pipe: add pipe_buf_steal() helper
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
@@ -151,6 +151,17 @@ static inline int pipe_buf_confirm(struct pipe_inode_info *pipe,
|
||||
return buf->ops->confirm(pipe, buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* pipe_buf_steal - attempt to take ownership of a pipe_buffer
|
||||
* @pipe: the pipe that the buffer belongs to
|
||||
* @buf: the buffer to attempt to steal
|
||||
*/
|
||||
static inline int pipe_buf_steal(struct pipe_inode_info *pipe,
|
||||
struct pipe_buffer *buf)
|
||||
{
|
||||
return buf->ops->steal(pipe, buf);
|
||||
}
|
||||
|
||||
/* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual
|
||||
memory allocation, whereas PIPE_BUF makes atomicity guarantees. */
|
||||
#define PIPE_SIZE PAGE_SIZE
|
||||
|
Reference in New Issue
Block a user