r11d 139 arch/x86/entry/calling.h xorl %r11d, %r11d /* nospec r11 */ r11d 54 arch/x86/include/asm/inst.h .ifc \r32,%r11d r11d 104 tools/perf/arch/x86/util/perf_regs.c SDT_NAME_REG(r11d, r11),