Rename the JUMP_LABEL_TYPE_* macros to be JUMP_TYPE_* and move the
inline helpers into kernel/jump_label.c, since that's the only place
they're ever used.
Also rename the helpers.
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
---
include/linux/jump_label.h | 25 +++++--------------------
kernel/jump_label.c | 25 ++++++++++++++++---------
2 files changed, 21 insertions(+), 29 deletions(-)
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -101,24 +101,9 @@ static inline int static_key_count(struc
#ifdef HAVE_JUMP_LABEL
-#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_TYPE_MASK);
-}
-
-static inline bool jump_label_get_branch_default(struct static_key *key)
-{
- if (((unsigned long)key->entries & JUMP_LABEL_TYPE_MASK) ==
- JUMP_LABEL_TYPE_TRUE_BRANCH)
- return true;
- return false;
-}
+#define JUMP_TYPE_FALSE 0UL
+#define JUMP_TYPE_TRUE 1UL
+#define JUMP_TYPE_MASK 1UL
static __always_inline bool static_key_false(struct static_key *key)
{
@@ -147,10 +132,10 @@ extern void jump_label_apply_nops(struct
#define STATIC_KEY_INIT_TRUE ((struct static_key) \
{ .enabled = ATOMIC_INIT(1), \
- .entries = (void *)JUMP_LABEL_TYPE_TRUE_BRANCH })
+ .entries = (void *)JUMP_TYPE_TRUE })
#define STATIC_KEY_INIT_FALSE ((struct static_key) \
{ .enabled = ATOMIC_INIT(0), \
- .entries = (void *)JUMP_LABEL_TYPE_FALSE_BRANCH })
+ .entries = (void *)JUMP_TYPE_FALSE })
#else /* !HAVE_JUMP_LABEL */
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -56,6 +56,11 @@ jump_label_sort_entries(struct jump_entr
static void jump_label_update(struct static_key *key, int enable);
+static inline bool static_key_type(struct static_key *key)
+{
+ return (unsigned long)key->entries & JUMP_TYPE_MASK;
+}
+
void static_key_slow_inc(struct static_key *key)
{
STATIC_KEY_CHECK_USE();
@@ -64,7 +69,7 @@ void static_key_slow_inc(struct static_k
jump_label_lock();
if (atomic_read(&key->enabled) == 0) {
- if (!jump_label_get_branch_default(key))
+ if (!static_key_type(key))
jump_label_update(key, JUMP_LABEL_JMP);
else
jump_label_update(key, JUMP_LABEL_NOP);
@@ -87,7 +92,7 @@ static void __static_key_slow_dec(struct
atomic_inc(&key->enabled);
schedule_delayed_work(work, rate_limit);
} else {
- if (!jump_label_get_branch_default(key))
+ if (!static_key_type(key))
jump_label_update(key, JUMP_LABEL_NOP);
else
jump_label_update(key, JUMP_LABEL_JMP);
@@ -178,15 +183,17 @@ static void __jump_label_update(struct s
}
}
-static enum jump_label_type jump_label_type(struct static_key *key)
+static inline struct jump_entry *static_key_entries(struct static_key *key)
{
- bool true_branch = jump_label_get_branch_default(key);
- bool state = static_key_enabled(key);
+ return (struct jump_entry *)((unsigned long)key->entries &
~JUMP_TYPE_MASK);
+}
- if ((!true_branch && state) || (true_branch && !state))
- return JUMP_LABEL_JMP;
+static enum jump_label_type jump_label_type(struct static_key *key)
+{
+ bool enabled = static_key_enabled(key);
+ bool type = static_key_type(key);
- return JUMP_LABEL_NOP;
+ return enabled ^ type;
}
void __init jump_label_init(void)
@@ -442,7 +449,7 @@ int jump_label_text_reserved(void *start
static void jump_label_update(struct static_key *key, int enable)
{
struct jump_entry *stop = __stop___jump_table;
- struct jump_entry *entry = jump_label_get_entries(key);
+ struct jump_entry *entry = static_key_entries(key);
#ifdef CONFIG_MODULES
struct module *mod;
--
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