_ASM_ARG1
"movb $0, (%%" _ASM_ARG1 ")",
" movl $0x1234, (%" _ASM_ARG1 ")\n"
ALTERNATIVE("", "lea %[mem], %%" _ASM_ARG1 "; call __alt_reloc_selftest;", X86_FEATURE_ALWAYS)
: _ASM_ARG1