constify security_sb_mount()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/security.c b/security/security.c
index 4a3e7e9..fc56765 100644
--- a/security/security.c
+++ b/security/security.c
@@ -302,7 +302,7 @@
 	return call_int_hook(sb_statfs, 0, dentry);
 }
 
-int security_sb_mount(const char *dev_name, struct path *path,
+int security_sb_mount(const char *dev_name, const struct path *path,
                        const char *type, unsigned long flags, void *data)
 {
 	return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);