Atsushi Nemoto [Wed, 9 Sep 2009 00:53:05 +0000 (17:53 -0700)]
dmaengine: Move all map_sg/unmap_sg for slave channel to its client
Dan Williams wrote:
... DMA-slave clients request specific channels and know the hardware
details at a low level, so it should not be too high an expectation to
push dma mapping responsibility to the client.
Also this patch includes DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE support for
dw_dmac driver.
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Ira Snyder [Wed, 9 Sep 2009 00:53:04 +0000 (17:53 -0700)]
fsldma: Add DMA_SLAVE support
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices into a scatterlist at the same time.
This also adds support to enable some controller-specific features such as
external start and external pause for a DMA transaction.
[dan.j.williams@intel.com: rebased on tx_list movement]
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Acked-by: Li Yang <leoli@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Ira Snyder [Wed, 9 Sep 2009 00:53:04 +0000 (17:53 -0700)]
fsldma: split apart external pause and request count features
When using the Freescale DMA controller in external control mode, both the
request count and external pause bits need to be setup correctly. This was
being done with the same function.
The 83xx controller lacks the external pause feature, but has a similar
feature called external start. This feature requires that the request count
bits be setup correctly.
Split the function into two parts, to make it possible to use the external
start feature on the 83xx controller.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:04 +0000 (17:53 -0700)]
ioat2,3: cacheline align software descriptor allocations
All the necessary fields for handling an ioat2,3 ring entry can fit into
one cacheline. Move ->len prior to ->txd in struct ioat_ring_ent, and
move allocation of these entries to a hw-cache-aligned kmem cache to
reduce the number of cachelines dirtied for descriptor management.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:04 +0000 (17:53 -0700)]
dmaengine: kill tx_list
The tx_list attribute of struct dma_async_tx_descriptor is common to
most, but not all dma driver implementations. None of the upper level
code (dmaengine/async_tx) uses it, so allow drivers to implement it
locally if they need it. This saves sizeof(struct list_head) bytes for
drivers that do not manage descriptors with a linked list (e.g.: ioatdma
v2,3).
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:03 +0000 (17:53 -0700)]
txx9dmac: implement a private tx_list
Drop txx9dmac's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:03 +0000 (17:53 -0700)]
at_hdmac: implement a private tx_list
Drop at_hdmac's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:03 +0000 (17:53 -0700)]
mv_xor: implement a private tx_list
Drop mv_xor's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:02 +0000 (17:53 -0700)]
ioat: implement a private tx_list
Drop ioatdma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:02 +0000 (17:53 -0700)]
iop-adma: implement a private tx_list
Drop iop-adma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:02 +0000 (17:53 -0700)]
fsldma: implement a private tx_list
Drop fsldma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Li Yang <leoli@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:53:02 +0000 (17:53 -0700)]
dw_dmac: implement a private tx_list
Drop dw_dmac's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:52:57 +0000 (17:52 -0700)]
Merge branch 'ioat' into dmaengine
Dan Williams [Tue, 8 Sep 2009 19:02:15 +0000 (12:02 -0700)]
net_dma: poll for a descriptor after allocation failure
Handle descriptor allocation failures by polling for a descriptor. The
driver will force forward progress when polled. In the best case this
polling interval will be the time it takes for one dma memcpy
transaction to complete. In the worst case, channel hang, we will need
to wait 100ms for the cleanup watchdog to fire (ioatdma driver).
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:02:01 +0000 (12:02 -0700)]
ioat2,3: dynamically resize descriptor ring
Increment the allocation order of the descriptor ring every time we run
out of descriptors up to a maximum of allocation order specified by the
module parameter 'ioat_max_alloc_order'. After each idle period
decrement the allocation order to a minimum order of
'ioat_ring_alloc_order' (i.e. the default ring size, tunable as a module
parameter).
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:49 +0000 (12:01 -0700)]
ioat: switch watchdog and reset handler from workqueue to timer
In order to support dynamic resizing of the descriptor ring or polling
for a descriptor in the presence of a hung channel the reset handler
needs to make progress while in a non-preemptible context. The current
workqueue implementation precludes polling channel reset completion
under spin_lock().
This conversion also allows us to return to opportunistic cleanup in the
ioat2 case as the timer implementation guarantees at least one cleanup
after every descriptor is submitted. This means the worst case
completion latency becomes the timer frequency (for exceptional
circumstances), but with the benefit of avoiding busy waiting when the
lock is contended.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:38 +0000 (12:01 -0700)]
ioat1: trim ioat_dma_desc_sw
Save 4 bytes per software descriptor by transmitting tx_cnt in an unused
portion of the hardware descriptor.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:30 +0000 (12:01 -0700)]
ioat: ___devinit annotate the initialization paths
Mark all single use initialization routines with __devinit.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:21 +0000 (12:01 -0700)]
ioat: preserve chanctrl bits when re-arming interrupts
The register write in ioat_dma_cleanup_tasklet is unfortunate in two
ways:
1/ It clears the extra 'enable' bits that we set at alloc_chan_resources time
2/ It gives the impression that it disables interrupts when it is in
fact re-arming interrupts
[ Impact: fix, persist the value of the chanctrl register when re-arming ]
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:14 +0000 (12:01 -0700)]
ioat: ignore reserved bits for chancnt and xfercap
Don't trust that the reserved bits are always zero, also sanity check
the returned value.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:01:04 +0000 (12:01 -0700)]
ioat: cleanup completion status reads
The cleanup path makes an effort to only perform an atomic read of the
64-bit completion address. However in the 32-bit case it does not
matter if we read the upper-32 and lower-32 non-atomically because the
upper-32 will always be zero.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:00:55 +0000 (12:00 -0700)]
ioat: add some dev_dbg() calls
Provide some output for debugging the driver.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 19:00:46 +0000 (12:00 -0700)]
ioat1: kill unused unmap parameters
The unified ioat1/ioat2 ioat_dma_unmap() implementation derives the
source and dest addresses from the unmap descriptor. There is no longer
a need to track this information in struct ioat_desc_sw.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 26 Aug 2009 20:01:44 +0000 (13:01 -0700)]
ioat2,3: convert to a true ring buffer
Replace the current linked list munged into a ring with a native ring
buffer implementation. The benefit of this approach is reduced overhead
as many parameters can be derived from ring position with simple pointer
comparisons and descriptor allocation/freeing becomes just a
manipulation of head/tail pointers.
It requires a contiguous allocation for the software descriptor
information.
Since this arrangement is significantly different from the ioat1 chain,
move ioat2,3 support into its own file and header. Common routines are
exported from driver/dma/ioat/dma.[ch].
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:44:50 +0000 (14:44 -0700)]
ioat: prepare the code for ioat[12]_dma_chan split
Prepare the code for the conversion of the ioat2 linked-list-ring into a
native ring buffer. After this conversion ioat2 channels will share
less of the ioat1 infrastructure, but there will still be places where
sharing is possible. struct ioat_chan_common is created to house the
channel attributes that will remain common between ioat1 and ioat2
channels.
For every routine that accesses both common and hardware specific fields
the old unified 'ioat_chan' pointer is split into an 'ioat' and 'chan'
pointer. Where 'chan' references common fields and 'ioat' the
hardware/version specific.
[ Impact: pure structure member movement/variable renames, no logic changes ]
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:44:05 +0000 (14:44 -0700)]
ioat: fix self test interrupts
If a callback is to be attached to a descriptor the channel needs to
know at ->prep time so it can set the interrupt enable bit. This is in
preparation for moving descriptor ioat2 descriptor preparation from
->submit to ->prep.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:44:04 +0000 (14:44 -0700)]
ioat1: move descriptor allocation from submit to prep
The async_tx api assumes that after a successful ->prep a subsequent
->submit will not fail due to a lack of resources.
This also fixes a bug in the allocation failure case. Previously the
descriptors allocated prior to the allocation failure would not be
returned to the free list.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:44:04 +0000 (14:44 -0700)]
ioat: define descriptor control bit-field
This cleans up a mess of and'ing and or'ing bit definitions, and allows
simple assignments from the specified dma_ctrl_flags parameter.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:44:04 +0000 (14:44 -0700)]
ioat: fix type mismatch for ->dmacount
->dmacount tracks the sequence number of active descriptors. It is
written to the DMACOUNT register to update the channel's view of pending
descriptors in the chain. The register is 16-bits so ->dmacount should
be unsigned and 16-bit as well. Also modify ->desccount to maintain
alignment.
This was never a problem in practice because we never compared dmacount
values, but this is a bug waiting to happen.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:42:38 +0000 (14:42 -0700)]
ioat: split ioat_dma_probe into core/version-specific routines
Towards the removal of ioatdma_device.version split the initialization
path into distinct versions. This conversion:
1/ moves version specific probe code to version specific routines
2/ removes the need for ioat_device
3/ turns off the ioat1 msi quirk if the device is reinitialized for intx
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:42:32 +0000 (14:42 -0700)]
ioat: kill function prototype ifdef guards
The only .c files that utilize these protected prototypes depend on
CONFIG_INTEL_IOATDMA=y, so there is no value gained in providing empty
prototypes.
[ Impact: pure cleanup ]
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 28 Jul 2009 21:33:42 +0000 (14:33 -0700)]
ioat: cleanup some long deref chains and 80 column collisions
* reduce device->common. to dma-> in ioat_dma_{probe,remove,selftest}
* ioat_lookup_chan_by_index to ioat_chan_by_index
* multi-line function definitions
* ioat_desc_sw.async_tx to ioat_desc_sw.txd
* desc->txd. to tx-> in cleanup routine
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:29:44 +0000 (17:29 -0700)]
ioat: convert ioat_probe to pcim/devm
The driver currently duplicates much of what these routines offer, so
just use the common code. For example ->irq_mode tracks what interrupt
mode was initialized, which duplicates the ->msix_enabled and
->msi_enabled handling in pcim_release.
This also adds a check to the return value of dma_async_device_register,
which can fail.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 9 Sep 2009 00:29:02 +0000 (17:29 -0700)]
ioat: move definitions to dma.h
Some of these defines may be useful outside of dma.c and the header is
private so there are no namespace pollution concerns.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Tue, 8 Sep 2009 21:32:24 +0000 (14:32 -0700)]
Merge commit 'v2.6.31-rc1' into dmaengine
Dan Williams [Tue, 28 Jul 2009 21:32:12 +0000 (14:32 -0700)]
ioat: move to drivers/dma/ioat/
When first created the ioat driver was the only inhabitant of
drivers/dma/. Now, it is the only multi-file (more than a .c and a .h)
driver in the directory. Moving it to an ioat/ subdirectory allows the
naming convention to be cleaned up, and allows for future splitting of
the source files by hardware version (v1, v2, and v3).
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Nicolas Ferre [Wed, 22 Jul 2009 18:04:45 +0000 (20:04 +0200)]
dmaengine: at_hdmac: add DMA slave transfers
This patch for at_hdmac adds the slave transfers capability to the Atmel DMA
controller available on some AT91 SOCs. This allow peripheral to memory and
memory to peripheral transfers with hardware handshaking.
Slave structure for controller specific information is passed through channel
private data. This at_dma_slave structure is defined in at_hdmac.h header file
and relative hardware definition are moved to this file from at_hdmac_regs.h.
Doing this we allow the channel configuration from platform definition code.
This work is intensively based on dw_dmac and several slave implementations.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Nicolas Ferre [Fri, 3 Jul 2009 17:24:33 +0000 (19:24 +0200)]
dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller
This AHB DMA Controller (aka HDMA or DMAC on AT91 systems) is availlable on
at91sam9rl chip. It will be used on other products in the future.
This first release covers only the memory-to-memory tranfer type. This is the
only tranfer type supported by this chip. On other products, it will be used
also for peripheral DMA transfer (slave API support to come).
I used dmatest client without problem in different configurations to test it.
Full documentation for this controller can be found in the SAM9RL datasheet:
http://www.atmel.com/dyn/products/product_card.asp?part_id=4243
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Nicolas Ferre [Mon, 6 Jul 2009 16:19:44 +0000 (18:19 +0200)]
dmaengine: dmatest: correct thread_count while using multiple thread per channel
It seems that thread_count is not properly calculated in dmatest.
In fact the thread count number that is returned from dmatest_add_threads() is
not correctly added to the thread_count and thus not properly printed.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Nicolas Ferre [Fri, 3 Jul 2009 17:26:51 +0000 (19:26 +0200)]
dmaengine: dmatest: add a maximum number of test iterations
The dmatest usually waits for the killing of its kthreads to stop
running tests. This patch adds a parameter that sets a maximum
number of test iterations.
This feature is quite interesting for debugging when you set a lot of
traces in your dmaengine controller driver.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Joe Perches [Sun, 28 Jun 2009 16:26:21 +0000 (09:26 -0700)]
drivers/dma: Remove unnecessary semicolons
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Joe Perches [Sun, 28 Jun 2009 16:26:20 +0000 (09:26 -0700)]
drivers/dma/fsldma.c: Remove unnecessary semicolons
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 1 Jul 2009 23:12:53 +0000 (16:12 -0700)]
dmaengine: move HIGHMEM64G restriction to ASYNC_TX_DMA
On HIGHMEM64G systems dma_addr_t is known to be larger than (void *)
which precludes async_xor from performing dma address conversions by
reusing the input parameter address list. However, other parts of the
dmaengine infrastructure do not suffer this constraint, so the
HIGHMEM64G restriction can be down-levelled.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Linus Torvalds [Wed, 24 Jun 2009 23:25:37 +0000 (16:25 -0700)]
Linux 2.6.31-rc1
Linus Torvalds [Wed, 24 Jun 2009 23:23:03 +0000 (16:23 -0700)]
Revert "PCI: use ACPI _CRS data by default"
This reverts commit
9e9f46c44e487af0a82eb61b624553e2f7118f5b.
Quoting from the commit message:
"At this point, it seems to solve more problems than it causes, so let's
try using it by default. It's an easy revert if it ends up causing
trouble."
And guess what? The _CRS code causes trouble.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 24 Jun 2009 21:35:57 +0000 (14:35 -0700)]
Merge git://git.infradead.org/battery-2.6
* git://git.infradead.org/battery-2.6:
da9030_battery: Fix race between event handler and monitor
Add MAX17040 Fuel Gauge driver
w1: ds2760_battery: add support for sleep mode feature
w1: ds2760: add support for EEPROM read and write
ds2760_battery: cleanups in ds2760_battery_probe()
Linus Torvalds [Wed, 24 Jun 2009 21:17:14 +0000 (14:17 -0700)]
Merge branches 'for-linus' of git://git./linux/kernel/git/viro/{vfs-2.6,audit-current}
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
another race fix in jfs_check_acl()
Get "no acls for this inode" right, fix shmem breakage
inline functions left without protection of ifdef (acl)
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
audit: inode watches depend on CONFIG_AUDIT not CONFIG_AUDIT_SYSCALL
Al Viro [Wed, 24 Jun 2009 21:02:42 +0000 (17:02 -0400)]
another race fix in jfs_check_acl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 24 Jun 2009 20:58:48 +0000 (16:58 -0400)]
Get "no acls for this inode" right, fix shmem breakage
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Eric Paris [Wed, 24 Jun 2009 20:09:01 +0000 (16:09 -0400)]
audit: inode watches depend on CONFIG_AUDIT not CONFIG_AUDIT_SYSCALL
Even though one cannot make use of the audit watch code without
CONFIG_AUDIT_SYSCALL the spaghetti nature of the audit code means that
the audit rule filtering requires that it at least be compiled.
Thus build the audit_watch code when we build auditfilter like it was
before
cfcad62c74abfef83762dc05a556d21bdf3980a2
Clearly this is a point of potential future cleanup..
Reported-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Markus Trippelsdorf [Wed, 24 Jun 2009 20:28:52 +0000 (22:28 +0200)]
inline functions left without protection of ifdef (acl)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Wed, 24 Jun 2009 20:33:19 +0000 (13:33 -0700)]
Merge branch 'futexes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
futex: Fix the write access fault problem for real
Thomas Gleixner [Thu, 11 Jun 2009 21:15:43 +0000 (23:15 +0200)]
futex: Fix the write access fault problem for real
commit
64d1304a64 (futex: setup writeable mapping for futex ops which
modify user space data) did address only half of the problem of write
access faults.
The patch was made on two wrong assumptions:
1) access_ok(VERIFY_WRITE,...) would actually check write access.
On x86 it does _NOT_. It's a pure address range check.
2) a RW mapped region can not go away under us.
That's wrong as well. Nobody can prevent another thread to call
mprotect(PROT_READ) on that region where the futex resides. If that
call hits between the get_user_pages_fast() verification and the
actual write access in the atomic region we are toast again.
The solution is to not rely on access_ok and get_user() for any write
access related fault on private and shared futexes. Instead we need to
fault it in with verification of write access.
There is no generic non destructive write mechanism which would fault
the user page in trough a #PF, but as we already know that we will
fault we can as well call get_user_pages() directly and avoid the #PF
overhead.
If get_user_pages() returns -EFAULT we know that we can not fix it
anymore and need to bail out to user space.
Remove a bunch of confusing comments on this issue as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org
Pekka Enberg [Wed, 24 Jun 2009 18:59:51 +0000 (21:59 +0300)]
SLUB: Don't pass __GFP_FAIL for the initial allocation
SLUB uses higher order allocations by default but falls back to small
orders under memory pressure. Make sure the GFP mask used in the initial
allocation doesn't include __GFP_NOFAIL.
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 24 Jun 2009 19:16:49 +0000 (12:16 -0700)]
Don't warn about order-1 allocations with __GFP_NOFAIL
Traditionally, we never failed small orders (even regardless of any
__GFP_NOFAIL flags), and slab will allocate order-1 allocations even for
small allocations that could fit in a single page (in order to avoid
excessive fragmentation).
Maybe we should remove this warning entirely, but before making that
judgement, at least limit it to bigger allocations.
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 24 Jun 2009 17:47:38 +0000 (10:47 -0700)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
Staging: octeon-ethernet: Fix race freeing transmit buffers.
Staging: octeon-ethernet: Convert to use net_device_ops.
MIPS: Cavium: Add CPU hotplugging code.
MIPS: SMP: Allow suspend and hibernation if CPU hotplug is available
MIPS: Add arch generic CPU hotplug
DMA: txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE set
MIPS: Sibyte: Fix build error if CONFIG_SERIAL_SB1250_DUART is undefined.
MIPS: MIPSsim: Fix build error if MSC01E_INT_BASE is undefined.
MIPS: Hibernation: Remove SMP TLB and cacheflushing code.
MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.
MIPS: bug.h Build fix - include <linux/compiler.h>.
David Daney [Tue, 23 Jun 2009 23:20:56 +0000 (16:20 -0700)]
Staging: octeon-ethernet: Fix race freeing transmit buffers.
The existing code had the following race:
Thread-1 Thread-2
inc/read in_use
inc/read in_use
inc tx_free_list[qos].len
inc tx_free_list[qos].len
The actual in_use value was incremented twice, but thread-1 is going
to free memory based on its stale value, and will free one too many
times. The result is that memory is freed back to the kernel while
its packet is still in the transmit buffer. If the memory is
overwritten before it is transmitted, the hardware will put a valid
checksum on it and send it out (just like it does with good packets).
If by chance the TCP flags are clobbered but not the addresses or
ports, the result can be a broken TCP stream.
The fix is to track the number of freed packets in a single location
(a Fetch-and-Add Unit register). That way it can never get out of sync
with itself.
We try to free up to MAX_SKB_TO_FREE (currently 10) buffers at a time.
If fewer are available we adjust the free count with the difference.
The action of claiming buffers to free is atomic so two threads cannot
claim the same buffers.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Tue, 23 Jun 2009 18:34:08 +0000 (11:34 -0700)]
Staging: octeon-ethernet: Convert to use net_device_ops.
Convert the driver to use net_device_ops as it is now mandatory.
Also compensate for the removal of struct sk_buff's dst field.
The changes are mostly mechanical, the content of ethernet-common.c
was moved to ethernet.c and ethernet-common.{c,h} are removed.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 23 Jun 2009 09:36:38 +0000 (10:36 +0100)]
MIPS: Cavium: Add CPU hotplugging code.
Thanks to Cavium Inc. for the code contribution and help.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 23 Jun 2009 09:20:56 +0000 (10:20 +0100)]
MIPS: SMP: Allow suspend and hibernation if CPU hotplug is available
The SMP implementation of suspend and hibernate depends on CPU hotplugging.
In the past we didn't have CPU hotplug so suspend and hibernation were not
possible on SMP systems.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 23 Jun 2009 09:00:31 +0000 (10:00 +0100)]
MIPS: Add arch generic CPU hotplug
Each platform has to add support for CPU hotplugging itself by providing
suitable definitions for the cpu_disable and cpu_die of the smp_ops
methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set
SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the
necessary changes. This patch contains the changes to the dummy smp_ops
definition for uni-processor systems.
Parts of the code contributed by Cavium Inc.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Atsushi Nemoto [Wed, 17 Jun 2009 20:08:31 +0000 (13:08 -0700)]
DMA: txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE set
This patch does not change actual behaviour since dma_unmap_page is just
an alias of dma_unmap_single on MIPS.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Mon, 22 Jun 2009 15:17:52 +0000 (16:17 +0100)]
MIPS: Sibyte: Fix build error if CONFIG_SERIAL_SB1250_DUART is undefined.
This fixes kernel.org bugzilla 13596, see
http://bugzilla.kernel.org/show_bug.cgi?id=13596
Reported-by: dvice_null@yahoo.com
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Mon, 22 Jun 2009 14:48:27 +0000 (15:48 +0100)]
MIPS: MIPSsim: Fix build error if MSC01E_INT_BASE is undefined.
This fixes kernel.org bugzilla 13595, see
http://bugzilla.kernel.org/show_bug.cgi?id=13595
Reported-by: dvice_null@yahoo.com
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Fri, 19 Jun 2009 14:01:44 +0000 (15:01 +0100)]
MIPS: Hibernation: Remove SMP TLB and cacheflushing code.
We can't perform any flushes on SMP from swsusp_arch_resume because
interrupts are disabled. A cross-CPU flush is unnecessary anyway
because all but the local CPU have already been disabled. A local
flush is not needed either because we didn't change any mappings. So
just delete the code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Fri, 19 Jun 2009 13:05:26 +0000 (14:05 +0100)]
MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.
Some of the were relying into smp.h being dragged in by another header
which of course is fragile. <asm/cpu-info.h> uses smp_processor_id()
only in macros and including smp.h there leads to an include loop, so
don't change cpu-info.h.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Fri, 19 Jun 2009 12:51:28 +0000 (13:51 +0100)]
MIPS: bug.h Build fix - include <linux/compiler.h>.
In the past this file somehow used to be dragged in.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds [Wed, 24 Jun 2009 17:26:54 +0000 (10:26 -0700)]
Merge git://git./linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (48 commits)
dm mpath: change to be request based
dm: disable interrupt when taking map_lock
dm: do not set QUEUE_ORDERED_DRAIN if request based
dm: enable request based option
dm: prepare for request based option
dm raid1: add userspace log
dm: calculate queue limits during resume not load
dm log: fix create_log_context to use logical_block_size of log device
dm target:s introduce iterate devices fn
dm table: establish queue limits by copying table limits
dm table: replace struct io_restrictions with struct queue_limits
dm table: validate device logical_block_size
dm table: ensure targets are aligned to logical_block_size
dm ioctl: support cookies for udev
dm: sysfs add suspended attribute
dm table: improve warning message when devices not freed before destruction
dm mpath: add service time load balancer
dm mpath: add queue length load balancer
dm mpath: add start_io and nr_bytes to path selectors
dm snapshot: use barrier when writing exception store
...
Linus Torvalds [Wed, 24 Jun 2009 17:26:24 +0000 (10:26 -0700)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/dvrabel/uwb
* 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb:
uwb: allow WLP to be used with IPv6.
uwb: event_size should be signed
Linus Torvalds [Wed, 24 Jun 2009 17:22:57 +0000 (10:22 -0700)]
Merge branch 'audit.b63' of git://git./linux/kernel/git/viro/audit-current
* 'audit.b63' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
Fix rule eviction order for AUDIT_DIR
Audit: clean up all op= output to include string quoting
Audit: move audit_get_nd completely into audit_watch
audit: seperate audit inode watches into a subfile
Audit: clean up audit_receive_skb
Audit: cleanup netlink mesg handling
Audit: unify the printk of an skb when auditd not around
Audit: dereferencing krule as if it were an audit_watch
Audit: better estimation of execve record length
Audit: fix audit watch use after free
Jesper Nilsson [Wed, 24 Jun 2009 07:33:19 +0000 (09:33 +0200)]
MAINTAINERS: Change mailing list info for CRIS
Posting to the dev-etrax mailing list is only allowed for subscribers,
and the list is more geared toward user applications than kernel
developers.
Change to newly created mailing list for CRIS.
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 24 Jun 2009 17:17:07 +0000 (10:17 -0700)]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (72 commits)
asus-laptop: remove EXPERIMENTAL dependency
asus-laptop: use pr_fmt and pr_<level>
eeepc-laptop: cpufv updates
eeepc-laptop: sync eeepc-laptop with asus_acpi
asus_acpi: Deprecate in favor of asus-laptop
acpi4asus: update MAINTAINER and KConfig links
asus-laptop: platform dev as parent for led and backlight
eeepc-laptop: enable camera by default
ACPI: Rename ACPI processor device bus ID
acerhdf: Acer Aspire One fan control
ACPI: video: DMI workaround broken Acer 7720 BIOS enabling display brightness
ACPI: run ACPI device hot removal in kacpi_hotplug_wq
ACPI: Add the reference count to avoid unloading ACPI video bus twice
ACPI: DMI to disable Vista compatibility on some Sony laptops
ACPI: fix a deadlock in hotplug case
Show the physical device node of backlight class device.
ACPI: pdc init related memory leak with physical CPU hotplug
ACPI: pci_root: remove unused dev/fn information
ACPI: pci_root: simplify list traversals
ACPI: pci_root: use driver data rather than list lookup
...
Linus Torvalds [Wed, 24 Jun 2009 17:03:12 +0000 (10:03 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (23 commits)
switch xfs to generic acl caching helpers
helpers for acl caching + switch to those
switch shmem to inode->i_acl
switch reiserfs to inode->i_acl
switch reiserfs to usual conventions for caching ACLs
reiserfs: minimal fix for ACL caching
switch nilfs2 to inode->i_acl
switch btrfs to inode->i_acl
switch jffs2 to inode->i_acl
switch jfs to inode->i_acl
switch ext4 to inode->i_acl
switch ext3 to inode->i_acl
switch ext2 to inode->i_acl
add caching of ACLs in struct inode
fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls
cleanup __writeback_single_inode
... and the same for vfsmount id/mount group id
Make allocation of anon devices cheaper
update Documentation/filesystems/Locking
devpts: remove module-related code
...
Linus Torvalds [Wed, 24 Jun 2009 17:01:12 +0000 (10:01 -0700)]
Merge git://git./linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6:
bnx2: Fix the behavior of ethtool when ONBOOT=no
qla3xxx: Don't sleep while holding lock.
qla3xxx: Give the PHY time to come out of reset.
ipv4 routing: Ensure that route cache entries are usable and reclaimable with caching is off
net: Move rx skb_orphan call to where needed
ipv6: Use correct data types for ICMPv6 type and code
net: let KS8842 driver depend on HAS_IOMEM
can: let SJA1000 driver depend on HAS_IOMEM
netxen: fix firmware init handshake
netxen: fix build with without CONFIG_PM
netfilter: xt_rateest: fix comparison with self
netfilter: xt_quota: fix incomplete initialization
netfilter: nf_log: fix direct userspace memory access in proc handler
netfilter: fix some sparse endianess warnings
netfilter: nf_conntrack: fix conntrack lookup race
netfilter: nf_conntrack: fix confirmation race condition
netfilter: nf_conntrack: death_by_timeout() fix
Linus Torvalds [Wed, 24 Jun 2009 16:57:10 +0000 (09:57 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-udf-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6:
udf: remove redundant tests on unsigned
udf: Use device size when drive reported bogus number of written blocks
Chuck Ebbert [Wed, 24 Jun 2009 17:35:13 +0000 (18:35 +0100)]
Remove low_latency flag setting from nozomi and mxser drivers
The kernel oopses if this flag is set.
[and neither driver should set it as they call tty_flip_buffer_push from IRQ
paths so have always been buggy]
Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Wed, 24 Jun 2009 17:35:05 +0000 (18:35 +0100)]
tty: fix tty_port_block_til_ready waiting
Since commit
3e3b5c087799e536871c8261b05bc28e4783c8da ("tty: use
prepare/finish_wait"), tty_port_block_til_ready() is using
prepare_to_wait()/finish_wait(). Those functions require that the
wait_queue_t be initialised with .func=autoremove_wake_function, via
DEFINE_WAIT().
But the conversion from DECLARE_WAITQUEUE() to DEFINE_WAIT() was not made,
so this code will oops in finish_wait().
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arjan van de Ven [Wed, 24 Jun 2009 17:34:58 +0000 (18:34 +0100)]
pci: use pci_ioremap_bar() in drivers/serial
Use the newly introduced pci_ioremap_bar() function in drivers/serial.
pci_ioremap_bar() just takes a pci device and a bar number, with the goal
of making it really hard to get wrong, while also having a central place
to stick sanity checks.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Paul Fulghum [Wed, 24 Jun 2009 17:34:51 +0000 (18:34 +0100)]
synclink_gt: fix transmit race and timeout
Fix race condition when adding transmit data to active DMA buffer ring
that can cause transmit stall.
Update transmit timeout when adding data to active DMA buffer ring.
Base transmit timeout on amount of buffered data instead of using fixed
value.
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Wed, 24 Jun 2009 17:34:43 +0000 (18:34 +0100)]
jsm: clean up "serial: jsm: correctly support 4 8 port boards"
Remove unneeded casts.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Atsushi Nemoto [Wed, 24 Jun 2009 17:34:34 +0000 (18:34 +0100)]
kgdb: kgdboc console poll hooks for serial_txx9 uart
Implement the serial polling hooks for the serial_txx9 uart for use with
kgdboc.
This patch once got SOB from Jason on Jul 2008 and (perhaps) merged into
kgdb-next branch, but lost somewhere then. I resend it now with Jason's
Acked-by.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Al Viro [Tue, 9 Jun 2009 17:29:39 +0000 (13:29 -0400)]
switch xfs to generic acl caching helpers
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 9 Jun 2009 16:11:54 +0000 (12:11 -0400)]
helpers for acl caching + switch to those
helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl),
forget_cached_acl(inode, type).
ubifs/xattr.c needed includes reordered, the rest is a plain switchover.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:56:00 +0000 (19:56 -0400)]
switch shmem to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 9 Jun 2009 01:07:04 +0000 (21:07 -0400)]
switch reiserfs to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 9 Jun 2009 01:01:13 +0000 (21:01 -0400)]
switch reiserfs to usual conventions for caching ACLs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 9 Jun 2009 00:46:54 +0000 (20:46 -0400)]
reiserfs: minimal fix for ACL caching
reiserfs uses NULL as "unknown" and ERR_PTR(-ENODATA) as "no ACL";
several codepaths store the former instead of the latter.
All those codepaths go through iset_acl() and all cases when it's
called with NULL acl are for the second variety, so the minimal
fix is to teach iset_acl() to deal with that.
Proper fix is to switch to more usual conventions and avoid back
and forth between internally used ERR_PTR(-ENODATA) and NULL
expected by the rest of the kernel.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:56:34 +0000 (19:56 -0400)]
switch nilfs2 to inode->i_acl
Actually, get rid of private analog, since nothing in there is
using ACLs at all so far.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:55:32 +0000 (19:55 -0400)]
switch btrfs to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:55:12 +0000 (19:55 -0400)]
switch jffs2 to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:54:52 +0000 (19:54 -0400)]
switch jfs to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:54:26 +0000 (19:54 -0400)]
switch ext4 to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:53:58 +0000 (19:53 -0400)]
switch ext3 to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:52:55 +0000 (19:52 -0400)]
switch ext2 to inode->i_acl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 8 Jun 2009 23:50:45 +0000 (19:50 -0400)]
add caching of ACLs in struct inode
No helpers, no conversions yet.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Ankit Jain [Fri, 19 Jun 2009 18:28:07 +0000 (14:28 -0400)]
fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls
This patch adds ioctls to vfs for compatibility with legacy XFS
pre-allocation ioctls (XFS_IOC_*RESVP*). The implementation
effectively invokes sys_fallocate for the new ioctls.
Also handles the compat_ioctl case.
Note: These legacy ioctls are also implemented by OCFS2.
[AV: folded fixes from hch]
Signed-off-by: Ankit Jain <me@ankitjain.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Christoph Hellwig [Mon, 8 Jun 2009 11:35:40 +0000 (13:35 +0200)]
cleanup __writeback_single_inode
There is no reason to for the split between __writeback_single_inode and
__sync_single_inode, the former just does a couple of checks before
tail-calling the latter. So merge the two, and while we're at it split
out the I_SYNC waiting case for data integrity writers, as it's
logically separate function. Finally rename __writeback_single_inode to
writeback_single_inode.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 24 Jun 2009 07:12:00 +0000 (03:12 -0400)]
... and the same for vfsmount id/mount group id
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 24 Jun 2009 06:05:18 +0000 (02:05 -0400)]
Make allocation of anon devices cheaper
Standard trick - add a new variable (start) such that
for each n < start n is known to be busy. Allocation can
skip checking everything in [0..start) and if it returns
n, we can set start to n + 1. Freeing below start sets
start to what we'd just freed.
Of course, it still sucks if we do something like
free 0
allocate
allocate
in a loop - still O(n^2) time. However, on saner loads it
improves the things a lot and the entire thing is not worth
the trouble of switching to something with better worst-case
behaviour.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Christoph Hellwig [Fri, 19 Jun 2009 18:22:37 +0000 (20:22 +0200)]
update Documentation/filesystems/Locking
The rules for locking in many superblock operations has changed
significantly, so update the documentation for it. Also correct some
older updates and ommissions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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