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Peter Zijlstra e8d8a90fc5 perf/x86/BTS: Fix RCU usage 
This splat reminds us:

[ 8166.045595] [ INFO: suspicious RCU usage. ]

[ 8166.168972]  [<ffffffff81127837>] lockdep_rcu_suspicious+0xe7/0x120
[ 8166.175966]  [<ffffffff811e0bae>] perf_callchain+0x23e/0x250
[ 8166.182280]  [<ffffffff811dda3d>] perf_prepare_sample+0x27d/0x350
[ 8166.189082]  [<ffffffff8100f503>] intel_pmu_drain_bts_buffer+0x133/0x200

... that as the core code does, one should hold rcu_read_lock() over that
entire BTS event-output generation sequence as well.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-21 09:08:17 +01:00
..
alpha arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
arc arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
arm Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
arm64 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
avr32 arch: Set IORESOURCE_SYSTEM_RAM flag for System RAM 2016-01-30 09:49:57 +01:00
blackfin arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
c6x locking/lockdep: Eliminate lockdep_init() 2016-02-09 12:03:25 +01:00
cris Merge branch 'akpm' (patches from Andrew) 2016-01-21 12:32:08 -08:00
frv dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
h8300 Merge branch 'akpm' (patches from Andrew) 2016-01-21 12:32:08 -08:00
hexagon arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
ia64 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
m32r Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
m68k m68k/defconfig: Update defconfigs for v4.5-rc1 2016-02-01 10:35:38 +01:00
metag arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
microblaze locking/lockdep: Eliminate lockdep_init() 2016-02-09 12:03:25 +01:00
mips Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
mn10300 arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
nios2 dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
openrisc dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
parisc Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
powerpc Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
s390 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
score arch: Set IORESOURCE_SYSTEM_RAM flag for System RAM 2016-01-30 09:49:57 +01:00
sh Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
sparc Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
tile Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 13:50:29 -07:00
um um: Export pm_power_off 2016-03-05 22:17:52 +01:00
unicore32 arch: Set IORESOURCE_SYSTEM_RAM flag for System RAM 2016-01-30 09:49:57 +01:00
x86 perf/x86/BTS: Fix RCU usage 2016-03-21 09:08:17 +01:00
xtensa arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
.gitignore
Kconfig dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00