r/o bind mounts: give permission() a local 'mnt' variable
First of all, this makes the structure jumping look a little bit cleaner. So,
this stands alone as a tiny cleanup. But, we also need 'mnt' by itself a few
more times later in this series, so this isn't _just_ a cleanup.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/namei.c b/fs/namei.c
index a29bb0f..464eecc 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -228,6 +228,10 @@
int permission(struct inode *inode, int mask, struct nameidata *nd)
{
int retval, submask;
+ struct vfsmount *mnt = NULL;
+
+ if (nd)
+ mnt = nd->mnt;
if (mask & MAY_WRITE) {
umode_t mode = inode->i_mode;
@@ -251,7 +255,7 @@
* MAY_EXEC on regular files is denied if the fs is mounted
* with the "noexec" flag.
*/
- if (nd && nd->mnt && (nd->mnt->mnt_flags & MNT_NOEXEC))
+ if (mnt && (mnt->mnt_flags & MNT_NOEXEC))
return -EACCES;
}