autofs - constify misc struct path instances

Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/autofs4/expire.c

@@ -593,7 +593,7 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
 
 	if (dentry) {
 		struct autofs_info *ino = autofs4_dentry_ino(dentry);
-		struct path path = { .mnt = mnt, .dentry = dentry };
+		const struct path path = { .mnt = mnt, .dentry = dentry };
 
 		/* This is synchronous because it makes the daemon a
 		 * little easier

fs/autofs4/root.c

@@ -297,7 +297,7 @@ static int do_expire_wait(const struct path *path, bool rcu_walk)
 	if (!expiring)
 		return autofs4_expire_wait(path, rcu_walk);
 	else {
-		struct path this = { .mnt = path->mnt, .dentry = expiring };
+		const struct path this = { .mnt = path->mnt, .dentry = expiring };
 		/*
 		 * If we are racing with expire the request might not
 		 * be quite complete, but the directory has been removed