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pipe: change the ->pin() operation to ->confirm()

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The name 'pin' was badly chosen, it doesn't pin a pipe buffer
in the most commonly used sense in the kernel. So change the
name to 'confirm', after debating this issue with Hugh
Dickins a bit.

A good return from ->confirm() means that the buffer is really
there, and that the contents are good.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2007-06-14 13:10:48 +02:00
commit cac36bb06e
7 changed files with 22 additions and 20 deletions
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9
fs/pipe.c
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@ -203,7 +203,8 @@ void generic_pipe_buf_get(struct pipe_inode_info *info, struct pipe_buffer *buf)
page_cache_get(buf->page);
}
int generic_pipe_buf_pin(struct pipe_inode_info *info, struct pipe_buffer *buf)
int generic_pipe_buf_confirm(struct pipe_inode_info *info,
struct pipe_buffer *buf)
{
return 0;
}
@ -212,7 +213,7 @@ static const struct pipe_buf_operations anon_pipe_buf_ops = {
.can_merge = 1,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.pin = generic_pipe_buf_pin,
.confirm = generic_pipe_buf_confirm,
.release = anon_pipe_buf_release,
.steal = generic_pipe_buf_steal,
.get = generic_pipe_buf_get,
@ -252,7 +253,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov,
if (chars > total_len)
chars = total_len;
error = ops->pin(pipe, buf);
error = ops->confirm(pipe, buf);
if (error) {
if (!ret)
error = ret;
@ -373,7 +374,7 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov,
int error, atomic = 1;
void *addr;
error = ops->pin(pipe, buf);
error = ops->confirm(pipe, buf);
if (error)
goto out;