linux-kernel - Re: [PATCH -next] rsxx: Convert to DEFINE_SHOW

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Date:   Fri, 17 Jul 2020 11:51:28 +0800
From:   miaoqinglang <miaoqinglang@...wei.com>
To:     Jens Axboe <axboe@...nel.dk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joshua Morris <josh.h.morris@...ibm.com>,
        Philip Kelleher <pjk1939@...ux.ibm.com>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] rsxx: Convert to DEFINE_SHOW_ATTRIBUTE



在 2020/7/17 10:16, Jens Axboe 写道:
> On 7/16/20 7:37 PM, miaoqinglang wrote:
>>
>> 在 2020/7/16 23:45, Jens Axboe 写道:
>>> On 7/16/20 3:04 AM, Qinglang Miao wrote:
>>>> From: Liu Shixin <liushixin2@...wei.com>
>>>>
>>>> Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
>>> None of these apply against the 5.9 block tree, looks like some
>>> read -> read_iter conversion has happened in another branch that
>>> I'm not privy to.
>>
>> Hi Jens,
>>
>>       Sorry I didn't mention it in commit log, but this patch is based
>> on linux-next where commit <4d4901c6d7> has switched over direct
>> seq_read method calls to seq_read_iter, this is why there's conflict in
>> your apply.
>>
>>       Do you think I should send a new patch based on 5.8rc?
> 
> That'll just create a needless conflict. But I don't even know what tree
> is carrying the patch that changes it to use seq_read_iter, so hard to
> make other suggestions.
This patch is against linux-next, which is ahead of both
linux-block and mainline tree.  Here's the interlinkage:

https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next/+/4d4901c6d748efab8aab6e7d2405dadaed0bea50](javascript:;)

or you can find the commit <4d4901c6d7> which changes seq_read to 
seq_read_iter with the -next tag, in fact, it's just a simple script:

sed -i -e 's/\.read\(\s*=\s*\)seq_read/\.read_iter\1seq_read_iter/g'

By the way, there won't be needless confict because seq_read in both
file and macro are switched to seq_read_iter together.
> 
> Alternatively, I can hang on to them until the other change hits
> mainline, and then queue them up after that.
> 
That looks good to me. Let me know if patch based on 5.8rc is needed.

Thanks.

Qinglang

.