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Date: Tue, 27 Dec 2022 11:58:54 -0000 From: "tip-bot2 for Like Xu" <tip-bot2@...utronix.de> To: linux-tip-commits@...r.kernel.org Cc: Like Xu <like.xu@...ux.intel.com>, Yang Weijiang <weijiang.yang@...el.com>, "Peter Zijlstra (Intel)" <peterz@...radead.org>, Kan Liang <kan.liang@...ux.intel.com>, Andi Kleen <ak@...ux.intel.com>, x86@...nel.org, linux-kernel@...r.kernel.org Subject: [tip: perf/core] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers The following commit has been merged into the perf/core branch of tip: Commit-ID: 03c4c7f88709fac0e20b6a48357c73d6fc50e544 Gitweb: https://git.kernel.org/tip/03c4c7f88709fac0e20b6a48357c73d6fc50e544 Author: Like Xu <like.xu@...ux.intel.com> AuthorDate: Thu, 24 Nov 2022 23:05:50 -05:00 Committer: Peter Zijlstra <peterz@...radead.org> CommitterDate: Tue, 27 Dec 2022 12:52:07 +01:00 perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers The x86_pmu.lbr_info is 0 unless explicitly initialized, so there's no point checking x86_pmu.intel_cap.lbr_format. Signed-off-by: Like Xu <like.xu@...ux.intel.com> Signed-off-by: Yang Weijiang <weijiang.yang@...el.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org> Reviewed-by: Kan Liang <kan.liang@...ux.intel.com> Reviewed-by: Andi Kleen <ak@...ux.intel.com> Link: https://lkml.kernel.org/r/20221125040604.5051-2-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 1f21f57..c3b0d15 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1606,12 +1606,10 @@ clear_arch_lbr: */ 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);
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