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perf: Fix up delayed_put_task_struct()

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I missed a perf_event_ctxp user when converting it to an array. Pull this
last user into perf_event.c as well and fix it up.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-09-09 21:01:59 +02:00 committed by Ingo Molnar
parent 1b9a644fec
commit 4e231c7962
3 changed files with 11 additions and 3 deletions
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2
include/linux/perf_event.h
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@ -889,6 +889,7 @@ extern void perf_event_task_sched_out(struct task_struct *task, struct task_stru
extern int perf_event_init_task(struct task_struct *child);
extern void perf_event_exit_task(struct task_struct *child);
extern void perf_event_free_task(struct task_struct *task);
extern void perf_event_delayed_put(struct task_struct *task);
extern void set_perf_event_pending(void);
extern void perf_event_do_pending(void);
extern void perf_event_print_debug(void);
@ -1067,6 +1068,7 @@ perf_event_task_sched_out(struct task_struct *task,
static inline int perf_event_init_task(struct task_struct *child) { return 0; }
static inline void perf_event_exit_task(struct task_struct *child) { }
static inline void perf_event_free_task(struct task_struct *task) { }
static inline void perf_event_delayed_put(struct task_struct *task) { }
static inline void perf_event_do_pending(void) { }
static inline void perf_event_print_debug(void) { }
static inline int perf_event_task_disable(void) { return -EINVAL; }

4
kernel/exit.c
View file

@ -149,9 +149,7 @@ static void delayed_put_task_struct(struct rcu_head *rhp)
{
struct task_struct *tsk = container_of(rhp, struct task_struct, rcu);
#ifdef CONFIG_PERF_EVENTS
WARN_ON_ONCE(tsk->perf_event_ctxp);
#endif
perf_event_delayed_put(tsk);
trace_sched_process_free(tsk);
put_task_struct(tsk);
}

8
kernel/perf_event.c
View file

@ -5893,6 +5893,14 @@ void perf_event_free_task(struct task_struct *task)
}
}
void perf_event_delayed_put(struct task_struct *task)
{
int ctxn;
for_each_task_context_nr(ctxn)
WARN_ON_ONCE(task->perf_event_ctxp[ctxn]);
}
/*
* inherit a event from parent task to child task:
*/