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* account_steal_time: kill the unneeded account_group_system_time()Oleg Nesterov2008-11-17
| | | | | | | | | | | Impact: remove unnecessary accounting call I don't actually understand account_steal_time() and I failed to find the commit which added account_group_system_time(), but this looks bogus. In any case rq->idle must be single-threaded, so it can't have ->totals. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched, signals: fix the racy usage of ->signal in ↵Oleg Nesterov2008-11-17
| | | | | | | | | | | | | | | | | | | | | account_group_xxx/run_posix_cpu_timers Impact: fix potential NULL dereference Contrary to ad474caca3e2a0550b7ce0706527ad5ab389a4d4 changelog, other acct_group_xxx() helpers can be called after exit_notify() by timer tick. Thanks to Roland for pointing out this. Somehow I missed this simple fact when I read the original patch, and I am afraid I confused Frank during the discussion. Sorry. Fortunately, these helpers work with current, we can check ->exit_state to ensure that ->signal can't go away under us. Also, add the comment and compiler barrier to account_group_exec_runtime(), to make sure we load ->signal only once. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: fix kernel warning on /proc/sched_debug accessIngo Molnar2008-11-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Luis Henriques reported that with CONFIG_PREEMPT=y + CONFIG_PREEMPT_DEBUG=y + CONFIG_SCHED_DEBUG=y + CONFIG_LATENCYTOP=y enabled, the following warning triggers when using latencytop: > [ 775.663239] BUG: using smp_processor_id() in preemptible [00000000] code: latencytop/6585 > [ 775.663303] caller is native_sched_clock+0x3a/0x80 > [ 775.663314] Pid: 6585, comm: latencytop Tainted: G W 2.6.28-rc4-00355-g9c7c354 #1 > [ 775.663322] Call Trace: > [ 775.663343] [<ffffffff803a94e4>] debug_smp_processor_id+0xe4/0xf0 > [ 775.663356] [<ffffffff80213f7a>] native_sched_clock+0x3a/0x80 > [ 775.663368] [<ffffffff80213e19>] sched_clock+0x9/0x10 > [ 775.663381] [<ffffffff8024550d>] proc_sched_show_task+0x8bd/0x10e0 > [ 775.663395] [<ffffffff8034466e>] sched_show+0x3e/0x80 > [ 775.663408] [<ffffffff8031039b>] seq_read+0xdb/0x350 > [ 775.663421] [<ffffffff80368776>] ? security_file_permission+0x16/0x20 > [ 775.663435] [<ffffffff802f4198>] vfs_read+0xc8/0x170 > [ 775.663447] [<ffffffff802f4335>] sys_read+0x55/0x90 > [ 775.663460] [<ffffffff8020c67a>] system_call_fastpath+0x16/0x1b > ... This breakage was caused by me via: 7cbaef9: sched: optimize sched_clock() a bit Change the calls to cpu_clock(). Reported-by: Luis Henriques <henrix@sapo.pt>
* sched: correct sched-rt-group.txt pathname in init/KconfigAdrian Knoth2008-11-13
| | | | | | | | | | | init/Kconfig directs the user to Documentation/sched-rt-group.txt, but the file is actually in Documentation/scheduler/sched-rt-group.txt. This patch corrects the pathname mentioned in init/Kconfig. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds2008-11-12
|\ | | | | | | | | | | | | | | 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: fix init_idle()'s use of sched_clock() sched: fix stale value in average load per task
| * sched: fix init_idle()'s use of sched_clock()Ingo Molnar2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maciej Rutecki reported: > I have this bug during suspend to disk: > > [ 188.592151] Enabling non-boot CPUs ... > [ 188.592151] SMP alternatives: switching to SMP code > [ 188.666058] BUG: using smp_processor_id() in preemptible > [00000000] > code: suspend_to_disk/2934 > [ 188.666064] caller is native_sched_clock+0x2b/0x80 Which, as noted by Linus, was caused by me, via: 7cbaef9c "sched: optimize sched_clock() a bit" Move the rq locking a bit earlier in the initialization sequence, that will make the sched_clock() call in init_idle() non-preemptible. Reported-by: Maciej Rutecki <maciej.rutecki@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * sched: fix stale value in average load per taskBalbir Singh2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix load balancer load average calculation accuracy cpu_avg_load_per_task() returns a stale value when nr_running is 0. It returns an older stale (caculated when nr_running was non zero) value. This patch returns and sets rq->avg_load_per_task to zero when nr_running is 0. Compile and boot tested on a x86_64 box. Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | c2port: add c2port support for Eurotech Duramar 2150Rodolfo Giometti2008-11-12
| | | | | | | | | | | | | | Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Add c2 port supportRodolfo Giometti2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | C2port implements a two wire serial communication protocol (bit banging) designed to enable in-system programming, debugging, and boundary-scan testing on low pin-count Silicon Labs devices. Currently this code supports only flash programming through sysfs interface but extensions shoud be easy to add. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hdq: documentation for OMAP HDQMadhusudhan Chikkature2008-11-12
| | | | | | | | | | | | | | | | | | Add a brief document about omap2430/3430 HDQ/1-wire driver. Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hdq: bQ27000 HDQ Slave Interface DriverMadhusudhan Chikkature2008-11-12
| | | | | | | | | | | | | | | | | | Provide the BQ27000 slave interface driver. Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hdq driver for OMAP2430/3430Madhusudhan Chikkature2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The HDQ/1-Wire module of TI OMAP2430/3430 platforms implement the hardware protocol of the master functions of the Benchmark HDQ and the Dallas Semiconductor 1-Wire protocols. These protocols use a single wire for communication between the master (HDQ/1-Wire controller) and the slave (HDQ/1-Wire external compliant device). This patch provides the HDQ driver to suppport TI OMAP2430/3430 platforms. Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com> Acked-by: Felipe Balbi <felipe.balbi@nokia.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | w1: export w1_read_8 functionMadhusudhan Chikkature2008-11-12
| | | | | | | | | | | | | | | | | | | | | | Export the w1_read_8 function for use of drivers. The OMAP HDQ driver(drivers/w1/masters/omap_hdq.c) uses this function. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | rtc: add Dallas DS1390/93/94 RTC chipsMark Jackson2008-11-12
| | | | | | | | | | | | | | | | | | | | Add support for the Dallas DS1390/93/94 SPI RTC chip. Signed-off-by: Mark Jackson <mpfj@mimc.co.uk> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | rtc: basic implementation of Epson RX-8581 I2C Real Time ClockMartyn Welch2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Provide the basic "get" and "set" functionality for the Epson RX-8581 I2C RTC. It currently does not support the RTC's Alarm or Fixed-cycle timer. [akpm@linux-foundation.org: need log2.h for ilog2(), remove unneeded initialisation] Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | rtc: rtc-wm8350: add support for WM8350 RTCMark Brown2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for the RTC provided by the Wolfson Microelectronics WM8350. This driver was originally written by Graeme Gregory and Liam Girdwood, though it has been modified since then to update it to current mainline coding standards and for API completeness. [akpm@linux-foundation.org: s/schedule_timeout_interruptible/schedule_timeout_uninterruptible/ to prevent bogus timeout when signal_pending()] Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: Liam Girdwood <linux@wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ics932s401: new clock generator chip driverDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | The ics932s401 is a clock generator chip. This driver allows users to read the current clock outputs. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | adt7462: new hwmon driverDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | | | New driver to play with. As Jean mentioned a couple of years ago, this chip is a beast with odd combinations of 8 fans, 4 temperatures, and 13 voltage sensors. This driver has been tested on an IntelliStation Z30. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | LIS3LV02Dx Accelerometer driverPavel Machek2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a driver to the accelerometer sensor found in several HP laptops (under the commercial names of "HP Mobile Data Protection System 3D" and "HP 3D driveguard"). It tries to have more or less the same interfaces as the hdaps and other accelerometer drivers: in sysfs and as a joystick. This driver was first written by Yan Burman. Eric Piel has updated it and slimed it up (including the removal of an interface to access to the free-fall feature of the sensor because it is not reliable enough for now). Pavel Machek removed few more features and switched locking from semaphore to mutex. Several people have contributed to the database of the axes. [eric.piel@tremplin-utc.net: LIS3LV02D: Conform to the new ACPI API] Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Yan Burman <burman.yan@gmail.com> Signed-off-by: Pavel Machek <pavel@suse.cz> Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | memcg: bugfix for memory hotplugKAMEZAWA Hiroyuki2008-11-12
| | | | | | | | | | | | | | | | | | | | The start pfn calculation in page_cgroup's memory hotplug notifier chain is wrong. Tested-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: 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>
* | ext3: Clean up outdated and incorrect comment for ext3_write_super()Theodore Tso2008-11-12
| | | | | | | | | | | | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atmel_spi: work-around required for new HW bug in AT91SAM9263 Rev.B SPI ↵Jean-Christophe Lallemand2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | controller We're working with an AT91SAM9263 Rev B in our design and I experienced some inconsistency in spi-based touchscreen usage between our board and the Atmel evaluation kit we have that runs on a Rev A chip. The data was apparently delayed by 1 byte and got ridiculous data out of the touchscreen driver, very strange. As everything looked normal in the spi, touchscreen and dma logs, I contacted the Atmel support and they triggered me on a new HW bug that appeared in the Rev B SPI controller. The problem is that the SPI controller on the Rev B needs that the software reset is performed two times so that it's performed correctly. Applying the patch below solves the issue on my Rev B board. I've tested it as well on my Rev A evaluation kit and it has apparently no unwanted side effect, things continue to work as expected. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lm85: support adt7468 chipsDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | The adt7468 is a follow-on to the adt7463, so plumb in adt7468 support along the same code paths. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | adt7473: check inputs from sysfs writesDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Implement correct range checking for adt7470 to prevent userland from writing impossible values into the chip, and cap out-of-range values per standard hwmon conventions. Implement correct rounding of input values per standard hwmon conventions. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | adt7470: check input range when sysfs files are writtenDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Implement correct range checking for adt7470 to prevent userland from writing impossible values into the chip, and cap out-of-range values per standard hwmon conventions. Implement correct rounding of input values per standard hwmon conventions. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor buildsAndrew Morton2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | We only need the cacheline padding on SMP kernels. Saves 6k: text data bss dec hex filename 5713 388 8840 14941 3a5d kernel/kprobes.o 5713 388 2632 8733 221d kernel/kprobes.o Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | DOC: update xip method infoMarco Stornelli2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | xip documentation updated: - change "get_xip_page" to "get_xip_mem"; - explain changed function parameters Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | DOC: add printk-formats.txtRandy Dunlap2008-11-12
| | | | | | | | | | | | | | | | | | | | Add printk-formats.txt so that we don't have to keep fixing the same things over and over again. <wishful thinking> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | remove ratelimt()Andrew Morton2008-11-12
| | | | | | | | | | | | | | | | | | It mistakenly assumes that a static local in an inlined function is a kernel-wide singleton. It also has no callers, so let's remove it. Cc: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | vfs: fix shrink_submountsEric W. Biederman2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the last refactoring of shrink_submounts a variable was not completely renamed. So finish the renaming of mnt to m now. Without this if you attempt to mount an nfs mount that has both automatic nfs sub mounts on it, and has normal mounts on it. The unmount will succeed when it should not. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Al Viro <viro@ZenIV.linux.org.uk Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | mm: remove lru_add_drain_all() from the munlock pathKOSAKI Motohiro2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lockdep warns about following message at boot time on one of my test machine. Then, schedule_on_each_cpu() sholdn't be called when the task have mmap_sem. Actually, lru_add_drain_all() exist to prevent the unevictalble pages stay on reclaimable lru list. but currenct unevictable code can rescue unevictable pages although it stay on reclaimable list. So removing is better. In addition, this patch add lru_add_drain_all() to sys_mlock() and sys_mlockall(). it isn't must. but it reduce the failure of moving to unevictable list. its failure can rescue in vmscan later. but reducing is better. Note, if above rescuing happend, the Mlocked and the Unevictable field mismatching happend in /proc/meminfo. but it doesn't cause any real trouble. ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.28-rc2-mm1 #2 ------------------------------------------------------- lvm/1103 is trying to acquire lock: (&cpu_hotplug.lock){--..}, at: [<c0130789>] get_online_cpus+0x29/0x50 but task is already holding lock: (&mm->mmap_sem){----}, at: [<c01878ae>] sys_mlockall+0x4e/0xb0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_sem){----}: [<c0153da2>] check_noncircular+0x82/0x110 [<c0185e6a>] might_fault+0x4a/0xa0 [<c0156161>] validate_chain+0xb11/0x1070 [<c0185e6a>] might_fault+0x4a/0xa0 [<c0156923>] __lock_acquire+0x263/0xa10 [<c015714c>] lock_acquire+0x7c/0xb0 (*) grab mmap_sem [<c0185e6a>] might_fault+0x4a/0xa0 [<c0185e9b>] might_fault+0x7b/0xa0 [<c0185e6a>] might_fault+0x4a/0xa0 [<c0294dd0>] copy_to_user+0x30/0x60 [<c01ae3ec>] filldir+0x7c/0xd0 [<c01e3a6a>] sysfs_readdir+0x11a/0x1f0 (*) grab sysfs_mutex [<c01ae370>] filldir+0x0/0xd0 [<c01ae370>] filldir+0x0/0xd0 [<c01ae4c6>] vfs_readdir+0x86/0xa0 (*) grab i_mutex [<c01ae75b>] sys_getdents+0x6b/0xc0 [<c010355a>] syscall_call+0x7/0xb [<ffffffff>] 0xffffffff -> #2 (sysfs_mutex){--..}: [<c0153da2>] check_noncircular+0x82/0x110 [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c0156161>] validate_chain+0xb11/0x1070 [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c0156923>] __lock_acquire+0x263/0xa10 [<c015714c>] lock_acquire+0x7c/0xb0 (*) grab sysfs_mutex [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c04f8b55>] mutex_lock_nested+0xa5/0x2f0 [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0 [<c01e422f>] create_dir+0x3f/0x90 [<c01e42a9>] sysfs_create_dir+0x29/0x50 [<c04faaf5>] _spin_unlock+0x25/0x40 [<c028f21d>] kobject_add_internal+0xcd/0x1a0 [<c028f37a>] kobject_set_name_vargs+0x3a/0x50 [<c028f41d>] kobject_init_and_add+0x2d/0x40 [<c019d4d2>] sysfs_slab_add+0xd2/0x180 [<c019d580>] sysfs_add_func+0x0/0x70 [<c019d5dc>] sysfs_add_func+0x5c/0x70 (*) grab slub_lock [<c01400f2>] run_workqueue+0x172/0x200 [<c014008f>] run_workqueue+0x10f/0x200 [<c0140bd0>] worker_thread+0x0/0xf0 [<c0140c6c>] worker_thread+0x9c/0xf0 [<c0143c80>] autoremove_wake_function+0x0/0x50 [<c0140bd0>] worker_thread+0x0/0xf0 [<c0143972>] kthread+0x42/0x70 [<c0143930>] kthread+0x0/0x70 [<c01042db>] kernel_thread_helper+0x7/0x1c [<ffffffff>] 0xffffffff -> #1 (slub_lock){----}: [<c0153d2d>] check_noncircular+0xd/0x110 [<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 [<c0156161>] validate_chain+0xb11/0x1070 [<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 [<c015433d>] mark_lock+0x35d/0xd00 [<c0156923>] __lock_acquire+0x263/0xa10 [<c015714c>] lock_acquire+0x7c/0xb0 [<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 [<c04f93a3>] down_read+0x43/0x80 [<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 (*) grab slub_lock [<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 [<c04fd9ac>] notifier_call_chain+0x3c/0x70 [<c04f5454>] _cpu_up+0x84/0x110 [<c04f552b>] cpu_up+0x4b/0x70 (*) grab cpu_hotplug.lock [<c06d1530>] kernel_init+0x0/0x170 [<c06d15e5>] kernel_init+0xb5/0x170 [<c06d1530>] kernel_init+0x0/0x170 [<c01042db>] kernel_thread_helper+0x7/0x1c [<ffffffff>] 0xffffffff -> #0 (&cpu_hotplug.lock){--..}: [<c0155bff>] validate_chain+0x5af/0x1070 [<c040f7e0>] dev_status+0x0/0x50 [<c0156923>] __lock_acquire+0x263/0xa10 [<c015714c>] lock_acquire+0x7c/0xb0 [<c0130789>] get_online_cpus+0x29/0x50 [<c04f8b55>] mutex_lock_nested+0xa5/0x2f0 [<c0130789>] get_online_cpus+0x29/0x50 [<c0130789>] get_online_cpus+0x29/0x50 [<c017bc30>] lru_add_drain_per_cpu+0x0/0x10 [<c0130789>] get_online_cpus+0x29/0x50 (*) grab cpu_hotplug.lock [<c0140cf2>] schedule_on_each_cpu+0x32/0xe0 [<c0187095>] __mlock_vma_pages_range+0x85/0x2c0 [<c0156945>] __lock_acquire+0x285/0xa10 [<c0188f09>] vma_merge+0xa9/0x1d0 [<c0187450>] mlock_fixup+0x180/0x200 [<c0187548>] do_mlockall+0x78/0x90 (*) grab mmap_sem [<c01878e1>] sys_mlockall+0x81/0xb0 [<c010355a>] syscall_call+0x7/0xb [<ffffffff>] 0xffffffff other info that might help us debug this: 1 lock held by lvm/1103: #0: (&mm->mmap_sem){----}, at: [<c01878ae>] sys_mlockall+0x4e/0xb0 stack backtrace: Pid: 1103, comm: lvm Not tainted 2.6.28-rc2-mm1 #2 Call Trace: [<c01555fc>] print_circular_bug_tail+0x7c/0xd0 [<c0155bff>] validate_chain+0x5af/0x1070 [<c040f7e0>] dev_status+0x0/0x50 [<c0156923>] __lock_acquire+0x263/0xa10 [<c015714c>] lock_acquire+0x7c/0xb0 [<c0130789>] get_online_cpus+0x29/0x50 [<c04f8b55>] mutex_lock_nested+0xa5/0x2f0 [<c0130789>] get_online_cpus+0x29/0x50 [<c0130789>] get_online_cpus+0x29/0x50 [<c017bc30>] lru_add_drain_per_cpu+0x0/0x10 [<c0130789>] get_online_cpus+0x29/0x50 [<c0140cf2>] schedule_on_each_cpu+0x32/0xe0 [<c0187095>] __mlock_vma_pages_range+0x85/0x2c0 [<c0156945>] __lock_acquire+0x285/0xa10 [<c0188f09>] vma_merge+0xa9/0x1d0 [<c0187450>] mlock_fixup+0x180/0x200 [<c0187548>] do_mlockall+0x78/0x90 [<c01878e1>] sys_mlockall+0x81/0xb0 [<c010355a>] syscall_call+0x7/0xb Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Tested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Hugh Dickins <hugh@veritas.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kprobes: disable preempt for module_text_address() and kernel_text_address()Masami Hiramatsu2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __register_kprobe() can be preempted after checking probing address but before module_text_address() or try_module_get(), and in this interval the module can be unloaded. In that case, try_module_get(probed_mod) will access to invalid address, or kprobe will probe invalid address. This patch uses preempt_disable() to protect it and uses __module_text_address() and __kernel_text_address(). Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | freezer_cg: disable writing freezer.state of root cgroupLi Zefan2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this change, control file 'freezer.state' doesn't exist in root cgroup, making root cgroup unfreezable. I think it's reasonable to disallow freeze tasks in the root cgroup. And then we can avoid fork overhead when freezer subsystem is compiled but not used. Also make writing invalid value to freezer.state returns EINVAL rather than EIO. This is more consistent with other cgroup subsystem. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | freezer_cg: remove task_lock from freezer_fork()Li Zefan2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In theory the task can be moved to another cgroup and the freezer will be freed right after task_lock is dropped, so the lock results in zero protection. But in the case of freezer_fork() no lock is needed, since the task is not in tasklist yet so it won't be moved to another cgroup, so task->cgroups won't be changed or invalidated. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | GPIO: add new Xilinx driver for powerpcJohn Linn2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver supports the Xilinx XPS GPIO IP core which has the typical GPIO features. Signed-off-by: Kiran Sutariya <kirans@xilinx.com> Signed-off-by: John Linn <john.linn@xilinx.com> Cc: David Brownell <david-b@pacbell.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Cc: "Grant Likely" <grant.likely@secretlab.ca> Cc: <avorontsov@ru.mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | cpusets: update mems allowed in page allocatorDavid Rientjes2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If all allowable memory is unreclaimable, it is possible to loop forever in the page allocator for ~__GFP_NORETRY allocations. During this time, it is also possible for a task's cpuset to expand its set of allowable nodes so that it now includes free memory. The cached copy of this set, current->mems_allowed, is stale, however, since there has not been a subsequent call to cpuset_update_task_memory_state(). The cached copy of the set of allowable nodes is now updated in the page allocator's slow path so the additional memory is available to get_page_from_freelist(). [akpm@linux-foundation.org: add comment] Signed-off-by: David Rientjes <rientjes@google.com> Cc: Paul Menage <menage@google.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | i5000-edac: hold reference to mci kobjectDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that edac_mc_del_mc will kobject_put the last kref on the mci object. If the timing is just right, that means that the mci object is freed before before i5000_remove_one has a chance to free the resources associated with it, causing a null pointer exceptions when unloading the driver. Insert a kobject_{get,put} pair so that this doesn't happen. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Fix platform drivers that crash on suspend/resumeDarrick J. Wong2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that if one registers a struct platform_device, the platform device code expects that platform_device.device->driver points to a struct driver inside a struct platform_driver. This is not the case with the ipmi-si, ipmi-msghandler and ibmaem drivers, which causes the suspend/resume hook functions to jump off into nowhere, causing a crash. Make this assumption hold true for these three drivers. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: Corey Minyard <cminyard@mvista.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg KH <greg@kroah.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atmel_lcdfb: change irq_base definition to allow error reportingNicolas Ferre2008-11-12
| | | | | | | | | | | | | | | | | | | | | | Changed because old the definition of unsigned long cannot be negative. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reported-by: Roel Kluin <roel.kluin@gmail.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hwmon: applesmc: add support for Macbook 4Henrik Rydberg2008-11-12
| | | | | | | | | | | | | | | | | | This patch adds accelerometer and temperature sensor support for Macbook 4. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Cc: Nicolas Boichat <nicolas@boichat.ch Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hugetlb: make unmap_ref_private multi-size-awareAdam Litke2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Oops. Part of the hugetlb private reservation code was not fully converted to use hstates. When a huge page must be unmapped from VMAs due to a failed COW, HPAGE_SIZE is used in the call to unmap_hugepage_range() regardless of the page size being used. This works if the VMA is using the default huge page size. Otherwise we might unmap too much, too little, or trigger a BUG_ON. Rare but serious -- fix it. Signed-off-by: Adam Litke <agl@us.ibm.com> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2008-11-12
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: bnx2: fix poll_controller to pass proper structures and check all rx queues niu: Fix readq implementation when architecture does not provide one. hostap: pad the skb->cb usage in lieu of a proper fix rtl8187 : support for Sitecom WL-168 0001 v4 mac80211: fix notify_mac function rtl8187: Add Abocom USB ID net: put_cmsg_compat + SO_TIMESTAMP[NS]: use same name for value as caller tcp_htcp: last_cong bug fix [netdrvr] smc911x: fix for driver resume (and compilation warning) RDMA/cxgb3: deadlock in iw_cxgb3 can cause hang when configuring interface. cxgb3 - Limit multiqueue setting to msi-x cxgb3 - eeprom read fixes myri10ge: fix stop/go ordering even more
| * | bnx2: fix poll_controller to pass proper structures and check all rx queuesNeil Horman2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix bnx2 so that netpoll works properly. Specifically: 1) Fix parameters to bnx2_interrupt to be a struct bnx2_napi rather than a struct net_device 2) Fix poll_controller method to check every queue in the rx case so frames aren't missed Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Merge branch 'master' of ↵David S. Miller2008-11-12
| |\ \ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
| | * | hostap: pad the skb->cb usage in lieu of a proper fixJohannes Berg2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Like mac80211 did, this driver makes 'clever' use of skb->cb to pass information along with an skb as it is requeued from the virtual device to the physical wireless device. Unfortunately, that trick no longer works... Unlike mac80211, code complexity and driver apathy makes this hack the best option we have in the short run. Hopefully someone will eventually be motivated to code a proper fix before all the effected hardware dies. (Above text by me. Johannes officially disavows all knowledge of this hack. -- JWL) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | rtl8187 : support for Sitecom WL-168 0001 v4Bob Jolliffe2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | the Sitecom 0001 v4 with product id 0x0df6:0028, uses Realtek's RTL8187B and work fine with new 2.6.27 driver. Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | mac80211: fix notify_mac functionJohannes Berg2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ieee80211_notify_mac() function uses ieee80211_sta_req_auth() which in turn calls ieee80211_set_disassoc() which calls a few functions that need to be able to sleep, so ieee80211_notify_mac() cannot use RCU locking for the interface list and must use rtnl locking instead. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | rtl8187: Add Abocom USB IDIvan Kuten2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ivan Kuten <ivan.kuten@promwad.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | | niu: Fix readq implementation when architecture does not provide one.David S. Miller2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a TX hang reported by Jesper Dangaard Brouer. When an architecutre cannot provide a fully functional 64-bit atomic readq/writeq, the driver must implement it's own. This is because only the driver can say whether doing something like using two 32-bit reads to implement the full 64-bit read will actually work properly. In particular one of the issues is whether the top 32-bits or the bottom 32-bits of the 64-bit register should be read first. There could be side effects, and in fact that is exactly the problem here. The TX_CS register has counters in the upper 32-bits and state bits in the lower 32-bits. A read clears the state bits. We would read the counter half before the state bit half. That first read would clear the state bits, and then the driver thinks that no interrupts are pending because the interrupt indication state bits are seen clear every time. Fix this by reading the bottom half before the upper half. Tested-by: Jesper Dangaard Brouer <jdb@comx.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net: put_cmsg_compat + SO_TIMESTAMP[NS]: use same name for value as callerPatrick Ohly2008-11-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In __sock_recv_timestamp() the additional SCM_TIMESTAMP[NS] is used. This has the same value as SO_TIMESTAMP[NS], so this is a purely cosmetic change. Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 00:41:50 -0500