Commit-ID: 0e9f2204cfa6d79abe3e525ddf7c4ab5792cc751 Gitweb: http://git.kernel.org/tip/0e9f2204cfa6d79abe3e525ddf7c4ab5792cc751 Author: Peter Zijlstra <[email protected]> AuthorDate: Wed, 5 Feb 2014 11:19:56 +0100 Committer: Ingo Molnar <[email protected]> CommitDate: Sun, 9 Feb 2014 13:08:25 +0100
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 <[email protected]> Suggested-by: Mark Davies <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/cpu/perf_event.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 1246b85..895604f 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
