jump-label: initialize jump-label subsystem much earlier
Initialize jump_labels much, much earlier, so they're available for use
during system setup.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 56594e4..388b0d4 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -16,7 +16,7 @@
# include <asm/jump_label.h>
# define HAVE_JUMP_LABEL
-#endif
+#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */
enum jump_label_type {
JUMP_LABEL_DISABLE = 0,
@@ -41,6 +41,7 @@
extern struct jump_entry __start___jump_table[];
extern struct jump_entry __stop___jump_table[];
+extern void jump_label_init(void);
extern void jump_label_lock(void);
extern void jump_label_unlock(void);
extern void arch_jump_label_transform(struct jump_entry *entry,
@@ -53,7 +54,7 @@
extern bool jump_label_enabled(struct jump_label_key *key);
extern void jump_label_apply_nops(struct module *mod);
-#else
+#else /* !HAVE_JUMP_LABEL */
#include <linux/atomic.h>
@@ -63,6 +64,10 @@
atomic_t enabled;
};
+static __always_inline void jump_label_init(void)
+{
+}
+
static __always_inline bool static_branch(struct jump_label_key *key)
{
if (unlikely(atomic_read(&key->enabled)))
@@ -97,7 +102,6 @@
{
return 0;
}
+#endif /* HAVE_JUMP_LABEL */
-#endif
-
-#endif
+#endif /* _LINUX_JUMP_LABEL_H */