diff mbox series

[v9,3/5] mcslock: use wait until scheme for mcslock

Message ID 20211101060007.2632418-4-feifei.wang2@arm.com (mailing list archive)
State Accepted, archived
Delegated to: David Marchand
Headers
Series add new helper for wait scheme |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Feifei Wang Nov. 1, 2021, 6 a.m. UTC 
  Instead of polling for mcslock to be updated, 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>
---
 lib/eal/include/generic/rte_mcslock.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h
index 34f33c64a5..753836d23c 100644
--- a/lib/eal/include/generic/rte_mcslock.h
+++ b/lib/eal/include/generic/rte_mcslock.h
@@ -116,8 +116,9 @@  rte_mcslock_unlock(rte_mcslock_t **msl, rte_mcslock_t *me)
 		/* More nodes added to the queue by other CPUs.
 		 * Wait until the next pointer is set.
 		 */
-		while (__atomic_load_n(&me->next, __ATOMIC_RELAXED) == NULL)
-			rte_pause();
+		uintptr_t *next;
+		next = (uintptr_t *)&me->next;
+		RTE_WAIT_UNTIL_MASKED(next, UINTPTR_MAX, !=, 0, __ATOMIC_RELAXED);
 	}
 
 	/* Pass lock to next waiter. */