io_uring: do not recalculate ppos unnecessarily

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commit b4aec40015 upstream.

There is a slight optimisation to be had by calculating the correct pos
pointer inside io_kiocb_update_pos and then using that later.

It seems code size drops by a bit:
000000000000a1b0 0000000000000400 t io_read
000000000000a5b0 0000000000000319 t io_write

vs
000000000000a1b0 00000000000003f6 t io_read
000000000000a5b0 0000000000000310 t io_write

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>

...

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Dylan Yudaken 2022-02-22 02:55:03 -08:00 • committed by Greg Kroah-Hartman

parent ff8a070253

commit 05d69b372b

1 changed files with 12 additions and 6 deletions

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io_uring/io_uring.c

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