H. Peter Anvin [Mon, 17 May 2010 22:13:23 +0000 (15:13 -0700)]
x86, hweight: Use a 32-bit popcnt for __arch_hweight32()
Use a 32-bit popcnt instruction for __arch_hweight32(), even on
x86-64. Even though the input register will *usually* be
zero-extended due to the standard operation of the hardware, it isn't
necessarily so if the input value was the result of truncating a
64-bit operation.
Note: the POPCNT32 variant used on x86-64 has a technically
unnecessary REX prefix to make it five bytes long, the same as a CALL
instruction, therefore avoiding an unnecessary NOP.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <alpine.LFD.2.00.1005171443060.4195@i5.linux-foundation.org>
Borislav Petkov [Mon, 3 May 2010 12:57:11 +0000 (14:57 +0200)]
arch, hweight: Fix compilation errors
Fix function prototype visibility issues when compiling for non-x86
architectures. Tested with crosstool
(ftp://ftp.kernel.org/pub/tools/crosstool/) with alpha, ia64 and sparc
targets.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <20100503130736.GD26107@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Borislav Petkov [Fri, 5 Mar 2010 16:34:46 +0000 (17:34 +0100)]
x86: Add optimized popcnt variants
Add support for the hardware version of the Hamming weight function,
popcnt, present in CPUs which advertize it under CPUID, Function
0x0000_0001_ECX[23]. On CPUs which don't support it, we fallback to the
default lib/hweight.c sw versions.
A synthetic benchmark comparing popcnt with __sw_hweight64 showed almost
a 3x speedup on a F10h machine.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <20100318112015.GC11152@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Peter Zijlstra [Mon, 1 Feb 2010 14:03:07 +0000 (15:03 +0100)]
bitops: Optimize hweight() by making use of compile-time evaluation
Rename the extisting runtime hweight() implementations to
__arch_hweight(), rename the compile-time versions to __const_hweight()
and then have hweight() pick between them.
Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100318111929.GB11152@aftab> Acked-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <1265028224.24455.154.camel@laptop> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Force MSI irq handlers to run with interrupts disabled
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] hpwdt - fix lower timeout limit
[WATCHDOG] iTCO_wdt: TCO Watchdog patch for additional Intel Cougar Point DeviceIDs
[WATCHDOG] doc: Fix use of WDIOC_SETOPTIONS ioctl.
[WATCHDOG] doc: watchdog simple example: don't fail on fsync()
[WATCHDOG] set max63xx driver as ARM only
[WATCHDOG] powerpc: pika_wdt ident cannot be const
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (37 commits)
smc91c92_cs: fix the problem of "Unable to find hardware address"
r8169: clean up my printk uglyness
net: Hook up cxgb4 to Kconfig and Makefile
cxgb4: Add main driver file and driver Makefile
cxgb4: Add remaining driver headers and L2T management
cxgb4: Add packet queues and packet DMA code
cxgb4: Add HW and FW support code
cxgb4: Add register, message, and FW definitions
netlabel: Fix several rcu_dereference() calls used without RCU read locks
bonding: fix potential deadlock in bond_uninit()
net: check the length of the socket address passed to connect(2)
stmmac: add documentation for the driver.
stmmac: fix kconfig for crc32 build error
be2net: fix bug in vlan rx path for big endian architecture
be2net: fix flashing on big endian architectures
be2net: fix a bug in flashing the redboot section
bonding: bond_xmit_roundrobin() fix
drivers/net: Add missing unlock
net: gianfar - align BD ring size console messages
net: gianfar - initialize per-queue statistics
...
Some BIOSes don't configure HPA during boot but do so while resuming.
This causes harddrives to shrink during resume making libata detach
and reattach them. This can be worked around by unlocking HPA if old
size equals native size.
Add ATA_DFLAG_UNLOCK_HPA so that HPA unlocking can be controlled
per-device and update ata_dev_revalidate() such that it sets
ATA_DFLAG_UNLOCK_HPA and fails with -EIO when the above condition is
detected.
Thank you for contacting us. We know that with our M225 line of SSDs
you sometimes need to disable NCQ (native command queuing) to avoid
just the type of errors you're seeing. Our recommendation for the
M225 is to add libata.force=noncq to your Linux kernel boot options,
under the kernel ATA library option.
I have sent your feedback to the engineers working on the C300, and
asked them to please pass it on to the firmware team. I have been
notified that they are in the process of testing and finalizing a
new firmware version, that you can expect to see released around the
end of April. We’ll keep you posted as to when it will be available
for download.
So, turn off NCQ on the drive w/ the current firmware revision.
Reported in the following bug.
https://bugzilla.kernel.org/show_bug.cgi?id=15573
Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: lethalwp@scarlet.be Reported-by: Luke Macken <lmacken@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Wed, 31 Mar 2010 07:41:18 +0000 (16:41 +0900)]
libata: don't whine on spurious IRQ
On configurations where IRQ line is shared with a different
controller, spurious IRQs may happen continuously. The message was
put there primarily for debugging anyway. Kill it.
Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
James Hogan [Mon, 5 Apr 2010 10:31:29 +0000 (11:31 +0100)]
[WATCHDOG] doc: Fix use of WDIOC_SETOPTIONS ioctl.
In the watchdog-test program and watchdog-api.txt, pass the values to
the WDIOC_SETOPTIONS ioctl as a pointer to an integer containing the
values intead of directly in the third ioctl argument. The actual
watchdog drivers in drivers/watchdog don't read the options directly
from the argument but use get_user and copy_from_user.
Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Nick Piggin [Thu, 1 Apr 2010 08:09:40 +0000 (19:09 +1100)]
Fix up possibly racy module refcounting
Module refcounting is implemented with a per-cpu counter for speed.
However there is a race when tallying the counter where a reference may
be taken by one CPU and released by another. Reference count summation
may then see the decrement without having seen the previous increment,
leading to lower than expected count. A module which never has its
actual reference drop below 1 may return a reference count of 0 due to
this race.
Module removal generally runs under stop_machine, which prevents this
race causing bugs due to removal of in-use modules. However there are
other real bugs in module.c code and driver code (module_refcount is
exported) where the callers do not run under stop_machine.
Fix this by maintaining running per-cpu counters for the number of
module refcount increments and the number of refcount decrements. The
increments are tallied after the decrements, so any decrement seen will
always have its corresponding increment counted. The final refcount is
the difference of the total increments and decrements, preventing a
low-refcount from being returned.
Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] qla1280: retain firmware for error recovery
[SCSI] attirbute_container: Initialize sysfs attributes with sysfs_attr_init
[SCSI] advansys: fix regression with request_firmware change
[SCSI] qla2xxx: Updated version number to 8.03.02-k2.
[SCSI] qla2xxx: Prevent sending mbx commands from sysfs during isp reset.
[SCSI] qla2xxx: Disable MSI on qla24xx chips other than QLA2432.
[SCSI] qla2xxx: Check to make sure multique and CPU affinity support is not enabled at the same time.
[SCSI] qla2xxx: Correct vp_idx checking during PORT_UPDATE processing.
[SCSI] qla2xxx: Honour "Extended BB credits" bit for CNAs.
[SCSI] scsi_transport_fc: Make sure commands are completed when rport is offline
[SCSI] libiscsi: Fix recovery slowdown regression
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9p: saving negative to unsigned char
9p: return on mutex_lock_interruptible()
9p: Creating files with names too long should fail with ENAMETOOLONG.
9p: Make sure we are able to clunk the cached fid on umount
9p: drop nlink remove
fs/9p: Clunk the fid resulting from partial walk of the name
9p: documentation update
9p: Fix setting of protocol flags in v9fs_session_info structure.
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: add check for changed leaves in setup_leaf_for_split
Btrfs: create snapshot references in same commit as snapshot
Btrfs: fix small race with delalloc flushing waitqueue's
Btrfs: use add_to_page_cache_lru, use __page_cache_alloc
Btrfs: fix chunk allocate size calculation
Btrfs: kill max_extent mount option
Btrfs: fail to mount if we have problems reading the block groups
Btrfs: check btrfs_get_extent return for IS_ERR()
Btrfs: handle kmalloc() failure in inode lookup ioctl
Btrfs: dereferencing freed memory
Btrfs: Simplify num_stripes's calculation logical for __btrfs_alloc_chunk()
Btrfs: Add error handle for btrfs_search_slot() in btrfs_read_chunk_tree()
Btrfs: Remove unnecessary finish_wait() in wait_current_trans()
Btrfs: add NULL check for do_walk_down()
Btrfs: remove duplicate include in ioctl.c
Fix trivial conflict in fs/btrfs/compression.c due to slab.h include
cleanups.
Eric Paris [Mon, 5 Apr 2010 20:16:26 +0000 (16:16 -0400)]
audit: preface audit printk with audit
There have been a number of reports of people seeing the message:
"name_count maxed, losing inode data: dev=00:05, inode=3185"
in dmesg. These usually lead to people reporting problems to the filesystem
group who are in turn clueless what they mean.
Eventually someone finds me and I explain what is going on and that
these come from the audit system. The basics of the problem is that the
audit subsystem never expects a single syscall to 'interact' (for some
wish washy meaning of interact) with more than 20 inodes. But in fact
some operations like loading kernel modules can cause changes to lots of
inodes in debugfs.
There are a couple real fixes being bandied about including removing the
fixed compile time limit of 20 or not auditing changes in debugfs (or
both) but neither are small and obvious so I am not sending them for
immediate inclusion (I hope Al forwards a real solution next devel
window).
In the meantime this patch simply adds 'audit' to the beginning of the
crap message so if a user sees it, they come blame me first and we can
talk about what it means and make sure we understand all of the reasons
it can happen and make sure this gets solved correctly in the long run.
Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dan Carpenter [Mon, 5 Apr 2010 19:37:28 +0000 (14:37 -0500)]
9p: saving negative to unsigned char
Saving -EINVAL as unsigned char truncates the high bits and changes it
into 234 instead of -22. This breaks the test for "if (ret == -EINVAL)"
in parse_opts().
Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Dan Carpenter [Tue, 30 Mar 2010 09:41:25 +0000 (09:41 +0000)]
9p: return on mutex_lock_interruptible()
If "err" is -EINTR here the original code calls mutex_unlock() and then
returns, but it should just return directly.
Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
Chris Mason [Fri, 2 Apr 2010 13:20:18 +0000 (09:20 -0400)]
Btrfs: add check for changed leaves in setup_leaf_for_split
setup_leaf_for_split needs to drop the path and search again, and has
checks to see if the item we want to split changed size. But, it misses
the case where the leaf changed and now has enough room for the item
we want to insert.
This adds an extra check to make sure the leaf really needs splitting
before we call btrfs_split_leaf(), which keeps us from trying to split
a leaf with a single item.
btrfs_split_leaf() will blindly split the single item leaf, leaving us
with one good leaf and one empty leaf and then a crash.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Sage Weil [Mon, 15 Mar 2010 17:27:13 +0000 (17:27 +0000)]
Btrfs: create snapshot references in same commit as snapshot
This creates the reference to a new snapshot in the same commit as the
snapshot itself. This avoids the need for a second commit in order for a
snapshot to be persistent, and also avoids the problem of "leaking" a
new snapshot tree root if the host crashes before the second commit takes
place.
It is not at all clear to me why it wasn't always done this way. If there
is still a reason for the two-stage {create,finish}_pending_snapshots()
approach I'm missing something! :)
I've been running this for a couple weeks under pretty heavy usage (a few
snapshots per minute) without obvious problems.
Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Fri, 12 Mar 2010 19:28:18 +0000 (19:28 +0000)]
Btrfs: fix small race with delalloc flushing waitqueue's
Everytime we start a new flushing thread, we init the waitqueue if there isn't a
flushing thread running. The problem with this is we check
space_info->flushing, which we clear right before doing a wake_up on the
flushing waitqueue, which causes problems if we init the waitqueue in the middle
of clearing the flushing flagh and calling wake_up. This is hard to hit, but
the code is wrong anyway, so init the flushing/allocating waitqueue when
creating the space info and let it be. I haven't seen the panic since I've been
using this patch. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Nick Piggin [Wed, 17 Mar 2010 13:31:04 +0000 (13:31 +0000)]
Btrfs: use add_to_page_cache_lru, use __page_cache_alloc
Pagecache pages should be allocated with __page_cache_alloc, so they
obey pagecache memory policies.
add_to_page_cache_lru is exported, so it should be used. Benefits over
using a private pagevec: neater code, 128 bytes fewer stack used, percpu
lru ordering is preserved, and finally don't need to flush pagevec
before returning so batching may be shared with other LRU insertions.
Signed-off-by: Nick Piggin <npiggin@suse.de>: Signed-off-by: Chris Mason <chris.mason@oracle.com>
Merge branch 'slabh' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc
* 'slabh' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc:
eeepc-wmi: include slab.h
staging/otus: include slab.h from usbdrv.h
percpu: don't implicitly include slab.h from percpu.h
kmemcheck: Fix build errors due to missing slab.h
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
iwlwifi: don't include iwl-dev.h from iwl-devtrace.h
x86: don't include slab.h from arch/x86/include/asm/pgtable_32.h
Fix up trivial conflicts in include/linux/percpu.h due to
is_kernel_percpu_address() having been introduced since the slab.h
cleanup with the percpu_up.c splitup.
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
module: add stub for is_module_percpu_address
percpu, module: implement and use is_kernel/module_percpu_address()
module: encapsulate percpu handling better and record percpu_size
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf: Always build the powerpc perf_arch_fetch_caller_regs version
perf: Always build the stub perf_arch_fetch_caller_regs version
perf, probe-finder: Build fix on Debian
perf/scripts: Tuple was set from long in both branches in python_process_event()
perf: Fix 'perf sched record' deadlock
perf, x86: Fix callgraphs of 32-bit processes on 64-bit kernels
perf, x86: Fix AMD hotplug & constraint initialization
x86: Move notify_cpu_starting() callback to a later stage
x86,kgdb: Always initialize the hw breakpoint attribute
perf: Use hot regs with software sched switch/migrate events
perf: Correctly align perf event tracing buffer
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: set_cpus_allowed_ptr(): Don't use rq->migration_thread after unlock
sched: Fix proc_sched_set_task()
In initial design, walk_page_range() was designed just for walking page
table and it didn't require mmap_sem. Now, find_vma() etc.. are used
in walk_page_range() and we need mmap_sem around it.
This patch adds mmap_sem around walk_page_range().
Because /proc/<pid>/pagemap's callback routine use put_user(), we have
to get rid of it to do sane fix.
Changelog: 2010/Apr/2
- fixed start_vaddr and end overflow
Changelog: 2010/Apr/1
- fixed start_vaddr calculation
- removed unnecessary cast.
- removed unnecessary change in smaps.
- use GFP_TEMPORARY instead of GFP_KERNEL
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Matt Mackall <mpm@selenic.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: San Mehat <san@google.com> Cc: Brian Swetland <swetland@google.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org>
[ Fixed kmalloc failure return code as per Matt ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David S. Miller [Sun, 4 Apr 2010 08:12:50 +0000 (01:12 -0700)]
sunxvr500: Ignore secondary output PCI devices.
These just represent the secondary and further heads attached to the
card, and they have different sets of PCI bar registers to map.
So don't try to drive them in the main driver.
Reported-by: Frans van Berckel <fberckel@xs4all.nl> Tested-by: Frans van Berckel <fberckel@xs4all.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
Marc Zyngier [Mon, 29 Mar 2010 19:09:14 +0000 (20:09 +0100)]
[WATCHDOG] set max63xx driver as ARM only
Use of ioremap() causes build failure on S390.
Restrict the driver to ARM until another architecture comes along
and enables the driver for its own use.
Signed-off-by: Marc Zyngier <maz@misterjones.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Ben Hutchings [Sat, 3 Apr 2010 20:58:45 +0000 (13:58 -0700)]
sparc64: Fix array size reported by vmemmap_populate()
vmemmap_populate() attempts to report the used index and total size of
vmemmap_table, but it wrongly shifts the total size so that it is
always shown as 0.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
perf: Always build the stub perf_arch_fetch_caller_regs version
Now that software events use perf_arch_fetch_caller_regs() too, we
need the stub version to be always built in for archs that don't
implement it.
Fixes the following build error in PARISC:
kernel/built-in.o: In function `perf_event_task_sched_out':
(.text.perf_event_task_sched_out+0x54): undefined reference to `perf_arch_fetch_caller_regs'
Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6
* 'merge' of git://git.secretlab.ca/git/linux-2.6:
powerpc/5200: in lpbfifo, flag DMA irqs as enabled after requesting them
powerpc/fsl: add device tree binding for QE firmware
of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device tree
Clemens Ladisch [Fri, 2 Apr 2010 16:46:06 +0000 (18:46 +0200)]
PCI quirk: RS780/RS880: disable MSI behind the PCI bridge
The missing initialization of the nb_cntl.strap_msi_enable does not
seem to be the only problem that prevents MSI, so that quirk is not
sufficient to enable MSI on all machines. To be safe, disable MSI
unconditionally for the internal graphics and HDMI audio on these
chipsets.
[rjw: Added the PCI_VENDOR_ID_AI quirk.]
Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'kgdb-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'kgdb-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdb: Turn off tracing while in the debugger
kgdb: use atomic_inc and atomic_dec instead of atomic_set
kgdb: eliminate kgdb_wait(), all cpus enter the same way
kgdbts,sh: Add in breakpoint pc offset for superh
kgdb: have ebin2mem call probe_kernel_write once
Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
Freezer: Fix buggy resume test for tasks frozen with cgroup freezer
Freezer: Only show the state of tasks refusing to freeze
Borislav Petkov [Mon, 29 Mar 2010 16:47:55 +0000 (18:47 +0200)]
perf, probe-finder: Build fix on Debian
Building chokes with:
In file included from /usr/include/gelf.h:53,
from /usr/include/elfutils/libdw.h:53,
from util/probe-finder.h:61,
from util/probe-finder.c:39:
/usr/include/libelf.h:98: error: expected specifier-qualifier-list before 'off64_t'
[...]
Jason Wessel [Fri, 2 Apr 2010 16:47:02 +0000 (11:47 -0500)]
kgdb: eliminate kgdb_wait(), all cpus enter the same way
This is a kgdb architectural change to have all the cpus (master or
slave) enter the same function.
A cpu that hits an exception (wants to be the master cpu) will call
kgdb_handle_exception() from the trap handler and then invoke a
kgdb_roundup_cpu() to synchronize the other cpus and bring them into
the kgdb_handle_exception() as well.
A slave cpu will enter kgdb_handle_exception() from the
kgdb_nmicallback() and set the exception state to note that the
processor is a slave.
Previously the salve cpu would have called kgdb_wait(). This change
allows the debug core to change cpus without resuming the system in
order to inspect arch specific cpu information.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Jason Wessel [Fri, 2 Apr 2010 16:33:29 +0000 (11:33 -0500)]
kgdb: have ebin2mem call probe_kernel_write once
Rather than call probe_kernel_write() one byte at a time, process the
whole buffer locally and pass the entire result in one go. This way,
architectures that need to do special handling based on the length can
do so, or we only end up calling memcpy() once.
[sonic.zhang@analog.com: Reported original problem and preliminary patch]
Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Tom Zanussi [Fri, 2 Apr 2010 04:58:25 +0000 (23:58 -0500)]
perf/scripts: Tuple was set from long in both branches in python_process_event()
This is a fix to the signed/unsigned field handling in the
Python scripting engine, based on a patch from Roel Kluin.
Basically, Python wants to use a PyInt (which is internally a
long) if it can i.e. if the value will fit into that type. If
not, it stores it into a PyLong, which isn't actually a long,
but an arbitrary-precision integer variable.
The code below is similar to to what Python does internally, and
it seems to work as expected on the x86 and x86_64 sytems I
tested it on.
Mike Galbraith [Tue, 30 Mar 2010 09:09:53 +0000 (11:09 +0200)]
sched: Fix proc_sched_set_task()
Latencytop clearing sum_exec_runtime via proc_sched_set_task() breaks
task_times(). Other places in kernel use nvcsw and nivcsw, which are
being cleared as well, Clear task statistics only.
Reported-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1269940193.19286.14.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Mike Galbraith [Fri, 26 Mar 2010 10:11:33 +0000 (11:11 +0100)]
perf: Fix 'perf sched record' deadlock
perf sched record can deadlock a box should the holder of
handle->data->lock take an interrupt, and then attempt to
acquire an rq lock held by a CPU trying to acquire the
same lock. Disable interrupts.
CPU0 CPU1
sched event with rq->lock held
grab handle->data->lock
spin on handle->data->lock
interrupt
try to grab rq->lock
Reported-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Tested-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1269598293.6174.8.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Torok Edwin [Wed, 17 Mar 2010 10:07:16 +0000 (12:07 +0200)]
perf, x86: Fix callgraphs of 32-bit processes on 64-bit kernels
When profiling a 32-bit process on a 64-bit kernel, callgraph tracing
stopped after the first function, because it has seen a garbage memory
address (tried to interpret the frame pointer, and return address as a
64-bit pointer).
Fix this by using a struct stack_frame with 32-bit pointers when the
TIF_IA32 flag is set.
Note that TIF_IA32 flag must be used, and not is_compat_task(), because
the latter is only set when the 32-bit process is executing a syscall,
which may not always be the case (when tracing page fault events for
example).
Signed-off-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paul Mackerras <paulus@samba.org> Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org
LKML-Reference: <1268820436-13145-1-git-send-email-edwintorok@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Commit 3f6da39 ("perf: Rework and fix the arch CPU-hotplug hooks") moved
the amd northbridge allocation from CPUS_ONLINE to CPUS_PREPARE_UP
however amd_nb_id() doesn't work yet on prepare so it would simply bail
basically reverting to a state where we do not properly track node wide
constraints - causing weird perf results.
Fix up the AMD NorthBridge initialization code by allocating from
CPU_UP_PREPARE and installing it from CPU_STARTING once we have the
proper nb_id. It also properly deals with the allocation failing.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
[ robustify using amd_has_nb() ] Signed-off-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <1269353485.5109.48.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: Add NOGET quirk for Quanta Pixart touchscreen
HID: fix oops in gyration_event()
Merge branch 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Fix up the SH-3 build for recent TLB changes.
sh: export return_address() symbol.
sh: Enable the mmu in start_secondary()
sh: Fix FDPIC binary loader
arch/sh/kernel: Use set_cpus_allowed_ptr
sh: Update ecovec_defconfig
USB gadget r8a66597-udc.c: duplicated include
sh: update the TLB replacement counter for entry wiring.
Paul Mundt [Fri, 2 Apr 2010 07:13:27 +0000 (16:13 +0900)]
sh: Fix up the SH-3 build for recent TLB changes.
While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4
and later TLBs, these features are absent on SH-3. This splits out
local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the
old SH-3 one, subsequently fixing up the build.
This will probably want some further reordering and tidying in the
future, but that's out of scope at present.
Neil Horman [Thu, 1 Apr 2010 07:30:07 +0000 (07:30 +0000)]
r8169: clean up my printk uglyness
Fix formatting on r8169 printk
Brandon Philips noted that I had a spacing issue in my printk for the
last r8169 patch that made it quite ugly. Fix that up and add the PFX
macro to it as well so it looks like the other r8169 printks
Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes this problem as well as others like it in the NetLabel
code. Also included in this patch is the identification of future work
to eliminate the RCU read lock in netlbl_domhsh_add(), but in the interest
of getting this patch out quickly that work will happen in another patch
to be finished later.
Thanks to Eric Dumazet and Paul McKenney for their help in understanding
the recent RCU changes.
Signed-off-by: Paul Moore <paul.moore@hp.com> Reported-by: David Howells <dhowells@redhat.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Amerigo Wang [Wed, 31 Mar 2010 21:30:52 +0000 (21:30 +0000)]
bonding: fix potential deadlock in bond_uninit()
bond_uninit() is invoked with rtnl_lock held, when it does destroy_workqueue()
which will potentially flush all works in this workqueue, if we hold rtnl_lock
again in the work function, it will deadlock.
So move destroy_workqueue() to destructor where rtnl_lock is not held any more,
suggested by Eric.
Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Jay Vosburgh <fubar@us.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Jiri Pirko <jpirko@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Carmelo AMOROSO [Wed, 31 Mar 2010 21:44:03 +0000 (21:44 +0000)]
stmmac: fix kconfig for crc32 build error
stmmac uses crc32 functions so it needs to select CRC32.
Fixes build error:
drivers/built-in.o: In function `dwmac1000_set_filter':
dwmac1000_core.c:(.text+0x3c380): undefined reference to `crc32_le'
dwmac1000_core.c:(.text+0x3c384): undefined reference to `bitrev32'
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (76 commits)
drm/radeon/kms: enable ACPI powermanagement mode on radeon gpus.
drm/radeon/kms: rs400/480 should set common registers.
drm/radeon/kms: add sanity check to wptr.
drm/radeon/kms/evergreen: get DP working
drm/radeon/kms: add hw_i2c module option
drm/radeon/kms: use new pre/post_xfer i2c bit algo hooks
drm/radeon/kms: disable MSI on IGP chips
drm/radeon/kms: display watermark updates (v2)
drm/radeon/kms/dp: disable training pattern on the sink at the end of link training
drm/radeon/kms: minor fixes for eDP with LCD* device tags (v2)
drm/radeon/kms/dp: remove extraneous training complete call
drm/radeon/kms/atom: minor fixes to transmitter setup
drm/radeon/kms: Only restrict BO to visible VRAM size when pinning to VRAM.
drm: fix build error when SYSRQ is disabled
drm/radeon/kms: fix macbookpro connector quirk
drm/radeon/r6xx/r7xx: further safe reg clean up
drm/radeon: bump the UMS driver version for r6xx/r7xx const buffer support
drm/radeon/kms: bump the version for r6xx/r7xx const buffer support
drm/radeon/r6xx/r7xx: CS parser fixes
drm/radeon/kms: fix some typos in r6xx/r7xx hpd setup
...
Fix up MSI-related conflicts in drivers/gpu/drm/radeon/radeon_irq_kms.c
Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (35 commits)
microblaze: Support word copying in copy_tofrom_user
microblaze: Print early printk information to log buffer
microblaze: head.S typo fix
microblaze: Use MICROBLAZE_TLB_SIZE in asm code
microblaze: Kconfig Fix - pci
microblaze: Adding likely macros
microblaze: Add .type and .size to ASM functions
microblaze: Fix TLB macros
microblaze: Use instruction with delay slot
microblaze: Remove additional resr and rear loading
microblaze: Change register usage for ESR and EAR
microblaze: Prepare work for optimization in exception code
microblaze: Add DEBUG option
microblaze: Support systems without lmb bram
microblaze: uaccess: Sync strlen, strnlen, copy_to/from_user
microblaze: uaccess: Unify __copy_tofrom_user
microblaze: uaccess: Move functions to generic location
microblaze: uaccess: Fix put_user for noMMU
microblaze: uaccess: Fix get_user macro for noMMU
microblaze: uaccess: fix clear_user for noMMU kernel
...
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86:
eeepc-wmi: new driver for WMI based hotkeys on Eee PC laptops
asus-laptop: fix warning in asus_handle_init
oom: fix the unsafe usage of badness() in proc_oom_score()
proc_oom_score(task) has a reference to task_struct, but that is all.
If this task was already released before we take tasklist_lock
- we can't use task->group_leader, it points to nowhere
- it is not safe to call badness() even if this task is
->group_leader, has_intersects_mems_allowed() assumes
it is safe to iterate over ->thread_group list.
- even worse, badness() can hit ->signal == NULL
Add the pid_alive() check to ensure __unhash_process() was not called.
Also, use "task" instead of task->group_leader. badness() should return
the same result for any sub-thread. Currently this is not true, but
this should be changed anyway.
projects / linux-beck.git / log