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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-12-03 13:49:39 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-12-03 13:49:39 +0100 |
| commit | 220d0b1dbf78c6417a658c96e571415552d3abac (patch) | |
| tree | 70cd3862540c38ea490e7a27c3c7acc35b680234 /arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | |
| parent | 474b18ccc264c472abeec50f48469b6477202699 (diff) | |
| parent | 22763c5cf3690a681551162c15d34d935308c8d7 (diff) | |
| download | kernel_samsung_espresso10-220d0b1dbf78c6417a658c96e571415552d3abac.zip kernel_samsung_espresso10-220d0b1dbf78c6417a658c96e571415552d3abac.tar.gz kernel_samsung_espresso10-220d0b1dbf78c6417a658c96e571415552d3abac.tar.bz2 | |
Merge branch 'master' into for-2.6.33
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c')
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c index 7d5c3b0..8b581d3 100644 --- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c +++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c @@ -526,15 +526,21 @@ static const struct dmi_system_id sw_any_bug_dmi_table[] = { static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) { - /* http://www.intel.com/Assets/PDF/specupdate/314554.pdf + /* Intel Xeon Processor 7100 Series Specification Update + * http://www.intel.com/Assets/PDF/specupdate/314554.pdf * AL30: A Machine Check Exception (MCE) Occurring during an * Enhanced Intel SpeedStep Technology Ratio Change May Cause - * Both Processor Cores to Lock Up when HT is enabled*/ + * Both Processor Cores to Lock Up. */ if (c->x86_vendor == X86_VENDOR_INTEL) { if ((c->x86 == 15) && (c->x86_model == 6) && - (c->x86_mask == 8) && smt_capable()) + (c->x86_mask == 8)) { + printk(KERN_INFO "acpi-cpufreq: Intel(R) " + "Xeon(R) 7100 Errata AL30, processors may " + "lock up on frequency changes: disabling " + "acpi-cpufreq.\n"); return -ENODEV; + } } return 0; } @@ -549,13 +555,18 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) unsigned int result = 0; struct cpuinfo_x86 *c = &cpu_data(policy->cpu); struct acpi_processor_performance *perf; +#ifdef CONFIG_SMP + static int blacklisted; +#endif dprintk("acpi_cpufreq_cpu_init\n"); #ifdef CONFIG_SMP - result = acpi_cpufreq_blacklist(c); - if (result) - return result; + if (blacklisted) + return blacklisted; + blacklisted = acpi_cpufreq_blacklist(c); + if (blacklisted) + return blacklisted; #endif data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL); |