CLEAR_BIT(9)                        Basic C Library Functions                        CLEAR_BIT(9)



NAME
       clear_bit - Clears a bit in memory

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

ARGUMENTS
       nr
           Bit to clear

       addr
           Address to start counting from

DESCRIPTION
       clear_bit is atomic and may not be reordered. However, it does not contain a memory
       barrier, so if it is used for locking purposes, you should call smp_mb__before_atomic
       and/or smp_mb__after_atomic in order to ensure changes are visible on other processors.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                              CLEAR_BIT(9)