Signed-off-by: Paolo Bonzini <[email protected]>
---
Not a correctness issue, and it will just save a syscall in
rare cases. Can be committed separately, or squashed in patch 8
(that would be my favorite option), or left out altogether.
urcu-call-rcu-impl.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/urcu-call-rcu-impl.h b/urcu-call-rcu-impl.h
index 165956e..c45928a 100644
--- a/urcu-call-rcu-impl.h
+++ b/urcu-call-rcu-impl.h
@@ -214,6 +214,9 @@ static void *call_rcu_thread(void *arg)
if (&crdp->cbs.head
== _CMM_LOAD_SHARED(crdp->cbs.tail))
break;
+ /* False alarm... another bunch is ready. */
+ cmm_smp_mb();
+ uatomic_or(&crdp->flags, URCU_CALL_RCU_BUSY);
}
while ((cbs = _CMM_LOAD_SHARED(crdp->cbs.head)) == NULL)
poll(NULL, 0, 1);
--
1.7.4.4
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