Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

NAME
       __change_bit - Toggle a bit in memory


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


ARGUMENTS
       nr     the bit to change

       addr   the address to start counting from


DESCRIPTION
       Unlike change_bit, this function is non-atomic and may be reordered. If
       it’s called on the same region of memory simultaneously, the effect may
       be that only one operation succeeds.