[PATCH] mm: wider use of for_each_*cpu()

In 'mm' change the explicit use of a for-loop using NR_CPUS into the
general for_each_cpu() constructs.  This widens the scope of potential
future optimizations of the general constructs, as well as takes advantage
of the existing optimizations of first_cpu() and next_cpu(), which is
advantageous when the true CPU count is much smaller than NR_CPUS.

Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 183abf39b445dcbc73579ea873b5900d062c872c..2dbdd98426fd46f9270d45acb081b7554df1740d 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1331,12 +1331,9 @@ void show_free_areas(void)
                } else
                        printk("\n");
 
-               for (cpu = 0; cpu < NR_CPUS; ++cpu) {
+               for_each_cpu(cpu) {
                        struct per_cpu_pageset *pageset;
 
-                       if (!cpu_possible(cpu))
-                               continue;
-
                        pageset = zone_pcp(zone, cpu);
 
                        for (temperature = 0; temperature < 2; temperature++)