From e274a49ffdcc1db0b2db471a4b765e56662c2cb6 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Sat, 17 Feb 2018 19:28:09 +0100
Subject: [PATCH] Fix bug as we can't fail spuriously here.

---
 m-snapshot.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m-snapshot.h b/m-snapshot.h
index dbdc8deb..548b1480 100644
--- a/m-snapshot.h
+++ b/m-snapshot.h
@@ -374,7 +374,7 @@ static inline unsigned int snapshot_mrsw_int_read_start(snapshot_mrsw_int_t s)
     unsigned int c = atomic_fetch_add(&s->cptTab[idx], 1);
     assert (c <= s->n + 1);
     // Try to ack it
-    if (atomic_compare_exchange_weak(&s->lastNext, &previous, newNext))
+    if (atomic_compare_exchange_strong(&s->lastNext, &previous, newNext))
       break;
     // If we have been preempted by another read thread
     if (idx == SNAPSHOTI_MRSW_INT_FLAG_W(previous)) {