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authorIngo Molnar <mingo@elte.hu>2012-03-12 20:46:35 +0100
committerIngo Molnar <mingo@elte.hu>2012-03-12 20:47:05 +0100
commitbea95c152dee1791dd02cbc708afbb115bb00f9a (patch)
treeaf9994c42c5fdd81ba3dadd7b812e2fa85273353 /arch/alpha
parentf9b4eeb809c6d031cc9561cc34dd691701cb2c2a (diff)
parent24bff2dc0f77b1f186b7bdf30060caf3df191a68 (diff)
downloadop-kernel-dev-bea95c152dee1791dd02cbc708afbb115bb00f9a.zip
op-kernel-dev-bea95c152dee1791dd02cbc708afbb115bb00f9a.tar.gz
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/alpha')
-rw-r--r--arch/alpha/kernel/perf_event.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index 8143cd7..0dae252 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -685,6 +685,10 @@ static int alpha_pmu_event_init(struct perf_event *event)
{
int err;
+ /* does not support taken branch sampling */
+ if (has_branch_stack(event))
+ return -EOPNOTSUPP;
+
switch (event->attr.type) {
case PERF_TYPE_RAW:
case PERF_TYPE_HARDWARE:
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