Christoph Lameter [Tue, 14 Dec 2010 16:28:46 +0000 (10:28 -0600)]
vmstat: User per cpu atomics to avoid interrupt disable / enable
Currently the operations to increment vm counters must disable interrupts
in order to not mess up their housekeeping of counters.
So use this_cpu_cmpxchg() to avoid the overhead. Since we can no longer
count on preremption being disabled we still have some minor issues.
The fetching of the counter thresholds is racy.
A threshold from another cpu may be applied if we happen to be
rescheduled on another cpu. However, the following vmstat operation
will then bring the counter again under the threshold limit.
The operations for __xxx_zone_state are not changed since the caller
has taken care of the synchronization needs (and therefore the cycle
count is even less than the optimized version for the irq disable case
provided here).
The optimization using this_cpu_cmpxchg will only be used if the arch
supports efficient this_cpu_ops (must have CONFIG_CMPXCHG_LOCAL set!)
The use of this_cpu_cmpxchg reduces the cycle count for the counter
operations by %80 (inc_zone_page_state goes from 170 cycles to 32).
Signed-off-by: Christoph Lameter <cl@linux.com>
Christoph Lameter [Tue, 14 Dec 2010 16:28:45 +0000 (10:28 -0600)]
irq_work: Use per cpu atomics instead of regular atomics
The irq work queue is a per cpu object and it is sufficient for
synchronization if per cpu atomics are used. Doing so simplifies
the code and reduces the overhead of the code.
Before:
christoph@linux-2.6$ size kernel/irq_work.o
text data bss dec hex filename
451 8 1 460 1cc kernel/irq_work.o
After:
christoph@linux-2.6$ size kernel/irq_work.o
text data bss dec hex filename
438 8 1 447 1bf kernel/irq_work.o
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Christoph Lameter <cl@linux.com>
Tejun Heo [Sat, 18 Dec 2010 14:54:36 +0000 (15:54 +0100)]
Merge branch 'this_cpu_ops' into for-2.6.38
Christoph Lameter [Tue, 14 Dec 2010 16:28:47 +0000 (10:28 -0600)]
cpuops: Use cmpxchg for xchg to avoid lock semantics
Use cmpxchg instead of xchg to realize this_cpu_xchg.
xchg will cause LOCK overhead since LOCK is always implied but cmpxchg
will not.
Baselines:
xchg() = 18 cycles (no segment prefix, LOCK semantics)
__this_cpu_xchg = 1 cycle
(simulated using this_cpu_read/write, two prefixes. Looks like the
cpu can use loop optimization to get rid of most of the overhead)
Cycles before:
this_cpu_xchg = 37 cycles (segment prefix and LOCK (implied by xchg))
After:
this_cpu_xchg = 11 cycle (using cmpxchg without lock semantics)
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Tue, 14 Dec 2010 16:28:44 +0000 (10:28 -0600)]
x86: this_cpu_cmpxchg and this_cpu_xchg operations
Provide support as far as the hardware capabilities of the x86 cpus
allow.
Define CONFIG_CMPXCHG_LOCAL in Kconfig.cpu to allow core code to test for
fast cpuops implementations.
V1->V2:
- Take out the definition for this_cpu_cmpxchg_8 and move it into
a separate patch.
tj: - Reordered ops to better follow this_cpu_* organization.
- Renamed macro temp variables similar to their existing
neighbours.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Sat, 18 Dec 2010 14:54:04 +0000 (15:54 +0100)]
percpu: Generic this_cpu_cmpxchg() and this_cpu_xchg support
Generic code to provide new per cpu atomic features
this_cpu_cmpxchg
this_cpu_xchg
Fallback occurs to functions using interrupts disable/enable
to ensure correct per cpu atomicity.
Fallback to regular cmpxchg and xchg is not possible since per cpu atomic
semantics include the guarantee that the current cpus per cpu data is
accessed atomically. Use of regular cmpxchg and xchg requires the
determination of the address of the per cpu data before regular cmpxchg
or xchg which therefore cannot be atomically included in an xchg or
cmpxchg without segment override.
tj: - Relocated new ops to conform better to the general organization.
- This patch contains a trivial comment fix.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Tejun Heo [Fri, 17 Dec 2010 14:47:04 +0000 (15:47 +0100)]
percpu,x86: relocate this_cpu_add_return() and friends
- include/linux/percpu.h: this_cpu_add_return() and friends were
located next to __this_cpu_add_return(). However, the overall
organization is to first group by preemption safeness. Relocate
this_cpu_add_return() and friends to preemption-safe area.
- arch/x86/include/asm/percpu.h: Relocate percpu_add_return_op() after
other more basic operations. Relocate [__]this_cpu_add_return_8()
so that they're first grouped by preemption safeness.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Christoph Lameter [Wed, 8 Dec 2010 16:42:23 +0000 (17:42 +0100)]
connector: Use this_cpu operations
The patch was originally in the use cpuops patchset but it needs an
inc_return and is therefore dependent on an extension of the cpu ops.
Fixed up and verified that it compiles.
get_seq can benefit from this_cpu_operations. Address calculation is
avoided and the increment is done using an xadd.
Cc: Scott James Remnant <scott@ubuntu.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:40:07 +0000 (11:40 -0600)]
xen: Use this_cpu_inc_return
__this_cpu_inc_return reduces code and simplifies code.
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Christoph Lameter [Wed, 8 Dec 2010 16:42:22 +0000 (17:42 +0100)]
taskstats: Use this_cpu_ops
Use this_cpu_inc_return in one place and avoid ugly __raw_get_cpu in
another.
V3->V4:
- Fix off by one.
V4-V4f:
- Use &listener_array
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:40:06 +0000 (11:40 -0600)]
random: Use this_cpu_inc_return
__this_cpu_inc can create a single instruction to do the same as
__get_cpu_var()++.
Cc: Richard Kennedy <richard@rsk.demon.co.uk>
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:40:05 +0000 (11:40 -0600)]
fs: Use this_cpu_inc_return in buffer.c
__this_cpu_inc can create a single instruction with the same effect
as the _get_cpu_var(..)++ construct in buffer.c.
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:40:03 +0000 (11:40 -0600)]
highmem: Use this_cpu_xx_return() operations
Use this_cpu operations to optimize access primitives for highmem.
The main effect is the avoidance of address calculations through the
use of a segment prefix.
V3->V4
- kmap_atomic_idx: Do not return a value.
- Use __this_cpu_dec without HIGHMEM_DEBUG
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:40:02 +0000 (11:40 -0600)]
vmstat: Use this_cpu_inc_return for vm statistics
this_cpu_inc_return() saves us a memory access there. Code
size does not change.
V1->V2:
- Fixed the location of the __per_cpu pointer attributes
- Sparse checked
V2->V3:
- Move fixes to __percpu attribute usage to earlier patch
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Tejun Heo [Fri, 17 Dec 2010 14:16:46 +0000 (15:16 +0100)]
Merge branch 'this_cpu_ops' into for-2.6.38
Christoph Lameter [Mon, 6 Dec 2010 17:40:00 +0000 (11:40 -0600)]
x86: Support for this_cpu_add, sub, dec, inc_return
Supply an implementation for x86 in order to generate more efficient code.
V2->V3:
- Cleanup
- Remove strange type checking from percpu_add_return_op.
tj: - Dropped unused typedef from percpu_add_return_op().
- Renamed ret__ to paro_ret__ in percpu_add_return_op().
- Minor indentation adjustments.
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:39:59 +0000 (11:39 -0600)]
percpu: Generic support for this_cpu_add, sub, dec, inc_return
Introduce generic support for this_cpu_add_return etc.
The fallback is to realize these operations with simpler __this_cpu_ops.
tj: - Reformatted __cpu_size_call_return2() to make it more consistent
with its neighbors.
- Dropped unnecessary temp variable ret__ from
__this_cpu_generic_add_return().
Reviewed-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Wed, 8 Dec 2010 15:22:55 +0000 (16:22 +0100)]
core: Replace __get_cpu_var with __this_cpu_read if not used for an address.
__get_cpu_var() can be replaced with this_cpu_read and will then use a
single read instruction with implied address calculation to access the
correct per cpu instance.
However, the address of a per cpu variable passed to __this_cpu_read()
cannot be determined (since it's an implied address conversion through
segment prefixes). Therefore apply this only to uses of __get_cpu_var
where the address of the variable is not used.
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Hugh Dickins <hughd@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:29 +0000 (11:16 -0600)]
xen: Use this_cpu_ops
Use this_cpu_ops to reduce code size and simplify things in various places.
V3->V4:
Move instance of this_cpu_inc_return to a later patchset so that
this patch can be applied without infrastructure changes.
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:28 +0000 (11:16 -0600)]
fs: Use this_cpu_xx operations in buffer.c
Optimize various per cpu area operations through these new percpu
operations. These operations avoid address calculations through the
use of segment prefixes and multiple memory references through RMW
instructions etc.
Reduces code size:
Before:
christoph@linux-2.6$ size fs/buffer.o
text data bss dec hex filename
19169 80 28 19277 4b4d fs/buffer.o
After:
christoph@linux-2.6$ size fs/buffer.o
text data bss dec hex filename
19138 80 28 19246 4b2e fs/buffer.o
V3->V4:
- Move the use of this_cpu_inc_return into a later patch so that
this one can go in without percpu infrastructure changes.
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:26 +0000 (11:16 -0600)]
fakekey: Simplify speakup_fake_key_pressed through this_cpu_ops
The whole function can be expressed as a simple this_cpu_read() operation.
The function overhead is now likely multiple times that of the single
instruction that is executed in it.
Sedat: fixed compile failure caused by an extra ')'.
Cc: William Hubbs <w.d.hubbs@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:25 +0000 (11:16 -0600)]
kprobes: Use this_cpu_ops
Use this_cpu ops in various places to optimize per cpu data access.
Cc: Jason Baron <jbaron@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:24 +0000 (11:16 -0600)]
drivers: Replace __get_cpu_var with __this_cpu_read if not used for an address.
__get_cpu_var() can be replaced with this_cpu_read and will then use a single
read instruction with implied address calculation to access the correct per cpu
instance.
However, the address of a per cpu variable passed to __this_cpu_read() cannot be
determed (since its an implied address conversion through segment prefixes).
Therefore apply this only to uses of __get_cpu_var where the addres of the
variable is not used.
V3->V4:
- Move one instance of this_cpu_inc_return to a later patch
so that this one can go in without percpu infrastructrure
changes.
Sedat: fixed compile failure caused by an extra ')'.
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:20 +0000 (11:16 -0600)]
vmstat: Optimize zone counter modifications through the use of this cpu operations
this cpu operations can be used to slightly optimize the function. The
changes will avoid some address calculations and replace them with the
use of the percpu segment register.
If one would have this_cpu_inc_return and this_cpu_dec_return then it
would be possible to optimize inc_zone_page_state and
dec_zone_page_state even more.
V1->V2:
- Fix __dec_zone_state overflow handling
- Use s8 variables for temporary storage.
V2->V3:
- Put __percpu annotations in correct places.
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Christoph Lameter [Mon, 6 Dec 2010 17:16:19 +0000 (11:16 -0600)]
percpucounter: Optimize __percpu_counter_add a bit through the use of this_cpu() options.
The this_cpu_* options can be used to optimize __percpu_counter_add a bit. Avoids
some address arithmetic and saves 12 bytes.
Before:
00000000000001d3 <__percpu_counter_add>:
1d3: 55 push %rbp
1d4: 48 89 e5 mov %rsp,%rbp
1d7: 41 55 push %r13
1d9: 41 54 push %r12
1db: 53 push %rbx
1dc: 48 89 fb mov %rdi,%rbx
1df: 48 83 ec 08 sub $0x8,%rsp
1e3: 4c 8b 67 30 mov 0x30(%rdi),%r12
1e7: 65 4c 03 24 25 00 00 add %gs:0x0,%r12
1ee: 00 00
1f0: 4d 63 2c 24 movslq (%r12),%r13
1f4: 48 63 c2 movslq %edx,%rax
1f7: 49 01 f5 add %rsi,%r13
1fa: 49 39 c5 cmp %rax,%r13
1fd: 7d 0a jge 209 <__percpu_counter_add+0x36>
1ff: f7 da neg %edx
201: 48 63 d2 movslq %edx,%rdx
204: 49 39 d5 cmp %rdx,%r13
207: 7f 1e jg 227 <__percpu_counter_add+0x54>
209: 48 89 df mov %rbx,%rdi
20c: e8 00 00 00 00 callq 211 <__percpu_counter_add+0x3e>
211: 4c 01 6b 18 add %r13,0x18(%rbx)
215: 48 89 df mov %rbx,%rdi
218: 41 c7 04 24 00 00 00 movl $0x0,(%r12)
21f: 00
220: e8 00 00 00 00 callq 225 <__percpu_counter_add+0x52>
225: eb 04 jmp 22b <__percpu_counter_add+0x58>
227: 45 89 2c 24 mov %r13d,(%r12)
22b: 5b pop %rbx
22c: 5b pop %rbx
22d: 41 5c pop %r12
22f: 41 5d pop %r13
231: c9 leaveq
232: c3 retq
After:
00000000000001d3 <__percpu_counter_add>:
1d3: 55 push %rbp
1d4: 48 63 ca movslq %edx,%rcx
1d7: 48 89 e5 mov %rsp,%rbp
1da: 41 54 push %r12
1dc: 53 push %rbx
1dd: 48 89 fb mov %rdi,%rbx
1e0: 48 8b 47 30 mov 0x30(%rdi),%rax
1e4: 65 44 8b 20 mov %gs:(%rax),%r12d
1e8: 4d 63 e4 movslq %r12d,%r12
1eb: 49 01 f4 add %rsi,%r12
1ee: 49 39 cc cmp %rcx,%r12
1f1: 7d 0a jge 1fd <__percpu_counter_add+0x2a>
1f3: f7 da neg %edx
1f5: 48 63 d2 movslq %edx,%rdx
1f8: 49 39 d4 cmp %rdx,%r12
1fb: 7f 21 jg 21e <__percpu_counter_add+0x4b>
1fd: 48 89 df mov %rbx,%rdi
200: e8 00 00 00 00 callq 205 <__percpu_counter_add+0x32>
205: 4c 01 63 18 add %r12,0x18(%rbx)
209: 48 8b 43 30 mov 0x30(%rbx),%rax
20d: 48 89 df mov %rbx,%rdi
210: 65 c7 00 00 00 00 00 movl $0x0,%gs:(%rax)
217: e8 00 00 00 00 callq 21c <__percpu_counter_add+0x49>
21c: eb 04 jmp 222 <__percpu_counter_add+0x4f>
21e: 65 44 89 20 mov %r12d,%gs:(%rax)
222: 5b pop %rbx
223: 41 5c pop %r12
225: c9 leaveq
226: c3 retq
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Reviewed-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Tejun Heo [Fri, 10 Dec 2010 16:02:49 +0000 (17:02 +0100)]
MAINTAINERS: Add percpu allocator entry
Add me and Christoph Lameter as maintainers for the percpu memory
allocator.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Linus Torvalds [Thu, 16 Dec 2010 23:45:49 +0000 (15:45 -0800)]
Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify
* 'for-linus' of git://git.infradead.org/users/eparis/notify:
fanotify: fill in the metadata_len field on struct fanotify_event_metadata
fanotify: split version into version and metadata_len
fanotify: Dont try to open a file descriptor for the overflow event
fanotify: Introduce FAN_NOFD
fanotify: do not leak user reference on allocation failure
inotify: stop kernel memory leak on file creation failure
fanotify: on group destroy allow all waiters to bypass permission check
fanotify: Dont allow a mask of 0 if setting or removing a mark
fanotify: correct broken ref counting in case adding a mark failed
fanotify: if set by user unset FMODE_NONOTIFY before fsnotify_perm() is called
fanotify: remove packed from access response message
fanotify: deny permissions when no event was sent
Linus Torvalds [Thu, 16 Dec 2010 23:45:25 +0000 (15:45 -0800)]
Merge branch 'upstream' of git://git.linux-mips.org/upstream-linus
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (28 commits)
MIPS: Add a CONFIG_FORCE_MAX_ZONEORDER Kconfig option.
MIPS: LD/SD o32 macro GAS fix update
MIPS: Alchemy: fix build with SERIAL_8250=n
MIPS: Rename mips_dma_cache_sync back to dma_cache_sync
MIPS: MT: Fix typo in comment.
SSB: Fix nvram_get on BCM47xx platform
MIPS: BCM47xx: Swap serial console if ttyS1 was specified.
MIPS: BCM47xx: Use sscanf for parsing mac address
MIPS: BCM47xx: Fill values for b43 into SSB sprom
MIPS: BCM47xx: Do not read config from CFE
MIPS: FDT size is a be32
MIPS: Fix CP0 COUNTER clockevent race
MIPS: Fix regression on BCM4710 processor detection
MIPS: JZ4740: Fix pcm device name
MIPS: Separate two consecutive loads in memset.S
MIPS: Send proper signal and siginfo on FP emulator faults.
MIPS: AR7: Fix loops per jiffies on TNETD7200 devices
MIPS: AR7: Fix double ar7_gpio_init declaration
MIPS: Rework GENERIC_HARDIRQS Kconfig.
MIPS: Alchemy: Add return value check for strict_strtoul()
...
David Daney [Mon, 11 Oct 2010 21:52:45 +0000 (14:52 -0700)]
MIPS: Add a CONFIG_FORCE_MAX_ZONEORDER Kconfig option.
For huge page support with base page size of 16K or 32K, we have to
increase the MAX_ORDER so that huge pages can be allocated.
[Ralf: I don't think a user should have to configure obscure constants like
this but for the time being this will have to suffice.]
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1685/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Maciej W. Rozycki [Sun, 10 Oct 2010 09:42:12 +0000 (10:42 +0100)]
MIPS: LD/SD o32 macro GAS fix update
I am about to commit:
http://sourceware.org/ml/binutils/2010-10/msg00033.html
that fixes a problem with the LD/SD macro currently implemented by GAS for
the o32 ABI in an inconsistent way. This is best illustrated with a
simple program, which I'm copying here from the message above for easier
reference:
$ cat ld.s
ld $5,32767($4)
ld $5,32768($4)
This gets assebled into the following output:
$ mips-linux-as -32 -mips3 -o ld.o ld.s
$ mips-linux-objdump -d ld.o
ld.o: file format elf32-tradbigmips
Disassembly of section .text:
00000000 <.text>:
0:
dc857fff ld a1,32767(a0)
4:
3c010001 lui at,0x1
8:
00810821 addu at,a0,at
c:
8c258000 lw a1,-32768(at)
10:
8c268004 lw a2,-32764(at)
...
Oops!
The GAS fix makes the macro behave in a consistent way and pairs of LW/SW
instructions to be output as appropriate regardless of the size of the
offset associated with the address used. The machine instruction is still
available, but to reach it macros have to be disabled first. This has a
side effect of requiring the use of a machine-addressable memory operand.
As some platforms require 64-bit operations for accesses to some I/O
registers LD/SD instructions are used in a couple of places in Linux
regardless of the ABI selected. Here's a fix for some pieces of code
affected I've been able to track down. The fix should be backwards
compatible with all supported binutils releases in existence and can be
used as a reference for any other places or off-tree code. The use of the
"R" constraint guarantees a machine-addressable operand.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1680/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Manuel Lauss [Mon, 25 Oct 2010 16:44:11 +0000 (18:44 +0200)]
MIPS: Alchemy: fix build with SERIAL_8250=n
In commit
7d172bfe ("Alchemy: Add UART PM methods") I introduced
platform PM methods which call a function of the 8250 driver;
this patch works around link failures when the kernel is built
without 8250 support.
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/1737/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Thu, 9 Dec 2010 19:14:09 +0000 (19:14 +0000)]
MIPS: Rename mips_dma_cache_sync back to dma_cache_sync
This fixes IP22 and IP28 build errors.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Wed, 1 Dec 2010 17:33:17 +0000 (17:33 +0000)]
MIPS: MT: Fix typo in comment.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hauke Mehrtens [Sat, 27 Nov 2010 18:26:32 +0000 (19:26 +0100)]
SSB: Fix nvram_get on BCM47xx platform
The nvram_get function was never in the mainline kernel, it only existed in
an external OpenWrt patch. Use nvram_getenv function, which is in mainline
and use an include instead of an extra function declaration. et0macaddr
contains the mac address in text from like 00:11:22:33:44:55. We have to
parse it before adding it into macaddr.
nvram_parse_macaddr will be merged into asm/mach-bcm47xx/nvram.h through
the MIPS git tree and will be available soon. It will not build now without
nvram_parse_macaddr, but it hasn't before either.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: mb@bu3sch.de
Cc: netdev@vger.kernel.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Michael Buesch <mb@bu3sch.de>
Patchwork: https://patchwork.linux-mips.org/patch/1849/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hauke Mehrtens [Sat, 27 Nov 2010 16:46:01 +0000 (17:46 +0100)]
MIPS: BCM47xx: Swap serial console if ttyS1 was specified.
Some devices like the Netgear WGT634U are using ttyS1 for default console
output. We should switch to that console if it was given in the kernel_args
parameters.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/1848/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hauke Mehrtens [Sat, 27 Nov 2010 16:46:00 +0000 (17:46 +0100)]
MIPS: BCM47xx: Use sscanf for parsing mac address
Instead of writing own function for parsing the mac address we now
use sscanf.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/1847/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hauke Mehrtens [Sat, 27 Nov 2010 16:45:59 +0000 (17:45 +0100)]
MIPS: BCM47xx: Fill values for b43 into SSB sprom
Fill the sprom with all available values from the nvram. Most of these
new values are needed for the b43 or b43legacy driver.
Parts of this patch have been in OpenWRT for a long time and were written
by Michael Buesch.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/1846/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hauke Mehrtens [Sat, 27 Nov 2010 16:45:58 +0000 (17:45 +0100)]
MIPS: BCM47xx: Do not read config from CFE
The config options read out here are not stored in CFE but only in NVRAM on
the devices. Remove reading from CFE and only access the NVRAM. Reading out
CFE does not harm but is useless here.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/1845/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Thomas Chou [Wed, 24 Nov 2010 07:35:48 +0000 (15:35 +0800)]
MIPS: FDT size is a be32
The totalsize field was be32. And the reserve bootmem would cause failure.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
To: devicetree-discuss@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: grant.likely@secretlab.ca
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Dezhong Diao <dediao@cisco.com>
Patchwork: https://patchwork.linux-mips.org/patch/1838/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kevin Cernekee [Tue, 23 Nov 2010 18:26:44 +0000 (10:26 -0800)]
MIPS: Fix CP0 COUNTER clockevent race
Consider the following test case:
write_c0_compare(read_c0_count());
Even if the counter doesn't increment during execution, this might not
generate an interrupt until the counter wraps around. The CPU may
perform the comparison each time CP0 COUNT increments, not when CP0
COMPARE is written.
If mips_next_event() is called with a very small delta, and CP0 COUNT
increments during the calculation of "cnt += delta", it is possible
that CP0 COMPARE will be written with the current value of CP0 COUNT.
If this is detected, the function should return -ETIME, to indicate
that the interrupt might not have actually gotten scheduled.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1836/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kevin Cernekee [Tue, 23 Nov 2010 18:26:45 +0000 (10:26 -0800)]
MIPS: Fix regression on BCM4710 processor detection
BCM4710 uses the BMIPS32 core (like BCM6345), not the MIPS 4Kc core as
was previously believed.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Tested-by: Alexandros C. Couloumbis <alex@ozo.com>
Patchwork: https://patchwork.linux-mips.org/patch/1837/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Lars-Peter Clausen [Thu, 11 Nov 2010 18:08:52 +0000 (19:08 +0100)]
MIPS: JZ4740: Fix pcm device name
As part the ASoC multi-component patch (commit
f0fba2ad) the jz4740 pcm
driver was renamed to 'jz4740-pcm-audio'. Adjust the device name
accordingly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1770/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Tony Wu [Wed, 10 Nov 2010 13:48:15 +0000 (21:48 +0800)]
MIPS: Separate two consecutive loads in memset.S
partial_fixup is used in noreorder block.
Separating two consecutive loads can save one cycle on processors with
GPR intrelock and can fix load-use on processors that need a load delay slot.
Also do so for fwd_fixup.
[Ralf: Only R2000/R3000 class processors are lacking the the load-user
interlock and even some of those got it retrofitted. With R2000/R3000
being fairly uncommon these days the impact of this bug should be minor.]
Signed-off-by: Tony Wu <tung7970@gmail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1768/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Thu, 21 Oct 2010 23:32:26 +0000 (16:32 -0700)]
MIPS: Send proper signal and siginfo on FP emulator faults.
We were unconditionally sending SIGBUS with an empty siginfo on FP
emulator faults. This differs from what happens when real floating
point hardware would get a fault.
For most faults we need to send SIGSEGV with the faulting address
filled in in the struct siginfo.
Reported-by: Camm Maguire <camm@maguirefamily.org>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: Camm Maguire <camm@maguirefamily.org>
Patchwork: https://patchwork.linux-mips.org/patch/1727/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Sun, 31 Oct 2010 22:49:58 +0000 (23:49 +0100)]
MIPS: AR7: Fix loops per jiffies on TNETD7200 devices
TNETD7200 run their CPU clock faster than the default CPU clock we assume.
In order to have the correct loops per jiffies settings, initialize clocks right
before setting mips_hpt_frequency. As a side effect, we can no longer use
msleep in clocks.c which requires other parts of the kernel to be initialized,
so replace these with mdelay.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1749/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Sun, 31 Oct 2010 22:49:57 +0000 (23:49 +0100)]
MIPS: AR7: Fix double ar7_gpio_init declaration
Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1748/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Fri, 5 Nov 2010 22:12:48 +0000 (15:12 -0700)]
MIPS: Rework GENERIC_HARDIRQS Kconfig.
Recent changes to CONFIG_GENERIC_HARDIRQS have caused us to start getting:
warning: (SMP && SYS_SUPPORTS_SMP) selects IRQ_PER_CPU which has unmet direct dependencies (HAVE_GENERIC_HARDIRQS)
Rearranging our Kconfig quiets the message.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Patchwork: https://patchwork.linux-mips.org/patch/1757/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Yoichi Yuasa [Mon, 8 Nov 2010 08:23:52 +0000 (17:23 +0900)]
MIPS: Alchemy: Add return value check for strict_strtoul()
arch/mips/alchemy/devboards/prom.c: In function 'prom_init':
arch/mips/alchemy/devboards/prom.c:60: error: ignoring return value of
'strict_strtoul', declared with attribute warn_unused_result
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/1761/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Wu Zhangjin [Mon, 8 Nov 2010 13:25:24 +0000 (21:25 +0800)]
MIPS: Loongson: Add return value check for strict_strtoul()
cc1: warnings being treated as errors
arch/mips/loongson/common/env.c: In function 'prom_init_env':
arch/mips/loongson/common/env.c:49: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result
arch/mips/loongson/common/env.c:50: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result
arch/mips/loongson/common/env.c:51: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result
arch/mips/loongson/common/env.c:52: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/1762/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Jesper Juhl [Sat, 30 Oct 2010 16:37:16 +0000 (18:37 +0200)]
MIPS: VPE loader: Check vmalloc return value in vpe_open
The return value of the vmalloc() call in arch/mips/kernel/vpe.c::vpe_open()
is not checked, so we potentially store a null pointer in v->pbuffer. Add
a check for a null return and then return -ENOMEM in that case.
[Ralf: The check added by Jesper's original patch is where it logically
should be. Adding it eleminated the need for the checks in a few other
places, so I removed them. There still is a zillion of other things that
need to be fixed in this file / API.]
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1747/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Tue, 2 Nov 2010 00:43:08 +0000 (17:43 -0700)]
MIPS: compat: Don't clobber personality bits in 32-bit sys_personality().
If PER_LINUX32 has been set on a 32-bit kernel, only twiddle with the
low-order personality bits, let the upper bits pass through.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: Camm Maguire <camm@maguirefamily.org>
Patchwork: https://patchwork.linux-mips.org/patch/1751/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Tue, 2 Nov 2010 00:43:07 +0000 (17:43 -0700)]
MIPS: Don't clobber personality high bits.
The high bits of current->personality carry settings that we don't want to
clobber on each exec. Only clobber them if the lower bits that indicate
either PER_LINUX or PER_LINUX32 are invalid.
The clobbering prevents us from using useful bits like ADDR_NO_RANDOMIZE.
Reported-by: Camm Maguire <camm@maguirefamily.org>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: Camm Maguire <camm@maguirefamily.org>
Patchwork: https://patchwork.linux-mips.org/patch/1750/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Lars-Peter Clausen [Thu, 4 Nov 2010 22:25:57 +0000 (23:25 +0100)]
MIPS: jz4740: Fix section mismatch in prom.c
This patch fixes the following section mismatch:
WARNING: arch/mips/built-in.o(.text+0xc): Section mismatch in reference from the
function jz4740_init_cmdline() to the variable .init.data:arcs_cmdline
While were at it, make jz4740_init_cmdline static as well.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1755/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Lars-Peter Clausen [Thu, 4 Nov 2010 22:25:56 +0000 (23:25 +0100)]
MIPS: jz4740: qi_lb60: Fix gpio for the 6th row of the keyboard matrix
This patch fixes the gpio number for the 6th row of the keyboard matrix.
(And fixes a typo in my name...)
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: stable@kernel.org
Signed-off-by: https://patchwork.linux-mips.org/patch/1754/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Thu, 4 Nov 2010 11:13:59 +0000 (11:13 +0000)]
MIPS: Don't stomp on caller's ->regs[2] in copy_thread()
We never needed that (->regs[2] is overwritten on return from syscall paths
with return value of syscall, so storing it there early made no sense) and
with new restart logics since
d27240bf7e61d2656de18e158ec910a902030847 it
has become really bad - we lose the original syscall number before the
place where we decide that we might need a syscall restart.
Note that for child we do need the assignment to regs[2] - it won't go
through the normal return from syscall path.
[Ralf: Issue found and reported by LluÃs; initial investigations by me;
bug finally found and patch by Al; testing by me and LluÃs.]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: LluÃs Batlle i Rossell <viriketo@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Tue, 2 Nov 2010 19:38:53 +0000 (19:38 +0000)]
MIPS: Swarm: Fix typo in symbol name: RTC_M4LT81 -> RTC_M41T81
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds [Thu, 16 Dec 2010 16:51:57 +0000 (08:51 -0800)]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest: populate initial_page_table
lguest: restore boot speed
lguest: fix crash lguest_time_init
Linus Torvalds [Thu, 16 Dec 2010 16:34:22 +0000 (08:34 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ryusuke/nilfs2
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: fix regression of garbage collection ioctl
Linus Torvalds [Thu, 16 Dec 2010 16:33:44 +0000 (08:33 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: define separate EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2
Input: wacom - add another Bamboo Pen ID (0xd4)
Rusty Russell [Thu, 16 Dec 2010 23:03:15 +0000 (17:03 -0600)]
lguest: populate initial_page_table
Two x86 patches broke lguest:
1)
v2.6.35-492-g72d7c3b, which changed x86 to use the memblock allocator.
In lguest, the host places linear page tables at the top of mem, which
used to be enough to get us up to the swapper_pg_dir page tables. With
the first patch, the direct mapping tables used that memory:
Before: kernel direct mapping tables up to
4000000 @ 7000-1a000
After: kernel direct mapping tables up to
4000000 @
3fed000-
4000000
I initially fixed this by lying about the amount of memory we had, so
the kernel wouldn't blatt the lguest boot pagetables (yuk!), but then...
2)
v2.6.36-rc8-54-gb40827f, which made x86 boot use initial_page_table.
This was initialized in a part of head_32.S which isn't executed by
lguest; it is then copied into swapper_pg_dir. So we have to initialize
it; and anyway we switch to it before we blatt the old tables, so that
fixes the previous damage as well.
For the moment, I cut & pasted the code into lguest's boot code, but
next merge window I will merge them.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: x86@kernel.org
Rusty Russell [Thu, 16 Dec 2010 23:03:15 +0000 (17:03 -0600)]
lguest: restore boot speed
lguest is dumb and drops *all* the pagetables for set_pte (which is
only used for kernel mapping manipulation, so it's OK without highmem).
But it's used a lot in boot, too. As a guest optimization, we
suppressed this flushing until the first page switch. Now we have
initial_page_table, that happens much earlier, so extend the heuristic
to wait until we switch to something other than the swapper_pg_dir or
initial_page_table.
As measured on my laptop under kvm, this dropped the time-to-mount-root
from 48 seconds to 4.3 seconds.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Thu, 16 Dec 2010 23:03:13 +0000 (17:03 -0600)]
lguest: fix crash lguest_time_init
fe25c7fc2e "x86: lguest: Convert to new irq chip functions" converted
enable_lguest_irq() to take a struct irq_data *, but didn't fix the one
internal caller.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To: x86@kernel.org
Ryusuke Konishi [Thu, 16 Dec 2010 00:57:57 +0000 (09:57 +0900)]
nilfs2: fix regression of garbage collection ioctl
On 2.6.37-rc1, garbage collection ioctl of nilfs was broken due to the
commit
263d90cefc7d82a0 ("nilfs2: remove own inode hash used for GC"),
and leading to filesystem corruption.
The patch doesn't queue gc-inodes for log writer if they are reused
through the vfs inode cache. Here, gc-inode is the inode which
buffers blocks to be relocated on GC. That patch queues gc-inodes in
nilfs_init_gcinode() function, but this function is not called when
they don't have I_NEW flag. Thus, some of live blocks are wrongly
overrode without being moved to new logs.
This resolves the problem by moving the gc-inode queueing to an outer
function to ensure it's done right.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Linus Torvalds [Thu, 16 Dec 2010 01:24:48 +0000 (17:24 -0800)]
Linux 2.6.37-rc6
Linus Torvalds [Thu, 16 Dec 2010 01:24:05 +0000 (17:24 -0800)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: ghash-intel - ghash-clmulni-intel_glue needs err.h
Linus Torvalds [Wed, 15 Dec 2010 20:41:17 +0000 (12:41 -0800)]
Merge branch 'for_linus' of git://git./linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix typo which broke '..' detection in ext4_find_entry()
ext4: Turn off multiple page-io submission by default
Jeremy Fitzhardinge [Wed, 8 Dec 2010 20:39:12 +0000 (12:39 -0800)]
xen: Provide a variant of __RING_SIZE() that is an integer constant expression
Without this, gcc 4.5 won't compile xen-netfront and xen-blkfront, where
this is being used to specify array sizes.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: David Miller <davem@davemloft.net>
Cc: Stable Kernel <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Daniel Walker [Thu, 9 Dec 2010 23:45:27 +0000 (15:45 -0800)]
MAINTAINERS: update MSM git tree
The MSM main git tree has changed over to this new address.
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tavis Ormandy [Thu, 9 Dec 2010 14:29:42 +0000 (15:29 +0100)]
install_special_mapping skips security_file_mmap check.
The install_special_mapping routine (used, for example, to setup the
vdso) skips the security check before insert_vm_struct, allowing a local
attacker to bypass the mmap_min_addr security restriction by limiting
the available pages for special mappings.
bprm_mm_init() also skips the check, and although I don't think this can
be used to bypass any restrictions, I don't see any reason not to have
the security check.
$ uname -m
x86_64
$ cat /proc/sys/vm/mmap_min_addr
65536
$ cat install_special_mapping.s
section .bss
resb BSS_SIZE
section .text
global _start
_start:
mov eax, __NR_pause
int 0x80
$ nasm -D__NR_pause=29 -DBSS_SIZE=0xfffed000 -f elf -o install_special_mapping.o install_special_mapping.s
$ ld -m elf_i386 -Ttext=0x10000 -Tbss=0x11000 -o install_special_mapping install_special_mapping.o
$ ./install_special_mapping &
[1] 14303
$ cat /proc/14303/maps
0000f000-
00010000 r-xp
00000000 00:00 0 [vdso]
00010000-
00011000 r-xp
00001000 00:19
2453665 /home/taviso/install_special_mapping
00011000-
ffffe000 rwxp
00000000 00:00 0 [stack]
It's worth noting that Red Hat are shipping with mmap_min_addr set to
4096.
Signed-off-by: Tavis Ormandy <taviso@google.com>
Acked-by: Kees Cook <kees@ubuntu.com>
Acked-by: Robert Swiecki <swiecki@google.com>
[ Changed to not drop the error code - akpm ]
Reviewed-by: James Morris <jmorris@namei.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Eric Paris [Tue, 7 Dec 2010 20:27:57 +0000 (15:27 -0500)]
fanotify: fill in the metadata_len field on struct fanotify_event_metadata
The fanotify_event_metadata now has a field which is supposed to
indicate the length of the metadata portion of the event. Fill in that
field as well.
Based-in-part-on-patch-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Alexey Zaytsev [Mon, 22 Nov 2010 00:33:03 +0000 (00:33 +0000)]
fanotify: split version into version and metadata_len
To implement per event type optional headers we are interested in
knowing how long the metadata structure is. This patch slits the __u32
version field into a __u8 version and a __u16 metadata_len field (with
__u8 left over). This should allow for backwards compat ABI.
Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
[rewrote descrtion and changed object sizes and ordering - eparis]
Signed-off-by: Eric Paris <eparis@redhat.com>
Randy Dunlap [Wed, 15 Dec 2010 09:58:57 +0000 (17:58 +0800)]
crypto: ghash-intel - ghash-clmulni-intel_glue needs err.h
Add missing header file:
arch/x86/crypto/ghash-clmulni-intel_glue.c:256: error: implicit declaration of function 'IS_ERR'
arch/x86/crypto/ghash-clmulni-intel_glue.c:257: error: implicit declaration of function 'PTR_ERR'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Dmitry Torokhov [Wed, 15 Dec 2010 07:53:21 +0000 (23:53 -0800)]
Input: define separate EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2
The desire to keep old names for the EVIOCGKEYCODE/EVIOCSKEYCODE while
extending them to support large scancodes was a mistake. While we tried
to keep ABI intact (and we succeeded in doing that, programs compiled
on older kernels will work on newer ones) there is still a problem with
recompiling existing software with newer kernel headers.
New kernel headers will supply updated ioctl numbers and kernel will
expect that userspace will use struct input_keymap_entry to set and
retrieve keymap data. But since the names of ioctls are still the same
userspace will happily compile even if not adjusted to make use of the
new structure and will start miraculously fail in the field.
To avoid this issue let's revert EVIOCGKEYCODE/EVIOCSKEYCODE definitions
and add EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2 so that userspace can explicitly
select the style of ioctls it wants to employ.
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Linus Torvalds [Wed, 15 Dec 2010 02:50:10 +0000 (18:50 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tj/wq
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: It is likely that WORKER_NOT_RUNNING is true
MAINTAINERS: Add workqueue entry
workqueue: check the allocation of system_unbound_wq
Linus Torvalds [Wed, 15 Dec 2010 02:49:40 +0000 (18:49 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: protect against NULL reference when waiting to start a raid10.
md: fix bug with re-adding of partially recovered device.
md: fix possible deadlock in handling flush requests.
md: move code in to submit_flushes.
md: remove handling of flush_pending in md_submit_flush_data
Major Lee [Fri, 10 Dec 2010 10:13:49 +0000 (10:13 +0000)]
dw_spi: Fix missing final read in some polling situations
There is a possibility that the last word of a transaction will be lost
if data is not ready. Re-read in poll_transfer() to solve this issue
when poll_mode is enabled.
Verified on SPI touch screen device.
Signed-off-by: Major Lee <major_lee@wistron.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alan Cox [Tue, 14 Dec 2010 15:29:08 +0000 (15:29 +0000)]
i2c_intel_mid: Fix slash in sysfs name
This gets caught by the new sanity check code. Instead of the slash use a
different symbol. This was originally found by Major Lee who proposed a
rather more complex patch which changed the name according to the chip
type.
On the basis that we are in a late -rc and making Linus grumpy isn't always
a good idea (however fun) this is a simple alternative.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Aaro Koskinen [Wed, 15 Dec 2010 02:45:31 +0000 (21:45 -0500)]
ext4: fix typo which broke '..' detection in ext4_find_entry()
There should be a check for the NUL character instead of '0'.
Fortunately the only thing that cares about this is NFS serving, which
is why we didn't notice this in the merge window testing.
Reported-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Linus Torvalds [Wed, 15 Dec 2010 01:37:08 +0000 (17:37 -0800)]
Merge branch 'sh-fixes-for-linus' of git://git./linux/kernel/git/lethal/sh-2.6
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: wire up accept4 syscall (non-multiplexed path)
sh: Enable deprecated IRQ chip APIs for MFD and GPIOLIB drivers.
Linus Torvalds [Wed, 15 Dec 2010 01:36:35 +0000 (17:36 -0800)]
Merge branch 'omap-fixes-for-linus' of git://git./linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
OMAP2: PRCM: fix some SHIFT macros that were actually bitmasks
OMAP2+: PM/serial: fix console semaphore acquire during suspend
OMAP1: SRAM: fix size for OMAP1611 SoCs
arm: omap2: io: fix clk_get() error check
arm: plat-omap: counter_32k: use IS_ERR() instead of NULL check
omap: nand: remove hardware ECC as default
omap: zoom: wl1271 slot is MMC_CAP_POWER_OFF_CARD
omap: PM debug: fix wake-on-timer debugfs dependency
Linus Torvalds [Wed, 15 Dec 2010 01:36:10 +0000 (17:36 -0800)]
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6535/1: V6 MPCore v6_dma_inv_range and v6_dma_flush_range RWFO fix
ARM: 6534/1: Make CONFIG_FPE_NWFPE depend on !CONFIG_THUMB2_KERNEL
ARM: 6533/1: Thumb-2: Make CONFIG_THUMB2_KERNEL depend on !CPU_V6
Change bcmring Maintainer list.
ARM: Update mach-types
ARM: 6528/1: Use CTR for the I-cache line size on ARMv7
ARM: 6527/1: Use CTR instead of CCSIDR for the D-cache line size on ARMv7
ARM: pxa/palm: fix ifdef around gen_nand driver registration
ARM: pxa: fix pxa2xx-flash section mismatch
ARM: mmp2: remove not used clk_rtc
Linus Torvalds [Wed, 15 Dec 2010 01:34:00 +0000 (17:34 -0800)]
Merge git://git./linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc: Write to prom console using indirect buffer.
sparc: Delete prom_*getchar().
sparc: Pass buffer pointer all the way down to prom_{get,put}char().
sparc: Do not export prom_nb{get,put}char().
sparc64: Delete prom_setcallback().
sparc64: Unexport prom_service_exists().
sparc: Kill prom devops_{32,64}.c
sparc: Remove prom_pathtoinode()
sparc64: Delete prom_puts() unused.
SPARC/LEON: removed constant timer initialization as if HZ=100, now it reflects the value of HZ
Linus Torvalds [Wed, 15 Dec 2010 01:33:40 +0000 (17:33 -0800)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (75 commits)
pppoe.c: Fix kernel panic caused by __pppoe_xmit
WAN: Fix a TX IRQ causing BUG() in PC300 and PCI200SYN drivers.
bnx2x: Advance a version number to 1.60.01-0
bnx2x: Fixed a compilation warning
bnx2x: LSO code was broken on BE platforms
qlge: Fix deadlock when cancelling worker.
net: fix skb_defer_rx_timestamp()
cxgb4vf: Ingress Queue Entry Size needs to be 64 bytes
phy: add the IC+ IP1001 driver
atm: correct sysfs 'device' link creation and parent relationships
MAINTAINERS: remove me from tulip
SCTP: Fix SCTP_SET_PEER_PRIMARY_ADDR to accpet v4mapped address
enic: Bug Fix: Pass napi reference to the isr that services receive queue
ipv6: fix nl group when advertising a new link
connector: add module alias
net: Document the kernel_recvmsg() function
r8169: Fix runtime power management
hso: IP checksuming doesn't work on GE0301 option cards
xfrm: Fix xfrm_state_migrate leak
net: Convert netpoll blocking api in bonding driver to be a counter
...
Linus Torvalds [Wed, 15 Dec 2010 01:32:56 +0000 (17:32 -0800)]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] hpsa: fix redefinition of PCI_DEVICE_ID_CISSF
[SCSI] qla2xxx: Update version number to 8.03.05-k0.
[SCSI] qla2xxx: Properly set the return value in qla2xxx_eh_abort function.
[SCSI] qla2xxx: Correct issue where NPIV-config data was not being allocated for 82xx parts.
[SCSI] qla2xxx: Change MSI initialization from using incorrect request_irq parameter.
[SCSI] qla2xxx: Populate Command Type 6 LUN field properly.
[SCSI] zfcp: Issue FCP command without holding SCSI host_lock
[SCSI] zfcp: Prevent usage w/o holding a reference
[SCSI] zfcp: No ERP escalation on gpn_ft eval
[SCSI] zfcp: Correct false abort data assignment.
[SCSI] zfcp: Fix common FCP request reception
[SCSI] Eliminate error handler overload of the SCSI serial number
[SCSI] pmcraid: disable msix and expand device config entry
[SCSI] bsg: correct fault if queue object removed while dev_t open
[SCSI] osd: checking NULL instead of ERR_PTR()
Linus Torvalds [Tue, 14 Dec 2010 22:35:04 +0000 (14:35 -0800)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdboc,input: Fix regression with keyboard release key and early debugging
Linus Torvalds [Tue, 14 Dec 2010 22:33:33 +0000 (14:33 -0800)]
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:
ACPI / PM: Do not save/restore NVS on Sony Vaio VGN-NW130D
ACPI/HEST: adjust section selection
ACPI: eliminate unused variable warning for !ACPI_SLEEP
ACPI/PNP: avoid section mismatch warning
ACPI thermal: remove two unused functions
ACPI: fix a section mismatch
ACPI, APEI, use raw spinlock in ERST
ACPI: video: fix build for CONFIG_ACPI=n
ACPI: video: fix build for VIDEO_OUTPUT_CONTROL=n
ACPI: fix allowing to add/remove multiple _OSI strings
acpi: fix _OSI string setup regression
ACPI: EC: Add another dmi match entry for MSI hardware
ACPI battery: update status upon sysfs query
ACPI ac: update AC status upon sysfs query
ACPI / PM: Do not refcount power resources that can't be turned on
ACPI / PM: Check device state before refcounting power resources
Linus Torvalds [Tue, 14 Dec 2010 22:33:13 +0000 (14:33 -0800)]
Merge branch 'idle-release' of git://git./linux/kernel/git/lenb/linux-idle-2.6
* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
intel_idle: recognize ARAT on WSM-EX
Valentine Barshak [Mon, 13 Dec 2010 23:03:16 +0000 (00:03 +0100)]
ARM: 6535/1: V6 MPCore v6_dma_inv_range and v6_dma_flush_range RWFO fix
Cache ownership must be acquired by reading/writing data from the
cache line to make cache operation have the desired effect on the
SMP MPCore CPU. However, the ownership is never acquired in the
v6_dma_inv_range function when cleaning the first line and
flushing the last one, in case the address is not aligned
to D_CACHE_LINE_SIZE boundary.
Fix this by reading/writing data if needed, before performing
cache operations.
While at it, fix v6_dma_flush_range to prevent RWFO outside
the buffer.
Cc: stable@kernel.org
Signed-off-by: Valentine Barshak <vbarshak@mvista.com>
Signed-off-by: George G. Davis <gdavis@mvista.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dave Martin [Mon, 13 Dec 2010 20:56:03 +0000 (21:56 +0100)]
ARM: 6534/1: Make CONFIG_FPE_NWFPE depend on !CONFIG_THUMB2_KERNEL
Because the nwfpe support is unlikely to be used on new platforms
and requires CONFIG_OABI_COMPAT, which is not generally used with
ARMv7+, we shouldn't expect to build nwfpe support into a Thumb-2
kernel.
At present, nwfpe contains assembly code which isn't Thumb-2
compatible, and for now it doesn't appear useful to port this
code.
All ARMv7-A/R platforms necessarily have VFPv3 hardware floating-
point natively, making emulation unnecessary.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dave Martin [Mon, 13 Dec 2010 20:53:53 +0000 (21:53 +0100)]
ARM: 6533/1: Thumb-2: Make CONFIG_THUMB2_KERNEL depend on !CPU_V6
This makes sense, because Thumb-2 code can't execute on plain
ARMv6 processors.
This will avoid accidentally configuring a broken kernel where the
config otherwise would allow multiple architecture versions to
coexist in the same kernel.
Not adding !CPU_V5 etc., because the chance of anyone trying to
put v5 and v7 in the same kernel is low, and I'm not aware of
any mach which can do this. These could be added later if it
matters.
Note that the rules may need to be refined if support for the
ARM1156J(F)-S processor is later added to the kernel, since this
processor supports the rare ARMv6T2 extensions, which add support
for Thumb-2 and a few other ARMv7 features.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jiandong Zheng [Tue, 14 Dec 2010 21:55:49 +0000 (21:55 +0000)]
Change bcmring Maintainer list.
I am Jiandong Zheng working on BCMRING in Broadcom Canada Ltd. I am
replacing Leo Chen (leochen@broadcom.com) as "ARM/BCMRING ARM
ARCHITECTURE" and "ARM/BCMRING MTD NAND DRIVER" maintainer from
Broadcom as he is no longer the maintainer of these components.
Signed-off-by: Jiandong Zheng <jdzheng@broadcom.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Linus Torvalds [Tue, 14 Dec 2010 21:37:12 +0000 (13:37 -0800)]
Merge branch 'fbdev-fixes-for-linus' of git://git./linux/kernel/git/lethal/fbdev-2.6
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
fbdev: Fix fb_find_nearest_mode refresh comparison
Linus Torvalds [Tue, 14 Dec 2010 21:36:26 +0000 (13:36 -0800)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging:
hwmon: (ltc4215) make sysfs file match the alarm cause
Linus Torvalds [Tue, 14 Dec 2010 21:35:47 +0000 (13:35 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/djbw/async_tx
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
dmaengine: at_hdmac: fix buffer transfer size specification
fsldma: fix issue of slow dma
dmaengine i.MX SDMA: initialize on module_init
dma : EG20T PCH: Fix miss-setting DMA descriptor
intel_mid_dma: fix section mismatch warnings
dmaengine: imx-sdma: fix bug in buffer descriptor initialization
drivers/dma/ppc4xx: Use printf extension %pR for struct resource
drivers/dma/ioat: Use the ccflag-y instead of EXTRA_CFLAGS
drivers/dma/: Use the ccflag-y instead of EXTRA_CFLAGS
dma: intel_mid_dma: fix double free on mid_setup_dma error path
dma: imx-dma: fix imxdma_probe error path
Linus Torvalds [Tue, 14 Dec 2010 21:34:25 +0000 (13:34 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB/uverbs: Handle large number of entries in poll CQ
Linus Torvalds [Tue, 14 Dec 2010 21:33:52 +0000 (13:33 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/ieee1394/linux1394-2.6
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: ohci: fix regression with Agere FW643 rev 06, disable MSI
firewire: ohci: fix regression with VIA VT6315, disable MSI
Linus Torvalds [Tue, 14 Dec 2010 21:33:21 +0000 (13:33 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator: tps6586x: correct register table
regulator: tps6586x: Handle both enable reg/bits being the same
regulator: tps6586x: Fix TPS6586X_DVM to store goreg/bit
regulator: tps6586x: Add missing bit mask generation
Linus Torvalds [Tue, 14 Dec 2010 21:32:40 +0000 (13:32 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: HDA: Quirk for Dell Vostro 320 to make microphone work
ALSA: hda - Reset sample sizes and max bitrates when reading ELD
ALSA: hda - Always allow basic audio irrespective of ELD info
ALSA: hda - Do not wrongly restrict min_channels based on ELD
ASoC: Correct WM8962 interrupt mask register read
ASoC: WM8580: Debug BCLK and sample size
ASoC: Fix resource leak if soc_register_ac97_dai_link failed
ASoC: Hold client_mutex while calling snd_soc_instantiate_cards()
ASoC: Fix swap of left and right channels for WM8993/4 speaker boost gain
ASoC: Fix off by one error in WM8994 EQ register bank size
ALSA: hda: Use position_fix=1 for Acer Aspire 5538 to enable capture on internal mic
ALSA: hda - Enable jack sense for Thinkpad Edge 13
ALSA: hda - Fix ThinkPad T410[s] docking station line-out
ALSA: hda: Use model=lg quirk for LG P1 Express to enable playback and capture
Linus Torvalds [Tue, 14 Dec 2010 21:32:19 +0000 (13:32 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/bp/bp
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
amd64_edac: Fix interleaving check
EDAC: Correct MiB_TO_PAGES() macro
EDAC: Fix workqueue-related crashes
Linus Torvalds [Tue, 14 Dec 2010 21:31:49 +0000 (13:31 -0800)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: don't apply 7xx HDP flush workaround on AGP
drm: use after free in drm_queue_vblank_event()
drm/kms: remove spaces from connector names (v2)
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