swap_prefetch: Make use of ZONE_HIGHMEM conditional
swap prefetch uses ZONE_HIGHMEM even if CONFIG_HIGHMEM is off. Make
that use conditional.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.17/mm/swap_prefetch.c
===================================================================
--- linux-2.6.17.orig/mm/swap_prefetch.c 2006-07-03 13:11:06.000000000 -0700
+++ linux-2.6.17/mm/swap_prefetch.c 2006-07-03 13:12:08.000000000 -0700
@@ -277,8 +277,10 @@
ns = &sp_stat.node[z->zone_pgdat->node_id];
idx = zone_idx(z);
- ns->lowfree[idx] = z->pages_high * 3 +
- z->lowmem_reserve[ZONE_HIGHMEM];
+ ns->lowfree[idx] = z->pages_high * 3;
+#ifdef CONFIG_HIGHMEM
+ ns->lowfree[idx] += z->lowmem_reserve[ZONE_HIGHMEM];
+#endif
ns->highfree[idx] = ns->lowfree[idx] + z->pages_high;
if (z->free_pages > ns->highfree[idx]) {
-
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