于 6/17/2010 3:51 PM, Jan Pogadl 写道:
On Thursday 17 June 2010 05:24:14 Alex Chiang wrote:
with commit commit 5d554a7bb0643a6151a84319bfeba8270bf5269e (ACPI: processor:
add internal processor_physically_present()) a new function got introduced which
always fails on machines with CONFIG_SMP disabled. Thus _PDC will never be
initialized? set?.
Does this patch fix it?
works great
thanks
---
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 5128435..bcf0cf8 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -223,7 +223,7 @@ static bool processor_physically_present(acpi_handle handle)
type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
cpuid = acpi_get_cpuid(handle, type, acpi_id);
- if (cpuid == -1)
+ if ((cpuid == -1)&& (num_online_cpus()> 1))
return false;
return true;
I have a puzzle why num_online_cpus is used here, instead of
num_possible_cpus. It will be possible under a hotplug scenario.
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