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Diffstat (limited to 'include/linux/jump_label.h')
-rw-r--r--include/linux/jump_label.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index a5079072da66..39999775b922 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -48,6 +48,13 @@
#include <linux/types.h>
#include <linux/compiler.h>
+#include <linux/bug.h>
+
+extern bool static_key_initialized;
+
+#define STATIC_KEY_CHECK_USE() WARN(!static_key_initialized, \
+ "%s used before call to jump_label_init", \
+ __func__)
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
@@ -128,29 +135,32 @@ struct static_key {
static __always_inline void jump_label_init(void)
{
+ static_key_initialized = true;
}
static __always_inline bool static_key_false(struct static_key *key)
{
- if (unlikely(atomic_read(&key->enabled)) > 0)
+ if (unlikely(atomic_read(&key->enabled) > 0))
return true;
return false;
}
static __always_inline bool static_key_true(struct static_key *key)
{
- if (likely(atomic_read(&key->enabled)) > 0)
+ if (likely(atomic_read(&key->enabled) > 0))
return true;
return false;
}
static inline void static_key_slow_inc(struct static_key *key)
{
+ STATIC_KEY_CHECK_USE();
atomic_inc(&key->enabled);
}
static inline void static_key_slow_dec(struct static_key *key)
{
+ STATIC_KEY_CHECK_USE();
atomic_dec(&key->enabled);
}