[PATCH] reduce MAX_NR_ZONES: move HIGHMEM counters into highmem.c/.h

Move totalhigh_pages and nr_free_highpages() into highmem.c/.h

Move the totalhigh_pages definition into highmem.c/.h.  Move the
nr_free_highpages function into highmem.c

[yoichi_yuasa@tripeaks.co.jp: build fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/mm/highmem.c b/mm/highmem.c
index 9b2a5403c447..ee5519b176ee 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -46,6 +46,19 @@ static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
  */
 #ifdef CONFIG_HIGHMEM
 
+unsigned long totalhigh_pages __read_mostly;
+
+unsigned int nr_free_highpages (void)
+{
+        pg_data_t *pgdat;
+        unsigned int pages = 0;
+
+        for_each_online_pgdat(pgdat)
+                pages += pgdat->node_zones[ZONE_HIGHMEM].free_pages;
+
+        return pages;
+}
+
 static int pkmap_count[LAST_PKMAP];
 static unsigned int last_pkmap_nr;
 static  __cacheline_aligned_in_smp DEFINE_SPINLOCK(kmap_lock);