diff options
Diffstat (limited to 'fs/select.c')
| -rw-r--r-- | fs/select.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/select.c b/fs/select.c index e30def680b2e..bc3cc0f98896 100644 --- a/fs/select.c +++ b/fs/select.c @@ -34,6 +34,29 @@ #include <linux/uaccess.h> +__poll_t vfs_poll(struct file *file, struct poll_table_struct *pt) +{ + if (file->f_op->poll) { + return file->f_op->poll(file, pt); + } else if (file_has_poll_mask(file)) { + unsigned int events = poll_requested_events(pt); + struct wait_queue_head *head; + + if (pt && pt->_qproc) { + head = file->f_op->get_poll_head(file, events); + if (!head) + return DEFAULT_POLLMASK; + if (IS_ERR(head)) + return EPOLLERR; + pt->_qproc(file, head, pt); + } + + return file->f_op->poll_mask(file, events); + } else { + return DEFAULT_POLLMASK; + } +} +EXPORT_SYMBOL_GPL(vfs_poll); /* * Estimate expected accuracy in ns from a timeval. |