[Xen-devel] [PATCH] linux: small ACPI processor external control code adjustments

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

- don't send a change notification to Xen before having sent an init
  one
- fix a bogus preprocessor directive

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/arch/i386/kernel/acpi/processor_extcntl_xen.c
+++ b/arch/i386/kernel/acpi/processor_extcntl_xen.c
@@ -117,6 +117,8 @@ static int xen_px_notifier(struct acpi_p
 
        perf = &op.u.set_pminfo.u.perf;
        px = pr->performance;
+       if (!px)
+               return -EINVAL;
 
        switch(action) {
        case PROCESSOR_PM_CHANGE:
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -141,7 +141,7 @@ int acpi_processor_ppc_has_changed(struc
        else
 #ifdef CONFIG_CPU_FREQ
                return cpufreq_update_policy(pr->id);
-#elif CONFIG_PROCESSOR_EXTERNAL_CONTROL
+#elif defined(CONFIG_PROCESSOR_EXTERNAL_CONTROL)
                return processor_notify_external(pr,
                                PROCESSOR_PM_CHANGE, PM_TYPE_PERF);
 #endif




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