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* sched, nohz: Track nr_busy_cpus in the sched_group_powerSuresh Siddha2011-12-065-0/+48
| | | | | | | | | | | | | | | | | | | Introduce nr_busy_cpus in the struct sched_group_power [Not in sched_group because sched groups are duplicated for the SD_OVERLAP scheduler domain] and for each cpu that enters and exits idle, this parameter will be updated in each scheduler group of the scheduler domain that this cpu belongs to. To avoid the frequent update of this state as the cpu enters and exits idle, the update of the stat during idle exit is delayed to the first timer tick that happens after the cpu becomes busy. This is done using NOHZ_IDLE flag in the struct rq's nohz_flags. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20111202010832.555984323@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched, nohz: Introduce nohz_flags in 'struct rq'Suresh Siddha2011-12-063-24/+40
| | | | | | | | | | | | | | | | | | | | | | | Introduce nohz_flags in the struct rq, which will track these two flags for now. NOHZ_TICK_STOPPED keeps track of the tick stopped status that gets set when the tick is stopped. It will be used to update the nohz idle load balancer data structures during the first busy tick after the tick is restarted. At this first busy tick after tickless idle, NOHZ_TICK_STOPPED flag will be reset. This will minimize the nohz idle load balancer status updates that currently happen for every tickless exit, making it more scalable when there are many logical cpu's that enter and exit idle often. NOHZ_BALANCE_KICK will track the need for nohz idle load balance on this rq. This will replace the nohz_balance_kick in the rq, which was not being updated atomically. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20111202010832.499438999@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched/rt: Code cleanup, remove a redundant function callShan Hai2011-12-061-1/+1
| | | | | | | | | | | The second call to sched_rt_period() is redundant, because the value of the rt_runtime was already read and it was protected by the ->rt_runtime_lock. Signed-off-by: Shan Hai <haishan.bai@gmail.com> Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1322535836-13590-2-git-send-email-haishan.bai@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Fix the sched group node allocation for SD_OVERLAP domainsSuresh Siddha2011-12-061-1/+1
| | | | | | | | | | | | For the SD_OVERLAP domain, sched_groups for each CPU's sched_domain are privately allocated and not shared with any other cpu. So the sched group allocation should come from the cpu's node for which SD_OVERLAP sched domain is being setup. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111118230554.164910950@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Set skip_clock_update in yield_task_fair()Mike Galbraith2011-12-062-0/+13
| | | | | | | | | | | This is another case where we are on our way to schedule(), so can save a useless clock update and resulting microscopic vruntime update. Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321971686.6855.18.camel@marge.simson.net Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Use rt.nr_cpus_allowed to recover select_task_rq() cyclesMike Galbraith2011-12-062-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rt.nr_cpus_allowed is always available, use it to bail from select_task_rq() when only one cpu can be used, and saves some cycles for pinned tasks. See the line marked with '*' below: # taskset -c 3 pipe-test PerfTop: 997 irqs/sec kernel:89.5% exact: 0.0% [1000Hz cycles], (all, CPU: 3) ------------------------------------------------------------------------------------------------ Virgin Patched samples pcnt function samples pcnt function _______ _____ ___________________________ _______ _____ ___________________________ 2880.00 10.2% __schedule 3136.00 11.3% __schedule 1634.00 5.8% pipe_read 1615.00 5.8% pipe_read 1458.00 5.2% system_call 1534.00 5.5% system_call 1382.00 4.9% _raw_spin_lock_irqsave 1412.00 5.1% _raw_spin_lock_irqsave 1202.00 4.3% pipe_write 1255.00 4.5% copy_user_generic_string 1164.00 4.1% copy_user_generic_string 1241.00 4.5% __switch_to 1097.00 3.9% __switch_to 929.00 3.3% mutex_lock 872.00 3.1% mutex_lock 846.00 3.0% mutex_unlock 687.00 2.4% mutex_unlock 804.00 2.9% pipe_write 682.00 2.4% native_sched_clock 713.00 2.6% native_sched_clock 643.00 2.3% system_call_after_swapgs 653.00 2.3% _raw_spin_unlock_irqrestore 617.00 2.2% sched_clock_local 633.00 2.3% fsnotify 612.00 2.2% fsnotify 605.00 2.2% sched_clock_local 596.00 2.1% _raw_spin_unlock_irqrestore 593.00 2.1% system_call_after_swapgs 542.00 1.9% sysret_check 559.00 2.0% sysret_check 467.00 1.7% fget_light 472.00 1.7% fget_light 462.00 1.6% finish_task_switch 461.00 1.7% finish_task_switch 437.00 1.5% vfs_write 442.00 1.6% vfs_write 431.00 1.5% do_sync_write 428.00 1.5% do_sync_write * 413.00 1.5% select_task_rq_fair 404.00 1.5% _raw_spin_lock_irq 386.00 1.4% update_curr 402.00 1.4% update_curr 385.00 1.4% rw_verify_area 389.00 1.4% do_sync_read 377.00 1.3% _raw_spin_lock_irq 378.00 1.4% vfs_read 369.00 1.3% do_sync_read 340.00 1.2% pipe_iov_copy_from_user 360.00 1.3% vfs_read 316.00 1.1% __wake_up_sync_key 342.00 1.2% hrtick_start_fair 313.00 1.1% __wake_up_common Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321971504.6855.15.camel@marge.simson.net Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Clean up domain traversal in select_idle_sibling()Suresh Siddha2011-12-062-13/+27
| | | | | | | | | | | | | | | | | Instead of going through the scheduler domain hierarchy multiple times (for giving priority to an idle core over an idle SMT sibling in a busy core), start with the highest scheduler domain with the SD_SHARE_PKG_RESOURCES flag and traverse the domain hierarchy down till we find an idle group. This cleanup also addresses an issue reported by Mike where the recent changes returned the busy thread even in the presence of an idle SMT sibling in single socket platforms. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321556904.15339.25.camel@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* events, sched: Add tracepoint for accounting blocked timeAndrew Vagin2011-12-062-0/+9
| | | | | | | | | | | This tracepoint shows how long a task is sleeping in uninterruptible state. E.g. it may show how long and where a mutex is waited for. Signed-off-by: Andrew Vagin <avagin@openvz.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1322471015-107825-8-git-send-email-avagin@openvz.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Move all scheduler bits into kernel/sched/Peter Zijlstra2011-11-1717-28/+34
| | | | | | | | | | There's too many sched*.[ch] files in kernel/, give them their own directory. (No code changed, other than Makefile glue added.) Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Make separate sched*.c translation unitsPeter Zijlstra2011-11-1714-1954/+2034
| | | | | | | | | | | | Since once needs to do something at conferences and fixing compile warnings doesn't actually require much if any attention I decided to break up the sched.c #include "*.c" fest. This further modularizes the scheduler code. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-x0fcd3mnp8f9c99grcpewmhi@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Fix comment for requeue_rt_entityRichard Weinberger2011-11-161-2/+2
| | | | | | | Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321117677-3282-1-git-send-email-richard@nod.at Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Don't call task_group() too many times in set_task_rq()Andrew Vagin2011-11-161-4/+8
| | | | | | | | | | | | It improves perfomance, especially if autogroup is enabled. The size of set_task_rq() was 0x180 and now it is 0xa0. Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321020240-3874331-1-git-send-email-avagin@openvz.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched, trivial: Initialize root cgroup's sibling listGlauber Costa2011-11-161-0/+1
| | | | | | | | | | | | Even though there are no siblings, the list should be initialized to not contain bogus values. Signed-off-by: Glauber Costa <glommer@parallels.com> Acked-by: Paul Menage <paul@paulmenage.org> Acked-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1320182360-20043-2-git-send-email-glommer@parallels.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Use jump labels to reduce overhead when bandwidth control is inactivePaul Turner2011-11-162-5/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the linkage of jump-labels has been fixed they show a measurable improvement in overhead for the enabled-but-unused case. Workload is: 'taskset -c 0 perf stat --repeat 50 -e instructions,cycles,branches bash -c "for ((i=0;i<5;i++)); do $(dirname $0)/pipe-test 20000; done"' There's a speedup for all situations: instructions cycles branches ------------------------------------------------------------------------- Intel Westmere base 806611770 745895590 146765378 +jumplabel 803090165 (-0.44%) 713381840 (-4.36%) 144561130 AMD Barcelona base 824657415 740055589 148855354 +jumplabel 821056910 (-0.44%) 737558389 (-0.34%) 146635229 Signed-off-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111108042736.560831357@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Fix buglet in return_cfs_rq_runtime()Paul Turner2011-11-161-1/+1
| | | | | | | | | | In return_cfs_rq_runtime() we want to return bandwidth when there are no remaining tasks, not "return" when this is the case. Signed-off-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111108042736.623812423@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Avoid SMT siblings in select_idle_sibling() if possiblePeter Zijlstra2011-11-161-14/+28
| | | | | | | | | | | | | | Avoid select_idle_sibling() from picking a sibling thread if there's an idle core that shares cache. This fixes SMT balancing in the increasingly common case where there's a shared cache core available to balance to. Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Link: http://lkml.kernel.org/r/1321350377.1421.55.camel@twins Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Set the command name of the idle tasks in SMP kernelsCarsten Emde2011-11-142-1/+7
| | | | | | | | | | | | | | | | | | | | | In UP systems, the idle task is initialized using the init_task structure from which the command name is taken (currently "swapper"). In SMP systems, one idle task per CPU is forked by the worker thread from which the task structure is copied. The command name is, therefore, "kworker/0:0" or "kworker/0:1", if not updated. Since such update was lacking, all idle tasks in SMP systems were incorrectly named. This longtime bug was not discovered immediately, because there is no /proc/0 entry - the bug only becomes apparent when tracing is enabled. This patch sets the command name of the idle tasks in SMP systems to the name that is used in the INIT_TASK structure suffixed by a slash and the number of the CPU. Signed-off-by: Carsten Emde <C.Emde@osadl.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111026211708.768925506@osadl.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched, rt: Provide means of disabling cross-cpu bandwidth sharingPeter Zijlstra2011-11-142-0/+4
| | | | | | | | | | Normally the RT bandwidth scheme will share bandwidth across the entire root_domain. However sometimes its convenient to disable this sharing for debug purposes. Provide a simple feature switch to this end. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Document wait_for_completion_*() return valuesJ. Bruce Fields2011-11-141-0/+13
| | | | | | | | | | | The return-value convention for these functions varies depending on whether they're interruptible or can timeout. It can be a little confusing--document it. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111006192246.GB28026@fieldses.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched_fair: Fix a typo in the comment describing update_sd_lb_statsHui Kang2011-11-141-1/+1
| | | | | | | Signed-off-by: Hui Kang <hkang.sunysb@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1318388459-4427-1-git-send-email-hkang.sunysb@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: Add a comment to effective_load() since it's a painPeter Zijlstra2011-11-141-18/+95
| | | | | | | | | | | | | | | Every time I have to stare at this function I need to completely reverse engineer its workings, about time I write a comment explaining the thing. Collected bits and pieces from previous changelogs, mostly: 4be9daaa1b33701f011f4117f22dc1e45a3e6e34 83378269a5fad98f562ebc0f09c349575e6cbfe1 Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1318518057.27731.2.camel@twins Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'rmobile-fixes-for-linus' of git://github.com/pmundt/linux-shLinus Torvalds2011-11-1413-523/+400
|\ | | | | | | | | | | | | | | | | | | | | | | * 'rmobile-fixes-for-linus' of git://github.com/pmundt/linux-sh: ARM: mach-shmobile: cpuidle single/global and last_state fixes ARM: mach-shmobile: move helper macro PORTCR to sh_pfc.h ARM: mach-shmobile: move helper macro PORT_xx to sh_pfc.h ARM: mach-shmobile: move helper macro PORT_DATA_xx to sh_pfc.h ARM: mach-shmobile: ap4evb: remove white space from end of line ARM: mach-shmobile: clock-sh7372: remove un-necessary index ARM: mach-shmobile: kota2: add comment out separator ARM: mach-shmobile: sh73a0: add MMC data pin pull-up
| * ARM: mach-shmobile: cpuidle single/global and last_state fixesMagnus Damm2011-11-113-40/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following commits break cpuidle on SH-Mobile ARM: 46bcfad cpuidle: Single/Global registration of idle states e978aa7 cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state This patch remedies these issues by up-porting the SH-Mobile code to fit with the above introduced framework changes. It is worth noting that the new code becomes significantly cleaner, so these framework changes are very welcome. At the same time this breakage could probably have been avoided by grepping for "last_state" and "cpuidle_register_driver". Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: move helper macro PORTCR to sh_pfc.hKuninori Morimoto2011-11-115-61/+17
| | | | | | | | | | Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: move helper macro PORT_xx to sh_pfc.hKuninori Morimoto2011-11-115-197/+140
| | | | | | | | | | | | | | | | This patch moves PORT_xx helper macro to sh_pfc.h, and it expects CPU_ALL_PORT() macro for each CPU Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: move helper macro PORT_DATA_xx to sh_pfc.hKuninori Morimoto2011-11-115-212/+151
| | | | | | | | | | | | | | | | This patch move PORT_DATA_xx helper macro to sh_pfc.h. and pfc-sh7372.c used it Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: ap4evb: remove white space from end of lineKuninori Morimoto2011-11-111-1/+1
| | | | | | | | | | Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: clock-sh7372: remove un-necessary indexKuninori Morimoto2011-11-111-4/+4
| | | | | | | | | | | | | | it is not necessary to have sh7372_xxxx index on static variable Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: kota2: add comment out separatorKuninori Morimoto2011-11-111-0/+7
| | | | | | | | | | Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * ARM: mach-shmobile: sh73a0: add MMC data pin pull-upKuninori Morimoto2011-11-113-8/+50
| | | | | | | | | | | | | | | | | | | | | | This patch adds MMC data pin pull-up option for pfc-sh73a0.c, and select it on ag5evm board. The MMC read/write will be error without this patch. Cc: Takashi YOSHII <takashi.yoshii.zj@renesas.com> Tested-by: Simon Horman <horms@verge.net.au> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | Merge branch 'sh-fixes-for-linus' of git://github.com/pmundt/linux-shLinus Torvalds2011-11-1414-98/+82
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'sh-fixes-for-linus' of git://github.com/pmundt/linux-sh: mailmap: Fix up some renesas attributions sh: clkfwk: Kill off remaining debugfs cruft. drivers: sh: Kill off dead pathname for runtime PM stub. drivers: sh: Generalize runtime PM platform stub. sh: Wire up process_vm syscalls. sh: clkfwk: add clk_rate_mult_range_round() serial: sh-sci: Fix up SH-2A SCIF support. sh: Fix cached/uncaced address calculation in 29bit mode
| * | mailmap: Fix up some renesas attributionsKuninori Morimoto2011-11-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | This adds in entries for both Goda and Morimoto-san who have previously used different conventions. Cc: Yusuke Goda <yusuke.goda.sx@renesas.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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| *-. \ Merge branches 'sh/pm-runtime' and 'common/clkfwk' into sh-fixes-for-linusPaul Mundt2011-11-113472-35672/+65364
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| | | * | sh: clkfwk: Kill off remaining debugfs cruft.Paul Mundt2011-11-112-88/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all of the named string association with clocks has been migrated to clkdev lookups there's no meaningful named topology that can be constructed for a debugfs tree view. Get rid of the left over bits, and shrink struct clk a bit in the process. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | | * | sh: clkfwk: add clk_rate_mult_range_round()Kuninori Morimoto2011-11-052-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This provides a clk_rate_mult_range_round() helper for use by some of the CPG PLL ranged multipliers, following the same approach as used by the div ranges. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | drivers: sh: Kill off dead pathname for runtime PM stub.Paul Mundt2011-11-111-3/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | drivers: sh: Generalize runtime PM platform stub.Paul Mundt2011-11-113-1/+9
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The runtime PM platform support stub in use by ARM-based SH/R-Mobile platforms contains nothing that's specifically ARM-related and instead of wholly generic to anything using the clock framework. The recent runtime PM changes interact rather badly with the lazy disabling of clocks late in the boot process through the clock framework, leading to situations where the runtime suspend/resume paths are entered without a clock being actively driven due to having been lazily gated off. In order to correct this we can trivially tie in the aforementioned stub as a general fallback for all SH platforms that don't presently have their own runtime PM implementations (the corner case being SH-based SH-Mobile platforms, which have their own stub through the hwblk API -- which in turn has bitrotted and will be subsequently adapted to use the same stub as everyone else), regardless of whether the platforms choose to define power domains of their own or not. This fixes up regressions for clock framework users who also build in runtime PM support without any specific power domains of their own, which was previously causing the serial console to be lost when warring with lazy clock disabling. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | sh: Wire up process_vm syscalls.Paul Mundt2011-11-114-2/+10
| | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * | | Merge branches 'sh/core' and 'sh/serial-rework' into sh-fixes-for-linusPaul Mundt2011-11-043-4/+32
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| | * | | serial: sh-sci: Fix up SH-2A SCIF support.Phil Edworthy2011-11-043-4/+32
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes up support for SH-2(A) SCIFs by introducing a new regtype. As expected, it's close to the SH-4A SCIF with fifodata, but still different enough to warrant its own type. Fixes up a number of FIFO overflows and similar for both SH7203/SH7264. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Tested-by: Federico Fuga <fuga@studiofuga.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * / | sh: Fix cached/uncaced address calculation in 29bit modeNobuhiro Iwamatsu2011-11-041-0/+5
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the case of 29bit mode, CAC/UNCAC_ADDR does not return a right address. This revises this problem by using P1SEGADDR and P2SEGADDR in 29bit mode. Reported-by: Yutaro Ebihara <ebiharaml@si-linux.co.jp> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Tested-by: Simon Horman <horms@verge.net.au> Cc: stable@kernel.org Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | | Merge git://github.com/rustyrussell/linuxLinus Torvalds2011-11-141-5/+6
|\ \ \ | | | | | | | | | | | | | | | | * git://github.com/rustyrussell/linux: virtio-pci: fix use after free
| * | | virtio-pci: fix use after freeMichael S. Tsirkin2011-11-141-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 31a3ddda166cda86d2b5111e09ba4bda5239fae6 introduced a use after free in virtio-pci. The main issue is that the release method signals removal of the virtio device, while remove signals removal of the pci device. For example, on driver removal or hot-unplug, virtio_pci_release_dev is called before virtio_pci_remove. We then might get a crash as virtio_pci_remove tries to use the device freed by virtio_pci_release_dev. We allocate/free all resources together with the pci device, so we can leave the release method empty. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: stable@kernel.org
* | | | Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds2011-11-131-8/+19
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm/radeon/kms/combios: fix dynamic allocation of PM clock modes
| * | | | drm/radeon/kms/combios: fix dynamic allocation of PM clock modesAlex Deucher2011-11-121-8/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I missed the combios path when I updated the atombios pm code. Reported by amarsh04 on IRC. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | | | | ACPI / cpuidle: Remove acpi_idle_suspend (to fix suspend regression)Rafael J. Wysocki2011-11-121-29/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After commit e978aa7d7d57 ("cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state") setting acpi_idle_suspend to 1 by acpi_processor_suspend() causes the ACPI cpuidle routines to return error codes continuously, which in turn causes cpuidle to lock up (hard). However, acpi_idle_suspend doesn't appear to be useful for any particular purpose (it's racy and doesn't really provide any real protection), so it can be removed, which makes the problem go away. Reported-and-tested-by: Tomas M. <tmezzadra@gmail.com> Reported-and-tested-by: Ferenc Wagner <wferi@niif.hu> Tested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | Merge branch 'fixes' of ↵Linus Torvalds2011-11-1232-80/+117
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: arm/imx: fix imx6q mmc error when mounting rootfs arm/imx: fix AUTO_ZRELADDR selection arm/imx: fix the references to ARCH_MX3 ARM: mx51/53: set pwm clock parent to ipg_perclk arm/tegra: enable headphone detection gpio on seaboard arm/dt: Fix ventana SDHCI power-gpios arm/tegra: Don't create duplicate gpio and pinmux devices ARM: at91: Fix USBA gadget registration atmel/spi: fix missing probe at91/yl-9200: Fix section mismatch at91: vmalloc fix missing AT91_VIRT_BASE define ARM: at91: usart: drop static map regs for dbgu ARM: picoxcell: add extra temp register to addruart ARM: msm: fix compilation flags for MSM_SCM arm/mxs: fix mmc device adding for mach-mx28evk ARM: mxc: Remove test_for_ltirq ARM:i.MX: fix build error in clock-mx51-mx53.c ARM:i.MX: fix build error in tzic/avic.c ARM: mxc: fix local timer interrupt handling msm: boards: Fix fallout from removal of machine_desc in fixup
| * \ \ \ \ Merge branch 'picoxcell-fixes' of git://github.com/jamieiles/linux-2.6-ji ↵Olof Johansson2011-11-111-1/+1
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | into fixes
| | * | | | | ARM: picoxcell: add extra temp register to addruartJamie Iles2011-11-091-1/+1
| | | |/ / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 639da5ee3 (ARM: add an extra temp register to the low level debugging addruart macro) didn't include picoxcell as it hadn't been merged at the time. Fix up the compile breakage by adding the extra temp parameter. Signed-off-by: Jamie Iles <jamie@jamieiles.com>
| * | | | | Merge branch 'imx-fixes-for-arnd' of ↵Olof Johansson2011-11-115-20/+47
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | git://git.pengutronix.de/git/imx/linux-2.6 into fixes
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