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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-02-12 12:51:09 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-02-17 15:02:21 -0800 |
| commit | add1f0995454374d90c9d6b2c420d2fba3d0a4e3 (patch) | |
| tree | 8659ba52925b00f7843bb806f29c5cf4bae76348 /fs/file.c | |
| parent | ae1670339c95c3ff96ab10582506cf827c5fecc8 (diff) | |
| download | linux-add1f0995454374d90c9d6b2c420d2fba3d0a4e3.tar.bz2 | |
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/file.c')
| -rw-r--r-- | fs/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/file.c b/fs/file.c index db25c2bdfe46..18f7d27855c4 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); } |