diff options
Diffstat (limited to 'include/linux/pipe_fs_i.h')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 608a9eb86bff..8ff23bf5a819 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -62,9 +62,6 @@ struct pipe_inode_info { unsigned int tail; unsigned int max_usage; unsigned int ring_size; -#ifdef CONFIG_WATCH_QUEUE - bool note_loss; -#endif unsigned int nr_accounted; unsigned int readers; unsigned int writers; @@ -72,6 +69,9 @@ struct pipe_inode_info { unsigned int r_counter; unsigned int w_counter; bool poll_usage; +#ifdef CONFIG_WATCH_QUEUE + bool note_loss; +#endif struct page *tmp_page; struct fasync_struct *fasync_readers; struct fasync_struct *fasync_writers; @@ -125,6 +125,22 @@ struct pipe_buf_operations { }; /** + * pipe_has_watch_queue - Check whether the pipe is a watch_queue, + * i.e. it was created with O_NOTIFICATION_PIPE + * @pipe: The pipe to check + * + * Return: true if pipe is a watch queue, false otherwise. + */ +static inline bool pipe_has_watch_queue(const struct pipe_inode_info *pipe) +{ +#ifdef CONFIG_WATCH_QUEUE + return pipe->watch_queue != NULL; +#else + return false; +#endif +} + +/** * pipe_empty - Return true if the pipe is empty * @head: The pipe ring head pointer * @tail: The pipe ring tail pointer |