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x86/cpu: Remove unnecessary MwAIT leaf checks

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The CPUID leaf dependency checker will remove X86_FEATURE_MWAIT if
the CPUID level is below the required level (CPUID_MWAIT_LEAF).
Thus, if you check X86_FEATURE_MWAIT you do not need to also
check the CPUID level.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20241213205030.9B42B458%40davehans-spike.ostc.intel.com
This commit is contained in:
Dave Hansen
2024-12-13 12:50:30 -08:00
parent 8bd6821c9c
commit 262fba5570
4 changed files with 0 additions and 10 deletions
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3
drivers/idle/intel_idle.c
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@@ -2317,9 +2317,6 @@ static int __init intel_idle_init(void)
return -ENODEV;
}
if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF)
return -ENODEV;
cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates);
if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||