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authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>2012-10-16 13:28:10 +0530
committerIngo Molnar <mingo@kernel.org>2012-10-24 10:01:58 +0200
commit6760bca9fd16256210f4922a3e9f067d2c7017d7 (patch)
tree66ba5e50ff9c516b929373aaae6ebae430b6bd77 /include
parentbffd5fc26043cce33158d4e027576e79fab2f7bb (diff)
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perf, cpu hotplug: Run CPU_STARTING notifiers with irqs disabled
The CPU_STARTING notifiers are supposed to be run with irqs disabled. But the perf_cpu_notifier() macro invokes them without doing that. Fix it. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: peterz@infradead.org Cc: acme@ghostprotocols.net Link: http://lkml.kernel.org/r/20121016075809.3572.47848.stgit@srivatsabhat.in.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/perf_event.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 2e902359aee5..06478056da03 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -803,10 +803,13 @@ static inline void perf_event_task_tick(void) { }
do { \
static struct notifier_block fn##_nb __cpuinitdata = \
{ .notifier_call = fn, .priority = CPU_PRI_PERF }; \
+ unsigned long flags; \
fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
(void *)(unsigned long)smp_processor_id()); \
+ local_irq_save(flags); \
fn(&fn##_nb, (unsigned long)CPU_STARTING, \
(void *)(unsigned long)smp_processor_id()); \
+ local_irq_restore(flags); \
fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
(void *)(unsigned long)smp_processor_id()); \
register_cpu_notifier(&fn##_nb); \