From ab1ce9bd4897b9909836e2d50bca86f2f3f2dddc Mon Sep 17 00:00:00 2001
From: Michael McConville <mmcco@mykolab.com>
Date: Fri, 1 Dec 2017 11:31:57 -0700
Subject: [PATCH] mmap(2) returns MAP_FAILED, not NULL, on failure

Signed-off-by: Michael McConville <mmcco@mykolab.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 hw/i386/xen/xen-mapcache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index baab93b614..efa35dc6e0 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -199,7 +199,7 @@ static void xen_remap_bucket(MapCacheEntry *entry,
          */
         vaddr_base = mmap(vaddr, size, PROT_READ | PROT_WRITE,
                           MAP_ANON | MAP_SHARED, -1, 0);
-        if (vaddr_base == NULL) {
+        if (vaddr_base == MAP_FAILED) {
             perror("mmap");
             exit(-1);
         }
-- 
2.11.0