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| author | Ingo Molnar <mingo@elte.hu> | 2012-03-12 20:46:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-03-12 20:47:05 +0100 |
| commit | bea95c152dee1791dd02cbc708afbb115bb00f9a (patch) | |
| tree | af9994c42c5fdd81ba3dadd7b812e2fa85273353 /arch/arm | |
| parent | f9b4eeb809c6d031cc9561cc34dd691701cb2c2a (diff) | |
| parent | 24bff2dc0f77b1f186b7bdf30060caf3df191a68 (diff) | |
Merge branch 'perf/hw-branch-sampling' into perf/core
Merge reason: The 'perf record -b' hardware branch sampling feature is ready for upstream.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index b2abfa18f13..8a89d3b7626 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -539,6 +539,10 @@ static int armpmu_event_init(struct perf_event *event) int err = 0; atomic_t *active_events = &armpmu->active_events; + /* does not support taken branch sampling */ + if (has_branch_stack(event)) + return -EOPNOTSUPP; + if (armpmu->map_event(event) == -ENOENT) return -ENOENT; |