Module Name: src
Committed By: riastradh
Date: Sun Jul 17 08:34:00 UTC 2022
Modified Files:
src/sys/external/bsd/common/include/linux: compiler.h
Log Message:
linux/compiler.h: Add missing barriers in READ_ONCE, WRITE_ONCE.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/external/bsd/common/include/linux/compiler.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/common/include/linux/compiler.h
diff -u src/sys/external/bsd/common/include/linux/compiler.h:1.8 src/sys/external/bsd/common/include/linux/compiler.h:1.9
--- src/sys/external/bsd/common/include/linux/compiler.h:1.8 Sat Apr 9 23:43:31 2022
+++ src/sys/external/bsd/common/include/linux/compiler.h Sun Jul 17 08:34:00 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: compiler.h,v 1.8 2022/04/09 23:43:31 riastradh Exp $ */
+/* $NetBSD: compiler.h,v 1.9 2022/07/17 08:34:00 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -62,6 +62,7 @@
BUILD_BUG_ON_ZERO(__same_type((X), &(X)[0]))
#define READ_ONCE(X) ({ \
+ __insn_barrier(); \
typeof(X) __read_once_tmp = (X); \
membar_datadep_consumer(); \
__read_once_tmp; \
@@ -69,7 +70,9 @@
#define WRITE_ONCE(X, V) ({ \
typeof(X) __write_once_tmp = (V); \
+ __insn_barrier(); \
(X) = __write_once_tmp; \
+ __insn_barrier(); \
__write_once_tmp; \
})
