Commit-ID: 70691d4a0bf7c871559d4ef1b0056edefbca123b
Gitweb: http://git.kernel.org/tip/70691d4a0bf7c871559d4ef1b0056edefbca123b
Author: Andreea-Cristina Bernat <bernat.ada@xxxxxxxxx>
AuthorDate: Fri, 22 Aug 2014 16:26:05 +0300
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 9 Sep 2014 06:53:05 +0200
perf/core: 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@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140822132605.GA20130@ada
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/events/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 01bd42e..f917dec 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5908,7 +5908,7 @@ static void swevent_hlist_release(struct swevent_htable *swhash)
if (!hlist)
return;
- rcu_assign_pointer(swhash->swevent_hlist, NULL);
+ RCU_INIT_POINTER(swhash->swevent_hlist, NULL);
kfree_rcu(hlist, rcu_head);
}
--
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