linux-kernel - Re: [PATCH RFC 3/5] lightnvm: add sync support for submit

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Message-ID: <20151215123436.GA26021@infradead.org>
Date:	Tue, 15 Dec 2015 04:34:36 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Matias Bj??rling <m@...rling.me>
Cc:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 3/5] lightnvm: add sync support for submit_io

On Mon, Dec 14, 2015 at 02:17:05PM +0100, Matias Bj??rling wrote:
> Allow read and write I/Os to be issued synchronous. Users include the
> LightNVM core to implement system block support and similar.

I think the right way to implement this is to wait in the caller,
e.g. set your end_io handler to a trivial one that just does a complete
and add a completion that you can wait on in the caller.
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