Date: Mon, 12 Aug 2013 10:17:18 -0400
From: Tejun Heo <tj@kernel.org>
To: Tang Chen <tangchen@cn.fujitsu.com>
Cc: robert.moore@intel.com, lv.zheng@intel.com, rjw@sisk.pl, lenb@kernel.org,
        tglx@linutronix.de, mingo@elte.hu, hpa@zytor.com,
        akpm@linux-foundation.org, trenn@suse.de, yinghai@kernel.org,
        jiang.liu@huawei.com, wency@cn.fujitsu.com, laijs@cn.fujitsu.com,
        isimatu.yasuaki@jp.fujitsu.com, izumi.taku@jp.fujitsu.com,
        mgorman@suse.de, minchan@kernel.org, mina86@mina86.com,
        gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com,
        lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com,
        prarit@redhat.com, zhangyanfei@cn.fujitsu.com, yanghy@cn.fujitsu.com,
        x86@kernel.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        linux-acpi@vger.kernel.org
Subject: Re: [PATCH part2 2/4] earlycpio.c: Fix the confusing comment of
 find_cpio_data().
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On Thu, Aug 08, 2013 at 01:03:57PM +0800, Tang Chen wrote:
> The comments of find_cpio_data() says:
> 
>   * @offset: When a matching file is found, this is the offset to the
>   *          beginning of the cpio. ......
> 
> But according to the code,
> 
>   dptr = PTR_ALIGN(p + ch[C_NAMESIZE], 4);
>   nptr = PTR_ALIGN(dptr + ch[C_FILESIZE], 4);
>   ....
>   *offset = (long)nptr - (long)data;	/* data is the cpio file */
> 
> @offset is the offset of the next file, not the matching file itself.
> This is confused and may cause unnecessary waste of time to debug.
> So fix it.
> 
> v1 -> v2:
> As tj suggested, rename @offset to @nextoff which is more clear to
> users. And also adjust the new comments.
> 
> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>

Reviewed-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun
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