From: John Hawkes <hawkes@sgi.com>
Date: Sun, 30 Oct 2005 01:17:01 +0000 (-0700)
Subject: [PATCH] mm: wider use of for_each_*cpu()
X-Git-Tag: v2.6.15-rc1~730^2^2~2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f96996de0eda378df2a5f857ee1ef615ae10a4f;p=linux-2.6

[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 183abf39b4..2dbdd98426 100644
--- 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++)