EAX_EDX_RET 34 include/asm-x86/msr.h #define EAX_EDX_RET(val, low, high) "=a" (low), "=d" (high) EAX_EDX_RET 39 include/asm-x86/msr.h #define EAX_EDX_RET(val, low, high) "=A" (val)