cpufreq: ACPI: Simplify MSR read on the boot CPU

Replace the 32-bit MSR access function with a 64-bit variant to simplify
the call site, eliminating unnecessary 32-bit value manipulations.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Link: https://patch.msgid.link/20241106182313.165297-1-chang.seok.bae@intel.com
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 433eb597c2b80fbcb2a2cb105e8521a07d504665..c9ebacf5c88e2448cbe952da1946d4ec941a5b1c 100644 (file)
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -73,20 +73,17 @@ static unsigned int acpi_pstate_strict;
 
 static bool boost_state(unsigned int cpu)
 {
-       u32 lo, hi;
        u64 msr;
 
        switch (boot_cpu_data.x86_vendor) {
        case X86_VENDOR_INTEL:
        case X86_VENDOR_CENTAUR:
        case X86_VENDOR_ZHAOXIN:
-               rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi);
-               msr = lo | ((u64)hi << 32);
+               rdmsrl_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &msr);
                return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE);
        case X86_VENDOR_HYGON:
        case X86_VENDOR_AMD:
-               rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
-               msr = lo | ((u64)hi << 32);
+               rdmsrl_on_cpu(cpu, MSR_K7_HWCR, &msr);
                return !(msr & MSR_K7_HWCR_CPB_DIS);
        }
        return false;