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block: add a rq_list type

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Replace the semi-open coded request list helpers with a proper rq_list
type that mirrors the bio_list and has head and tail pointers.  Besides
better type safety this actually allows to insert at the tail of the
list, which will be useful soon.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241113152050.157179-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2024-11-13 16:20:44 +01:00
committed by Jens Axboe
parent e8225ab150
commit a3396b9999
11 changed files with 102 additions and 86 deletions
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4
io_uring/rw.c
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@@ -1160,12 +1160,12 @@ int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin)
poll_flags |= BLK_POLL_ONESHOT;
/* iopoll may have completed current req */
if (!rq_list_empty(iob.req_list) ||
if (!rq_list_empty(&iob.req_list) ||
READ_ONCE(req->iopoll_completed))
break;
}
if (!rq_list_empty(iob.req_list))
if (!rq_list_empty(&iob.req_list))
iob.complete(&iob);
else if (!pos)
return 0;