r10d 138 arch/x86/entry/calling.h xorl %r10d, %r10d /* nospec r10 */ r10d 51 arch/x86/include/asm/inst.h .ifc \r32,%r10d r10d 101 tools/perf/arch/x86/util/perf_regs.c SDT_NAME_REG(r10d, r10),