[RFC][PATCH 3/4] build_zonelists() unification: don't re-zero zonelist

[Dave Hansen]

The pgdats, and thus the zonelists are either statically
allocated in BSS, cleared by the bootmem allocator, or
cleared by arch code such as remapped_pgdat_init(). There
is no need to re-zero them here

Signed-off-by: Dave Hansen <haveblue@xxxxxxxxxx>
---

 memhotplug-dave/mm/page_alloc.c |    6 ------
 1 files changed, 6 deletions(-)

diff -puN mm/page_alloc.c~B1.2-build_zonelists_unification mm/page_alloc.c
--- memhotplug/mm/page_alloc.c~B1.2-build_zonelists_unification	2005-09-14 09:32:38.000000000 -0700
+++ memhotplug-dave/mm/page_alloc.c	2005-09-14 09:32:38.000000000 -0700
@@ -1549,12 +1549,6 @@ static void __init build_zonelists(pg_da
 	struct zonelist *zonelist;
 	nodemask_t used_mask;
 
-	/* initialize zonelists */
-	for (i = 0; i < GFP_ZONETYPES; i++) {
-		zonelist = pgdat->node_zonelists + i;
-		zonelist->zones[0] = NULL;
-	}
-
 	/* NUMA-aware ordering of nodes */
 	local_node = pgdat->node_id;
 	load = num_online_nodes();
_
-
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