From: Feifei Wang <feifei.wang2@arm.com>
Date: Wed, 20 Oct 2021 03:03:35 +0000 (+0800)
Subject: mcslock: use WFE in lock for aarch64
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c4629b02c51f91f4aa66f07893efb362b5399f10;p=dpdk.git

mcslock: use WFE in lock for aarch64

Instead of polling for previous lock holder unlocking, use
wait_until_equal API.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---

diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h
index 9f323bd2a2..34f33c64a5 100644
--- a/lib/eal/include/generic/rte_mcslock.h
+++ b/lib/eal/include/generic/rte_mcslock.h
@@ -84,8 +84,7 @@ rte_mcslock_lock(rte_mcslock_t **msl, rte_mcslock_t *me)
 	 * to spin on me->locked until the previous lock holder resets
 	 * the me->locked using mcslock_unlock().
 	 */
-	while (__atomic_load_n(&me->locked, __ATOMIC_ACQUIRE))
-		rte_pause();
+	rte_wait_until_equal_32((uint32_t *)&me->locked, 0, __ATOMIC_ACQUIRE);
 }
 
 /**