usleep_range(9) centos man page | unix.com

USLEEP_RANGE(9) 						   Driver Basics						   USLEEP_RANGE(9)

NAME
       usleep_range - Drop in replacement for udelay where wakeup is flexible

SYNOPSIS
       void usleep_range(unsigned long min, unsigned long max);

ARGUMENTS
       min
	   Minimum time in usecs to sleep

       max
	   Maximum time in usecs to sleep

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   USLEEP_RANGE(9)