switch follow_up() to struct path

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/autofs4/dev-ioctl.c

@@ -212,7 +212,7 @@ static int find_autofs_mount(const char *pathname,
 				err = 0;
 			}
 		}
-		if (!follow_up(&path.mnt, &path.dentry))
+		if (!follow_up(&path))
 			break;
 	}
 	path_put(&path);

fs/namei.c

@@ -675,23 +675,23 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
 	return err;
 }
 
-int follow_up(struct vfsmount **mnt, struct dentry **dentry)
+int follow_up(struct path *path)
 {
 	struct vfsmount *parent;
 	struct dentry *mountpoint;
 	spin_lock(&vfsmount_lock);
-	parent=(*mnt)->mnt_parent;
-	if (parent == *mnt) {
+	parent = path->mnt->mnt_parent;
+	if (parent == path->mnt) {
 		spin_unlock(&vfsmount_lock);
 		return 0;
 	}
 	mntget(parent);
-	mountpoint=dget((*mnt)->mnt_mountpoint);
+	mountpoint = dget(path->mnt->mnt_mountpoint);
 	spin_unlock(&vfsmount_lock);
-	dput(*dentry);
-	*dentry = mountpoint;
-	mntput(*mnt);
-	*mnt = parent;
+	dput(path->dentry);
+	path->dentry = mountpoint;
+	mntput(path->mnt);
+	path->mnt = parent;
 	return 1;
 }
 

fs/nfsd/vfs.c

@@ -173,7 +173,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
 					    .dentry = dget(dparent)};
 
 			while (path.dentry == path.mnt->mnt_root &&
-			       follow_up(&path.mnt, &path.dentry))
+			       follow_up(&path))
 				;
 			dp = dget_parent(path.dentry);
 			dput(path.dentry);

include/linux/namei.h

@@ -79,7 +79,7 @@ extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
 extern struct dentry *lookup_one_noperm(const char *, struct dentry *);
 
 extern int follow_down(struct vfsmount **, struct dentry **);
-extern int follow_up(struct vfsmount **, struct dentry **);
+extern int follow_up(struct path *);
 
 extern struct dentry *lock_rename(struct dentry *, struct dentry *);
 extern void unlock_rename(struct dentry *, struct dentry *);