| Message ID | 1550135174-5423-2-git-send-email-wei.w.wang@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Guest LBR Enabling | expand |
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 78d7b70..1f78d85 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -619,8 +619,8 @@ 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 stack 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 */
The MSR variable type can be "unsigned int", which uses less memory than the longer unsigned long. The lbr nr won't be a negative number, so make it "unsigned int" as well. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> --- arch/x86/events/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)