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authorAndrew Morton <akpm@osdl.org>2006-03-23 06:01:05 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-23 10:38:17 -0500
commit394e3902c55e667945f6f1c2bdbc59842cce70f7 (patch)
treef4bca0bdc0c291fda6f6949265aacec0669b9084 /arch/sh
parent63872f87a151413100678f110d1556026002809e (diff)
[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/sh')
-rw-r--r--arch/sh/kernel/irq.c5
-rw-r--r--arch/sh/kernel/setup.c5
2 files changed, 4 insertions, 6 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 6883c00728cb..b56e79632f24 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -35,9 +35,8 @@ int show_interrupts(struct seq_file *p, void *v)
35 35
36 if (i == 0) { 36 if (i == 0) {
37 seq_puts(p, " "); 37 seq_puts(p, " ");
38 for (j=0; j<NR_CPUS; j++) 38 for_each_online_cpu(j)
39 if (cpu_online(j)) 39 seq_printf(p, "CPU%d ",j);
40 seq_printf(p, "CPU%d ",j);
41 seq_putc(p, '\n'); 40 seq_putc(p, '\n');
42 } 41 }
43 42
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index a067a34e0b64..c0e79843f580 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -404,9 +404,8 @@ static int __init topology_init(void)
404{ 404{
405 int cpu_id; 405 int cpu_id;
406 406
407 for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++) 407 for_each_cpu(cpu_id)
408 if (cpu_possible(cpu_id)) 408 register_cpu(&cpu[cpu_id], cpu_id, NULL);
409 register_cpu(&cpu[cpu_id], cpu_id, NULL);
410 409
411 return 0; 410 return 0;
412} 411}