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| author | Andreea-Cristina Bernat <bernat.ada@gmail.com> | 2014-08-22 16:15:36 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-09-09 06:53:04 +0200 |
| commit | e0455e194a5e0cf49bc7596a20d4f7e47995b9c6 (patch) | |
| tree | 345bbec58cd7b2efcaf9752b7879f75229a7e950 /kernel/events/callchain.c | |
| parent | Merge tag 'v3.17-rc4' into perf/core, to pick up fixes (diff) | |
| download | linux-e0455e194a5e0cf49bc7596a20d4f7e47995b9c6.tar.xz linux-e0455e194a5e0cf49bc7596a20d4f7e47995b9c6.zip | |
perf/callchain: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:
"1. This use of RCU_INIT_POINTER() is NULLing out the pointer"
it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.
The following Coccinelle semantic patch was used:
@@
@@
- rcu_assign_pointer
+ RCU_INIT_POINTER
(..., NULL)
Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: paulmck@linux.vnet.ibm.com
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Link: http://lkml.kernel.org/r/20140822141536.GA32051@ada
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events/callchain.c')
| -rw-r--r-- | kernel/events/callchain.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index 97b67df8fbfe..f2a88de87a49 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -52,7 +52,7 @@ static void release_callchain_buffers(void) struct callchain_cpus_entries *entries; entries = callchain_cpus_entries; - rcu_assign_pointer(callchain_cpus_entries, NULL); + RCU_INIT_POINTER(callchain_cpus_entries, NULL); call_rcu(&entries->rcu_head, release_callchain_buffers_rcu); } |