpatch warnings
ARM: OMAP4: clock data: DPLLs are missing bypass clocks in their parent lists
ARM: OMAP4: clock data: div_iva_hs_clk is a power-of-two divider
ARM: OMAP4: Fix EMU clock domain always on
ARM: OMAP4460: Workaround ABE DPLL failing to turn-on
ARM: OMAP4: Enhance support for DPLLs with 4X multiplier
ARM: OMAP4: Add function table for non-M4X dplls
ARM: OMAP4: Update timer clock aliases
ARM: OMAP: Move plat/omap-serial.h to include/linux/platform_data/serial-omap.h
ARM: dts: Add build target for omap4-panda-a4
ARM: dts: OMAP2420: Correct H4 board memory size
...
Linus Torvalds [Thu, 20 Dec 2012 15:18:29 +0000 (07:18 -0800)]
Merge tag 'tag-for-linus-3.8' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf
Pull dma-buf updates from Sumit Semwal:
"A fairly small dma-buf pull request for 3.8 - only 2 patches"
* tag 'tag-for-linus-3.8' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf:
dma-buf: remove fallback for !CONFIG_DMA_SHARED_BUFFER
dma-buf: might_sleep() in dma_buf_unmap_attachment()
Linus Torvalds [Thu, 20 Dec 2012 15:07:18 +0000 (07:07 -0800)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging
Pull hwmon subsystem update from Jean Delvare:
"There are many improvements to the it87 driver, as well as suspend
support for the Winbond Super-I/O chips, and a few other fixes."
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
hwmon-vid: Add support for AMD family 11h to 15h processors
hwmon: (it87) Support PECI for additional chips
hwmon: (it87) Report thermal sensor type as Intel PECI if appropriate
hwmon: (it87) Manage device specific features with table
hwmon: (it87) Replace pwm group macro with direct attribute definitions
hwmon: (it87) Avoid quoted string splits across lines
hwmon: (it87) Save fan registers in 2-dimensional array
hwmon: (it87) Introduce support for tempX_offset sysfs attribute
hwmon: (it87) Replace macro defining tempX_type sensors with direct definitions
hwmon: (it87) Save voltage register values in 2-dimensional array
hwmon: (it87) Save temperature registers in 2-dimensional array
hwmon: (w83627ehf) Get rid of smatch warnings
hwmon: (w83627hf) Don't touch nonexistent I2C address registers
hwmon: (w83627ehf) Add support for suspend
hwmon: (w83627hf) Add support for suspend
hwmon: Fix PCI device reference leak in quirk
Hugh Dickins [Thu, 20 Dec 2012 01:44:29 +0000 (17:44 -0800)]
ksm: make rmap walks more scalable
The rmap walks in ksm.c are like those in rmap.c: they can safely be
done with anon_vma_lock_read().
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Thu, 20 Dec 2012 01:42:16 +0000 (17:42 -0800)]
sched: numa: ksm: fix oops in task_numa_placment()
task_numa_placement() oopsed on NULL p->mm when task_numa_fault() got
called in the handling of break_ksm() for ksmd. That might be a
peculiar case, which perhaps KSM could takes steps to avoid? but it's
more robust if task_numa_placement() allows for such a possibility.
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zlatko Calusic [Wed, 19 Dec 2012 23:25:13 +0000 (00:25 +0100)]
mm: do not sleep in balance_pgdat if there's no i/o congestion
On a 4GB RAM machine, where Normal zone is much smaller than DMA32 zone,
the Normal zone gets fragmented in time. This requires relatively more
pressure in balance_pgdat to get the zone above the required watermark.
Unfortunately, the congestion_wait() call in there slows it down for a
completely wrong reason, expecting that there's a lot of
writeback/swapout, even when there's none (much more common). After a
few days, when fragmentation progresses, this flawed logic translates to
a very high CPU iowait times, even though there's no I/O congestion at
all. If THP is enabled, the problem occurs sooner, but I was able to
see it even on !THP kernels, just by giving it a bit more time to occur.
The proper way to deal with this is to not wait, unless there's
congestion. Thanks to Mel Gorman, we already have the function that
perfectly fits the job. The patch was tested on a machine which nicely
revealed the problem after only 1 day of uptime, and it's been working
great.
Signed-off-by: Zlatko Calusic <zlatko.calusic@iskon.hr>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Mon, 22 Oct 2012 12:18:44 +0000 (14:18 +0200)]
UAPI: Fix up empty files in arch/cris/
Fix up three empty files in arch/cris/ by sticking placeholder comments in
there to prevent the patch program from deleting them.
I decided not to delete the arch-v*/Kbuild files as it's possibly someone might
want to use them for genhdr-y lines in the future, but they could be deleted
and the pointer lines removed from asm/Kbuild. The uapi/arch-v*/Kbuild files
ought to be uneffected by such a change.
asm/swab.h didn't have anything outside of __KERNEL__ so nothing appeared in
uapi/asm/swab.h. The latter, however, is exported by Kbuild.asm.
This needs to be applied after the CRIS UAPI disintegration patch.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Wei Yongjun [Wed, 17 Oct 2012 14:54:27 +0000 (16:54 +0200)]
CRIS: locking: fix the return value of arch_read_trylock()
arch_write_trylock() should return 'ret' instead of always
return 1.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Jesper Nilsson [Thu, 20 Dec 2012 11:48:53 +0000 (12:48 +0100)]
Merge tag 'disintegrate-cris-
20121009' of git://git.infradead.org/users/dhowells/linux-headers into for-linus2
UAPI Disintegration 2012-10-09
* tag 'disintegrate-cris-
20121009' of git://git.infradead.org/users/dhowells/linux-headers:
UAPI: (Scripted) Disintegrate arch/cris/include/asm
UAPI: (Scripted) Disintegrate arch/cris/include/arch-v32/arch
UAPI: (Scripted) Disintegrate arch/cris/include/arch-v10/arch
James Hogan [Thu, 11 Oct 2012 09:00:58 +0000 (11:00 +0200)]
CRIS: use kbuild.h instead of defining macros in asm-offset.c
This is modelled on commits such as the one below:
Commit
fc1c3a003edb8a6778e64e10ef671a38c76c969e ("sh: use kbuild.h
instead of defining macros in asm-offsets.c") introduced in v2.6.26.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
David Howells [Thu, 20 Dec 2012 10:53:58 +0000 (10:53 +0000)]
UAPI: (Scripted) Disintegrate arch/score/include/asm
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Acked-by: Lennox Wu <lennox.wu@gmail.com>
Acked-by: Liqin Chen <liqin299@gmail.com>
Maarten Lankhorst [Wed, 12 Dec 2012 09:23:03 +0000 (10:23 +0100)]
dma-buf: remove fallback for !CONFIG_DMA_SHARED_BUFFER
Documentation says that code requiring dma-buf should add it to
select, so inline fallbacks are not going to be used. A link error
will make it obvious what went wrong, instead of silently doing
nothing at runtime.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Rob Clark [Fri, 28 Sep 2012 07:29:43 +0000 (09:29 +0200)]
dma-buf: might_sleep() in dma_buf_unmap_attachment()
We never really clarified if unmap could be done in atomic context.
But since mapping might require sleeping, this implies mutex in use
to synchronize mapping/unmapping, so unmap could sleep as well. Add
a might_sleep() to clarify this.
Signed-off-by: Rob Clark <rob@ti.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Linus Torvalds [Thu, 20 Dec 2012 04:31:02 +0000 (20:31 -0800)]
Merge git://git./linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:
"Please pull to get these sparc AES/DES/CAMELLIA crypto bug fixes as
well as an addition of a pte_accessible() define for sparc64 and a
hugetlb fix from Dave Kleikamp."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in CAMELLIA code.
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in DES code.
sparc64: Fix ECB looping constructs in AES code.
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in AES code.
sparc64: Fix AES ctr mode block size.
sparc64: Fix unrolled AES 256-bit key loops.
sparc64: Define pte_accessible()
sparc: huge_ptep_set_* functions need to call set_huge_pte_at()
Linus Torvalds [Thu, 20 Dec 2012 04:29:15 +0000 (20:29 -0800)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) Really fix tuntap SKB use after free bug, from Eric Dumazet.
2) Adjust SKB data pointer to point past the transport header before
calling icmpv6_notify() so that the headers are in the state which
that function expects. From Duan Jiong.
3) Fix ambiguities in the new tuntap multi-queue APIs. From Jason
Wang.
4) mISDN needs to use del_timer_sync(), from Konstantin Khlebnikov.
5) Don't destroy mutex after freeing up device private in mac802154,
fix also from Konstantin Khlebnikov.
6) Fix INET request socket leak in TCP and DCCP, from Christoph Paasch.
7) SCTP HMAC kconfig rework, from Neil Horman.
8) Fix SCTP jprobes function signature, otherwise things explode, from
Daniel Borkmann.
9) Fix typo in ipv6-offload Makefile variable reference, from Simon
Arlott.
10) Don't fail USBNET open just because remote wakeup isn't supported,
from Oliver Neukum.
11) be2net driver bug fixes from Sathya Perla.
12) SOLOS PCI ATM driver bug fixes from Nathan Williams and David
Woodhouse.
13) Fix MTU changing regression in 8139cp driver, from John Greene.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (45 commits)
solos-pci: ensure all TX packets are aligned to 4 bytes
solos-pci: add firmware upgrade support for new models
solos-pci: remove superfluous debug output
solos-pci: add GPIO support for newer versions on Geos board
8139cp: Prevent dev_close/cp_interrupt race on MTU change
net: qmi_wwan: add ZTE MF880
drivers/net: Use of_match_ptr() macro in smsc911x.c
drivers/net: Use of_match_ptr() macro in smc91x.c
ipv6: addrconf.c: remove unnecessary "if"
bridge: Correctly encode addresses when dumping mdb entries
bridge: Do not unregister all PF_BRIDGE rtnl operations
use generic usbnet_manage_power()
usbnet: generic manage_power()
usbnet: handle PM failure gracefully
ksz884x: fix receive polling race condition
qlcnic: update driver version
qlcnic: fix unused variable warnings
net: fec: forbid FEC_PTP on SoCs that do not support
be2net: fix wrong frag_idx reported by RX CQ
be2net: fix be_close() to ensure all events are ack'ed
...
Linus Torvalds [Thu, 20 Dec 2012 04:26:16 +0000 (20:26 -0800)]
Merge tags 'dt-for-linus', 'gpio-for-linus' and 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull devicetree, gpio and spi bugfixes from Grant Likely:
"Device tree v3.8 bug fix:
- Fixes an undefined struct device build error and a missing symbol
export.
GPIO device driver bug fixes:
- gpio/mvebu-gpio: Make mvebu-gpio depend on OF_CONFIG
- gpio/ich: Add missing spinlock init
SPI device driver bug fixes:
- Most of this is bug fixes to the core code and the sh-hspi and
s3c64xx device drivers.
- There is also a patch here to add DT support to the Atmel driver.
This one should have been in the first round, but I missed it.
It's a low risk change contained within a single driver and the
Atmel maintainer has requested it."
* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6:
of: define struct device in of_platform.h if !OF_DEVICE and !OF_ADDRESS
of: Fix export of of_find_matching_node_and_match()
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6:
gpio/mvebu-gpio: Make mvebu-gpio depend on OF_CONFIG
gpio/ich: Add missing spinlock init
* tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6:
spi/sh-hspi: fix return value check in hspi_probe().
spi: fix tegra SPI binding examples
spi/atmel: add DT support
of/spi: Fix SPI module loading by using proper "spi:" modalias prefixes.
spi: Change FIFO flush operation and spi channel off
spi: Keep chipselect assertion during one message
Linus Torvalds [Thu, 20 Dec 2012 04:24:25 +0000 (20:24 -0800)]
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm bugfix from Dave Airlie:
"Just a single urgent regression fix, seeing a few wierd behaviours I'd
like not to persist."
* 'drm-next' of git://people.freedesktop.org/~airlied/linux:
drm/ttm: fix delayed ttm_bo_cleanup_refs_and_unlock delayed handling
Linus Torvalds [Thu, 20 Dec 2012 04:23:37 +0000 (20:23 -0800)]
Merge tag 'random_for_linus' of git://git./linux/kernel/git/tytso/random
Pull random updates from Ted Ts'o:
"A few /dev/random improvements for the v3.8 merge window."
* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
random: Mix cputime from each thread that exits to the pool
random: prime last_data value per fips requirements
random: fix debug format strings
random: make it possible to enable debugging without rebuild
David S. Miller [Wed, 19 Dec 2012 23:44:31 +0000 (15:44 -0800)]
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in CAMELLIA code.
We use the FPU and therefore cannot sleep during the crypto
loops.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 19 Dec 2012 23:43:38 +0000 (15:43 -0800)]
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in DES code.
We use the FPU and therefore cannot sleep during the crypto
loops.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 19 Dec 2012 23:30:07 +0000 (15:30 -0800)]
sparc64: Fix ECB looping constructs in AES code.
Things works better when you increment the source buffer pointer
properly.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 19 Dec 2012 23:22:03 +0000 (15:22 -0800)]
sparc64: Set CRYPTO_TFM_REQ_MAY_SLEEP consistently in AES code.
We use the FPU and therefore cannot sleep during the crypto
loops.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 19 Dec 2012 23:20:23 +0000 (15:20 -0800)]
sparc64: Fix AES ctr mode block size.
Like the generic versions, we need to support a block size
of '1' for CTR mode AES.
This was discovered thanks to all of the new test cases added by
Jussi Kivilinna.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 19 Dec 2012 23:19:11 +0000 (15:19 -0800)]
sparc64: Fix unrolled AES 256-bit key loops.
The basic scheme of the block mode assembler is that we start by
enabling the FPU, loading the key into the floating point registers,
then iterate calling the encrypt/decrypt routine for each block.
For the 256-bit key cases, we run short on registers in the unrolled
loops.
So the {ENCRYPT,DECRYPT}_256_2() macros reload the key registers that
get clobbered.
The unrolled macros, {ENCRYPT,DECRYPT}_256(), are not mindful of this.
So if we have a mix of multi-block and single-block calls, the
single-block unrolled 256-bit encrypt/decrypt can run with some
of the key registers clobbered.
Handle this by always explicitly loading those registers before using
the non-unrolled 256-bit macro.
This was discovered thanks to all of the new test cases added by
Jussi Kivilinna.
Signed-off-by: David S. Miller <davem@davemloft.net>
David Woodhouse [Wed, 19 Dec 2012 11:01:21 +0000 (11:01 +0000)]
solos-pci: ensure all TX packets are aligned to 4 bytes
The FPGA can't handled unaligned DMA (yet). So copy into an aligned buffer,
if skb->data isn't suitably aligned.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nathan Williams [Wed, 19 Dec 2012 11:01:20 +0000 (11:01 +0000)]
solos-pci: add firmware upgrade support for new models
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nathan Williams [Wed, 19 Dec 2012 11:01:19 +0000 (11:01 +0000)]
solos-pci: remove superfluous debug output
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nathan Williams [Wed, 19 Dec 2012 11:01:18 +0000 (11:01 +0000)]
solos-pci: add GPIO support for newer versions on Geos board
dwmw2: Tidy up a little, simpler matching on which GPIO is being accessed,
only register on newer boards, register under PCI device instead of
duplicating them under each ATM device.
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
John Greene [Wed, 19 Dec 2012 09:47:48 +0000 (09:47 +0000)]
8139cp: Prevent dev_close/cp_interrupt race on MTU change
commit:
cb64edb6b89491edfdbae52ba7db9a8b8391d339 upstream
Above commit may introduce a race between cp_interrupt and dev_close
/ change MTU / dev_open up state. Changes cp_interrupt to tolerate
this. Change spin_locking in cp_interrupt to avoid possible
but unobserved race.
Reported-by: "Francois Romieu" <romieu@fr.zoreil.com>
Tested on virtual hardware, Tx MTU size up to 4096, max tx payload
was ping -s 4068 for MTU of 4096. No real hardware, need test
assist.
Signed-off-by: "John Greene" <jogreene@redhat.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: "David Woodhouse" <David.Woodhouse@intel.com>
Tested-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Gregory CLEMENT [Wed, 19 Dec 2012 11:31:11 +0000 (12:31 +0100)]
gpio/mvebu-gpio: Make mvebu-gpio depend on OF_CONFIG
When building without device tree support (for the mv78x00 SoCs for
example), the build failed because of_irq_count is undeclared. However
mvebu-gpio is not designed to build without device tree support. So
make it depends on OF_CONFIG, remove the #ifdef OF_CONFIG line and the
platform_device_id.
Tested on RD-78x00-mASA, DB-78460-BP, DB-
88F6710-BP-DDR3,
DB-MV784MP-GP, Mirabox and OpenBlocks AX3.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Jean Delvare [Sun, 16 Dec 2012 20:31:40 +0000 (21:31 +0100)]
gpio/ich: Add missing spinlock init
As reported by CONFIG_DEBUG_SPINLOCK=y.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Maarten Lankhorst [Wed, 19 Dec 2012 17:21:10 +0000 (18:21 +0100)]
drm/ttm: fix delayed ttm_bo_cleanup_refs_and_unlock delayed handling
Fix regression introduced by
85b144f860176
"drm/ttm: call ttm_bo_cleanup_refs with reservation and lru lock held, v3"
Slowpath ttm_bo_cleanup_refs_and_unlock accidentally tried to increase
refcount on &bo->sync_obj instead of bo->sync_obj.
The compiler didn't complain since sync_obj_ref takes a void pointer,
so it was still valid c.
This could result in lockups, memory corruptions, and warnings like
these when graphics card VRAM usage is high:
------------[ cut here ]------------
WARNING: at include/linux/kref.h:42 radeon_fence_ref+0x2c/0x40()
Hardware name: System Product Name
Pid: 157, comm: X Not tainted
3.7.0-rc7-00520-g85b144f-dirty #174
Call Trace:
[<
ffffffff81058c84>] ? warn_slowpath_common+0x74/0xb0
[<
ffffffff8129273c>] ? radeon_fence_ref+0x2c/0x40
[<
ffffffff8125e95c>] ? ttm_bo_cleanup_refs_and_unlock+0x18c/0x2d0
[<
ffffffff8125f17c>] ? ttm_mem_evict_first+0x1dc/0x2a0
[<
ffffffff81264452>] ? ttm_bo_man_get_node+0x62/0xb0
[<
ffffffff8125f4ce>] ? ttm_bo_mem_space+0x28e/0x340
[<
ffffffff8125fb0c>] ? ttm_bo_move_buffer+0xfc/0x170
[<
ffffffff810de172>] ? kmem_cache_alloc+0xb2/0xc0
[<
ffffffff8125fc15>] ? ttm_bo_validate+0x95/0x110
[<
ffffffff8125ff7c>] ? ttm_bo_init+0x2ec/0x3b0
[<
ffffffff8129419a>] ? radeon_bo_create+0x18a/0x200
[<
ffffffff81293e80>] ? radeon_bo_clear_va+0x40/0x40
[<
ffffffff812a5342>] ? radeon_gem_object_create+0x92/0x160
[<
ffffffff812a575c>] ? radeon_gem_create_ioctl+0x6c/0x150
[<
ffffffff812a529f>] ? radeon_gem_object_free+0x2f/0x40
[<
ffffffff81246b60>] ? drm_ioctl+0x420/0x4f0
[<
ffffffff812a56f0>] ? radeon_gem_pwrite_ioctl+0x20/0x20
[<
ffffffff810f53a4>] ? do_vfs_ioctl+0x2e4/0x4e0
[<
ffffffff810e5588>] ? vfs_read+0x118/0x160
[<
ffffffff810f55ec>] ? sys_ioctl+0x4c/0xa0
[<
ffffffff810e5851>] ? sys_read+0x51/0xa0
[<
ffffffff814b0612>] ? system_call_fastpath+0x16/0x1b
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Acked-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Jean Delvare [Wed, 19 Dec 2012 21:17:02 +0000 (22:17 +0100)]
hwmon-vid: Add support for AMD family 11h to 15h processors
Since family 11h processors, AMD is exclusively using 7-bit VID codes
transmitted using a serial protocol over two pins (clock and data.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: David Hubbard <david.c.hubbard@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Guenter Roeck [Wed, 19 Dec 2012 21:17:02 +0000 (22:17 +0100)]
hwmon: (it87) Support PECI for additional chips
Extend support for reporting and selecting PECI temperature sensors
to IT8718, IT8720, IT8782, and IT8783. For IT8721, report the sensor
type for temp2 as Intel PECI (6) if the chip is configured to report
the PCH temperature.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:02 +0000 (22:17 +0100)]
hwmon: (it87) Report thermal sensor type as Intel PECI if appropriate
IT8721 and IT8728 support Intel PECI temperature reporting. Each sensor
can be programmed to display the temperature reported on the PECI interface.
If configured for Intel PECI, the driver reported the wrong sensor type for
the respective thermal sensor. Fix the code to correctly report it as
"Intel PECI (6)".
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:02 +0000 (22:17 +0100)]
hwmon: (it87) Manage device specific features with table
This simplifies the code, improves runtime performance, reduces
code size (about 280 bytes on x86_64), and makes it easier
to add support for new devices.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:02 +0000 (22:17 +0100)]
hwmon: (it87) Replace pwm group macro with direct attribute definitions
Fix checkpatch error:
ERROR: Macros with multiple statements should be enclosed in a do - while loop
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:01 +0000 (22:17 +0100)]
hwmon: (it87) Avoid quoted string splits across lines
Fix the respective checkpatch warnings.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:01 +0000 (22:17 +0100)]
hwmon: (it87) Save fan registers in 2-dimensional array
Also unify fan functions to use the same code for 8 and 16 bit fans.
This patch reduces code size by approximately 1,200 bytes on x86_64.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:01 +0000 (22:17 +0100)]
hwmon: (it87) Introduce support for tempX_offset sysfs attribute
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:01 +0000 (22:17 +0100)]
hwmon: (it87) Replace macro defining tempX_type sensors with direct definitions
The macro name show_sensor_offset is confusing since it related to the sensor
type, not an offset - even more so when we introduce offset attributes later on.
Replace it with direct definitions, and replace the show_sensor/set_sensor
function names with show_temp_type/set_temp_type. This also resolves a
checkpatch error.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:00 +0000 (22:17 +0100)]
hwmon: (it87) Save voltage register values in 2-dimensional array
Reduces code size (more than 600 bytes on x86_64),
and gets rid of some checkpatch errors.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Wed, 19 Dec 2012 21:17:00 +0000 (22:17 +0100)]
hwmon: (it87) Save temperature registers in 2-dimensional array
Cleaner code, fewer checkpatch errors, and reduced code size
(saves more than 500 bytes on x86-64).
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Wed, 19 Dec 2012 21:17:00 +0000 (22:17 +0100)]
hwmon: (w83627ehf) Get rid of smatch warnings
The smatch static code analyzer complains:
drivers/hwmon/w83627ehf.c:911 w83627ehf_update_device() error: buffer overflow 'W83627EHF_REG_TEMP_OFFSET' 3 <= 8
drivers/hwmon/w83627ehf.c:909 w83627ehf_update_device() error: buffer overflow 'data->temp_offset' 3 <= 8
drivers/hwmon/w83627ehf.c:2672 w83627ehf_resume() error: buffer overflow 'W83627EHF_REG_TEMP_OFFSET' 3 <= 8
drivers/hwmon/w83627ehf.c:2673 w83627ehf_resume() error: buffer overflow 'data->temp_offset' 3 <= 8
A deeper analysis of the code shows that these are false positives, as
only the lower 3 bits of data->have_temp_offset can be set so the
write is never attempted with i >= 3. However this shows that the code
isn't very robust and future changes could easily introduce a buffer
overflow. So let's add a safety check to prevent that and make smatch
happy.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Peter Huewe <PeterHuewe@gmx.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Wed, 19 Dec 2012 21:17:00 +0000 (22:17 +0100)]
hwmon: (w83627hf) Don't touch nonexistent I2C address registers
Only the W83627HF could be accessed through I2C. All other supported
chips are LPC-only, so they do not have I2C address registers. Don't
write to nonexistent or reserved registers on these chips.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Wed, 19 Dec 2012 21:16:59 +0000 (22:16 +0100)]
hwmon: (w83627ehf) Add support for suspend
On suspend some register values are lost, most notably the Value RAM
areas but also other limits and settings. Restore them on resume.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Wed, 19 Dec 2012 21:16:59 +0000 (22:16 +0100)]
hwmon: (w83627hf) Add support for suspend
On suspend some register values are lost, most notably the Value RAM
areas but also other limits. Restore them on resume. On top of that,
some fixups are needed to work around BIOS bugs, in particular when
the BIOS omits running the same initialization sequence on resume
that it does after boot. In that case we have to carry initialization
over suspend.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Wed, 19 Dec 2012 21:16:59 +0000 (22:16 +0100)]
hwmon: Fix PCI device reference leak in quirk
Thankfully this only affects systems with one specific south bridge
and is most probably harmless unless the hwmon module is heavily
cycled.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Linus Torvalds [Wed, 19 Dec 2012 21:05:22 +0000 (13:05 -0800)]
Merge tag 'xtensa-
20121218' of git://github.com/czankel/xtensa-linux
Pull Xtensa patchset from Chris Zankel:
"This contains support of device trees, many fixes, and code clean-ups"
* tag 'xtensa-
20121218' of git://github.com/czankel/xtensa-linux: (33 commits)
xtensa: don't try to build DTB when OF is disabled
xtensa: set the correct ethernet address for xtfpga
xtensa: clean up files to make them code-style compliant
xtensa: provide endianness macro for sparse
xtensa: fix RASID SR initialization
xtensa: initialize CPENABLE SR when core has one
xtensa: reset all timers on initialization
Use for_each_compatible_node() macro.
xtensa: add XTFPGA DTS
xtensa: add support for the XTFPGA boards
xtensa: add device trees support
xtensa: add IRQ domains support
xtensa: add U-Boot image support (uImage).
xtensa: clean up boot make rules
xtensa: fix mb and wmb definitions
xtensa: add s32c1i-based spinlock implementations
xtensa: add s32c1i-based bitops implementations
xtensa: add s32c1i-based atomic ops implementations
xtensa: add s32c1i sanity check
xtensa: add trap_set_handler function
...
Linus Torvalds [Wed, 19 Dec 2012 21:02:23 +0000 (13:02 -0800)]
Merge branch 'x86/nuke386' of git://git./linux/kernel/git/tip/tip
Pull one final 386 removal patch from Peter Anvin.
IRQ 13 FPU error handling is gone. That was not one of the proudest
moments in PC history.
* 'x86/nuke386' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, 386 removal: Remove support for IRQ 13 FPU error reporting
Linus Torvalds [Wed, 19 Dec 2012 20:56:42 +0000 (12:56 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull small x86 fixes from Peter Anvin:
"A collection of very small fixes, mostly pure documentation."
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, doc: Document that bootloader ID 4 is used also by iPXE
x86, doc: Add a formal bootloader ID for kexec-tools
x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI laptops
Bjørn Mork [Wed, 19 Dec 2012 04:15:51 +0000 (04:15 +0000)]
net: qmi_wwan: add ZTE MF880
The driver description files gives these names to the vendor specific
functions on this modem:
diag: VID_19D2&PID_0284&MI_00
nmea: VID_19D2&PID_0284&MI_01
at: VID_19D2&PID_0284&MI_02
mdm: VID_19D2&PID_0284&MI_03
net: VID_19D2&PID_0284&MI_04
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sachin Kamat [Wed, 19 Dec 2012 01:17:10 +0000 (01:17 +0000)]
drivers/net: Use of_match_ptr() macro in smsc911x.c
Add CONFIG_OF guard and use of_match_ptr macro.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sachin Kamat [Wed, 19 Dec 2012 01:17:09 +0000 (01:17 +0000)]
drivers/net: Use of_match_ptr() macro in smc91x.c
This eliminates having an #ifdef returning NULL for the case
when OF is disabled.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Ding [Tue, 18 Dec 2012 12:08:56 +0000 (12:08 +0000)]
ipv6: addrconf.c: remove unnecessary "if"
the value of err is always negative if it goes to errout, so we don't need to
check the value of err.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vlad Yasevich [Tue, 18 Dec 2012 11:54:08 +0000 (11:54 +0000)]
bridge: Correctly encode addresses when dumping mdb entries
When dumping mdb table, set the addresses the kernel returns
based on the address protocol type.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vlad Yasevich [Wed, 19 Dec 2012 09:13:48 +0000 (09:13 +0000)]
bridge: Do not unregister all PF_BRIDGE rtnl operations
Bridge fdb and link rtnl operations are registered in
core/rtnetlink. Bridge mdb operations are registred
in bridge/mdb. When removing bridge module, do not
unregister ALL PF_BRIDGE ops since that would remove
the ops from rtnetlink as well. Do remove mdb ops when
bridge is destroyed.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 19 Dec 2012 20:47:41 +0000 (12:47 -0800)]
Merge tag 'for-linus-
20121219' of git://git.infradead.org/linux-mtd
Pull MTD updates from David Woodhouse:
- Various cleanups especially in NAND tests
- Add support for NAND flash on BCMA bus
- DT support for sh_flctl and denali NAND drivers
- Kill obsolete/superceded drivers (fortunet, nomadik_nand)
- Fix JFFS2 locking bug in ENOMEM failure path
- New SPI flash chips, as usual
- Support writing in 'reliable mode' for DiskOnChip G4
- Debugfs support in nandsim
* tag 'for-linus-
20121219' of git://git.infradead.org/linux-mtd: (96 commits)
mtd: nand: typo in nand_id_has_period() comments
mtd: nand/gpio: use io{read,write}*_rep accessors
mtd: block2mtd: throttle writes by calling balance_dirty_pages_ratelimited.
mtd: nand: gpmi: reset BCH earlier, too, to avoid NAND startup problems
mtd: nand/docg4: fix and improve read of factory bbt
mtd: nand/docg4: reserve bb marker area in ecclayout
mtd: nand/docg4: add support for writing in reliable mode
mtd: mxc_nand: reorder part_probes to let cmdline override other sources
mtd: mxc_nand: fix unbalanced clk_disable() in error path
mtd: nandsim: Introduce debugfs infrastructure
mtd: physmap_of: error checking to prevent a NULL pointer dereference
mtg: docg3: potential divide by zero in doc_write_oob()
mtd: bcm47xxnflash: writing support
mtd: tests/read: initialize buffer for whole next page
mtd: at91: atmel_nand: return bit flips for the PMECC read_page()
mtd: fix recovery after failed write-buffer operation in cfi_cmdset_0002.c
mtd: nand: onfi need to be probed in 8 bits mode
mtd: nand: add NAND_BUSWIDTH_AUTO to autodetect bus width
mtd: nand: print flash size during detection
mted: nand_wait_ready timeout fix
...
Oliver Neukum [Tue, 18 Dec 2012 04:46:12 +0000 (04:46 +0000)]
use generic usbnet_manage_power()
This covers the drivers that can use a primitive
implementation.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Oliver Neukum [Tue, 18 Dec 2012 04:45:52 +0000 (04:45 +0000)]
usbnet: generic manage_power()
Centralise common code for manage_power() in usbnet
by making a generic simple implementation
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Oliver Neukum [Tue, 18 Dec 2012 04:45:29 +0000 (04:45 +0000)]
usbnet: handle PM failure gracefully
If a device fails to do remote wakeup, this is no reason
to abort an open totally. This patch just continues without
runtime PM.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lennert Buytenhek [Tue, 18 Dec 2012 03:57:00 +0000 (03:57 +0000)]
ksz884x: fix receive polling race condition
The ksz884x driver does receive processing in a custom tasklet, and
seems to be assuming that since it takes its private interface spinlock
with spin_lock_irq(), it won't be running concurrently with its own
interrupt handler, as it cannot be preempted by it, but since its
interrupt handler doesn't do any locking whatsoever, the receive
processing tasklet and interrupt handler can end up running concurrently
on different CPUs.
As a result of this, the ksz884x receive path ends up locking up fairly
easily, when the receive processing tasklet's reenabling of receive
interrupts (due to it being done with polling the receive ring) races
with the interrupt handler's disabling of receive interrupts (due to a
new receive interrupt coming in) resulting in the receive interrupt
being masked but the receive processing tasklet not being scheduled.
Fix this by making the ksz884x interrupt handler take its private
interface spinlock. This requires upgrading the spin_lock() in the
transmit cleanup tasklet to a spin_lock_irq(), as otherwise the IRQ
handler can preempt transmit cleanup and deadlock the system, but
with those two changes, no more receive lockups have been observed.
Reported-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
----
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sony Chacko [Tue, 18 Dec 2012 07:59:51 +0000 (07:59 +0000)]
qlcnic: update driver version
Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Shahed Shaikh [Tue, 18 Dec 2012 07:59:50 +0000 (07:59 +0000)]
qlcnic: fix unused variable warnings
qlcnic_hw.c:370: warning: variable cmd_desc set but not used
qlcnic_hw.c:368: warning: variable consumer set but not used
qlcnic_main.c:448: warning: variable ref_count set but not used
qlcnic_main.c:534: warning: variable mem_base set but not used
qlcnic_ctx.c:137: warning: variable tmp_tmpl set but not used
qlcnic_ctx.c:133: warning: variable version set but not used
qlcnic_minidump.c:200: warning: variable opcode set but not used
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bjørn Mork [Wed, 19 Dec 2012 19:51:31 +0000 (20:51 +0100)]
watchdog: Fix disable/enable regression
Commit
8d4516904b39 ("watchdog: Fix CPU hotplug regression") causes an
oops or hard lockup when doing
echo 0 > /proc/sys/kernel/nmi_watchdog
echo 1 > /proc/sys/kernel/nmi_watchdog
and the kernel is booted with nmi_watchdog=1 (default)
Running laptop-mode-tools and disconnecting/connecting AC power will
cause this to trigger, making it a common failure scenario on laptops.
Instead of bailing out of watchdog_disable() when !watchdog_enabled we
can initialize the hrtimer regardless of watchdog_enabled status. This
makes it safe to call watchdog_disable() in the nmi_watchdog=0 case,
without the negative effect on the enabled => disabled => enabled case.
All these tests pass with this patch:
- nmi_watchdog=1
echo 0 > /proc/sys/kernel/nmi_watchdog
echo 1 > /proc/sys/kernel/nmi_watchdog
- nmi_watchdog=0
echo 0 > /sys/devices/system/cpu/cpu1/online
- nmi_watchdog=0
echo mem > /sys/power/state
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=51661
Cc: <stable@vger.kernel.org> # v3.7
Cc: Norbert Warmuth <nwarmuth@t-online.de>
Cc: Joseph Salisbury <joseph.salisbury@canonical.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
John W. Linville [Wed, 19 Dec 2012 18:00:00 +0000 (13:00 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem
Linus Torvalds [Wed, 19 Dec 2012 16:19:07 +0000 (08:19 -0800)]
Merge tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm
Pull pwm changes from Thierry Reding:
"A new driver has been added for the SPEAr platform and the
TWL4030/6030 driver has been replaced by two drivers that control the
regular PWMs and the PWM driven LEDs provided by the chips.
The vt8500, tiecap, tiehrpwm, i.MX, LPC32xx and Samsung drivers have
all been improved and the device tree bindings now support the PWM
signal polarity."
Fix up trivial conflicts due to __devinit/exit removal.
* tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm: (21 commits)
pwm: samsung: add missing s3c->pwm_id assignment
pwm: lpc32xx: Set the chip base for dynamic allocation
pwm: lpc32xx: Properly disable the clock on device removal
pwm: lpc32xx: Fix the PWM polarity
pwm: i.MX: eliminate build warning
pwm: Export of_pwm_xlate_with_flags()
pwm: Remove pwm-twl6030 driver
pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs
pwm: New driver to support PWMs on TWL4030/6030 series of PMICs
pwm: pwm-tiehrpwm: pinctrl support
pwm: tiehrpwm: Add device-tree binding
pwm: pwm-tiehrpwm: Adding TBCLK gating support.
pwm: pwm-tiecap: pinctrl support
pwm: tiecap: Add device-tree binding
pwm: Add TI PWM subsystem driver
pwm: Device tree support for PWM polarity
pwm: vt8500: Ensure PWM clock is enabled during pwm_config
pwm: vt8500: Fix build error
pwm: spear: Staticize spear_pwm_config()
pwm: Add SPEAr PWM chip driver support
...
Jonas Gorski [Wed, 19 Dec 2012 15:10:09 +0000 (09:10 -0600)]
of: define struct device in of_platform.h if !OF_DEVICE and !OF_ADDRESS
Fixes the following warning:
include/linux/of_platform.h:106:13: warning: 'struct device' declared
inside parameter list [enabled by default]
include/linux/of_platform.h:106:13: warning: its scope is only this
definition or declaration, which is probably not what you want [enabled
by default]
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Rob Herring <robherring2@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Linus Torvalds [Wed, 19 Dec 2012 16:14:08 +0000 (08:14 -0800)]
Merge tag 'for-v3.8-part2' of git://git.infradead.org/battery-2.6
Pull battery update, part 2, from Anton Vorontsov:
"These are left overs that I didn't have time to review/apply before
the merge window opened. I didn't want to "spoil" the first pull
request with these late patches, so they were not included:
- A small patch for the RX51 OMAP board (Nokia N900 phone), the patch
creates a battery monitor device instance, so that it can be
probed. It was acked by the OMAP maintainer;
- A couple of late bug fixes for the charger-manager: corrects corner
cases for the battery full handling."
* tag 'for-v3.8-part2' of git://git.infradead.org/battery-2.6:
charger-manager: Fix bug when check dropped voltage after fullbatt event
charger-manager: Fix bug related to checking fully charged state of battery
ARM: OMAP: rx51: Register platform device for rx51_battery
David Howells [Wed, 19 Dec 2012 16:07:18 +0000 (16:07 +0000)]
UAPI: (Scripted) Disintegrate arch/m32r/include/asm
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
David Howells [Wed, 19 Dec 2012 16:07:13 +0000 (16:07 +0000)]
UAPI: (Scripted) Disintegrate arch/h8300/include/asm
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Linus Torvalds [Wed, 19 Dec 2012 15:55:08 +0000 (07:55 -0800)]
Merge tag 'modules-next-for-linus' of git://git./linux/kernel/git/rusty/linux
Pull module update from Rusty Russell:
"Nothing all that exciting; a new module-from-fd syscall for those who
want to verify the source of the module (ChromeOS) and/or use standard
IMA on it or other security hooks."
* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
MODSIGN: Fix kbuild output when using default extra_certificates
MODSIGN: Avoid using .incbin in C source
modules: don't hand 0 to vmalloc.
module: Remove a extra null character at the top of module->strtab.
ASN.1: Use the ASN1_LONG_TAG and ASN1_INDEFINITE_LENGTH constants
ASN.1: Define indefinite length marker constant
moduleparam: use __UNIQUE_ID()
__UNIQUE_ID()
MODSIGN: Add modules_sign make target
powerpc: add finit_module syscall.
ima: support new kernel module syscall
add finit_module syscall to asm-generic
ARM: add finit_module syscall to ARM
security: introduce kernel_module_from_file hook
module: add flags arg to sys_finit_module()
module: add syscall to load module from fd
Linus Torvalds [Wed, 19 Dec 2012 15:52:48 +0000 (07:52 -0800)]
Merge tag 'byteswap-for-linus-
20121219' of git://git.infradead.org/users/dwmw2/byteswap
Pull preparatory gcc intrisics bswap patch from David Woodhouse:
"This single patch is effectively a no-op for now. It enables
architectures to opt in to using GCC's __builtin_bswapXX() intrinsics
for byteswapping, and if we merge this now then the architecture
maintainers can enable it for their arch during the next cycle without
dependency issues.
It's worth making it a par-arch opt-in, because although in *theory*
the compiler should never do worse than hand-coded assembler (and of
course it also ought to do a lot better on platforms like Atom and
PowerPC which have load-and-swap or store-and-swap instructions), that
isn't always the case. See
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46453
for example."
* tag 'byteswap-for-linus-
20121219' of git://git.infradead.org/users/dwmw2/byteswap:
byteorder: allow arch to opt to use GCC intrinsics for byteswapping
Linus Torvalds [Wed, 19 Dec 2012 15:18:35 +0000 (07:18 -0800)]
blk: avoid divide-by-zero with zero discard granularity
Commit
8dd2cb7e880d ("block: discard granularity might not be power of
2") changed a couple of 'binary and' operations into modulus operations.
Which turned the harmless case of a zero discard_granularity into a
possible divide-by-zero.
The code also had a much more subtle bug: it was doing the modulus of a
value in bytes using 'sector_t'. That was always conceptually wrong,
but didn't actually matter back when the code assumed a power-of-two
granularity: we only looked at the low bits anyway.
But with potentially arbitrary sector numbers, using a 'sector_t' to
express bytes is very very wrong: depending on configuration it limits
the starting offset of the device to just 32 bits, and any overflow
would result in a wrong value if the modulus wasn't a power-of-two.
So re-write the code to not only protect against the divide-by-zero, but
to do the starting sector arithmetic in sectors, and using the proper
types.
[ For any mathematicians out there: it also looks monumentally stupid to
do the 'modulo granularity' operation *twice*, never mind having a "+
granularity" in the second modulus op.
But that's the easiest way to avoid negative values or overflow, and
it is how the original code was done. ]
Reported-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Doug Anderson <dianders@chromium.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Shaohua Li <shli@fusionio.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cyril Roelandt [Wed, 12 Dec 2012 00:24:54 +0000 (01:24 +0100)]
spi/sh-hspi: fix return value check in hspi_probe().
According to its documentation, clk_get() returns a "valid IS_ERR() condition
containing errno", so we should call IS_ERR() rather than a NULL check.
Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Allen Martin [Fri, 14 Dec 2012 19:05:12 +0000 (11:05 -0800)]
spi: fix tegra SPI binding examples
Fix name of slink binding and address of sflash example to make it
self consistent.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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