CONVTCK
#define CONVTCK(r) ((r).tv_sec * CLOCKS_PER_SEC \
#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER(2,4,0) ? \