From: Feifei Wang <feifei.wang2@arm.com>
Date: Mon, 1 Nov 2021 06:00:04 +0000 (+0800)
Subject: pflock: use wait until scheme for read lock
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=41902d2468968a8c6acb96b48e84d726bb797c8a;p=dpdk.git

pflock: use wait until scheme for read lock

Instead of polling for read pflock update, use wait until scheme for
this case.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
---

diff --git a/lib/eal/include/generic/rte_pflock.h b/lib/eal/include/generic/rte_pflock.h
index e57c179ef2..b9de063c89 100644
--- a/lib/eal/include/generic/rte_pflock.h
+++ b/lib/eal/include/generic/rte_pflock.h
@@ -121,9 +121,8 @@ rte_pflock_read_lock(rte_pflock_t *pf)
 		return;
 
 	/* Wait for current write phase to complete. */
-	while ((__atomic_load_n(&pf->rd.in, __ATOMIC_ACQUIRE)
-		& RTE_PFLOCK_WBITS) == w)
-		rte_pause();
+	RTE_WAIT_UNTIL_MASKED(&pf->rd.in, RTE_PFLOCK_WBITS, !=, w,
+		__ATOMIC_ACQUIRE);
 }
 
 /**