io_uring: clean up io_import_iovec

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Make io_import_iovec taking struct io_rw_state instead of an iter
pointer. First it takes care of initialising iovec pointer, which can be
forgotten. Even more, we can not init it if not needed, e.g. in case of
IORING_OP_READ_FIXED or IORING_OP_READ. Also hide saving iter_state
inside of it by splitting out an inline function of it to avoid extra
ifs.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b1bbc213a95e5272d4da5867bb977d9acb6f2109.1634144845.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-10-14 16:10:18 +01:00 • committed by Jens Axboe

parent 51aac424ae

commit 5e49c973fc

1 changed files with 25 additions and 15 deletions

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fs/io_uring.c

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