ecryptfs: switch ecryptfs_decode_and_decrypt_filename() from dentry to sb

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5eab400..a2f2bb2 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -679,7 +679,7 @@
 	set_fs(old_fs);
 	if (rc < 0)
 		goto out;
-	rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry,
+	rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry->d_sb,
 						  lower_buf, rc);
 out:
 	kfree(lower_buf);