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2010-12-15workqueue: convert cancel_rearming_delayed_work[queue]() users to ↵Tejun Heo
cancel_delayed_work_sync() cancel_rearming_delayed_work[queue]() has been superceded by cancel_delayed_work_sync() quite some time ago. Convert all the in-kernel users. The conversions are completely equivalent and trivial. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: "David S. Miller" <davem@davemloft.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: netdev@vger.kernel.org Cc: Anton Vorontsov <cbou@mail.ru> Cc: David Woodhouse <dwmw2@infradead.org> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Alex Elder <aelder@sgi.com> Cc: xfs-masters@oss.sgi.com Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: netfilter-devel@vger.kernel.org Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: linux-nfs@vger.kernel.org
2010-12-14workqueue: It is likely that WORKER_NOT_RUNNING is trueSteven Rostedt
Running the annotate branch profiler on three boxes, including my main box that runs firefox, evolution, xchat, and is part of the distcc farm, showed this with the likelys in the workqueue code: correct incorrect % Function File Line ------- --------- - -------- ---- ---- 96 996253 99 wq_worker_sleeping workqueue.c 703 96 996247 99 wq_worker_waking_up workqueue.c 677 The likely()s in this case were assuming that WORKER_NOT_RUNNING will most likely be false. But this is not the case. The reason is (and shown by adding trace_printks and testing it) that most of the time WORKER_PREP is set. In worker_thread() we have: worker_clr_flags(worker, WORKER_PREP); [ do work stuff ] worker_set_flags(worker, WORKER_PREP, false); (that 'false' means not to wake up an idle worker) The wq_worker_sleeping() is called from schedule when a worker thread is putting itself to sleep. Which happens most of the time outside of that [ do work stuff ]. The wq_worker_waking_up is called by the wakeup worker code, which is also callod outside that [ do work stuff ]. Thus, the likely and unlikely used by those two functions are actually backwards. Remove the annotation and let gcc figure it out. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Tejun Heo <tj@kernel.org>
2010-12-14MAINTAINERS: Add workqueue entryTejun Heo
Signed-off-by: Tejun Heo <tj@kernel.org>
2010-11-26workqueue: check the allocation of system_unbound_wqHitoshi Mitake
I found a trivial bug on initialization of workqueue. Current init_workqueues doesn't check the result of allocation of system_unbound_wq, this should be checked like other queues. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2010-11-25Merge branch 'hwmon-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging * 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging: hwmon: (lis3lv02d_i2c) Fix compile warnings hwmon: (i5k_amb) Fix compile warning
2010-11-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: remove duplicated #include xen: x86/32: perform initial startup on initial_page_table
2010-11-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: arch/tile: fix memchr() not to dereference memory for zero length arch/tile: make glibc's sysconf(_SC_NPROCESSORS_CONF) work correctly arch/tile: fix rwlock so would-be write lockers don't block new readers
2010-11-25Merge branch 'drivers' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile * 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: pci root complex: support for tile architecture drivers/net/tile/: on-chip network drivers for the tile architecture MAINTAINERS: add drivers/char/hvc_tile.c as maintained by tile
2010-11-25Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6482/2: Fix find_next_zero_bit and related assembly ARM: 6490/1: MM: bugfix: initialize spinlock for init_mm.context ARM: avoid annoying <4>'s in printk output SCSI: arm fas216: fix missing ';' ARM: avoid marking decompressor .stack section as having contents ARM: 6489/1: thumb2: fix incorrect optimisation in usracc ARM: 6488/1: nomadik: prevent sched_clock() wraparound ARM: 6484/1: fix compile warning in mm/init.c ARM: 6473/1: Small update to ux500 specific L2 cache code ARM: improve compiler's ability to optimize page tables mx25: fix spi device registration typo ARM i.MX27 eukrea: Fix compilation ARM i.MX spi: fix compilation for i.MX21 ARM i.MX pcm037 eet: compile fixes ARM i.MX: sdma is merged, so remove #ifdef SDMA_IS_MERGED ARM mx3fb: check for DMA engine type mach-pcm037_eet: Fix section mismatch for eet_init_devices()
2010-11-25Merge branch 'fbdev-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/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: sisfb: delete osdef.h sisfb: move the CONFIG warning to sis_main.c sisfb: replace SiS_SetMemory with memset_io sisfb: remove InPort/OutPort wrappers sisfb: use CONFIG_FB_SIS_301/315 instead of SIS301/315H sisfb: delete redudant #define SIS_LINUX_KERNEL sisfb: delete dead SIS_XORG_XF86 code sisfb: delete fallback code for pci_map_rom() sisfb: delete obsolete PCI ROM bug workaround fbdev: Update documentation index file. lxfb: Program panel v/h sync output polarity correctly fbcmap: integer overflow bug fbcmap: cleanup white space in fb_alloc_cmap() MAINTAINERS: Add fbdev patchwork entry, tidy up file patterns. fbdev: da8xx: punt duplicated FBIO_WAITFORVSYNC define fbdev: sh_mobile_lcdcfb: fix bug in reconfig()
2010-11-25Merge branch 'sh-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/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: clkfwk: Build fix for non-legacy CPG changes. sh: Use GCC __builtin_prefetch() to implement prefetch(). sh: fix vsyscall compilation due to .eh_frame issue sh: avoid to flush all cache in sys_cacheflush sh: clkfwk: Disable init clk op for non-legacy clocks. sh: clkfwk: Kill off now unused algo_id in set_rate op. sh: clkfwk: Kill off unused clk_set_rate_ex().
2010-11-25Merge branch 'for-linus' of git://neil.brown.name/mdLinus Torvalds
* 'for-linus' of git://neil.brown.name/md: md: Call blk_queue_flush() to establish flush/fua support md/raid1: really fix recovery looping when single good device fails. md: fix return value of rdev_size_change()
2010-11-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: virtio: fix format of sysfs driver/vendor files Char: virtio_console, fix memory leak virtio: return correct capacity to users module: Update prototype for ref_module (formerly use_module)
2010-11-25arch/x86/include/asm/fixmap.h: mark __set_fixmap_offset as __always_inlineAndrew Morton
When compiling arch/x86/kernel/early_printk_mrst.c with i386 allmodconfig, gcc-4.1.0 generates an out-of-line copy of __set_fixmap_offset() which contains a reference to __this_fixmap_does_not_exist which the compiler cannot elide. Marking __set_fixmap_offset() as __always_inline prevents this. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Feng Tang <feng.tang@intel.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25scripts: fix gfp-translate for recent changes to gfp.hMel Gorman
The recent changes to gfp.h to satisfy sparse broke scripts/gfp-translate. This patch fixes it up to work with old and new versions of gfp.h . [akpm@linux-foundation.org: use `grep -q', per WANG Cong] Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Namhyung Kim <namhyung@gmail.com> Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25reiserfs: fix inode mutex - reiserfs lock misorderingFrederic Weisbecker
reiserfs_unpack() locks the inode mutex with reiserfs_mutex_lock_safe() to protect against reiserfs lock dependency. However this protection requires to have the reiserfs lock to be locked. This is the case if reiserfs_unpack() is called by reiserfs_ioctl but not from reiserfs_quota_on() when it tries to unpack tails of quota files. Fix the ordering of the two locks in reiserfs_unpack() to fix this issue. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reported-by: Markus Gapp <markus.gapp@gmx.net> Reported-by: Jan Kara <jack@suse.cz> Cc: Jeff Mahoney <jeffm@suse.com> Cc: <stable@kernel.org> [2.6.36.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25backlight: grab ops_lock before testing bd->opsUwe Kleine-König
According to the comment describing ops_lock in the definition of struct backlight_device and when comparing with other functions in backlight.c the mutex must be hold when checking ops to be non-NULL. Fixes a problem added by c835ee7f4154992e6 ("backlight: Add suspend/resume support to the backlight core") in Jan 2009. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Richard Purdie <rpurdie@linux.intel.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/misc/isl29020.c: remove incorrect kfree in isl29020_remove()Axel Lin
struct als_data *data is not used in this driver at all. Also add a missing ">" character for MODULE_AUTHOR. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25pagemap: set pagemap walk limit to PMD boundaryNaoya Horiguchi
Currently one pagemap_read() call walks in PAGEMAP_WALK_SIZE bytes (== 512 pages.) But there is a corner case where walk_pmd_range() accidentally runs over a VMA associated with a hugetlbfs file. For example, when a process has mappings to VMAs as shown below: # cat /proc/<pid>/maps ... 3a58f6d000-3a58f72000 rw-p 00000000 00:00 0 7fbd51853000-7fbd51855000 rw-p 00000000 00:00 0 7fbd5186c000-7fbd5186e000 rw-p 00000000 00:00 0 7fbd51a00000-7fbd51c00000 rw-s 00000000 00:12 8614 /hugepages/test then pagemap_read() goes into walk_pmd_range() path and walks in the range 0x7fbd51853000-0x7fbd51a53000, but the hugetlbfs VMA should be handled by walk_hugetlb_range(). Otherwise PMD for the hugepage is considered bad and cleared, which causes undesirable results. This patch fixes it by separating pagemap walk range into one PMD. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25mm: remove call to find_vma in pagewalk for non-hugetlbfsDavid Sterba
Commit d33b9f45 ("mm: hugetlb: fix hugepage memory leak in walk_page_range()") introduces a check if a vma is a hugetlbfs one and later in 5dc37642 ("mm hugetlb: add hugepage support to pagemap") it is moved under #ifdef CONFIG_HUGETLB_PAGE but a needless find_vma call is left behind and its result is not used anywhere else in the function. The side-effect of caching vma for @addr inside walk->mm is neither utilized in walk_page_range() nor in called functions. Signed-off-by: David Sterba <dsterba@suse.cz> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Matt Mackall <mpm@selenic.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25mm/page_alloc.c: fix build_all_zonelist() where percpu_alloc() is wrongly ↵KAMEZAWA Hiroyuki
called under stop_machine_run() During memory hotplug, build_allzonelists() may be called under stop_machine_run(). In this function, setup_zone_pageset() is called. But it's bug because it will do page allocation under stop_machine_run(). Here is a report from Alok Kataria. BUG: sleeping function called from invalid context at kernel/mutex.c:94 in_atomic(): 0, irqs_disabled(): 1, pid: 4, name: migration/0 Pid: 4, comm: migration/0 Not tainted 2.6.35.6-45.fc14.x86_64 #1 Call Trace: [<ffffffff8103d12b>] __might_sleep+0xeb/0xf0 [<ffffffff81468245>] mutex_lock+0x24/0x50 [<ffffffff8110eaa6>] pcpu_alloc+0x6d/0x7ee [<ffffffff81048888>] ? load_balance+0xbe/0x60e [<ffffffff8103a1b3>] ? rt_se_boosted+0x21/0x2f [<ffffffff8103e1cf>] ? dequeue_rt_stack+0x18b/0x1ed [<ffffffff8110f237>] __alloc_percpu+0x10/0x12 [<ffffffff81465e22>] setup_zone_pageset+0x38/0xbe [<ffffffff810d6d81>] ? build_zonelists_node.clone.58+0x79/0x8c [<ffffffff81452539>] __build_all_zonelists+0x419/0x46c [<ffffffff8108ef01>] ? cpu_stopper_thread+0xb2/0x198 [<ffffffff8108f075>] stop_machine_cpu_stop+0x8e/0xc5 [<ffffffff8108efe7>] ? stop_machine_cpu_stop+0x0/0xc5 [<ffffffff8108ef57>] cpu_stopper_thread+0x108/0x198 [<ffffffff81467a37>] ? schedule+0x5b2/0x5cc [<ffffffff8108ee4f>] ? cpu_stopper_thread+0x0/0x198 [<ffffffff81065f29>] kthread+0x7f/0x87 [<ffffffff8100aae4>] kernel_thread_helper+0x4/0x10 [<ffffffff81065eaa>] ? kthread+0x0/0x87 [<ffffffff8100aae0>] ? kernel_thread_helper+0x0/0x10 Built 5 zonelists in Node order, mobility grouping on. Total pages: 289456 Policy zone: Normal This patch tries to fix the issue by moving setup_zone_pageset() out from stop_machine_run(). It's obviously not necessary to be called under stop_machine_run(). [akpm@linux-foundation.org: remove unneeded local] Reported-by: Alok Kataria <akataria@vmware.com> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Tejun Heo <tj@kernel.org> Cc: Petr Vandrovec <petr@vmware.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25cgroups: make swap accounting default behavior configurableMichal Hocko
Swap accounting can be configured by CONFIG_CGROUP_MEM_RES_CTLR_SWAP configuration option and then it is turned on by default. There is a boot option (noswapaccount) which can disable this feature. This makes it hard for distributors to enable the configuration option as this feature leads to a bigger memory consumption and this is a no-go for general purpose distribution kernel. On the other hand swap accounting may be very usuful for some workloads. This patch adds a new configuration option which controls the default behavior (CGROUP_MEM_RES_CTLR_SWAP_ENABLED). If the option is selected then the feature is turned on by default. It also adds a new boot parameter swapaccount[=1|0] which enhances the original noswapaccount parameter semantic by means of enable/disable logic (defaults to 1 if no value is provided to be still consistent with noswapaccount). The default behavior is unchanged (if CONFIG_CGROUP_MEM_RES_CTLR_SWAP is enabled then CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED is enabled as well) Signed-off-by: Michal Hocko <mhocko@suse.cz> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25memcg: avoid deadlock between move charge and try_charge()Daisuke Nishimura
__mem_cgroup_try_charge() can be called under down_write(&mmap_sem)(e.g. mlock does it). This means it can cause deadlock if it races with move charge: Ex.1) move charge | try charge --------------------------------------+------------------------------ mem_cgroup_can_attach() | down_write(&mmap_sem) mc.moving_task = current | .. mem_cgroup_precharge_mc() | __mem_cgroup_try_charge() mem_cgroup_count_precharge() | prepare_to_wait() down_read(&mmap_sem) | if (mc.moving_task) -> cannot aquire the lock | -> true | schedule() Ex.2) move charge | try charge --------------------------------------+------------------------------ mem_cgroup_can_attach() | mc.moving_task = current | mem_cgroup_precharge_mc() | mem_cgroup_count_precharge() | down_read(&mmap_sem) | .. | up_read(&mmap_sem) | | down_write(&mmap_sem) mem_cgroup_move_task() | .. mem_cgroup_move_charge() | __mem_cgroup_try_charge() down_read(&mmap_sem) | prepare_to_wait() -> cannot aquire the lock | if (mc.moving_task) | -> true | schedule() To avoid this deadlock, we do all the move charge works (both can_attach() and attach()) under one mmap_sem section. And after this patch, we set/clear mc.moving_task outside mc.lock, because we use the lock only to check mc.from/to. Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5523.c: perform SW reset before detectionSamu Onkalo
Chip detection may fail if the chip is in some odd state for example after system restart. Chip doesn't have HW reset line. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5521.c: perform SW reset before detectionSamu Onkalo
Chip detection may fail if the chip is in some odd state for example after system restart. Chip doesn't have HW reset line. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5523.c: adjust delays and add comments to themSamu Onkalo
Delays were little bit too long. Adjust delay times and add some comments to them. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5521.c: adjust delays and add comments to themSamu Onkalo
Delays were little bit too long. Adjust delay times and add some comments to them. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5523.c: change some macros to functionsSamu Onkalo
A small macro changed to inline function to have proper type checking. Inline added to two similar small functions. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25drivers/leds/leds-lp5521.c: change some macros to functionsSamu Onkalo
Some small macros changed to inline functions to have proper type checking. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25fuse: fix attributes after open(O_TRUNC)Ken Sumrall
The attribute cache for a file was not being cleared when a file is opened with O_TRUNC. If the filesystem's open operation truncates the file ("atomic_o_trunc" feature flag is set) then the kernel should invalidate the cached st_mtime and st_ctime attributes. Also i_size should be explicitly be set to zero as it is used sometimes without refreshing the cache. Signed-off-by: Ken Sumrall <ksumrall@android.com> Cc: Anfei <anfei.zhou@gmail.com> Cc: "Anand V. Avati" <avati@gluster.com> Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25sgi-xpc: XPC fails to discover partitions with all nasids above 128Robin@sgi.com
UV hardware defines 256 memory protection regions versus the baseline 64 with increasing size for the SN2 ia64. This was overlooked when XPC was modified to accomodate both UV and SN2. Without this patch, a user could reconfigure their existing system and suddenly disable cross-partition communications with no indication of what has gone wrong. It also prevents larger configurations from using cross-partition communication. Signed-off-by: Robin Holt <holt@sgi.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25memcg: fix false positive VM_BUG on non-SMPKirill A. Shutemov
Fix this: kernel BUG at mm/memcontrol.c:2155! invalid opcode: 0000 [#1] last sysfs file: Pid: 18, comm: sh Not tainted 2.6.37-rc3 #3 /Bochs EIP: 0060:[<c10731b2>] EFLAGS: 00000246 CPU: 0 EIP is at mem_cgroup_move_account+0xe2/0xf0 EAX: 00000004 EBX: c6f931d4 ECX: c681c300 EDX: c681c000 ESI: c681c300 EDI: ffffffea EBP: c681c000 ESP: c46f3e30 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 Process sh (pid: 18, ti=c46f2000 task=c6826e60 task.ti=c46f2000) Stack: 00000155 c681c000 0805f000 c46ee180 c46f3e5c c7058820 c1074d37 00000000 08060000 c46db9a0 c46ec080 c7058820 0805f000 08060000 c46f3e98 c1074c50 c106c75e c46f3e98 c46ec080 08060000 0805ffff c46db9a0 c46f3e98 c46e0340 Call Trace: [<c1074d37>] ? mem_cgroup_move_charge_pte_range+0xe7/0x130 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c106c75e>] ? walk_page_range+0xee/0x1d0 [<c10725d6>] ? mem_cgroup_move_task+0x66/0x90 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c1072570>] ? mem_cgroup_move_task+0x0/0x90 [<c1042616>] ? cgroup_attach_task+0x136/0x200 [<c1042878>] ? cgroup_tasks_write+0x48/0xc0 [<c1041e9e>] ? cgroup_file_write+0xde/0x220 [<c101398d>] ? do_page_fault+0x17d/0x3f0 [<c108a79d>] ? alloc_fd+0x2d/0xd0 [<c1041dc0>] ? cgroup_file_write+0x0/0x220 [<c1077ba2>] ? vfs_write+0x92/0xc0 [<c1077c81>] ? sys_write+0x41/0x70 [<c1140e3d>] ? syscall_call+0x7/0xb Code: 03 00 74 09 8b 44 24 04 e8 1c f1 ff ff 89 73 04 8d 86 b0 00 00 00 b9 01 00 00 00 89 da 31 ff e8 65 f5 ff ff e9 4d ff ff ff 0f 0b <0f> 0b 0f 0b 0f 0b 90 8d b4 26 00 00 00 00 83 ec 10 8b 0d f4 e3 EIP: [<c10731b2>] mem_cgroup_move_account+0xe2/0xf0 SS:ESP 0068:c46f3e30 ---[ end trace 7daa1582159b6532 ]--- lock_page_cgroup and unlock_page_cgroup are implemented using bit_spinlock. bit_spinlock doesn't touch the bit if we are on non-SMP machine, so we can't use the bit to check whether the lock was taken. Let's introduce is_page_cgroup_locked based on bit_spin_is_locked instead of PageCgroupLocked to fix it. [akpm@linux-foundation.org: s/is_page_cgroup_locked/page_is_cgroup_locked/] Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujtisu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25uml: disable winch irq before freeing handler dataWill Newton
Disable the winch irq early to make sure we don't take an interrupt part way through the freeing of the handler data, resulting in a crash on shutdown: winch_interrupt : read failed, errno = 9 fd 13 is losing SIGWINCH support ------------[ cut here ]------------ WARNING: at lib/list_debug.c:48 list_del+0xc6/0x100() list_del corruption, next is LIST_POISON1 (00100100) 082578c8: [<081fd77f>] dump_stack+0x22/0x24 082578e0: [<0807a18a>] warn_slowpath_common+0x5a/0x80 08257908: [<0807a23e>] warn_slowpath_fmt+0x2e/0x30 08257920: [<08172196>] list_del+0xc6/0x100 08257940: [<08060244>] free_winch+0x14/0x80 08257958: [<080606fb>] winch_interrupt+0xdb/0xe0 08257978: [<080a65b5>] handle_IRQ_event+0x35/0xe0 08257998: [<080a8717>] handle_edge_irq+0xb7/0x170 082579bc: [<08059bc4>] do_IRQ+0x34/0x50 082579d4: [<08059e1b>] sigio_handler+0x5b/0x80 082579ec: [<0806a374>] sig_handler_common+0x44/0xb0 08257a68: [<0806a538>] sig_handler+0x38/0x50 08257a78: [<0806a77c>] handle_signal+0x5c/0xa0 08257a9c: [<0806be28>] hard_handler+0x18/0x20 08257aac: [<00c14400>] 0xc14400 Signed-off-by: Will Newton <will.newton@gmail.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25nommu: yield CPU while disposing VMSteven J. Magnani
Depending on processor speed, page size, and the amount of memory a process is allowed to amass, cleanup of a large VM may freeze the system for many seconds. This can result in a watchdog timeout. Make sure other tasks receive some service when cleaning up large VMs. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Cc: Greg Ungerer <gerg@snapgear.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25include/linux/fs.h: fix userspace buildLoïc Minier
dpkg uses fiemap but didn't particularly need to include stdint.h so far. Since 367a51a33902 ("fs: Add FITRIM ioctl"), build of linux/fs.h failed in dpkg with: In file included from ../../src/filesdb.c:27:0: /usr/include/linux/fs.h:37:2: error: expected specifier-qualifier-list before 'uint64_t' Use exportable type __u64 to avoid the dependency on stdint.h. b31d42a5af18 ("Fix compile brekage with !CONFIG_BLOCK") fixed only the kernel build by including linux/types.h, but this also fixed "make headers_check", so don't revert it. Signed-off-by: Loïc Minier <loic.minier@linaro.org> Tested-by: Arnd Bergmann <arnd.bergmann@linaro.org> Cc: Lukas Czerner <lczerner@redhat.com> Cc: Dmitry Monakhov <dmonakhov@openvz.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25leds: fix bug with reading NAS SS4200 dmi codeSteven Rostedt
While running randconfg with ktest.pl I stumbled upon this bug: BUG: unable to handle kernel NULL pointer dereference at 0000000000000003 IP: [<ffffffff815fe44f>] strstr+0x39/0x86 PGD 0 Oops: 0000 [#1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 1, comm: swapper Not tainted 2.6.37-rc1-test+ #6 DG965MQ/ RIP: 0010:[<ffffffff815fe44f>] [<ffffffff815fe44f>] strstr+0x39/0x86 RSP: 0018:ffff8800797cbd80 EFLAGS: 00010213 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffffffffffff RDX: 0000000000000000 RSI: ffffffff82eb7ac9 RDI: 0000000000000003 RBP: ffff8800797cbda0 R08: ffff880000000003 R09: 0000000000030725 R10: ffff88007d294c00 R11: 0000000000014c00 R12: 0000000000000020 R13: ffffffff82eb7ac9 R14: ffffffffffffffff R15: ffffffff82eb7b08 FS: 0000000000000000(0000) GS:ffff88007d200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000003 CR3: 0000000002a1d000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 1, threadinfo ffff8800797ca000, task ffff8800797d0000) Stack: 00000000000000ba ffffffff82eb7ac9 ffffffff82eb7ab8 00000000000000ba ffff8800797cbdf0 ffffffff81e2050f ffff8800797cbdc0 00000000815f913b ffff8800797cbe00 ffffffff82eb7ab8 0000000000000000 0000000000000000 Call Trace: [<ffffffff81e2050f>] dmi_matches+0x117/0x154 [<ffffffff81e205d7>] dmi_check_system+0x3d/0x8d [<ffffffff82e1ad25>] ? nas_gpio_init+0x0/0x2c8 [<ffffffff82e1ad49>] nas_gpio_init+0x24/0x2c8 [<ffffffff820d750d>] ? wm8350_led_init+0x0/0x20 [<ffffffff82e1ad25>] ? nas_gpio_init+0x0/0x2c8 [<ffffffff810022f7>] do_one_initcall+0xab/0x1b2 [<ffffffff82da749c>] kernel_init+0x248/0x331 [<ffffffff8100e624>] kernel_thread_helper+0x4/0x10 [<ffffffff82da7254>] ? kernel_init+0x0/0x331 Found that the nas_led_whitelist dmi_system_id structure array had no NULL end delimiter, causing the dmi_check_system() loop to read an undefined entry. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Dave Hansen <dave@sr71.net> Acked-by: Richard Purdie <rpurdie@linux.intel.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-24ARM: 6482/2: Fix find_next_zero_bit and related assemblyJames Jones
The find_next_bit, find_first_bit, find_next_zero_bit and find_first_zero_bit functions were not properly clamping to the maxbit argument at the bit level. They were instead only checking maxbit at the byte level. To fix this, add a compare and a conditional move instruction to the end of the common bit-within-the- byte code used by all the functions and be sure not to clobber the maxbit argument before it is used. Cc: <stable@kernel.org> Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: James Jones <jajones@nvidia.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-24arch/tile: fix memchr() not to dereference memory for zero lengthChris Metcalf
This change fixes a bug that memchr() will read the first word of the source even if the length is zero. Ironically, the code was originally written with a test to avoid exactly this problem, but to make the code conform to Linux coding standards with all declarations preceding all statements, the first load from memory was moved up above that test as the initial value for a variable. The change just moves all the variable declarations to the top of the file, with no initializers, so that the test can also be at the top of the file. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2010-11-24arch/tile: make glibc's sysconf(_SC_NPROCESSORS_CONF) work correctlyChris Metcalf
glibc assumes that it can count /sys/devices/system/cpu/cpu* to get the number of configured cpus. For this to be valid on tile, we need to generate a "cpu" entry for all cpus, including the ones that are not currently allocated for Linux's use. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2010-11-24Merge branch 'master' into for-linusChris Metcalf
2010-11-24pci root complex: support for tile architectureChris Metcalf
This change enables PCI root complex support for TILEPro. Unlike TILE-Gx, TILEPro has no support for memory-mapped I/O, so the PCI support consists of hypervisor upcalls for PIO, DMA, etc. However, the performance is fine for the devices we have tested with so far (1Gb Ethernet, SATA, etc.). The <asm/io.h> header was tweaked to be a little bit more aggressive about disabling attempts to map/unmap IO port space. The hacky <asm/pci-bridge.h> header was rolled into the <asm/pci.h> header and the result was simplified. Both of the latter two headers were preliminary versions not meant for release before now - oh well. There is one quirk for our TILEmpower platform, which accidentally negotiates up to 5GT and needs to be kicked down to 2.5GT. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2010-11-24drivers/net/tile/: on-chip network drivers for the tile architectureChris Metcalf
This change adds the first network driver for the tile architecture, supporting the on-chip XGBE and GBE shims. The infrastructure is present for the TILE-Gx networking drivers (another three source files in the new directory) but for now the the actual tilegx sources are waiting on releasing hardware to initial customers. Note that arch/tile/include/hv/* are "upstream" headers from the Tilera hypervisor and will probably benefit less from LKML review. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2010-11-24xen: remove duplicated #includeHuang Weiyi
Remove duplicated #include('s) in arch/x86/xen/setup.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2010-11-24xen: x86/32: perform initial startup on initial_page_tableIan Campbell
Only make swapper_pg_dir readonly and pinned when generic x86 architecture code (which also starts on initial_page_table) switches to it. This helps ensure that the generic setup paths work on Xen unmodified. In particular clone_pgd_range writes directly to the destination pgd entries and is used to initialise swapper_pg_dir so we need to ensure that it remains writeable until the last possible moment during bring up. This is complicated slightly by the need to avoid sharing kernel PMD entries when running under Xen, therefore the Xen implementation must make a copy of the kernel PMD (which is otherwise referred to by both intial_page_table and swapper_pg_dir) before switching to swapper_pg_dir. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2010-11-24sisfb: delete osdef.hAaro Koskinen
The file is not needed. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-24sisfb: move the CONFIG warning to sis_main.cAaro Koskinen
sis_main.c is always compiled, so we can check Kconfig options there. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-24sisfb: replace SiS_SetMemory with memset_ioAaro Koskinen
Get rid of one more wrapper. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-24sisfb: remove InPort/OutPort wrappersAaro Koskinen
Remove register IO wrappers. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-24sisfb: use CONFIG_FB_SIS_301/315 instead of SIS301/315HAaro Koskinen
There is no need to alias CONFIG #defines. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-24sisfb: delete redudant #define SIS_LINUX_KERNELAaro Koskinen
It's not needed anymore with SIS_XORG_XF86 gone. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org>