From 262fba55708b60a063b30d103963477dc5026f8c Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Fri, 13 Dec 2024 12:50:30 -0800 Subject: x86/cpu: Remove unnecessary MwAIT leaf checks 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 Link: https://lore.kernel.org/all/20241213205030.9B42B458%40davehans-spike.ostc.intel.com --- drivers/idle/intel_idle.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers/idle') diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 5d8ed1a68447..efa32d28ed93 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -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) || -- cgit v1.2.3