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sparc64/membar_ops: Upgrade membar_enter from R/RW to RW/RW. 

This will be deprecated soon but let's avoid leaving rakes to trip on
with it arising from disagreement over the documentation (W/RW) and
implementation and usage (R/RW).
This commit is contained in:
riastradh 2022-04-09 22:53:25 +00:00
parent ca73d72920
commit 48b2cb5aa9
1 changed files with 6 additions and 5 deletions
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11
common/lib/libc/arch/sparc64/atomic/membar_ops.S
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@ -1,4 +1,4 @@
/* $NetBSD: membar_ops.S,v 1.7 2022/04/09 12:06:47 riastradh Exp $ */
/* $NetBSD: membar_ops.S,v 1.8 2022/04/09 22:53:25 riastradh Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
@ -35,8 +35,9 @@
/*
* These assume Total Store Order (TSO), which may reorder
* store-before-load but nothing else. Hence, only membar_sync must
* issue anything -- namely, membar #StoreLoad.
* store-before-load but nothing else. Hence, only membar_sync (and
* its deprecated alias membar_enter) must issue anything -- namely,
* membar #StoreLoad.
*
* If we ran with Partial Store Order (PSO), we would also need to
* issue membar #StoreStore for membar_exit (load/store-before-store)
@ -73,8 +74,8 @@ END(_membar_sync)
ATOMIC_OP_ALIAS(membar_producer,_membar_consumer)
STRONG_ALIAS(_membar_producer,_membar_consumer)
ATOMIC_OP_ALIAS(membar_consumer,_membar_consumer)
ATOMIC_OP_ALIAS(membar_enter,_membar_consumer)
STRONG_ALIAS(_membar_enter,_membar_consumer)
ATOMIC_OP_ALIAS(membar_enter,_membar_sync)
STRONG_ALIAS(_membar_enter,_membar_sync)
ATOMIC_OP_ALIAS(membar_exit,_membar_consumer)
STRONG_ALIAS(_membar_exit,_membar_consumer)
ATOMIC_OP_ALIAS(membar_sync,_membar_sync)