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cpufreq: intel_pstate: Fix an annoying !CONFIG_SMP warning 

I keep seeing

  drivers/cpufreq/intel_pstate.c: In function ‘intel_pstate_init’:
  drivers/cpufreq/intel_pstate.c:1187:26: warning: initialization from incompatible pointer type
    struct cpuinfo_x86 *c = &boot_cpu_data;

when doing randconfig builds.

This is caused by the fact that when !CONFIG_SMP, asm/processor.h
defines cpu_info to boot_cpu_data and the local variable

  struct cpu_defaults *cpu_info

overshadows it leading to this unfortunate assignment in the
preprocessed source:

 struct cpu_defaults *boot_cpu_data;
 struct cpuinfo_x86 *c = &boot_cpu_data;

Rename the local variable and use static_cpu_has_safe() which alleviates
the need for defining a local cpuinfo_x86 pointer.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Borislav Petkov 2015-04-03 15:19:53 +02:00 committed by Rafael J. Wysocki
parent 6a82ba6d4f
commit 64df1fdfcc
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/cpufreq/intel_pstate.c
View File

@ -31,6 +31,7 @@
#include <asm/div64.h>
#include <asm/msr.h>
#include <asm/cpu_device_id.h>
#include <asm/cpufeature.h>
#define BYT_RATIOS 0x66a
#define BYT_VIDS 0x66b
@ -1200,8 +1201,7 @@ static int __init intel_pstate_init(void)
{
int cpu, rc = 0;
const struct x86_cpu_id *id;
struct cpu_defaults *cpu_info;
struct cpuinfo_x86 *c = &boot_cpu_data;
struct cpu_defaults *cpu_def;
if (no_load)
return -ENODEV;
@ -1217,10 +1217,10 @@ static int __init intel_pstate_init(void)
if (intel_pstate_platform_pwr_mgmt_exists())
return -ENODEV;
cpu_info = (struct cpu_defaults *)id->driver_data;
cpu_def = (struct cpu_defaults *)id->driver_data;
copy_pid_params(&cpu_info->pid_policy);
copy_cpu_funcs(&cpu_info->funcs);
copy_pid_params(&cpu_def->pid_policy);
copy_cpu_funcs(&cpu_def->funcs);
if (intel_pstate_msrs_not_valid())
return -ENODEV;
@ -1231,7 +1231,7 @@ static int __init intel_pstate_init(void)
if (!all_cpu_data)
return -ENOMEM;
if (cpu_has(c,X86_FEATURE_HWP) && !no_hwp)
if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp)
intel_pstate_hwp_enable();
if (!hwp_active && hwp_only)