[src/trunk]: src/sys/external/bsd/common/include/asm linux: Eliminate read_ba...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/040414bf5b2c
branches:  trunk
changeset: 1028893:040414bf5b2c
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 12:25:11 2021 +0000

description:
linux: Eliminate read_barrier_depends, smp_read_barrier_depends.

These no longer exist in Linux; instead, Linux now uses READ_ONCE.

diffstat:

 sys/external/bsd/common/include/asm/barrier.h |  10 +---------
 1 files changed, 1 insertions(+), 9 deletions(-)

diffs (32 lines):

diff -r 9d3687644cf2 -r 040414bf5b2c sys/external/bsd/common/include/asm/barrier.h
--- a/sys/external/bsd/common/include/asm/barrier.h     Sun Dec 19 12:25:05 2021 +0000
+++ b/sys/external/bsd/common/include/asm/barrier.h     Sun Dec 19 12:25:11 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: barrier.h,v 1.9 2021/12/19 12:25:05 riastradh Exp $    */
+/*     $NetBSD: barrier.h,v 1.10 2021/12/19 12:25:11 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -57,22 +57,14 @@
 #define        rmb     membar_consumer
 #endif
 
-#ifdef __alpha__               /* XXX As if...  */
-#  define      read_barrier_depends    membar_sync
-#else
-#  define      read_barrier_depends()  do {} while (0)
-#endif
-
 #ifdef MULTIPROCESSOR
 #  define      smp_mb                          membar_sync
 #  define      smp_wmb                         membar_producer
 #  define      smp_rmb                         membar_consumer
-#  define      smp_read_barrier_depends        read_barrier_depends
 #else
 #  define      smp_mb()                        do {} while (0)
 #  define      smp_wmb()                       do {} while (0)
 #  define      smp_rmb()                       do {} while (0)
-#  define      smp_read_barrier_depends()      do {} while (0)
 #endif
 
 #if defined(MULTIPROCESSOR) && !defined(__HAVE_ATOMIC_AS_MEMBAR)