vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root

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

arch/ia64/kernel/perfmon.c

@@ -2228,7 +2228,7 @@ pfm_alloc_file(pfm_context_t *ctx)
 	/*
 	 * allocate a new dcache entry
 	 */
-	path.dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
+	path.dentry = d_alloc(pfmfs_mnt->mnt_root, &this);
 	if (!path.dentry) {
 		iput(inode);
 		return ERR_PTR(-ENOMEM);

drivers/usb/core/inode.c

@@ -501,7 +501,7 @@ static int fs_create_by_name (const char *name, mode_t mode,
 	 */
 	if (!parent ) {
 		if (usbfs_mount && usbfs_mount->mnt_sb) {
-			parent = usbfs_mount->mnt_sb->s_root;
+			parent = usbfs_mount->mnt_root;
 		}
 	}
 
@@ -608,7 +608,7 @@ static int create_special_files (void)
 
 	ignore_mount = 0;
 
-	parent = usbfs_mount->mnt_sb->s_root;
+	parent = usbfs_mount->mnt_root;
 	devices_usbfs_dentry = fs_create_file ("devices",
 					       listmode | S_IFREG, parent,
 					       NULL, &usbfs_devices_fops,
@@ -662,7 +662,7 @@ static void usbfs_add_bus(struct usb_bus *bus)
 
 	sprintf (name, "%03d", bus->busnum);
 
-	parent = usbfs_mount->mnt_sb->s_root;
+	parent = usbfs_mount->mnt_root;
 	bus->usbfs_dentry = fs_create_file (name, busmode | S_IFDIR, parent,
 					    bus, NULL, busuid, busgid);
 	if (bus->usbfs_dentry == NULL) {

fs/configfs/dir.c

@@ -312,7 +312,7 @@ static int configfs_create_dir(struct config_item * item, struct dentry *dentry)
 	if (item->ci_parent)
 		parent = item->ci_parent->ci_dentry;
 	else if (configfs_mount && configfs_mount->mnt_sb)
-		parent = configfs_mount->mnt_sb->s_root;
+		parent = configfs_mount->mnt_root;
 	else
 		return -EFAULT;
 

fs/debugfs/inode.c

@@ -160,7 +160,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
 	 * have around.
 	 */
 	if (!parent)
-		parent = debugfs_mount->mnt_sb->s_root;
+		parent = debugfs_mount->mnt_root;
 
 	*dentry = NULL;
 	mutex_lock(&parent->d_inode->i_mutex);

fs/hppfs/hppfs.c

@@ -725,7 +725,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
 	sb->s_fs_info = proc_mnt;
 
 	err = -ENOMEM;
-	root_inode = get_inode(sb, dget(proc_mnt->mnt_sb->s_root));
+	root_inode = get_inode(sb, dget(proc_mnt->mnt_root));
 	if (!root_inode)
 		goto out_mntput;
 

security/inode.c

@@ -159,7 +159,7 @@ static int create_by_name(const char *name, mode_t mode,
 	 * have around.
 	 */
 	if (!parent)
-		parent = mount->mnt_sb->s_root;
+		parent = mount->mnt_root;
 
 	mutex_lock(&parent->d_inode->i_mutex);
 	*dentry = lookup_one_len(name, parent, strlen(name));