Name

clear_bit — Clears a bit in memory

Synopsis

void clear_bit (int  nr,
 volatile void *  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_clear_bit and/or smp_mb__after_clear_bit in order to ensure changes are visible on other processors.