NAME¶

clear_bit - Clears a bit in memory

SYNOPSIS¶

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

ARGUMENTS¶

nr

addr

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_clear_bit and/or smp_mb__after_clear_bit in order to ensure changes are visible on other processors.

COPYRIGHT¶