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| author | Dylan Yudaken <dylany@fb.com> | 2022-02-22 13:55:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-24 09:19:57 +0300 |
| commit | 076f872314d4da36e878673cbef1eae3514b0c6d (patch) | |
| tree | 465b662d10c708c2a2b7e687abdd26336fe484e8 /io_uring | |
| parent | e9c6556708d3b1f77f1a9e08881f8bb01e98e919 (diff) | |
| download | linux-076f872314d4da36e878673cbef1eae3514b0c6d.tar.xz | |
io_uring: remove duplicated calls to io_kiocb_ppos
commit af9c45ecebaf1b428306f41421f4bcffe439f735 upstream.
io_kiocb_ppos is called in both branches, and it seems that the compiler
does not fuse this. Fusing removes a few bytes from loop_rw_iter.
Before:
$ nm -S fs/io_uring.o | grep loop_rw_iter
0000000000002430 0000000000000124 t loop_rw_iter
After:
$ nm -S fs/io_uring.o | grep loop_rw_iter
0000000000002430 000000000000010d t loop_rw_iter
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index f8a0d228d799..d8926475cd88 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -3300,6 +3300,7 @@ static ssize_t loop_rw_iter(int rw, struct io_kiocb *req, struct iov_iter *iter) struct kiocb *kiocb = &req->rw.kiocb; struct file *file = req->file; ssize_t ret = 0; + loff_t *ppos; /* * Don't support polled IO through this interface, and we can't @@ -3311,6 +3312,8 @@ static ssize_t loop_rw_iter(int rw, struct io_kiocb *req, struct iov_iter *iter) if (kiocb->ki_flags & IOCB_NOWAIT) return -EAGAIN; + ppos = io_kiocb_ppos(kiocb); + while (iov_iter_count(iter)) { struct iovec iovec; ssize_t nr; @@ -3324,10 +3327,10 @@ static ssize_t loop_rw_iter(int rw, struct io_kiocb *req, struct iov_iter *iter) if (rw == READ) { nr = file->f_op->read(file, iovec.iov_base, - iovec.iov_len, io_kiocb_ppos(kiocb)); + iovec.iov_len, ppos); } else { nr = file->f_op->write(file, iovec.iov_base, - iovec.iov_len, io_kiocb_ppos(kiocb)); + iovec.iov_len, ppos); } if (nr < 0) { |