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-rw-r--r--kernel/perf_event.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 02d4ff041b01..5087125e2a00 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4293,6 +4293,7 @@ perf_event_alloc(struct perf_event_attr *attr,
struct perf_event_context *ctx,
struct perf_event *group_leader,
struct perf_event *parent_event,
+ perf_callback_t callback,
gfp_t gfpflags)
{
const struct pmu *pmu;
@@ -4335,6 +4336,11 @@ perf_event_alloc(struct perf_event_attr *attr,
event->state = PERF_EVENT_STATE_INACTIVE;
+ if (!callback && parent_event)
+ callback = parent_event->callback;
+
+ event->callback = callback;
+
if (attr->disabled)
event->state = PERF_EVENT_STATE_OFF;
@@ -4611,7 +4617,7 @@ SYSCALL_DEFINE5(perf_event_open,
}
event = perf_event_alloc(&attr, cpu, ctx, group_leader,
- NULL, GFP_KERNEL);
+ NULL, NULL, GFP_KERNEL);
err = PTR_ERR(event);
if (IS_ERR(event))
goto err_put_context;
@@ -4668,7 +4674,7 @@ err_put_context:
*/
struct perf_event *
perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
- pid_t pid)
+ pid_t pid, perf_callback_t callback)
{
struct perf_event *event;
struct perf_event_context *ctx;
@@ -4683,7 +4689,7 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
return NULL ;
event = perf_event_alloc(attr, cpu, ctx, NULL,
- NULL, GFP_KERNEL);
+ NULL, callback, GFP_KERNEL);
err = PTR_ERR(event);
if (IS_ERR(event))
goto err_put_context;
@@ -4736,7 +4742,7 @@ inherit_event(struct perf_event *parent_event,
child_event = perf_event_alloc(&parent_event->attr,
parent_event->cpu, child_ctx,
group_leader, parent_event,
- GFP_KERNEL);
+ NULL, GFP_KERNEL);
if (IS_ERR(child_event))
return child_event;
get_ctx(child_ctx);