[PATCH] namei fixes (8/19)

In open_namei() we never use path.mnt or path.dentry after exit: or ok:.
Assignment of path.dentry in case of LAST_BIND is dead code and only
obfuscates already convoluted function; assignment of path.mnt after
__do_follow_link() can be moved down to the place where we set path.dentry.

Obviously equivalent transformations, just to clean the air a bit in that
region.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/namei.c b/fs/namei.c
index 18ea060..3d08478 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1526,14 +1526,11 @@ do_link:
        if (error)
                goto exit_dput;
        error = __do_follow_link(&path, nd);
-       path.mnt = nd->mnt;
        if (error)
                return error;
        nd->flags &= ~LOOKUP_PARENT;
-       if (nd->last_type == LAST_BIND) {
-               path.dentry = nd->dentry;
+       if (nd->last_type == LAST_BIND)
                goto ok;
-       }
        error = -EISDIR;
        if (nd->last_type != LAST_NORM)
                goto exit;
@@ -1549,6 +1546,7 @@ do_link:
        dir = nd->dentry;
        down(&dir->d_inode->i_sem);
        path.dentry = __lookup_hash(&nd->last, nd->dentry, nd);
+       path.mnt = nd->mnt;
        putname(nd->last.name);
        goto do_last;
 }