linux-kernel - Re: [RESEND PATCH 1/3] bcache: Remove redundant parameter for cache

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Date:	Fri, 1 Jul 2016 14:18:56 +0800
From:	wangyijing <wangyijing@...wei.com>
To:	Coly Li <colyli@...e.de>, Coly Li <i@...y.li>, <axboe@...com>,
	"Kent Overstreet" <kent.overstreet@...il.com>
CC:	Eric Wheeler <git@...ux.ewheeler.net>,
	<linux-bcache@...r.kernel.org>, <linux-raid@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 1/3] bcache: Remove redundant parameter for
 cache_alloc()



在 2016/7/1 12:24, Coly Li 写道:
> 在 16/7/1 上午10:09, wangyijing 写道:
>>
>>
>> 在 2016/6/29 18:20, Coly Li 写道:
>>> 在 16/6/22 上午10:10, Yijing Wang 写道:
>>>> Cache_sb is not used in cache_alloc, and we have copied
>>>> sb info to cache->sb already, remove it.
>>>>
>>>> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
>>>> ---
>>>>  drivers/md/bcache/super.c |    4 ++--
>>>>  1 files changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
>>>> index f5dbb4e..aecaace 100644
>>>> --- a/drivers/md/bcache/super.c
>>>> +++ b/drivers/md/bcache/super.c
>>>> @@ -1803,7 +1803,7 @@ void bch_cache_release(struct kobject *kobj)
>>>>  	module_put(THIS_MODULE);
>>>>  }
>>>>  
>>>> -static int cache_alloc(struct cache_sb *sb, struct cache *ca)
>>>> +static int cache_alloc(struct cache *ca)
>>>>  {
>>>>  	size_t free;
>>>>  	struct bucket *b;
>>>> @@ -1858,7 +1858,7 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
>>>>  	if (blk_queue_discard(bdev_get_queue(ca->bdev)))
>>>>  		ca->discard = CACHE_DISCARD(&ca->sb);
>>>>  
>>>> -	ret = cache_alloc(sb, ca);
>>>> +	ret = cache_alloc(ca);
>>>
>>> I am not sure whether struct cache_b *sb will be used in future, I
>>> suggest to let it be for now.
>>>
>>
>> We have copied sb to ca->sb, so if we need sb info in future, we could get info from ca->sb.
>>
> 
> Hi Yijing,
> 
> Your point makes sense, please add
> 	Reviewed-by: Coly Li <colyli@...e.de>
> in your patch, if you don't mind :-)
> 
> Thanks for your interpretation.
> 
> Coly

Thanks for your review very much!

Thanks!
Yijing.



> 
> .
>