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 e57c179..b9de063 100644 (file)
--- 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);
 }
 
 /**