From: Christoph Hellwig <hch@lst.de>
To: Charles Machalow <csm10495@gmail.com>
Cc: linux-nvme@lists.infradead.org, marta.rybczynska@kalray.eu,
Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@fb.com>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] nvme: change nvme_passthru_cmd64's result field.
Date: Thu, 31 Oct 2019 14:39:21 +0100 [thread overview]
Message-ID: <20191031133921.GA4763@lst.de> (raw)
In-Reply-To: <20191031050338.12700-1-csm10495@gmail.com>
On Wed, Oct 30, 2019 at 10:03:38PM -0700, Charles Machalow wrote:
> Changing nvme_passthru_cmd64's result field to be backwards compatible
> with the nvme_passthru_cmd/nvme_admin_cmd struct in terms of the result
> field. With this change the first 32 bits of result in either case
> point to CQE DW0. This allows userspace tools to use the new structure
> when using the old ADMIN/IO_CMD ioctls or new ADMIN/IO_CMD64 ioctls.
All that casting is a pretty bad idea. please just add an explicit
reserved field before the result, and check that it always is zero
in the ioctl handler.
next prev parent reply other threads:[~2019-10-31 13:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 5:03 [PATCH] nvme: change nvme_passthru_cmd64's result field Charles Machalow
2019-10-31 13:39 ` Christoph Hellwig [this message]
[not found] ` <CANSCoS8rN6g7u6iG4SRTcXjdj68cbimvX1n1Ex+FBAkhAAivJA@mail.gmail.com>
2019-10-31 13:59 ` Christoph Hellwig
2019-10-31 15:39 ` Charles Machalow
2019-10-31 13:59 ` Charles Machalow
2019-11-04 14:34 ` Marta Rybczynska
2019-11-04 14:51 ` Charles Machalow
2019-11-04 14:56 ` Marta Rybczynska
2019-11-04 15:01 ` Keith Busch
2019-11-04 15:29 ` Christoph Hellwig
2019-11-04 15:32 ` Keith Busch
2019-11-04 15:01 ` Charles Machalow
2019-11-04 15:16 ` Marta Rybczynska
2019-11-04 15:20 ` Charles Machalow
2019-11-04 15:30 ` Christoph Hellwig
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