Commit-ID: 3e27bdd5a4fc7954af4027f1a77e9556deed653d Gitweb: http://git.kernel.org/tip/3e27bdd5a4fc7954af4027f1a77e9556deed653d Author: Thomas Gleixner <t...@linutronix.de> AuthorDate: Tue, 18 Apr 2017 19:05:02 +0200 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Thu, 20 Apr 2017 13:08:56 +0200
perf/core: Remove redundant get_online_cpus() SyS_perf_event_open() calls get_online_cpus() and eventually invokes swevent_hlist_get() which does it again. All callchains leading to swevent_hlist_get() originate from SyS_perf_event_open() so the extra protection is redundant. Remove it. Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Sebastian Siewior <bige...@linutronix.de> Cc: Steven Rostedt <rost...@goodmis.org> Link: http://lkml.kernel.org/r/20170418170554.043759...@linutronix.de --- kernel/events/core.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index ff01cba..634dd95 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7592,7 +7592,6 @@ static int swevent_hlist_get(void) { int err, cpu, failed_cpu; - get_online_cpus(); for_each_possible_cpu(cpu) { err = swevent_hlist_get_cpu(cpu); if (err) { @@ -7600,8 +7599,6 @@ static int swevent_hlist_get(void) goto fail; } } - put_online_cpus(); - return 0; fail: for_each_possible_cpu(cpu) { @@ -7609,8 +7606,6 @@ fail: break; swevent_hlist_put_cpu(cpu); } - - put_online_cpus(); return err; }
