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[PATCH] x86_64: Initialize powernow_data[] for all siblings 

I got an oops on a dual core system because the lost tick handler
called cpufreq_get() on core 1 and powernow tried to follow
a NULL powernow_data[] pointer there.

Initialize powernow_data for all cores of a CPU.

Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-03-25 16:31:52 +01:00 committed by Linus Torvalds
parent 0085979006
commit ad90573f93
1 changed files with 4 additions and 3 deletions
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7
arch/i386/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -54,7 +54,7 @@ static DECLARE_MUTEX(fidvid_sem);
static struct powernow_k8_data *powernow_data[NR_CPUS]; static struct powernow_k8_data *powernow_data[NR_CPUS];
#ifndef CONFIG_SMP #ifndef CONFIG_SMP
static cpumask_t cpu_core_map[1]; static cpumask_t cpu_core_map[1] = { CPU_MASK_ALL };
#endif #endif
/* Return a frequency in MHz, given an input fid */ /* Return a frequency in MHz, given an input fid */
@ -976,7 +976,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{ {
struct powernow_k8_data *data; struct powernow_k8_data *data;
cpumask_t oldmask = CPU_MASK_ALL; cpumask_t oldmask = CPU_MASK_ALL;
int rc; int rc, i;
if (!cpu_online(pol->cpu)) if (!cpu_online(pol->cpu))
return -ENODEV; return -ENODEV;
@ -1062,7 +1062,8 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
printk("cpu_init done, current fid 0x%x, vid 0x%x\n", printk("cpu_init done, current fid 0x%x, vid 0x%x\n",
data->currfid, data->currvid); data->currfid, data->currvid);
powernow_data[pol->cpu] = data; for_each_cpu_mask(i, cpu_core_map[pol->cpu])
powernow_data[i] = data;
return 0; return 0;