qstr: constify dentry_init_security

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 7ae3976..101bf19 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1356,7 +1356,7 @@
 					struct super_block *newsb);
 	int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
 	int (*dentry_init_security)(struct dentry *dentry, int mode,
-					struct qstr *name, void **ctx,
+					const struct qstr *name, void **ctx,
 					u32 *ctxlen);