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| author | Dave Jones <davej@redhat.com> | 2005-07-28 09:38:21 -0700 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2005-07-28 09:38:21 -0700 |
| commit | 03938c3f1062b0f279a0ef937a471d4db83702ed (patch) | |
| tree | 12e7a40b6f6232d6ddd7b5bd475fe29722cd8f10 /arch/i386 | |
| parent | 8ed693d29b25bbd88471ec043cc01581419d0481 (diff) | |
| download | kernel_samsung_espresso10-03938c3f1062b0f279a0ef937a471d4db83702ed.zip kernel_samsung_espresso10-03938c3f1062b0f279a0ef937a471d4db83702ed.tar.gz kernel_samsung_espresso10-03938c3f1062b0f279a0ef937a471d4db83702ed.tar.bz2 | |
powernow-k8 requires that a data structure for
each core be created in the _cpu_init function
call. The cpufreq infrastructure doesn't call
_cpu_init for the second core in each processor.
Some systems crashed when _get was called with
an odd-numbered core because it tried to
dereference a NULL pointer since the data
structure had not been created.
The attached patch solves the problem by
initializing data structures for all shared
cores in the _cpu_init function. It should
apply to 2.6.12-rc6 and has been tested by
AMD and Sun.
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 10cc096..9cf7b67b 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -44,7 +44,7 @@ #define PFX "powernow-k8: " #define BFX PFX "BIOS error: " -#define VERSION "version 1.40.2" +#define VERSION "version 1.40.4" #include "powernow-k8.h" /* serialize freq changes */ @@ -978,7 +978,7 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol) { struct powernow_k8_data *data; cpumask_t oldmask = CPU_MASK_ALL; - int rc; + int rc, i; if (!check_supported_cpu(pol->cpu)) return -ENODEV; @@ -1064,7 +1064,9 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol) printk("cpu_init done, current fid 0x%x, vid 0x%x\n", 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; |