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| author | Arnd Bergmann <arnd@arndb.de> | 2012-02-27 21:59:05 +0400 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-02-27 21:59:11 +0400 |
| commit | a0008bf73c12212769b0d0b19cdec5c432de94ba (patch) | |
| tree | e53c67efd4aad97ab9f2addc1fc0d62879b41c55 /arch/powerpc/kernel/perf_event.c | |
| parent | 5a8c271b26b83a09924c99aaa5c607021aed142b (diff) | |
| parent | cfac337b0fbcad5181096ab72bb24a05bd444562 (diff) | |
| download | linux-a0008bf73c12212769b0d0b19cdec5c432de94ba.tar.xz | |
Merge branch 'lpc32xx/fixes-non-critical' of git://git.antcom.de/linux-2.6 into next/fixes-non-critical
* 'lpc32xx/fixes-non-critical' of git://git.antcom.de/linux-2.6: (1 commit)
ARM: LPC32xx: Fix missing and bad LPC32XX macros
Update to Linux 3.3-rc5
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/powerpc/kernel/perf_event.c')
| -rw-r--r-- | arch/powerpc/kernel/perf_event.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c index 10a140f82cb8..64483fde95c6 100644 --- a/arch/powerpc/kernel/perf_event.c +++ b/arch/powerpc/kernel/perf_event.c @@ -865,6 +865,7 @@ static void power_pmu_start(struct perf_event *event, int ef_flags) { unsigned long flags; s64 left; + unsigned long val; if (!event->hw.idx || !event->hw.sample_period) return; @@ -880,7 +881,12 @@ static void power_pmu_start(struct perf_event *event, int ef_flags) event->hw.state = 0; left = local64_read(&event->hw.period_left); - write_pmc(event->hw.idx, left); + + val = 0; + if (left < 0x80000000L) + val = 0x80000000L - left; + + write_pmc(event->hw.idx, val); perf_event_update_userpage(event); perf_pmu_enable(event->pmu); |