centos man page for module_exit

MODULE_EXIT(9)							   Driver Basics						    MODULE_EXIT(9)

NAME
       module_exit - driver exit entry point

SYNOPSIS
       module_exit(x);

ARGUMENTS
       x
	   function to be run when driver is removed

DESCRIPTION
       module_exit will wrap the driver clean-up code with cleanup_module when used with rmmod when the driver is a module. If the driver is
       statically compiled into the kernel, module_exit has no effect. There can only be one per module.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							    MODULE_EXIT(9)