Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 22:51:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers

Browse Source 
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@linux.intel.com>
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lkml.kernel.org/r/20221125040604.5051-2-weijiang.yang@intel.com
This commit is contained in:
Like Xu 2022-11-24 23:05:50 -05:00 committed by Peter Zijlstra
parent 1b929c02af
commit 03c4c7f887
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/events/intel/lbr.c
View File

@ -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);