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Subject[PATCH v4 01/10] perf/x86: fix the variable type of the LBR MSRs
Date
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(-)

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 */
--
2.7.4
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