xsec              122 arch/powerpc/kernel/time.c #define SCALE_XSEC(xsec, max)	(((xsec) * max) / XSEC_PER_SEC)
xsec              125 arch/powerpc/kernel/time.c #define SCALE_XSEC(xsec, max)	mulhwu((xsec) << 12, max)