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Suggested-by: Namhyung Kim Signed-off-by: Yabin Cui --- arch/x86/events/amd/core.c | 3 +-- arch/x86/events/core.c | 3 +-- arch/x86/events/intel/ds.c | 3 +-- include/linux/perf_event.h | 15 ++++++++++----- 4 files changed, 13 insertions(+), 11 deletions(-) diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c index 1fc4ce44e743..f71a9ef932c5 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -998,8 +998,7 @@ static int amd_pmu_v2_handle_irq(struct pt_regs *regs) if (!x86_perf_event_set_period(event)) continue; =20 - if (has_branch_stack(event)) - perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL); + perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL); =20 if (perf_event_overflow(event, &data, regs)) x86_pmu_stop(event, 0); diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 5b0dd07b1ef1..ff5577315938 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1702,8 +1702,7 @@ int x86_pmu_handle_irq(struct pt_regs *regs) =20 perf_sample_data_init(&data, 0, event->hw.last_period); =20 - if (has_branch_stack(event)) - perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL); + perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL); =20 if (perf_event_overflow(event, &data, regs)) x86_pmu_stop(event, 0); diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index c2b5585aa6d1..f25236ffa28f 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -1754,8 +1754,7 @@ static void setup_pebs_fixed_sample_data(struct perf_= event *event, if (x86_pmu.intel_cap.pebs_format >=3D 3) setup_pebs_time(event, data, pebs->tsc); =20 - if (has_branch_stack(event)) - perf_sample_save_brstack(data, event, &cpuc->lbr_stack, NULL); + perf_sample_save_brstack(data, event, &cpuc->lbr_stack, NULL); } =20 static void adaptive_pebs_save_regs(struct pt_regs *regs, diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index bda066c33120..f6637f3cbe84 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1276,6 +1276,11 @@ static inline void perf_sample_save_raw_data(struct = perf_sample_data *data, data->sample_flags |=3D PERF_SAMPLE_RAW; } =20 +static inline bool has_branch_stack(struct perf_event *event) +{ + return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; +} + static inline void perf_sample_save_brstack(struct perf_sample_data *data, struct perf_event *event, struct perf_branch_stack *brs, @@ -1283,6 +1288,11 @@ static inline void perf_sample_save_brstack(struct p= erf_sample_data *data, { int size =3D sizeof(u64); /* nr */ =20 + if (!has_branch_stack(event)) + return; + if (WARN_ON_ONCE(data->sample_flags & PERF_SAMPLE_BRANCH_STACK)) + return; + if (branch_sample_hw_index(event)) size +=3D sizeof(u64); size +=3D brs->nr * sizeof(struct perf_branch_entry); @@ -1658,11 +1668,6 @@ extern void perf_bp_event(struct perf_event *event, = void *data); # define perf_arch_bpf_user_pt_regs(regs) regs #endif =20 -static inline bool has_branch_stack(struct perf_event *event) -{ - return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; -} - static inline bool needs_branch_stack(struct perf_event *event) { return event->attr.branch_sample_type !=3D 0; --=20 2.45.0.rc1.225.g2a3ae87e7f-goog