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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-10-18 10:36:11 +1100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-10-18 10:36:11 +1100
commit72523d8082df3d89bffe30cbc1356dbb45ab51ae (patch)
tree54e18a4ca7d7a279a260902a93f190078225097f /arch/powerpc/perf
parent18673533256a2953ccefded52df2679de8640685 (diff)
downloadlinaro-lsk-72523d8082df3d89bffe30cbc1356dbb45ab51ae.tar.gz
Revert "powerpc/perf: Use pmc_overflow() to detect rolled back events"
This reverts commit 813312110bede27bffd082c25cd31730bd567beb. This revert was requested by the author of the patch as it seems to cause system hangs with some low frequency events
Diffstat (limited to 'arch/powerpc/perf')
-rw-r--r--arch/powerpc/perf/core-book3s.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 0db88f501f9..aa2465e21f1 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1463,7 +1463,7 @@ static void perf_event_interrupt(struct pt_regs *regs)
if (!event->hw.idx || is_limited_pmc(event->hw.idx))
continue;
val = read_pmc(event->hw.idx);
- if (pmc_overflow(val)) {
+ if ((int)val < 0) {
/* event has overflowed */
found = 1;
record_and_restart(event, val, regs);