beautify nr_free_pages()

From: William Lee Irwin III (wli@holomorphy.com)
Date: Sat Jun 15 2002 - 14:23:57 EST


nr_free_pages() is overly verbose. The following is perhaps clearer and
gets to the point with fewer lines of code and inside of 80 columns.

Against 2.5.21

Cheers,
Bill

===== mm/page_alloc.c 1.67 vs edited =====
--- 1.67/mm/page_alloc.c Mon Jun 3 08:25:10 2002
+++ edited/mm/page_alloc.c Sat Jun 15 12:10:41 2002
@@ -495,16 +495,13 @@
  */
 unsigned int nr_free_pages(void)
 {
- unsigned int sum;
- zone_t *zone;
- pg_data_t *pgdat = pgdat_list;
+ unsigned int i, sum = 0;
+ pg_data_t *pgdat;
+
+ for (pgdat = pgdat_list; pgdat; pgdat = pgdat->node_next)
+ for (i = 0; i < MAX_NR_ZONES; ++i)
+ sum += pgdat->node_zones[i].free_pages;
 
- sum = 0;
- while (pgdat) {
- for (zone = pgdat->node_zones; zone < pgdat->node_zones + MAX_NR_ZONES; zone++)
- sum += zone->free_pages;
- pgdat = pgdat->node_next;
- }
         return sum;
 }
 
-
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