time_after_eq
if (time_after_eq(request->emitted_jiffies, recent_enough))
if (time_after_eq(jiffies, end)) { \
#define time_before_eq(a,b) time_after_eq(b,a)
time_after_eq(a,b) && time_before_eq(a,c)
if (time_after_eq(start_time, timeout))