page allocator ZONE_HIGHMEM fixups
1. We do not need to do an #ifdef in si_meminfo since both counters
in use are zero if !CONFIG_HIGHMEM.
2. Add #ifdef in si_meminfo_node instead to avoid referencing zone
information for ZONE_HIGHMEM if we do not have HIGHMEM
(may not be there after the following patches).
3. Replace the use of ZONE_HIGHMEM with MAX_NR_ZONES in build_zonelists_node
4. build_zonelists_node: Remove BUG_ON for ZONE_HIGHMEM. Zone will
be optional soon and thus BUG_ON cannot be triggered anymore.
5. init_free_area_core: Replace a use of ZONE_HIGHMEM with NR_MAX_ZONES.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.17-mm6/mm/page_alloc.c
===================================================================
--- linux-2.6.17-mm6.orig/mm/page_alloc.c 2006-07-05 20:49:58.340089640 -0700
+++ linux-2.6.17-mm6/mm/page_alloc.c 2006-07-07 15:07:41.676482357 -0700
@@ -1289,13 +1289,8 @@ void si_meminfo(struct sysinfo *val)
val->sharedram = 0;
val->freeram = nr_free_pages();
val->bufferram = nr_blockdev_pages();
-#ifdef CONFIG_HIGHMEM
val->totalhigh = totalhigh_pages;
val->freehigh = nr_free_highpages();
-#else
- val->totalhigh = 0;
- val->freehigh = 0;
-#endif
val->mem_unit = PAGE_SIZE;
}
@@ -1308,8 +1303,13 @@ void si_meminfo_node(struct sysinfo *val
val->totalram = pgdat->node_present_pages;
val->freeram = nr_free_pages_pgdat(pgdat);
+#ifdef CONFIG_HIGHMEM
val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].present_pages;
val->freehigh = pgdat->node_zones[ZONE_HIGHMEM].free_pages;
+#else
+ val->totalhigh = 0;
+ val->freehigh = 0;
+#endif
val->mem_unit = PAGE_SIZE;
}
#endif
@@ -1442,14 +1442,11 @@ static int __meminit build_zonelists_nod
{
struct zone *zone;
- BUG_ON(zone_type > ZONE_HIGHMEM);
+ BUG_ON(zone_type >= MAX_NR_ZONES);
do {
zone = pgdat->node_zones + zone_type;
if (populated_zone(zone)) {
-#ifndef CONFIG_HIGHMEM
- BUG_ON(zone_type > ZONE_NORMAL);
-#endif
zonelist->zones[nr_zones++] = zone;
check_highest_zone(zone_type);
}
@@ -2080,7 +2077,7 @@ static void __meminit free_area_init_cor
if (zholes_size)
realsize -= zholes_size[j];
- if (j < ZONE_HIGHMEM)
+ if (!is_highmem_idx(j))
nr_kernel_pages += realsize;
nr_all_pages += realsize;
-
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