#define __HAVE_ATOMIC_AS_MEMBAR, indicating that:
- atomic_cas_ni() does an implicit membar_exit() - all other atomic operations do an implicit membar_sync() While this might seem kind of arbitrary it's the basis for some important optimizations.
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@ -1,4 +1,4 @@
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/* $NetBSD: types.h,v 1.25 2008/01/20 18:09:04 joerg Exp $ */
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/* $NetBSD: types.h,v 1.26 2008/02/21 16:31:13 ad Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -72,6 +72,7 @@ typedef volatile unsigned char __cpu_simple_lock_t;
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#define __HAVE_SYSCALL_INTERN
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#define __HAVE_MINIMAL_EMUL
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#define __HAVE_ATOMIC64_OPS
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#define __HAVE_ATOMIC_AS_MEMBAR
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#ifdef _KERNEL_OPT
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#include "opt_xen.h"
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/* $NetBSD: types.h,v 1.58 2008/01/23 19:46:44 bouyer Exp $ */
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/* $NetBSD: types.h,v 1.59 2008/02/21 16:31:13 ad Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -82,6 +82,7 @@ typedef volatile unsigned char __cpu_simple_lock_t;
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#define __HAVE_MINIMAL_EMUL
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#define __HAVE_OLD_DISKLABEL
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#define __HAVE_ATOMIC64_OPS
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#define __HAVE_ATOMIC_AS_MEMBAR
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#if defined(_KERNEL)
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#define __HAVE_RAS
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