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[PATCH] more for_each_cpu() conversions

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When we stop allocating percpu memory for not-possible CPUs we must not touch
the percpu data for not-possible CPUs at all.  The correct way of doing this
is to test cpu_possible() or to use for_each_cpu().

This patch is a kernel-wide sweep of all instances of NR_CPUS.  I found very
few instances of this bug, if any.  But the patch converts lots of open-coded
test to use the preferred helper macros.

Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Christian Zankel <chris@zankel.net>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton
2006-03-23 03:01:05 -08:00
committed by Linus Torvalds
parent 63872f87a1
commit 394e3902c5
42 changed files with 137 additions and 222 deletions
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25
arch/parisc/kernel/smp.c
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@ -298,8 +298,8 @@ send_IPI_allbutself(enum ipi_message_type op)
{
int i;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i) && i != smp_processor_id())
for_each_online_cpu(i) {
if (i != smp_processor_id())
send_IPI_single(i, op);
}
}
@ -643,14 +643,13 @@ int sys_cpus(int argc, char **argv)
if ( argc == 1 ){
#ifdef DUMP_MORE_STATE
for(i=0; i<NR_CPUS; i++) {
for_each_online_cpu(i) {
int cpus_per_line = 4;
if(cpu_online(i)) {
if (j++ % cpus_per_line)
printk(" %3d",i);
else
printk("\n %3d",i);
}
if (j++ % cpus_per_line)
printk(" %3d",i);
else
printk("\n %3d",i);
}
printk("\n");
#else
@ -659,9 +658,7 @@ int sys_cpus(int argc, char **argv)
} else if((argc==2) && !(strcmp(argv[1],"-l"))) {
printk("\nCPUSTATE TASK CPUNUM CPUID HARDCPU(HPA)\n");
#ifdef DUMP_MORE_STATE
for(i=0;i<NR_CPUS;i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS:
@ -695,9 +692,7 @@ int sys_cpus(int argc, char **argv)
} else if ((argc==2) && !(strcmp(argv[1],"-s"))) {
#ifdef DUMP_MORE_STATE
printk("\nCPUSTATE CPUID\n");
for (i=0;i<NR_CPUS;i++) {
if (!cpu_online(i))
continue;
for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS: