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| author | Christoph Hellwig <hch@lst.de> | 2018-03-05 07:26:05 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-26 09:16:44 +0200 |
| commit | 9965ed174e7d38896e5d2582159d8ef31ecd4cb5 (patch) | |
| tree | 955bfa805fff87c169a4814deaf311b90cca84b2 /fs | |
| parent | 6e8b704df58407aad7607053cb1b5ead4ac4a0bc (diff) | |
| download | linux-stable-9965ed174e7d38896e5d2582159d8ef31ecd4cb5.tar.gz linux-stable-9965ed174e7d38896e5d2582159d8ef31ecd4cb5.tar.bz2 linux-stable-9965ed174e7d38896e5d2582159d8ef31ecd4cb5.zip | |
fs: add new vfs_poll and file_can_poll helpers
These abstract out calls to the poll method in preparation for changes
in how we poll.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/eventpoll.c | 5 | ||||
| -rw-r--r-- | fs/select.c | 23 |
2 files changed, 10 insertions, 18 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 602ca4285b2e..67db22fe99c5 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -884,8 +884,7 @@ static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, pt->_key = epi->event.events; if (!is_file_epoll(epi->ffd.file)) - return epi->ffd.file->f_op->poll(epi->ffd.file, pt) & - epi->event.events; + return vfs_poll(epi->ffd.file, pt) & epi->event.events; ep = epi->ffd.file->private_data; poll_wait(epi->ffd.file, &ep->poll_wait, pt); @@ -2025,7 +2024,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, /* The target file descriptor must support poll */ error = -EPERM; - if (!tf.file->f_op->poll) + if (!file_can_poll(tf.file)) goto error_tgt_fput; /* Check if EPOLLWAKEUP is allowed */ diff --git a/fs/select.c b/fs/select.c index 25da26253485..e30def680b2e 100644 --- a/fs/select.c +++ b/fs/select.c @@ -502,14 +502,10 @@ static int do_select(int n, fd_set_bits *fds, struct timespec64 *end_time) continue; f = fdget(i); if (f.file) { - const struct file_operations *f_op; - f_op = f.file->f_op; - mask = DEFAULT_POLLMASK; - if (f_op->poll) { - wait_key_set(wait, in, out, - bit, busy_flag); - mask = (*f_op->poll)(f.file, wait); - } + wait_key_set(wait, in, out, bit, + busy_flag); + mask = vfs_poll(f.file, wait); + fdput(f); if ((mask & POLLIN_SET) && (in & bit)) { res_in |= bit; @@ -825,13 +821,10 @@ static inline __poll_t do_pollfd(struct pollfd *pollfd, poll_table *pwait, /* userland u16 ->events contains POLL... bitmap */ filter = demangle_poll(pollfd->events) | EPOLLERR | EPOLLHUP; - mask = DEFAULT_POLLMASK; - if (f.file->f_op->poll) { - pwait->_key = filter | busy_flag; - mask = f.file->f_op->poll(f.file, pwait); - if (mask & busy_flag) - *can_busy_poll = true; - } + pwait->_key = filter | busy_flag; + mask = vfs_poll(f.file, pwait); + if (mask & busy_flag) + *can_busy_poll = true; mask &= filter; /* Mask out unneeded events. */ fdput(f); |