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sparc/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 22:53:17 +00:00
parent 43b30eb233
commit ca73d72920
1 changed files with 7 additions and 7 deletions
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14
common/lib/libc/arch/sparc/atomic/membar_ops.S
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@ -1,4 +1,4 @@
/* $NetBSD: membar_ops.S,v 1.6 2022/04/09 12:06:39 riastradh Exp $ */ /* $NetBSD: membar_ops.S,v 1.7 2022/04/09 22:53:17 riastradh Exp $ */
/*- /*-
* Copyright (c) 2007 The NetBSD Foundation, Inc. * Copyright (c) 2007 The NetBSD Foundation, Inc.
@ -39,10 +39,10 @@
/* /*
* These assume Total Store Order (TSO), which may reorder * These assume Total Store Order (TSO), which may reorder
* store-before-load but nothing else. Hence, only membar_sync must * store-before-load but nothing else. Hence, only membar_sync (and
* issue anything -- specifically, an LDSTUB, which (along with SWAP) * its deprecated alias membar_enter) must issue anything --
* is the only instruction that implies a sequential consistency * specifically, an LDSTUB, which (along with SWAP) is the only
* barrier. * instruction that implies a sequential consistency barrier.
* *
* If we ran with Partial Store Order (PSO), we would also need to * If we ran with Partial Store Order (PSO), we would also need to
* issue STBAR for membar_exit (load/store-before-store) and * issue STBAR for membar_exit (load/store-before-store) and
@ -66,8 +66,8 @@ END(_membar_sync)
ATOMIC_OP_ALIAS(membar_producer,_membar_consumer) ATOMIC_OP_ALIAS(membar_producer,_membar_consumer)
STRONG_ALIAS(_membar_producer,_membar_consumer) STRONG_ALIAS(_membar_producer,_membar_consumer)
ATOMIC_OP_ALIAS(membar_consumer,_membar_consumer) ATOMIC_OP_ALIAS(membar_consumer,_membar_consumer)
ATOMIC_OP_ALIAS(membar_enter,_membar_consumer) ATOMIC_OP_ALIAS(membar_enter,_membar_sync)
STRONG_ALIAS(_membar_enter,_membar_consumer) STRONG_ALIAS(_membar_enter,_membar_sync)
ATOMIC_OP_ALIAS(membar_exit,_membar_consumer) ATOMIC_OP_ALIAS(membar_exit,_membar_consumer)
STRONG_ALIAS(_membar_exit,_membar_consumer) STRONG_ALIAS(_membar_exit,_membar_consumer)
ATOMIC_OP_ALIAS(membar_sync,_membar_sync) ATOMIC_OP_ALIAS(membar_sync,_membar_sync)