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io_uring: simplify io_alloc_req()

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Extract common code from if/else branches. That is cleaner and optimised
even better.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-09-30 22:57:01 +03:00 committed by Jens Axboe
parent 145cc8c665
commit 291b2821e0
1 changed files with 4 additions and 9 deletions
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13
fs/io_uring.c
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@ -1650,10 +1650,8 @@ static struct io_kiocb *io_get_fallback_req(struct io_ring_ctx *ctx)
static struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx,
struct io_submit_state *state)
{
gfp_t gfp = GFP_KERNEL | __GFP_NOWARN;
struct io_kiocb *req;
if (!state->free_reqs) {
gfp_t gfp = GFP_KERNEL | __GFP_NOWARN;
size_t sz;
int ret;
@ -1670,14 +1668,11 @@ static struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx,
goto fallback;
ret = 1;
}
state->free_reqs = ret - 1;
req = state->reqs[ret - 1];
} else {
state->free_reqs--;
req = state->reqs[state->free_reqs];
state->free_reqs = ret;
}
return req;
state->free_reqs--;
return state->reqs[state->free_reqs];
fallback:
return io_get_fallback_req(ctx);
}