linux-kernel - Re: [GIT PULL] two more s390 bug fixes for 4.17

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Date:   Wed, 30 May 2018 00:41:30 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [GIT PULL] two more s390 bug fixes for 4.17

> -	req->completion_data = cqr;
> +	*((struct dasd_ccw_req **) blk_mq_rq_to_pdu(req)) = cqr;
> +

Please don't play such tricks.  In general your driver structure
should have struct request embedded.  If for some reason
struct dasd_ccw_req has a different life time please create a new
structure instead of these hacks.

In either way this really doesn't look like a post-rc7 change.