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rcu_queue: remove barrier from QLIST_EMPTY_RCU

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It's unnecessary because the pointer isn't dereferenced.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20180819091335.22863-3-cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Emilio G. Cota 2018-08-19 05:13:26 -04:00 committed by Paolo Bonzini
parent c177e0bf06
commit 735d1af662
1 changed files with 1 additions and 1 deletions
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2
include/qemu/rcu_queue.h
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@ -36,7 +36,7 @@ extern "C" {
/*
* List access methods.
*/
#define QLIST_EMPTY_RCU(head) (atomic_rcu_read(&(head)->lh_first) == NULL)
#define QLIST_EMPTY_RCU(head) (atomic_read(&(head)->lh_first) == NULL)
#define QLIST_FIRST_RCU(head) (atomic_rcu_read(&(head)->lh_first))
#define QLIST_NEXT_RCU(elm, field) (atomic_rcu_read(&(elm)->field.le_next))