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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-16 22:59:33 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-16 22:59:33 +0200
commit09c87e2f79eb336bd313090be8113ae29345b8f5 (patch)
treea5caa91864fcac4343abd09c9d59fe27cf305682 /drivers
parent52e0a509e5d6f902ec26bc2a8bb02b137dc453be (diff)
downloadleg-kernel-09c87e2f79eb336bd313090be8113ae29345b8f5.tar.gz
intel_pstate: Fix type mismatch warning
The expression in line 398 of intel_pstate.c causes the following warning to be emitted: drivers/cpufreq/intel_pstate.c:398:3: warning: left shift count >= width of type which happens because unsigned long is 32-bit on some architectures. Fix that by using a helper u64 variable and simplify the code slightly. Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/cpufreq/intel_pstate.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 28fefe3dd731..badf6206b2b2 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -383,6 +383,7 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
{
int max_perf, min_perf;
+ u64 val;
intel_pstate_get_min_max(cpu, &min_perf, &max_perf);
@@ -394,11 +395,11 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
trace_cpu_frequency(pstate * 100000, cpu->cpu);
cpu->pstate.current_pstate = pstate;
+ val = pstate << 8;
if (limits.no_turbo)
- wrmsrl(MSR_IA32_PERF_CTL, BIT(32) | (pstate << 8));
- else
- wrmsrl(MSR_IA32_PERF_CTL, pstate << 8);
+ val |= (u64)1 << 32;
+ wrmsrl(MSR_IA32_PERF_CTL, val);
}
static inline void intel_pstate_pstate_increase(struct cpudata *cpu, int steps)