Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / xen / xen-acpi-processor.c

diff --git a/kernel/drivers/xen/xen-acpi-processor.c b/kernel/drivers/xen/xen-acpi-processor.c
index 70fa438..611f9c1 100644 (file)
--- a/kernel/drivers/xen/xen-acpi-processor.c
+++ b/kernel/drivers/xen/xen-acpi-processor.c
@@ -423,36 +423,7 @@ upload:
 
        return 0;
 }
-static int __init check_prereq(void)
-{
-       struct cpuinfo_x86 *c = &cpu_data(0);
-
-       if (!xen_initial_domain())
-               return -ENODEV;
-
-       if (!acpi_gbl_FADT.smi_command)
-               return -ENODEV;
-
-       if (c->x86_vendor == X86_VENDOR_INTEL) {
-               if (!cpu_has(c, X86_FEATURE_EST))
-                       return -ENODEV;
 
-               return 0;
-       }
-       if (c->x86_vendor == X86_VENDOR_AMD) {
-               /* Copied from powernow-k8.h, can't include ../cpufreq/powernow
-                * as we get compile warnings for the static functions.
-                */
-#define CPUID_FREQ_VOLT_CAPABILITIES    0x80000007
-#define USE_HW_PSTATE                   0x00000080
-               u32 eax, ebx, ecx, edx;
-               cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
-               if ((edx & USE_HW_PSTATE) != USE_HW_PSTATE)
-                       return -ENODEV;
-               return 0;
-       }
-       return -ENODEV;
-}
 /* acpi_perf_data is a pointer to percpu data. */
 static struct acpi_processor_performance __percpu *acpi_perf_data;
 
@@ -509,10 +480,10 @@ struct notifier_block xen_acpi_processor_resume_nb = {
 static int __init xen_acpi_processor_init(void)
 {
        unsigned int i;
-       int rc = check_prereq();
+       int rc;
 
-       if (rc)
-               return rc;
+       if (!xen_initial_domain())
+               return -ENODEV;
 
        nr_acpi_bits = get_max_acpi_id() + 1;
        acpi_ids_done = kcalloc(BITS_TO_LONGS(nr_acpi_bits), sizeof(unsigned long), GFP_KERNEL);