Commit b848e0a0 authored Mar 28, 2006 by KAMEZAWA Hiroyuki Committed by Paul Mackerras Mar 29, 2006

[PATCH] for_each_possible_cpu: ppc



for_each_cpu() actually iterates across all possible CPUs.  We've had mistakes
in the past where people were using for_each_cpu() where they should have been
iterating across only online or present CPUs.  This is inefficient and
possibly buggy.

We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the
future.

This patch replaces for_each_cpu with for_each_possible_cpu.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent 0e551954

arch/ppc/kernel/setup.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -474,7 +474,7 @@ int __init ppc_init(void)
		if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);

		/* register CPU devices */
		for_each_cpu(i)
		for_each_possible_cpu(i)
		register_cpu(&cpu_devices[i], i, NULL);

		/* call platform init */

arch/ppc/kernel/smp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -311,7 +311,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
		/* Backup CPU 0 state */
		__save_cpu_setup();

		for_each_cpu(cpu) {
		for_each_possible_cpu(cpu) {
		if (cpu == smp_processor_id())
		continue;
		/* create a process for the processor */