CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK is not available for the selected architecture x86.
Result is shown for architecture arm64
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK (not configurable)
configname: CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK
Linux Kernel Configuration
└─>Kernel Features
└─>ARCH_ENABLE_SPLIT_PMD_PTLOCK