afs: security: 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: David Howells <dhowells@redhat.com>

diff --git a/fs/afs/security.c b/fs/afs/security.c
index bfa9d342838355b817703fe3a3e4b6e692fdedb0..ecb86a6701801cb74745bc99b74f9d8a367a2792 100644 (file)
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -114,7 +114,7 @@ void afs_clear_permits(struct afs_vnode *vnode)
 
        mutex_lock(&vnode->permits_lock);
        permits = vnode->permits;
-       rcu_assign_pointer(vnode->permits, NULL);
+       RCU_INIT_POINTER(vnode->permits, NULL);
        mutex_unlock(&vnode->permits_lock);
 
        if (permits)