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| author | Ingo Molnar <mingo@kernel.org> | 2017-08-17 11:50:48 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-17 11:50:48 +0300 |
| commit | 2257e268b1154966c5b0141b23695db1043ff39d (patch) | |
| tree | dae4b032afb9872568cf7921b39d30c79a6c3fee /arch/x86/events/intel/lbr.c | |
| parent | 27aac20574110abfd594175a668dc58b23b2b14a (diff) | |
| parent | ac9a40905a610fb02086a37b11ff4bf046825a88 (diff) | |
| download | linux-2257e268b1154966c5b0141b23695db1043ff39d.tar.xz | |
Merge branch 'linus' into x86/boot, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events/intel/lbr.c')
| -rw-r--r-- | arch/x86/events/intel/lbr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c index eb261656a320..955457a30197 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -380,8 +380,12 @@ static void __intel_pmu_lbr_save(struct x86_perf_task_context *task_ctx) void intel_pmu_lbr_sched_task(struct perf_event_context *ctx, bool sched_in) { + struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); struct x86_perf_task_context *task_ctx; + if (!cpuc->lbr_users) + return; + /* * If LBR callstack feature is enabled and the stack was saved when * the task was scheduled out, restore the stack. Otherwise flush |