vfs: do_last(): use inode variable

Use helper variable instead of path->dentry->d_inode before complete_walk().
This will allow this code to be used in RCU mode.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/namei.c b/fs/namei.c
index f6b31c94c110..41445e7fd339 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2358,15 +2358,17 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
         if (error)
                 nd->flags |= LOOKUP_JUMPED;
 
+        BUG_ON(nd->flags & LOOKUP_RCU);
+        inode = path->dentry->d_inode;
         error = -ENOENT;
-        if (!path->dentry->d_inode)
+        if (!inode)
                 goto exit_dput;
 
-        if (path->dentry->d_inode->i_op->follow_link)
+        if (inode->i_op->follow_link)
                 return NULL;
 
         path_to_nameidata(path, nd);
-        nd->inode = path->dentry->d_inode;
+        nd->inode = inode;
         /* Why this, you ask?  _Now_ we might have grown LOOKUP_JUMPED... */
         error = complete_walk(nd);
         if (error)