default or selected kernelversion does not have config value CONFIG_X86_FAST_FEATURE_TESTS.
Result is shown for kernelversion 6.7-rc3
Fast CPU feature tests
configname: CONFIG_X86_FAST_FEATURE_TESTS
Linux Kernel Configuration
└─>Processor type and features
└─>Fast CPU feature tests
In linux kernel since version 4.1 (release Date: 2015-06-21)
Some fast-paths in the kernel depend on the capabilities of the CPU.
Say Y here for the kernel to patch in the appropriate code at runtime
based on the capabilities of the CPU. The infrastructure for patching
code at runtime takes up some additional space; space-constrained
embedded systems may wish to say N here to produce smaller, slightly
slower code.
Say Y here for the kernel to patch in the appropriate code at runtime
based on the capabilities of the CPU. The infrastructure for patching
code at runtime takes up some additional space; space-constrained
embedded systems may wish to say N here to produce smaller, slightly
slower code.