Messages in this thread Patch in this message | | | From | Yang Weijiang <> | Subject | [PATCH v2 01/15] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers | Date | Thu, 24 Nov 2022 23:05:50 -0500 |
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From: Like Xu <like.xu@linux.intel.com>
The x86_pmu.lbr_info is 0 unless explicitly initialized, so there's no point checking x86_pmu.intel_cap.lbr_format.
Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Like Xu <like.xu@linux.intel.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> --- arch/x86/events/intel/lbr.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c index 4dbde69c423b..e7caabfa1377 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1606,12 +1606,10 @@ void __init intel_pmu_arch_lbr_init(void) */ void x86_perf_get_lbr(struct x86_pmu_lbr *lbr) { - int lbr_fmt = x86_pmu.intel_cap.lbr_format; - lbr->nr = x86_pmu.lbr_nr; lbr->from = x86_pmu.lbr_from; lbr->to = x86_pmu.lbr_to; - lbr->info = (lbr_fmt == LBR_FORMAT_INFO) ? x86_pmu.lbr_info : 0; + lbr->info = x86_pmu.lbr_info; } EXPORT_SYMBOL_GPL(x86_perf_get_lbr); -- 2.27.0
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