From 2f6726e54a9410e2e4cee864947c05e954051916 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Mon, 25 Sep 2006 23:31:18 -0700 Subject: [PATCH] Apply type enum zone_type After we have done this we can now do some typing cleanup. The memory policy layer keeps a policy_zone that specifies the zone that gets memory policies applied. This variable can now be of type enum zone_type. The check_highest_zone function and the build_zonelists funnctionm must then also take a enum zone_type parameter. Plus there are a number of loops over zones that also should use zone_type. We run into some troubles at some points with functions that need a zone_type variable to become -1. Fix that up. [pj@sgi.com: fix set_mempolicy() crash] Signed-off-by: Christoph Lameter Signed-off-by: Paul Jackson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 27 +++++++++++++++++---------- 1 file changed, 17 insertions(+), 10 deletions(-) (limited to 'mm/page_alloc.c') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 25f39865e32..9c44b9a39d3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -637,7 +637,8 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, */ void drain_node_pages(int nodeid) { - int i, z; + int i; + enum zone_type z; unsigned long flags; for (z = 0; z < MAX_NR_ZONES; z++) { @@ -1158,7 +1159,8 @@ EXPORT_SYMBOL(nr_free_pages); #ifdef CONFIG_NUMA unsigned int nr_free_pages_pgdat(pg_data_t *pgdat) { - unsigned int i, sum = 0; + unsigned int sum = 0; + enum zone_type i; for (i = 0; i < MAX_NR_ZONES; i++) sum += pgdat->node_zones[i].free_pages; @@ -1358,21 +1360,22 @@ void show_free_areas(void) * Add all populated zones of a node to the zonelist. */ static int __meminit build_zonelists_node(pg_data_t *pgdat, - struct zonelist *zonelist, int nr_zones, int zone_type) + struct zonelist *zonelist, int nr_zones, enum zone_type zone_type) { struct zone *zone; BUG_ON(zone_type >= MAX_NR_ZONES); + zone_type++; do { + zone_type--; zone = pgdat->node_zones + zone_type; if (populated_zone(zone)) { zonelist->zones[nr_zones++] = zone; check_highest_zone(zone_type); } - zone_type--; - } while (zone_type >= 0); + } while (zone_type); return nr_zones; } @@ -1441,10 +1444,11 @@ static int __meminit find_next_best_node(int node, nodemask_t *used_node_mask) static void __meminit build_zonelists(pg_data_t *pgdat) { - int i, j, k, node, local_node; + int i, j, node, local_node; int prev_node, load; struct zonelist *zonelist; nodemask_t used_mask; + enum zone_type k; /* initialize zonelists */ for (i = 0; i < GFP_ZONETYPES; i++) { @@ -1628,7 +1632,7 @@ static void __init calculate_zone_totalpages(struct pglist_data *pgdat, unsigned long *zones_size, unsigned long *zholes_size) { unsigned long realtotalpages, totalpages = 0; - int i; + enum zone_type i; for (i = 0; i < MAX_NR_ZONES; i++) totalpages += zones_size[i]; @@ -2116,7 +2120,7 @@ static void calculate_totalreserve_pages(void) { struct pglist_data *pgdat; unsigned long reserve_pages = 0; - int i, j; + enum zone_type i, j; for_each_online_pgdat(pgdat) { for (i = 0; i < MAX_NR_ZONES; i++) { @@ -2149,7 +2153,7 @@ static void calculate_totalreserve_pages(void) static void setup_per_zone_lowmem_reserve(void) { struct pglist_data *pgdat; - int j, idx; + enum zone_type j, idx; for_each_online_pgdat(pgdat) { for (j = 0; j < MAX_NR_ZONES; j++) { @@ -2158,9 +2162,12 @@ static void setup_per_zone_lowmem_reserve(void) zone->lowmem_reserve[j] = 0; - for (idx = j-1; idx >= 0; idx--) { + idx = j; + while (idx) { struct zone *lower_zone; + idx--; + if (sysctl_lowmem_reserve_ratio[idx] < 1) sysctl_lowmem_reserve_ratio[idx] = 1; -- cgit v1.2.3