change_bit(9) centos man page | unix.com

CHANGE_BIT(9)						     Basic C Library Functions						     CHANGE_BIT(9)

NAME
       change_bit - Toggle a bit in memory

SYNOPSIS
       void change_bit(int nr, volatile unsigned long * addr);

ARGUMENTS
       nr
	   Bit to change

       addr
	   Address to start counting from

DESCRIPTION
       change_bit is atomic and may not be reordered. Note that nr may be almost arbitrarily large; this function is not restricted to acting on a
       single-word quantity.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     CHANGE_BIT(9)