forked from luck/tmp_suning_uos_patched
perf: Simplify perf_event_exit_task_context()
Instead of jumping through hoops to make sure to find (and exit) each event, do it the simple straight fwd way. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-tij931199thfkys8vbnokdpf@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
parent
683ede43dd
commit
3a497f4863
|
@ -7485,24 +7485,9 @@ static void perf_event_exit_task_context(struct task_struct *child, int ctxn)
|
||||||
*/
|
*/
|
||||||
mutex_lock(&child_ctx->mutex);
|
mutex_lock(&child_ctx->mutex);
|
||||||
|
|
||||||
again:
|
list_for_each_entry_rcu(child_event, &child_ctx->event_list, event_entry)
|
||||||
list_for_each_entry_safe(child_event, tmp, &child_ctx->pinned_groups,
|
|
||||||
group_entry)
|
|
||||||
__perf_event_exit_task(child_event, child_ctx, child);
|
__perf_event_exit_task(child_event, child_ctx, child);
|
||||||
|
|
||||||
list_for_each_entry_safe(child_event, tmp, &child_ctx->flexible_groups,
|
|
||||||
group_entry)
|
|
||||||
__perf_event_exit_task(child_event, child_ctx, child);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* If the last event was a group event, it will have appended all
|
|
||||||
* its siblings to the list, but we obtained 'tmp' before that which
|
|
||||||
* will still point to the list head terminating the iteration.
|
|
||||||
*/
|
|
||||||
if (!list_empty(&child_ctx->pinned_groups) ||
|
|
||||||
!list_empty(&child_ctx->flexible_groups))
|
|
||||||
goto again;
|
|
||||||
|
|
||||||
mutex_unlock(&child_ctx->mutex);
|
mutex_unlock(&child_ctx->mutex);
|
||||||
|
|
||||||
put_ctx(child_ctx);
|
put_ctx(child_ctx);
|
||||||
|
|
Loading…
Reference in New Issue
Block a user