From: Jiang Liu <jiang....@huawei.com>
Use macro JUMP_LABEL_TRUE_BRANCH instead of hard-coding for better
readability.
Signed-off-by: Jiang Liu <jiang....@huawei.com>
Cc: Jiang Liu <liu...@gmail.com>
---
include/linux/jump_label.h | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index a507907..6e54029 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -74,18 +74,21 @@ 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;
}
@@ -116,9 +119,11 @@ 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 */
--
1.8.1.2
--
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