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| author |   Peter Zijlstra <peterz@infradead.org> | 2014-02-05 11:19:56 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2014-02-09 13:08:25 +0100 |
| commit | 0e9f2204cfa6d79abe3e525ddf7c4ab5792cc751 (patch) | |
| tree | 5024f0c05df026a22ad5f4dbd98402bc4d7e995e | |
| parent | perf/x86/intel/p6: Add userspace RDPMC quirk for PPro (diff) | |
| download | linux-dev-0e9f2204cfa6d79abe3e525ddf7c4ab5792cc751.tar.xz linux-dev-0e9f2204cfa6d79abe3e525ddf7c4ab5792cc751.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 1246b853c4e0..895604f2e916 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -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; |