do_new_mount{,_fc}(): constify struct path argument

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: Al Viro

fs/namespace.c

@@ -3698,7 +3698,7 @@ static bool mount_too_revealing(const struct super_block *sb, int *new_mnt_flags
  * Create a new mount using a superblock configuration and request it
  * be added to the namespace tree.
  */
-static int do_new_mount_fc(struct fs_context *fc, struct path *mountpoint,
+static int do_new_mount_fc(struct fs_context *fc, const struct path *mountpoint,
 			   unsigned int mnt_flags)
 {
 	struct super_block *sb;
@@ -3729,8 +3729,9 @@ static int do_new_mount_fc(struct fs_context *fc, struct path *mountpoint,
  * create a new mount for userspace and request it to be added into the
  * namespace's tree
  */
-static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
-			int mnt_flags, const char *name, void *data)
+static int do_new_mount(const struct path *path, const char *fstype,
+			int sb_flags, int mnt_flags,
+			const char *name, void *data)
 {
 	struct file_system_type *type;
 	struct fs_context *fc;