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 369c3df8a00e68d63e4b40c71ded479b730d8f6f..3b885bd469bcd17a642d528e0e09a7da309c2450 100644 (file)
--- 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);
         }