Module Name: src
Committed By: riastradh
Date: Sat Apr 9 23:44:25 UTC 2022
Modified Files:
src/sys/external/bsd/drm2/include/linux: ratelimit.h
Log Message:
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...!)
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/sys/external/bsd/drm2/include/linux/ratelimit.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/include/linux/ratelimit.h
diff -u src/sys/external/bsd/drm2/include/linux/ratelimit.h:1.5 src/sys/external/bsd/drm2/include/linux/ratelimit.h:1.6
--- src/sys/external/bsd/drm2/include/linux/ratelimit.h:1.5 Sun Dec 19 11:36:57 2021
+++ src/sys/external/bsd/drm2/include/linux/ratelimit.h Sat Apr 9 23:44:25 2022
@@ -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);
