Messages in this thread Patch in this message | | | From | Like Xu <> | Subject | [PATCH v10 01/11] perf/x86: Fix variable type for LBR registers | Date | Thu, 23 Apr 2020 16:14:02 +0800 |
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From: Wei Wang <wei.w.wang@intel.com>
The msr variable type can be 'unsigned int', which uses less memory than the longer 'unsigned long'. Fix 'struct x86_pmu' for that. The lbr_nr won't be a negative number, so make it 'unsigned int' as well.
Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Wei Wang <wei.w.wang@intel.com> --- arch/x86/events/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index f1cd1ca1a77b..1025bc6eb04f 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -672,8 +672,8 @@ struct x86_pmu { /* * Intel LBR */ - unsigned long lbr_tos, lbr_from, lbr_to; /* MSR base regs */ - int lbr_nr; /* hardware stack size */ + unsigned int lbr_tos, lbr_from, lbr_to, + lbr_nr; /* LBR base regs and size */ u64 lbr_sel_mask; /* LBR_SELECT valid bits */ const int *lbr_sel_map; /* lbr_select mappings */ bool lbr_double_abort; /* duplicated lbr aborts */ -- 2.21.1
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