jump_label: Define guard() for jump_label_lock

Link: https://lore.kernel.org/all/173371207108.480397.12818384744149153972.stgit@devnote2/

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Author: mhiramat

include/linux/jump_label.h

@@ -75,6 +75,7 @@
 
 #include <linux/types.h>
 #include <linux/compiler.h>
+#include <linux/cleanup.h>
 
 extern bool static_key_initialized;
 
@@ -347,6 +348,8 @@ static inline void static_key_disable(struct static_key *key)
 
 #endif	/* CONFIG_JUMP_LABEL */
 
+DEFINE_LOCK_GUARD_0(jump_label_lock, jump_label_lock(), jump_label_unlock())
+
 #define STATIC_KEY_INIT STATIC_KEY_INIT_FALSE
 #define jump_label_enabled static_key_enabled