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perf/x86: Fix Userspace RDPMC switch

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The current code forgets to change the CR4 state on the current CPU.
Use on_each_cpu() instead of smp_call_function().

Reported-by: Mark Davies <junk@eslaf.co.uk>
Suggested-by: Mark Davies <junk@eslaf.co.uk>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: fweisbec@gmail.com
Link: http://lkml.kernel.org/n/tip-69efsat90ibhnd577zy3z9gh@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2014-02-05 11:19:56 +01:00 committed by Ingo Molnar
parent e97df76377
commit 0e9f2204cf
1 changed files with 1 additions and 1 deletions
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arch/x86/kernel/cpu/perf_event.c
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@ -1826,7 +1826,7 @@ static ssize_t set_attr_rdpmc(struct device *cdev,
if (!!val != !!x86_pmu.attr_rdpmc) {
x86_pmu.attr_rdpmc = !!val;
smp_call_function(change_rdpmc, (void *)val, 1);
on_each_cpu(change_rdpmc, (void *)val, 1);
}
return count;