soc: rockchip: add virtual poweroff support

[firefly-linux-kernel-4.4.55.git] / include / linux / jump_label.h

diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 8dde55974f186bca7c1488866aaacdd805c347b3..68904469fba1b7492efda1b846edab53ed1f3b4e 100644 (file)
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -5,7 +5,7 @@
  * Jump label support
  *
  * Copyright (C) 2009-2012 Jason Baron <jbaron@redhat.com>
- * Copyright (C) 2011-2012 Peter Zijlstra <pzijlstr@redhat.com>
+ * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra
  *
  * DEPRECATED API:
  *
@@ -117,13 +117,18 @@ struct module;
 
 #include <linux/atomic.h>
 
+#ifdef HAVE_JUMP_LABEL
+
 static inline int static_key_count(struct static_key *key)
 {
-       return atomic_read(&key->enabled);
+       /*
+        * -1 means the first static_key_slow_inc() is in progress.
+        *  static_key_enabled() must return true, so return 1 here.
+        */
+       int n = atomic_read(&key->enabled);
+       return n >= 0 ? n : 1;
 }
 
-#ifdef HAVE_JUMP_LABEL
-
 #define JUMP_TYPE_FALSE        0UL
 #define JUMP_TYPE_TRUE 1UL
 #define JUMP_TYPE_MASK 1UL
@@ -162,6 +167,11 @@ extern void jump_label_apply_nops(struct module *mod);
 
 #else  /* !HAVE_JUMP_LABEL */
 
+static inline int static_key_count(struct static_key *key)
+{
+       return atomic_read(&key->enabled);
+}
+
 static __always_inline void jump_label_init(void)
 {
        static_key_initialized = true;