[PATCH] perf/x86/amd: Explicitly define PERF_COUNT_HW_REF_CPU_CYCLES as undefined.

Adam Borowski
2016-04-27T01:21:10Z

filter_events() relies on the value of 0 to remove events that are not
applicable, like this one.

UBSAN: Undefined behaviour in arch/x86/events/amd/core.c:132:30
index 9 is out of range for type 'u64 [9]'
UBSAN: Undefined behaviour in arch/x86/events/amd/core.c:132:9
load of address ffffffff81c021c8 with insufficient space
for an object of type 'const u64'

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
---
arch/x86/events/amd/core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 86a9bec..5fa1b8e 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -125,6 +125,7 @@ static const u64 amd_perfmon_event_map[] =
[PERF_COUNT_HW_BRANCH_MISSES] = 0x00c3,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x00d0, /* "Decoder empty" event */
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 0x00d1, /* "Dispatch stalls" event */
+ [PERF_COUNT_HW_REF_CPU_CYCLES] = 0,
};

static u64 amd_pmu_event_map(int hw_event)
--
2.8.1