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