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authorEric Biggers <ebiggers@google.com>2017-10-09 14:30:52 -0700
committerDavid S. Miller <davem@davemloft.net>2017-10-09 20:26:23 -0700
commitcf4c950b87ee2f547ad3abd3aca6ae3f3eb3443f (patch)
treeec62d0b29fcd7361e4abb8cdc95042597571cf2c /lib/once.c
parentd93fa2ba64384a0bbee4ae7409d85fccb2cfcf14 (diff)
downloadlwn-cf4c950b87ee2f547ad3abd3aca6ae3f3eb3443f.tar.gz
lwn-cf4c950b87ee2f547ad3abd3aca6ae3f3eb3443f.zip
once: switch to new jump label API
Switch the DO_ONCE() macro from the deprecated jump label API to the new one. The new one is more readable, and for DO_ONCE() it also makes the generated code more icache-friendly: now the one-time initialization code is placed out-of-line at the jump target, rather than at the inline fallthrough case. Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/once.c')
-rw-r--r--lib/once.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/once.c b/lib/once.c
index 05c8604627eb..831c5a6b0bb2 100644
--- a/lib/once.c
+++ b/lib/once.c
@@ -5,7 +5,7 @@
struct once_work {
struct work_struct work;
- struct static_key *key;
+ struct static_key_true *key;
};
static void once_deferred(struct work_struct *w)
@@ -14,11 +14,11 @@ static void once_deferred(struct work_struct *w)
work = container_of(w, struct once_work, work);
BUG_ON(!static_key_enabled(work->key));
- static_key_slow_dec(work->key);
+ static_branch_disable(work->key);
kfree(work);
}
-static void once_disable_jump(struct static_key *key)
+static void once_disable_jump(struct static_key_true *key)
{
struct once_work *w;
@@ -51,7 +51,7 @@ bool __do_once_start(bool *done, unsigned long *flags)
}
EXPORT_SYMBOL(__do_once_start);
-void __do_once_done(bool *done, struct static_key *once_key,
+void __do_once_done(bool *done, struct static_key_true *once_key,
unsigned long *flags)
__releases(once_lock)
{