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Commit f4be8433 authored by Jiang Liu's avatar Jiang Liu Committed by Catalin Marinas
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jump_label: use defined macros instead of hard-coding for better readability 



Use macro JUMP_LABEL_TRUE_BRANCH instead of hard-coding for better
readability.

Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Acked-by: default avatarJason Baron <jbaron@akamai.com>
Signed-off-by: default avatarJiang Liu <liuj97@gmail.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 9732cafd

include/linux/jump_label.h

+12 −7
Original line number Diff line number Diff line
@@ -81,18 +81,21 @@ struct module; 
#include <linux/atomic.h>

#ifdef HAVE_JUMP_LABEL



#define JUMP_LABEL_TRUE_BRANCH 1UL

#define JUMP_LABEL_TYPE_FALSE_BRANCH	0UL

#define JUMP_LABEL_TYPE_TRUE_BRANCH	1UL

#define JUMP_LABEL_TYPE_MASK		1UL



static

inline struct jump_entry *jump_label_get_entries(struct static_key *key)

{

	return (struct jump_entry *)((unsigned long)key->entries

						& ~JUMP_LABEL_TRUE_BRANCH);

						& ~JUMP_LABEL_TYPE_MASK);

}



static inline bool jump_label_get_branch_default(struct static_key *key)

{

	if ((unsigned long)key->entries & JUMP_LABEL_TRUE_BRANCH)

	if (((unsigned long)key->entries & JUMP_LABEL_TYPE_MASK) ==

	    JUMP_LABEL_TYPE_TRUE_BRANCH)

		return true;

	return false;

}
@@ -123,9 +126,11 @@ extern void static_key_slow_dec(struct static_key *key); 
extern void jump_label_apply_nops(struct module *mod);



#define STATIC_KEY_INIT_TRUE ((struct static_key)		\

	{ .enabled = ATOMIC_INIT(1), .entries = (void *)1 })

	{ .enabled = ATOMIC_INIT(1),				\

	  .entries = (void *)JUMP_LABEL_TYPE_TRUE_BRANCH })

#define STATIC_KEY_INIT_FALSE ((struct static_key)		\

	{ .enabled = ATOMIC_INIT(0), .entries = (void *)0 })

	{ .enabled = ATOMIC_INIT(0),				\

	  .entries = (void *)JUMP_LABEL_TYPE_FALSE_BRANCH })



#else  /* !HAVE_JUMP_LABEL */