Module Name: src
Committed By: riastradh
Date: Sun Dec 19 11:02:54 UTC 2021
Modified Files:
src/sys/external/bsd/common/include/asm: barrier.h
Log Message:
Use adequate memory barrier for load-acquire semantics.
It is unfortunate that we chose the name membar_enter to have the
wrong semantics for this.
To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/sys/external/bsd/common/include/asm/barrier.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/asm/barrier.h
diff -u src/sys/external/bsd/common/include/asm/barrier.h:1.7 src/sys/external/bsd/common/include/asm/barrier.h:1.8
--- src/sys/external/bsd/common/include/asm/barrier.h:1.7 Sun Dec 19 11:02:46 2021
+++ src/sys/external/bsd/common/include/asm/barrier.h Sun Dec 19 11:02:54 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: barrier.h,v 1.7 2021/12/19 11:02:46 riastradh Exp $ */
+/* $NetBSD: barrier.h,v 1.8 2021/12/19 11:02:54 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -72,7 +72,7 @@
#if defined(MULTIPROCESSOR) && !defined(__HAVE_ATOMIC_AS_MEMBAR)
# define smp_mb__before_atomic() membar_exit()
-# define smp_mb__after_atomic() membar_enter()
+# define smp_mb__after_atomic() membar_sync() /* XXX acquire */
#else
# define smp_mb__before_atomic() __insn_barrier()
# define smp_mb__after_atomic() __insn_barrier()
