constify dentry_operations: FUSE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index fdff346..06da052 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -224,7 +224,7 @@
 	return !nodeid || nodeid == FUSE_ROOT_ID;
 }
 
-struct dentry_operations fuse_dentry_operations = {
+const struct dentry_operations fuse_dentry_operations = {
 	.d_revalidate	= fuse_dentry_revalidate,
 };