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authorriastradh <riastradh@NetBSD.org>2022-04-09 23:44:25 +0000
committerriastradh <riastradh@NetBSD.org>2022-04-09 23:44:25 +0000
commit03dd4f2e5ebd0a786fa4051069bd7361df790fdb (patch)
tree20839624b173b07b2d975b38ce231a5001e48d31 /sys/external/bsd/drm2/include
parent759280f383ea5f80515b30532a674970fa277422 (diff)
linux/ratelimit: Convert to membar_acquire and atomic_store_release.
Simplify while here: atomic_swap is enough, no need for atomic_cas. (Maybe drm'll run faster on sparcv8 this way...!)
Diffstat (limited to 'sys/external/bsd/drm2/include')
-rw-r--r--sys/external/bsd/drm2/include/linux/ratelimit.h9
1 files changed, 4 insertions, 5 deletions
diff --git a/sys/external/bsd/drm2/include/linux/ratelimit.h b/sys/external/bsd/drm2/include/linux/ratelimit.h
index 4628f71ec47..dbf830cfed6 100644
--- a/sys/external/bsd/drm2/include/linux/ratelimit.h
+++ b/sys/external/bsd/drm2/include/linux/ratelimit.h
@@ -1,4 +1,4 @@
-/* $NetBSD: ratelimit.h,v 1.5 2021/12/19 11:36:57 riastradh Exp $ */
+/* $NetBSD: ratelimit.h,v 1.6 2022/04/09 23:44:25 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -86,14 +86,13 @@ __ratelimit(struct ratelimit_state *r)
{
int ok;
- if (atomic_cas_uint(&r->rl_lock, 0, 1)) {
+ if (atomic_swap_uint(&r->rl_lock, 1)) {
ok = false;
goto out;
}
- membar_enter();
+ membar_acquire();
ok = ppsratecheck(&r->rl_lasttime, &r->rl_curpps, r->rl_maxpps);
- membar_exit();
- r->rl_lock = 0;
+ atomic_store_release(&r->rl_lock, 0);
out: if (!ok)
atomic_store_relaxed(&r->missed, 1);