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* Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlightLinus Torvalds2009-09-2613-2/+1203
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight: backlight: new driver for ADP5520/ADP5501 MFD PMICs backlight: extend event support to also support poll() backlight/eeepc-laptop: Update the backlight state when we change brightness backlight/acpi: Update the backlight state when we change brightness backlight: Allow drivers to update the core, and generate events on changes backlight: switch to da903x driver to dev_pm_ops backlight: Add support for the Avionic Design Xanthos backlight device. backlight: spi driver for LMS283GF05 LCD backlight: move hp680-bl's probe function to .devinit.text backlight: Add support for new Apple machines. backlight: mbp_nvidia_bl: add support for MacBookAir 1,1 backlight: Add WM831x backlight driver Trivial conflicts due to '#ifdef CONFIG_PM' differences in drivers/video/backlight/da903x_bl.c
| * backlight: new driver for ADP5520/ADP5501 MFD PMICsMichael Hennerich2009-09-263-0/+390
| | | | | | | | | | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: extend event support to also support poll()Henrique de Moraes Holschuh2009-09-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Extend the backlight event support to also allow the use of poll()/select() on actual_brightness. We already have the entire event hookup anyway, adding a single function call in one line to get functionality like that is a really good deal. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight/eeepc-laptop: Update the backlight state when we change brightnessMatthew Garrett2009-09-211-1/+1
| | | | | | | | | | | | | | | | Trigger a status update when the user hits a brightness key, allowing userspace to present appropriate UI. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight/acpi: Update the backlight state when we change brightnessMatthew Garrett2009-09-211-0/+4
| | | | | | | | | | | | | | | | Trigger a status update when we change the brightness in the driver, thus allowing userspace to present appropriate UI. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: Allow drivers to update the core, and generate events on changesMatthew Garrett2009-09-212-0/+48
| | | | | | | | | | | | | | | | | | | | | | | | Certain hardware will send us events when the backlight brightness changes. Add a function to update the value in the core, and additionally send a uevent so that userspace can pop up appropriate UI. The uevents are flagged depending on whether the update originated in the kernel or from userspace, making it easier to only display UI at the appropriate time. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: switch to da903x driver to dev_pm_opsMike Rapoport2009-09-211-10/+10
| | | | | | | | | | Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: Add support for the Avionic Design Xanthos backlight device.Thierry Reding2009-09-073-1/+187
| | | | | | | | | | | | | | | | This patch adds support for the backlight device found on Avionic Design Xanthos-based boards. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: spi driver for LMS283GF05 LCDMarek Vasut2009-09-074-0/+278
| | | | | | | | | | | | | | | | | | | | | | | | ADd support for the SPI part of LMS283GF05 LCD. The LCD uses SPI for initialization and powerdown sequences. No further defails are specified in the datasheet about the initialization/powerdown sequence, just the magic numbers that have to be sent over SPI bus. This LCD can be found in the Aeronix Zipit Z2 handheld. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: move hp680-bl's probe function to .devinit.textUwe Kleine-König2009-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | A pointer to hp680bl_probe is passed to the core via platform_driver_register and so the function must not disappear when the .init sections are discarded. Otherwise (if also having HOTPLUG=y) unbinding and binding a device to the driver via sysfs will result in an oops as does a device being registered late. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Kristoffer Ericson <Kristoffer.Ericson@gmail.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: Add support for new Apple machines.Mario Schwalbe2009-09-071-0/+27
| | | | | | | | | | | | | | | | | | This patch adds support for the new Apple models MacBook 5,1, MacBook Pro 5,1, MacBook Pro 5,2, MacBook Pro 5,5. It's just a device table update. Signed-off-by: Mario Schwalbe <schwalbe@inf.tu-dresden.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: mbp_nvidia_bl: add support for MacBookAir 1,1Henrik Rydberg2009-09-071-0/+9
| | | | | | | | | | | | | | | | | | | | Add LCD backlight support for the Intel GMA965 found in the MacBookAir 1,1. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
| * backlight: Add WM831x backlight driverMark Brown2009-09-073-0/+258
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The WM831x series of PMICs provide DC-DC boost convertors and current sinks which can be used together to drive LEDs for use as backlights. Expose this functionality via the backlight API. Since when used in this configuration the current sink and boost convertor are very tightly coupled with a multi-stage startup for the current sink which overlaps with the boost convertor startup this driver bypasses the regulator API. Machine inititialisation is responsible for ensuring that the regulators are not accessed via both APIs. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* | headers: kref.h reduxAlexey Dobriyan2009-09-269-10/+0
| | | | | | | | | | | | | | | | | | * remove asm/atomic.h inclusion from kref.h -- not needed, linux/types.h is enough for atomic_t * remove linux/kref.h inclusion from files which do not need it. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds2009-09-261-61/+76
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: futex: Add memory barrier commentary to futex_wait_queue_me() futex: Fix wakeup race by setting TASK_INTERRUPTIBLE before queue_me() futex: Correct futex_q woken state commentary futex: Make function kernel-doc commentary consistent futex: Correct queue_me and unqueue_me commentary futex: Correct futex_wait_requeue_pi() commentary
| * | futex: Add memory barrier commentary to futex_wait_queue_me()Darren Hart2009-09-241-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The memory barrier semantics of futex_wait_queue_me() are non-obvious. Add some commentary to try and clarify it. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090924185447.694.38948.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | futex: Fix wakeup race by setting TASK_INTERRUPTIBLE before queue_me()Darren Hart2009-09-221-12/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PI futexes do not use the same plist_node_empty() test for wakeup. It was possible for the waiter (in futex_wait_requeue_pi()) to set TASK_INTERRUPTIBLE after the waker assigned the rtmutex to the waiter. The waiter would then note the plist was not empty and call schedule(). The task would not be found by any subsequeuent futex wakeups, resulting in a userspace hang. By moving the setting of TASK_INTERRUPTIBLE to before the call to queue_me(), the race with the waker is eliminated. Since we no longer call get_user() from within queue_me(), there is no need to delay the setting of TASK_INTERRUPTIBLE until after the call to queue_me(). The FUTEX_LOCK_PI operation is not affected as futex_lock_pi() relies entirely on the rtmutex code to handle schedule() and wakeup. The requeue PI code is affected because the waiter starts as a non-PI waiter and is woken on a PI futex. Remove the crusty old comment about holding spinlocks() across get_user() as we no longer do that. Correct the locking statement with a description of why the test is performed. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053038.8717.97838.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | futex: Correct futex_q woken state commentaryDarren Hart2009-09-221-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use kernel-doc format to describe struct futex_q. Correct the wakeup definition to eliminate the statement about waking the waiter between the plist_del() and the q->lock_ptr = 0. Note in the comment that PI futexes have a different definition of the woken state. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053029.8717.62798.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | futex: Make function kernel-doc commentary consistentDarren Hart2009-09-221-20/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the existing function kernel-doc consistent throughout futex.c, following Documentation/kernel-doc-nano-howto.txt as closely as possible. When unsure, at least be consistent within futex.c. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053022.8717.13339.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | futex: Correct queue_me and unqueue_me commentaryDarren Hart2009-09-221-12/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The queue_me/unqueue_me commentary is oddly placed and out of date. Clean it up and correct the inaccurate bits. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053015.8717.71713.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | futex: Correct futex_wait_requeue_pi() commentaryDarren Hart2009-09-221-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Correct various typos and formatting inconsistencies in the commentary of futex_wait_requeue_pi(). Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922052958.8717.21932.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2009-09-268-69/+119
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 tools: Dont use openat() perf tools: Fix buffer allocation perf tools: .gitignore += perf*.html perf tools: Handle relative paths while loading module symbols perf tools: Fix module symbol loading bug perf_event, x86: Fix 'perf sched record' crashing the machine perf_event: Update PERF_EVENT_FORK header definition perf stat: Fix zero total printouts
| * | | perf tools: Dont use openat()Eric Dumazet2009-09-241-29/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | openat() is still a young glibc facility, better to not use it in a non performance critical program (perf list) Many machines have older glibc (RHEL 4 Update 5 -> glibc-2.3.4-2.36 on my dev machine for example). Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ulrich Drepper <drepper@redhat.com> LKML-Reference: <4ABB767D.6080004@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf tools: Fix buffer allocationEric Dumazet2009-09-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "perf top" cores dump on my dev machine, if run from a directory where vmlinux is present: *** glibc detected *** malloc(): memory corruption: 0x085670d0 *** Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: <stable@kernel.org> LKML-Reference: <4ABB6EB7.7000002@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf tools: .gitignore += perf*.htmlKirill Smelkov2009-09-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've tried building the docs in tools/perf/Documentation/ , and after that `git status` showed dozen of untracked htmls. Let's ignore them. Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru> LKML-Reference: <1253790022-10300-1-git-send-email-kirr@mns.spb.ru> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf tools: Handle relative paths while loading module symbolsMike Galbraith2009-09-241-30/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Inform util/module.c::mod_dso__load_module_paths() that relative paths do exist in some modules.dep, and make it fail noisily should it encounter a path that it doesn't understand, or a module it cannot open. Reported-by: Avi Kivity <avi@redhat.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: rostedt@goodmis.org Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <1253779628.10513.8.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf tools: Fix module symbol loading bugMike Galbraith2009-09-231-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avi Kivity reported 'perf annotate' failures with modules, the requested function was not annotated. If there are no modules currently loaded, or the last module scanned is not loaded, dso__load_modules() steps on the value from dso__load_vmlinux(), so we happily load the kallsyms symbols on top of what we've already loaded. Fix that such that the total count of symbols loaded is returned. Should module symbol load fail after parsing of vmlinux, is's a hard failure, so do not silently fall-back to kallsyms. Reported-by: Avi Kivity <avi@redhat.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: rostedt@goodmis.org Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <1253697658.11461.36.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_event, x86: Fix 'perf sched record' crashing the machinePeter Zijlstra2009-09-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Chris Malley reported that 'perf sched record' sometimes crashes his box with: [ 389.272175] BUG: unable to handle kernel paging request at ffffb300 [ 389.272294] IP: [<c011b0bd>] default_send_IPI_self+0x1d/0x50 [ 389.272366] *pde = 0073f067 *pte = 00000000 [ 389.274708] Call Trace: [ 389.274752] [<c010e3b4>] ? set_perf_event_pending+0x14/0x20 [ 389.274801] [<c01b9751>] ? perf_output_unlock+0x121/0x1a0 [ 389.274848] [<c01b981a>] ? perf_output_end+0x4a/0x70 [ 389.274893] [<c01ba690>] ? __perf_event_overflow+0x240/0x2f0 [ 389.274942] [<c030963e>] ? atomic64_cmpxchg+0x1e/0x30 [ 389.274988] [<c01ba8f4>] ? perf_swevent_ctx_event+0x1b4/0x1c0 [ 389.275035] [<c01ba773>] ? perf_swevent_ctx_event+0x33/0x1c0 [ 389.275081] [<c01ba9a7>] ? do_perf_sw_event+0xa7/0x160 [ 389.275127] [<c01baae2>] ? perf_tp_event+0x82/0xa0 [ 389.275174] [<c012e9c6>] ? ftrace_profile_sched_stat_runtime+0xe6/0x120 [ 389.275224] [<c012e8e0>] ? ftrace_profile_sched_stat_runtime+0x0/0x120 [ 389.275273] [<c013c85a>] ? update_curr+0x18a/0x230 [ 389.275318] [<c013cdc5>] ? put_prev_task_fair+0x155/0x160 [ 389.275366] [<c01618b5>] ? sched_clock_cpu+0xd5/0x110 [ 389.275413] [<c04e7525>] ? _spin_lock_irq+0x45/0x50 [ 389.275458] [<c04e424e>] ? schedule+0x20e/0xb10 The problem is that the box has no lapic enabled: [ 0.042445] Local APIC not detected. Using dummy APIC emulation. The below seems like the best fix. We disabled all lapic bits, except the self-IPI-resend logic. Reported-by: Chris Malley <mail@chrismalley.co.uk> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <7863dc4c0909221409v7893bfd3o4b590d5951a233ba@mail.gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_event: Update PERF_EVENT_FORK header definitionAnton Blanchard2009-09-222-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PERF_EVENT_FORK always outputs the time field, so update the header to reflect this. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20090922123424.GD19453@kryten> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf stat: Fix zero total printoutsIngo Molnar2009-09-221-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before: 0 sched:sched_switch # nan M/sec After: 0 sched:sched_switch # 0.000 M/sec Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2009-09-261-4/+0
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: clocksource: Resume clocksource without taking the clocksource mutex
| * | | | clocksource: Resume clocksource without taking the clocksource mutexMartin Schwidefsky2009-09-241-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git commit 75c5158f70c065b9 converted the clocksource spinlock to a mutex. This causes the following BUG: BUG: sleeping function called from invalid context at kernel/mutex.c:280 in_atomic(): 0, irqs_disabled(): 1, pid: 2473, name: pm-suspend 2 locks held by pm-suspend/2473: #0: (&buffer->mutex){......}, at: [<ffffffff8115ab13>] sysfs_write_file+0x3c/0x137 #1: (pm_mutex){......}, at: [<ffffffff810865b5>] enter_state+0x39/0x130 Pid: 2473, comm: pm-suspend Not tainted 2.6.31 #1 Call Trace: [<ffffffff810792f0>] ? __debug_show_held_locks+0x22/0x24 [<ffffffff8104a2ef>] __might_sleep+0x107/0x10b [<ffffffff8141fca9>] mutex_lock_nested+0x25/0x43 [<ffffffff81073537>] clocksource_resume+0x1c/0x60 [<ffffffff81072902>] timekeeping_resume+0x1e/0x1c8 [<ffffffff812aee62>] __sysdev_resume+0x25/0xcf [<ffffffff812aef79>] sysdev_resume+0x6d/0xae [<ffffffff810864f8>] suspend_devices_and_enter+0x12b/0x1af [<ffffffff8108665b>] enter_state+0xdf/0x130 [<ffffffff81085dc3>] state_store+0xb6/0xd3 [<ffffffff81204c73>] kobj_attr_store+0x17/0x19 [<ffffffff8115abd2>] sysfs_write_file+0xfb/0x137 [<ffffffff811057d2>] vfs_write+0xae/0x10b [<ffffffff81208392>] ? __up_read+0x1a/0x7f [<ffffffff811058ef>] sys_write+0x4a/0x6e [<ffffffff81011b82>] system_call_fastpath+0x16/0x1b clocksource_resume is called early in the resume process, there is only one cpu, no processes are running and the interrupts are disabled. It is therefore possible to resume the clocksources without taking the clocksource mutex. Reported-by: Xiaotian Feng <xtfeng@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Tested-by: Michal Schmidt <mschmidt@redhat.com> Cc: Xiaotian Feng <xtfeng@gmail.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090924172952.49697825@mschwide.boeblingen.de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds2009-09-266-19/+20
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: modules, tracing: Remove stale struct marker signature from module_layout() tracing/workqueue: Use %pf in workqueue trace events tracing: Fix a comment and a trivial format issue in tracepoint.h tracing: Fix failure path in ftrace_regex_open() tracing: Fix failure path in ftrace_graph_write() tracing: Check the return value of trace_get_user() tracing: Fix off-by-one in trace_get_user()
| * | | | | modules, tracing: Remove stale struct marker signature from module_layout()Ingo Molnar2009-09-231-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linus reported this new build warning: kernel/module.c:2951: warning: ?struct marker? declared inside parameter list kernel/module.c:2951: warning: its scope is only this definition or declaration, which is probably not what you want Caused by: fc53776: tracing: Remove markers module_layout() is an artificial symbol with 'significant' symbols listed in its argument list so that it gets a proper argument types signature that modversions can pick up to decide whether a module is version-compatible or not. If these dont match then we wont even look at a module. Remove the stale marker symbol. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <alpine.LFD.2.01.0909210908020.4950@localhost.localdomain> Cc: Christoph Hellwig <hch@lst.de> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | tracing/workqueue: Use %pf in workqueue trace eventsAnton Blanchard2009-09-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using %pf instead of %pF supresses printing of the function offset which will always be 0 in the case of worklet functions. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Zhaolei <zhaolei@cn.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20090922024033.GB31801@kryten> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | | | | tracing: Fix a comment and a trivial format issue in tracepoint.hLi Hong2009-09-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the tracepoint documentation path in tracepoints headers and a misaligned tabulation. Signed-off-by: Li Hong <lihong.hi@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> LKML-Reference: <3a3680030909220300h7cf18849q4d4702b9d4feaa67@mail.gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | | | | tracing: Fix failure path in ftrace_regex_open()Li Zefan2009-09-221-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't forget to free trace_parser if seq_open() returned failure. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AB86694.4040803@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | tracing: Fix failure path in ftrace_graph_write()Li Zefan2009-09-221-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't call trace_parser_put() on uninitialized trace_parser. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AB86639.3000003@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | tracing: Check the return value of trace_get_user()Li Zefan2009-09-222-9/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Return immediately if trace_get_user() returned failure. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AB86614.7020803@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | tracing: Fix off-by-one in trace_get_user()Li Zefan2009-09-221-1/+1
| | |_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Leave the last slot for the tailing '\0'. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AB865FA.5080801@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-09-2619-188/+180
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Remove redundant non-NUMA topology functions x86: early_printk: Protect against using the same device twice x86: Reduce verbosity of "PAT enabled" kernel message x86: Reduce verbosity of "TSC is reliable" message x86: mce: Use safer ways to access MCE registers x86: mce, inject: Use real inject-msg in raise_local x86: mce: Fix thermal throttling message storm x86: mce: Clean up thermal throttling state tracking code x86: split NX setup into separate file to limit unstack-protected code xen: check EFER for NX before setting up GDT mapping x86: Cleanup linker script using new linker script macros. x86: Use section .data.page_aligned for the idt_table. x86: convert to use __HEAD and HEAD_TEXT macros. x86: convert compressed loader to use __HEAD and HEAD_TEXT macros. x86: fix fragile computation of vsyscall address
| * \ \ \ \ Merge branch 'x86/asm' into x86/urgentIngo Molnar2009-09-257-76/+25
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: The linker script cleanups are ready for upstream. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | | x86: Cleanup linker script using new linker script macros.Tim Abbott2009-09-181-44/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Tim Abbott <tabbott@ksplice.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * | | | | x86: Use section .data.page_aligned for the idt_table.Tim Abbott2009-09-182-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The .data.idt section is just squashed into the .data.page_aligned output section by the linker script anyway, so it might as well be in the .data.page_aligned section. This eliminates all references to .data.idt on x86. Signed-off-by: Tim Abbott <tabbott@ksplice.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * | | | | x86: convert to use __HEAD and HEAD_TEXT macros.Tim Abbott2009-09-183-11/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This has the consequence of changing the section name use for head code from ".text.head" to ".head.text". It also eliminates the ".text.head" output section (instead placing head code at the start of the .text output section), which should be harmless. This patch only changes the sections in the actual kernel, not those in the compressed boot loader. Signed-off-by: Tim Abbott <tabbott@ksplice.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * | | | | x86: convert compressed loader to use __HEAD and HEAD_TEXT macros.Tim Abbott2009-09-183-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This has the consequence of changing the section name use for head code from ".text.head" to ".head.text". Linus suggested that we merge the ".text.head" section with ".text" (presumably while preserving the fact that the head code starts at 0). When I tried this it caused the kernel to not boot. Signed-off-by: Tim Abbott <tabbott@ksplice.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * | | | | x86: fix fragile computation of vsyscall addressAnders Kaseorg2009-09-181-12/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously, the address of the vsyscall page (VSYSCALL_PHYS_ADDR, VSYSCALL_VIRT_ADDR) was computed by arithmetic on the address of the last section. This leads to bugs when new sections are inserted, such as the one fixed by commit d312ceda567ab91acd756cde95ac5fbc6b40ed40. Let's compute it from the current address instead. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | x86: Remove redundant non-NUMA topology functionsRusty Russell2009-09-241-10/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/x86/include/asm/topology.h declares inline fns cpu_to_node and cpumask_of_node for !NUMA, even though they are then declared as macros by asm-generic/topology.h, which is #included just below. The macros (which are the same) end up being used; these functions are just confusing. Noticed-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: "Greg Kroah-Hartman" <gregkh@suse.de> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Tejun Heo <tj@kernel.org> LKML-Reference: <200909241748.45629.rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | x86: early_printk: Protect against using the same device twiceJason Wessel2009-09-241-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you use the kernel argument: earlyprintk=serial,ttyS0,115200 This will cause a recursive hang printing the same line again and again: BIOS-e820: 000000003fff3000 - 0000000040000000 (ACPI data) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) bootconsole [earlyser0] enabled Linux version 2.6.31-07863-gb64ada6 (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #16789 SMP Wed Sep 23 21:09:43 CEST 2009 Linux version 2.6.31-07863-gb64ada6 (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #16789 SMP Wed Sep 23 21:09:43 CEST 2009 Linux version 2.6.31-07863-gb64ada6 (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #16789 SMP Wed Sep 23 21:09:43 CEST 2009 Linux version 2.6.31-07863-gb64ada6 (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #16789 SMP Wed Sep 23 21:09:43 CEST 2009 Linux version 2.6.31-07863-gb64ada6 (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #16789 SMP Wed Sep 23 21:09:43 CEST 2009 Instead warn the end user that they specified the device a second time, and ignore that second console. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <gregkh@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <4ABAAB89.1080407@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | Merge branch 'linus' into x86/urgentIngo Molnar2009-09-241467-22115/+71938
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: Queueing up dependent early-printk fix. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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