linux-kernel - Re: [PATCH v8 7/9] dax: add dax holder helper for filesystems

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Message-ID: <2c0d1b44-5b7f-f4d0-a7ca-0cf692a0cdd4@fujitsu.com>
Date:   Wed, 15 Dec 2021 10:21:00 +0800
From:   Shiyang Ruan <ruansy.fnst@...itsu.com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-xfs@...r.kernel.org>,
        <nvdimm@...ts.linux.dev>, <linux-mm@...ck.org>,
        <linux-fsdevel@...r.kernel.org>, <djwong@...nel.org>,
        <dan.j.williams@...el.com>, <david@...morbit.com>,
        <jane.chu@...cle.com>
Subject: Re: [PATCH v8 7/9] dax: add dax holder helper for filesystems



在 2021/12/14 23:47, Christoph Hellwig 写道:
> On Thu, Dec 02, 2021 at 04:48:54PM +0800, Shiyang Ruan wrote:
>> Add these helper functions, and export them for filesystem use.
> 
> What is the point of adding these wrappers vs just calling the
> underlying functions?

I added them so that they can be called in a friendly way, even if 
CONFIG_DAX is off.  Otherwise, we need #if IS_ENABLED(CONFIG_DAX) to 
wrap them where they are called.


--
Thanks,
Ruan.