Commit-ID: 62a92c8f553e49270a0ee391b8733da71ab0aebc Gitweb: http://git.kernel.org/tip/62a92c8f553e49270a0ee391b8733da71ab0aebc Author: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> AuthorDate: Tue, 7 Jun 2016 15:44:15 +0300 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Wed, 8 Jun 2016 14:30:01 +0200 perf/core: Remove a redundant check There is no way to end up in _free_event() with event::pmu being NULL. The latter is initialized in event allocation path and remains set forever. In case of allocation failure, the error path doesn't use _free_event(). Having the check, however, suggests that it is possible to have a event::pmu==NULL situation in _free_event() and confuses the robots. This patch gets rid of the check. Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: eranian@xxxxxxxxxx Cc: vince@xxxxxxxxxx Link: http://lkml.kernel.org/r/1465303455-26032-1-git-send-email-alexander.shishkin@xxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- kernel/events/core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 050a290..87e945d 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3862,10 +3862,8 @@ static void _free_event(struct perf_event *event) if (event->ctx) put_ctx(event->ctx); - if (event->pmu) { - exclusive_event_destroy(event); - module_put(event->pmu->module); - } + exclusive_event_destroy(event); + module_put(event->pmu->module); call_rcu(&event->rcu_head, free_event_rcu); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html