clear_bit9
Clears a bit in memory
Usage
void clear_bit(long nr, volatile unsigned long * addr);
Arguments
nr
Bit to clear
addr
Address to start counting from
Overview
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.
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.