brelse Kernel Service
Purpose
Frees the specified buffer.
Syntax
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/buf.h>void brelse ( bp)
struct buf *bp;
struct buf *bp;
Parameter
| Item | Description |
|---|---|
| bp | Specifies the address
of the buf structure to be freed. On a platform that supports storage keys, the passed in bp parameter must be in the KKEY_PUBLIC or KKEY_BLOCK_DEV protection domain. |
Description
The brelse kernel service frees the buffer to which the bp parameter points.
The brelse kernel service awakens any processes waiting for this buffer or for another free buffer. The buffer is then put on the list of available buffers. The buffer is also marked as not busy so that it can either be reclaimed or reallocated.
The brelse service has no return values.
Execution Environment
The brelse kernel service can be called from either the process or interrupt environment.