diff --git a/drivers/xen/mcelog.c b/drivers/xen/mcelog.c
index 4f65b641c054..abe658c73b7b 100644
--- a/drivers/xen/mcelog.c
+++ b/drivers/xen/mcelog.c
@@ -165,9 +165,7 @@ static long xen_mce_chrdev_ioctl(struct file *f, unsigned int cmd,
 	case MCE_GETCLEAR_FLAGS: {
 		unsigned flags;
 
-		do {
-			flags = xen_mcelog.flags;
-		} while (cmpxchg(&xen_mcelog.flags, flags, 0) != flags);
+		flags = xchg(&xen_mcelog.flags, 0);
 
 		return put_user(flags, p);
 	}