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authorAndrew Morton <akpm@osdl.org>2006-03-23 03:01:05 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-23 07:38:17 -0800
commit394e3902c55e667945f6f1c2bdbc59842cce70f7 (patch)
treef4bca0bdc0c291fda6f6949265aacec0669b9084 /arch/parisc/kernel/smp.c
parent63872f87a151413100678f110d1556026002809e (diff)
downloadop-kernel-dev-394e3902c55e667945f6f1c2bdbc59842cce70f7.zip
op-kernel-dev-394e3902c55e667945f6f1c2bdbc59842cce70f7.tar.gz
[PATCH] more for_each_cpu() conversions
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>
Diffstat (limited to 'arch/parisc/kernel/smp.c')
-rw-r--r--arch/parisc/kernel/smp.c25
1 files changed, 10 insertions, 15 deletions
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 25564b7..d6ac1c6 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -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:
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