perf/x86: Fix Userspace RDPMC switch
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>
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@ -1826,7 +1826,7 @@ static ssize_t set_attr_rdpmc(struct device *cdev,
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if (!!val != !!x86_pmu.attr_rdpmc) {
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x86_pmu.attr_rdpmc = !!val;
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smp_call_function(change_rdpmc, (void *)val, 1);
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on_each_cpu(change_rdpmc, (void *)val, 1);
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}
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return count;
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