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authorDavid S. Miller <davem@davemloft.net>2016-06-30 05:03:36 -0400
committerDavid S. Miller <davem@davemloft.net>2016-06-30 05:03:36 -0400
commitee58b57100ca953da7320c285315a95db2f7053d (patch)
tree77b815a31240adc4d6326346908137fc6c2c3a96 /include/linux/jump_label.h
parent6f30e8b022c8e3a722928ddb1a2ae0be852fcc0e (diff)
parente7bdea7750eb2a64aea4a08fa5c0a31719c8155d (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Several cases of overlapping changes, except the packet scheduler conflicts which deal with the addition of the free list parameter to qdisc_enqueue(). Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/jump_label.h')
-rw-r--r--include/linux/jump_label.h16
1 files changed, 13 insertions, 3 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 0536524bb9eb..68904469fba1 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -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;