X86_FEATURE_CX16
#define system_has_cmpxchg128() boot_cpu_has(X86_FEATURE_CX16)
"cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \
"cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \
if (!boot_cpu_has(X86_FEATURE_CX16)) {
if (boot_cpu_has(X86_FEATURE_CX16))