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afs: inode: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

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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 <[email protected]>
Signed-off-by: David Howells <[email protected]>
This commit is contained in:
Andreea-Cristina Bernat 2017-03-16 16:27:45 +00:00 • committed by David Howells
commit 1d7e4ebf29
1 changed files with 1 additions and 1 deletions
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2
fs/afs/inode.c
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@ -445,7 +445,7 @@ void afs_evict_inode(struct inode *inode)
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)
call_rcu(&permits->rcu, afs_zap_permits);