arch_max_pkey      52 arch/powerpc/include/asm/pkeys.h #define arch_max_pkey() pkeys_total
arch_max_pkey       7 arch/x86/include/asm/pkeys.h #define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? 16 : 1)
arch_max_pkey      10 include/linux/pkeys.h #define arch_max_pkey() (1)