zonelists: handle a node zonelist with no applicable entries

[safe/jmp/linux-2.6] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0353002..7f4c66f 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1396,6 +1396,9 @@ get_page_from_freelist(gfp_t gfp_mask, nodemask_t *nodemask, unsigned int order,
 
        (void)first_zones_zonelist(zonelist, high_zoneidx, nodemask,
                                                        &preferred_zone);
+       if (!preferred_zone)
+               return NULL;
+
        classzone_idx = zone_idx(preferred_zone);
 
 zonelist_scan: