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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
Download patch file Download diff file Expand all files Collapse all files

9
include/linux/pipe_fs_i.h
View file

@ -35,20 +35,21 @@ struct pipe_inode_info {
/*
* Note on the nesting of these functions:
*
* ->pin()
* ->confirm()
* ->steal()
* ...
* ->map()
* ...
* ->unmap()
*
* That is, ->map() must be called on a pinned buffer, same goes for ->steal().
* That is, ->map() must be called on a confirmed buffer,
* same goes for ->steal().
*/
struct pipe_buf_operations {
int can_merge;
void * (*map)(struct pipe_inode_info *, struct pipe_buffer *, int);
void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *, void *);
int (*pin)(struct pipe_inode_info *, struct pipe_buffer *);
int (*confirm)(struct pipe_inode_info *, struct pipe_buffer *);
void (*release)(struct pipe_inode_info *, struct pipe_buffer *);
int (*steal)(struct pipe_inode_info *, struct pipe_buffer *);
void (*get)(struct pipe_inode_info *, struct pipe_buffer *);
@ -69,7 +70,7 @@ void __free_pipe_info(struct pipe_inode_info *);
void *generic_pipe_buf_map(struct pipe_inode_info *, struct pipe_buffer *, int);
void generic_pipe_buf_unmap(struct pipe_inode_info *, struct pipe_buffer *, void *);
void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_pin(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
#endif