centos man page for test_and_clear_bit

TEST_AND_CLEAR_BIT(9)					     Basic C Library Functions					     TEST_AND_CLEAR_BIT(9)

NAME
       test_and_clear_bit - Clear a bit and return its old value

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

ARGUMENTS
       nr
	   Bit to clear

       addr
	   Address to count from

DESCRIPTION
       This operation is atomic and cannot be reordered. It also implies a memory barrier.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     TEST_AND_CLEAR_BIT(9)