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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 <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2007-06-14 13:10:48 +02:00
parent d96e6e7164
commit cac36bb06e
7 changed files with 22 additions and 20 deletions
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14
fs/splice.c
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@@ -85,8 +85,8 @@ static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe,
buf->flags &= ~PIPE_BUF_FLAG_LRU;
}
static int page_cache_pipe_buf_pin(struct pipe_inode_info *pipe,
struct pipe_buffer *buf)
static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe,
struct pipe_buffer *buf)
{
struct page *page = buf->page;
int err;
@@ -127,7 +127,7 @@ static const struct pipe_buf_operations page_cache_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.pin = page_cache_pipe_buf_pin,
.confirm = page_cache_pipe_buf_confirm,
.release = page_cache_pipe_buf_release,
.steal = page_cache_pipe_buf_steal,
.get = generic_pipe_buf_get,
@@ -147,7 +147,7 @@ static const struct pipe_buf_operations user_page_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.pin = generic_pipe_buf_pin,
.confirm = generic_pipe_buf_confirm,
.release = page_cache_pipe_buf_release,
.steal = user_page_pipe_buf_steal,
.get = generic_pipe_buf_get,
@@ -525,7 +525,7 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe,
loff_t pos = sd->pos;
int ret, more;
ret = buf->ops->pin(pipe, buf);
ret = buf->ops->confirm(pipe, buf);
if (!ret) {
more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
@@ -569,7 +569,7 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
/*
* make sure the data in this buffer is uptodate
*/
ret = buf->ops->pin(pipe, buf);
ret = buf->ops->confirm(pipe, buf);
if (unlikely(ret))
return ret;
@@ -1341,7 +1341,7 @@ static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
char *src;
int ret;
ret = buf->ops->pin(pipe, buf);
ret = buf->ops->confirm(pipe, buf);
if (unlikely(ret))
return ret;