linux-kernel - Re: [PATCH 17/17] fs: switch ->s_uuid to uuid

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Date:   Mon, 15 May 2017 22:38:18 +0300
From:   Amir Goldstein <amir73il@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Shaohua Li <shli@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        David Howells <dhowells@...hat.com>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        linux-raid@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/17] fs: switch ->s_uuid to uuid_t

On Mon, May 15, 2017 at 6:43 PM, Christoph Hellwig <hch@....de> wrote:
> For some file systems we still memcpy into it, but in various places this
> already allows us to use the proper uuid helpers.  More to come..
>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---

> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -75,7 +75,7 @@ xfs_uuid_mount(
>
>         /* Publish UUID in struct super_block */
>         BUILD_BUG_ON(sizeof(mp->m_super->s_uuid) != sizeof(uuid_t));

BUILD_BUG_ON not needed anymore now that s_uuid is uuid_t

> -       memcpy(&mp->m_super->s_uuid, uuid, sizeof(uuid_t));
> +       uuid_copy(&mp->m_super->s_uuid, uuid);