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io_uring: remove duplicated io_size from rw 

io_size and iov_count in io_read() and io_write() hold the same value,
kill the last one.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-11-07 13:16:26 +00:00 committed by Jens Axboe
parent 10fc72e433
commit 632546c4b5
1 changed files with 6 additions and 10 deletions
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16
fs/io_uring.c
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@ -3464,7 +3464,6 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
struct iov_iter __iter, *iter = &__iter; struct iov_iter __iter, *iter = &__iter;
struct io_async_rw *rw = req->async_data; struct io_async_rw *rw = req->async_data;
ssize_t io_size, ret, ret2; ssize_t io_size, ret, ret2;
size_t iov_count;
bool no_async; bool no_async;
if (rw) if (rw)
@ -3473,8 +3472,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
ret = io_import_iovec(READ, req, &iovec, iter, !force_nonblock); ret = io_import_iovec(READ, req, &iovec, iter, !force_nonblock);
if (ret < 0) if (ret < 0)
return ret; return ret;
iov_count = iov_iter_count(iter); io_size = iov_iter_count(iter);
io_size = iov_count;
req->result = io_size; req->result = io_size;
ret = 0; ret = 0;
@ -3490,7 +3488,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
if (no_async) if (no_async)
goto copy_iov; goto copy_iov;
ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), iov_count); ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), io_size);
if (unlikely(ret)) if (unlikely(ret))
goto out_free; goto out_free;
@ -3509,7 +3507,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
if (req->file->f_flags & O_NONBLOCK) if (req->file->f_flags & O_NONBLOCK)
goto done; goto done;
/* some cases will consume bytes even on error returns */ /* some cases will consume bytes even on error returns */
iov_iter_revert(iter, iov_count - iov_iter_count(iter)); iov_iter_revert(iter, io_size - iov_iter_count(iter));
ret = 0; ret = 0;
goto copy_iov; goto copy_iov;
} else if (ret < 0) { } else if (ret < 0) {
@ -3592,7 +3590,6 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
struct kiocb *kiocb = &req->rw.kiocb; struct kiocb *kiocb = &req->rw.kiocb;
struct iov_iter __iter, *iter = &__iter; struct iov_iter __iter, *iter = &__iter;
struct io_async_rw *rw = req->async_data; struct io_async_rw *rw = req->async_data;
size_t iov_count;
ssize_t ret, ret2, io_size; ssize_t ret, ret2, io_size;
if (rw) if (rw)
@ -3601,8 +3598,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
ret = io_import_iovec(WRITE, req, &iovec, iter, !force_nonblock); ret = io_import_iovec(WRITE, req, &iovec, iter, !force_nonblock);
if (ret < 0) if (ret < 0)
return ret; return ret;
iov_count = iov_iter_count(iter); io_size = iov_iter_count(iter);
io_size = iov_count;
req->result = io_size; req->result = io_size;
/* Ensure we clear previously set non-block flag */ /* Ensure we clear previously set non-block flag */
@ -3620,7 +3616,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
(req->flags & REQ_F_ISREG)) (req->flags & REQ_F_ISREG))
goto copy_iov; goto copy_iov;
ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), iov_count); ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), io_size);
if (unlikely(ret)) if (unlikely(ret))
goto out_free; goto out_free;
@ -3663,7 +3659,7 @@ done:
} else { } else {
copy_iov: copy_iov:
/* some cases will consume bytes even on error returns */ /* some cases will consume bytes even on error returns */
iov_iter_revert(iter, iov_count - iov_iter_count(iter)); iov_iter_revert(iter, io_size - iov_iter_count(iter));
ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false); ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false);
if (!ret) if (!ret)
return -EAGAIN; return -EAGAIN;