Messages in this thread Patch in this message |  | | | From | Matthew Garrett <> | | Subject | [PATCH v4 5/7] cpufreq: Add compatibility hack to powernow-k8 | | Date | Mon, 18 Jul 2011 12:37:40 -0400 |
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cpufreq modules are often loaded from init scripts that assume that all recent AMD systems will use powernow-k8, so we should ensure that loading it triggers a load of acpi-cpufreq if the latter is built as a module. This avoids the problem of users ending up without any cpufreq support after the transition.
Signed-off-by: Matthew Garrett <mjg@redhat.com> --- drivers/cpufreq/powernow-k8.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index bce576d..8de4446 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -1549,8 +1549,12 @@ static int __cpuinit powernowk8_init(void) supported_cpus++; } - if (supported_cpus != num_online_cpus()) + if (supported_cpus != num_online_cpus()) { + if (static_cpu_has(X86_FEATURE_HW_PSTATE)) + request_module("acpi_cpufreq"); + return -ENODEV; + } printk(KERN_INFO PFX "Found %d %s (%d cpu cores) (" VERSION ")\n", num_online_nodes(), boot_cpu_data.x86_model_id, supported_cpus); -- 1.7.6
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