From: Michael McConville <mmcco@mykolab.com>
Date: Fri, 1 Dec 2017 18:31:57 +0000 (-0700)
Subject: mmap(2) returns MAP_FAILED, not NULL, on failure
X-Git-Tag: qemu-xen-4.10.4~4
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=dc33057be1fc39b3fee2f67a7f2ac1379d150dab;p=qemu-xen.git

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>
(cherry picked from commit ab1ce9bd4897b9909836e2d50bca86f2f3f2dddc)
---

diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index 369c3df8a0..3b885bd469 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -198,7 +198,7 @@ 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);
         }