Commit 2f96996d authored Oct 29, 2005 by John Hawkes Committed by Linus Torvalds Oct 29, 2005

[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>

parent 5fcbb230

mm/page_alloc.c

+1 −4

Original line number	Original line	Diff line number	Diff line
	@@ -1331,12 +1331,9 @@ void show_free_areas(void)
	} else		} else
	printk("\n");		printk("\n");

	for (cpu = 0; cpu < NR_CPUS; ++cpu) {		for_each_cpu(cpu) {
	struct per_cpu_pageset *pageset;		struct per_cpu_pageset *pageset;

	if (!cpu_possible(cpu))
	continue;

	pageset = zone_pcp(zone, cpu);		pageset = zone_pcp(zone, cpu);

	for (temperature = 0; temperature < 2; temperature++)		for (temperature = 0; temperature < 2; temperature++)