Module Name: src
Committed By: riastradh
Date: Sun Dec 19 01:39:27 UTC 2021
Modified Files:
src/sys/external/bsd/drm2/include/linux: atomic.h
Log Message:
Guarantee no repeated loads.
To generate a diff of this commit:
cvs rdiff -u -r1.25 -r1.26 src/sys/external/bsd/drm2/include/linux/atomic.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/atomic.h
diff -u src/sys/external/bsd/drm2/include/linux/atomic.h:1.25 src/sys/external/bsd/drm2/include/linux/atomic.h:1.26
--- src/sys/external/bsd/drm2/include/linux/atomic.h:1.25 Sun Dec 19 01:39:20 2021
+++ src/sys/external/bsd/drm2/include/linux/atomic.h Sun Dec 19 01:39:27 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: atomic.h,v 1.25 2021/12/19 01:39:20 riastradh Exp $ */
+/* $NetBSD: atomic.h,v 1.26 2021/12/19 01:39:27 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -207,6 +207,7 @@ atomic_add_unless(atomic_t *atomic, int
smp_mb__before_atomic();
do {
value = atomic->a_u.au_int;
+ __insn_barrier();
if (value == zero)
break;
} while (atomic_cas_uint(&atomic->a_u.au_uint, value, (value + addend))
@@ -389,6 +390,7 @@ atomic_long_add_unless(struct atomic_lon
smp_mb__before_atomic();
do {
value = (long)a->al_v;
+ __insn_barrier();
if (value == zero)
break;
} while (atomic_cas_ulong(&a->al_v, (unsigned long)value,
