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(parent: ac411e4) | patch
ARC: remove redundant READ_ONCE() in cmpxchg loop
authorBang Li <libang.linuxer@gmail.com>
Sat, 19 Mar 2022 02:03:16 +0000 (10:03 +0800)
committerVineet Gupta <vgupta@kernel.org>
Mon, 18 Apr 2022 21:47:05 +0000 (14:47 -0700)
commitc6ed4d84a2c49de7d6f490144cca7b4a4831fb6e
tree8bd44a9893de75dde44a568294e510ae4aef87abtree | snapshot
parentac411e41ec065daa867b5668b6e71ea1aff7b36acommit | diff
ARC: remove redundant READ_ONCE() in cmpxchg loop

This patch reverts commit 7082a29c22ac ("ARC: use ACCESS_ONCE in cmpxchg
loop").

It is not necessary to use READ_ONCE() because cmpxchg contains barrier. We
can get it from commit d57f727264f1 ("ARC: add compiler barrier to LLSC
based cmpxchg").

Signed-off-by: Bang Li <libang.linuxer@gmail.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
arch/arc/kernel/smp.c diff | blob | history
Domain: System / Kernel;