Module Name: src
Committed By: riastradh
Date: Sun Feb 27 19:22:20 UTC 2022
Modified Files:
src/sys/arch/mips/include: asm.h
Log Message:
mips: Redefine LLSCSYNC as empty on non-Octeon MP.
This change deletes memory barriers on non-Octeon MP. However, all
the appropriate acquire and release barriers are already used in
mutex stubs, and no barriers are needed in atomic_* unless we set
__HAVE_ATOMIC_AS_MEMBAR which we don't on MIPS. So this should be
safe.
Unclear whether we need this even on Octeon -- don't have a clear
reference on why it's here.
To generate a diff of this commit:
cvs rdiff -u -r1.68 -r1.69 src/sys/arch/mips/include/asm.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/arch/mips/include/asm.h
diff -u src/sys/arch/mips/include/asm.h:1.68 src/sys/arch/mips/include/asm.h:1.69
--- src/sys/arch/mips/include/asm.h:1.68 Sun Feb 27 19:22:12 2022
+++ src/sys/arch/mips/include/asm.h Sun Feb 27 19:22:20 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: asm.h,v 1.68 2022/02/27 19:22:12 riastradh Exp $ */
+/* $NetBSD: asm.h,v 1.69 2022/02/27 19:22:20 riastradh Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -581,7 +581,7 @@ _C_LABEL(x):
#define BDSYNC_PLUNGER sync 4
#define SYNC_PLUNGER sync 4
#elif __mips >= 3 || !defined(__mips_o32)
-#define LLSCSYNC sync
+#define LLSCSYNC /* nothing */
#define BDSYNC sync
#define BDSYNC_ACQ sync
#define SYNC_ACQ sync
