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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-12 12:51:09 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-17 15:02:21 -0800
commitadd1f0995454374d90c9d6b2c420d2fba3d0a4e3 (patch)
tree8659ba52925b00f7843bb806f29c5cf4bae76348 /fs
parentae1670339c95c3ff96ab10582506cf827c5fecc8 (diff)
downloadop-kernel-dev-add1f0995454374d90c9d6b2c420d2fba3d0a4e3.zip
op-kernel-dev-add1f0995454374d90c9d6b2c420d2fba3d0a4e3.tar.gz
fs: Substitute rcu_access_pointer() for rcu_dereference_raw()
(Trivial patch.) If the code is looking at the RCU-protected pointer itself, but not dereferencing it, the rcu_dereference() functions can be downgraded to rcu_access_pointer(). This commit makes this downgrade in __alloc_fd(), which simply compares the RCU-protected pointer against NULL with no dereferencing. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/file.c b/fs/file.c
index db25c2b..18f7d27 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -497,7 +497,7 @@ repeat:
error = fd;
#if 1
/* Sanity check */
- if (rcu_dereference_raw(fdt->fd[fd]) != NULL) {
+ if (rcu_access_pointer(fdt->fd[fd]) != NULL) {
printk(KERN_WARNING "alloc_fd: slot %d not NULL!\n", fd);
rcu_assign_pointer(fdt->fd[fd], NULL);
}
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