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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: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: Jiang Liu <liuj97@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Jiang Liu 2014-01-07 22:17:14 +08:00 committed by Catalin Marinas
parent 9732cafd9d
commit f4be8433fc
1 changed files with 12 additions and 7 deletions
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19
include/linux/jump_label.h
View File

@ -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;
}
@ -122,10 +125,12 @@ extern void static_key_slow_inc(struct static_key *key);
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 })
#define STATIC_KEY_INIT_FALSE ((struct static_key) \
{ .enabled = ATOMIC_INIT(0), .entries = (void *)0 })
#define STATIC_KEY_INIT_TRUE ((struct static_key) \
{ .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 *)JUMP_LABEL_TYPE_FALSE_BRANCH })
#else /* !HAVE_JUMP_LABEL */