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clear_bit
Langue: en
Version: May 2009 (fedora - 06/07/09)
Section: 9 (Appels noyau Linux)
NAME
clear_bit - Clears a bit in memorySYNOPSIS
- void clear_bit(int 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_clear_bit and/or smp_mb__after_clear_bit in order to ensure changes are visible on other processors.
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