clear_bit
Section: Kernel Hacker's Manual (9)
Updated: clear_bit
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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.
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
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