linux-kernel - Re: [PATCH RFC -next 1/7] kernfs: export pr_cont_kernfs

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Date: Thu, 13 Jun 2024 14:55:27 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Greg KH <gregkh@...uxfoundation.org>, Yu Kuai <yukuai1@...weicloud.com>
Cc: axboe@...nel.dk, tj@...nel.org, josef@...icpanda.com,
 lizefan.x@...edance.com, hannes@...xchg.org, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, cgroups@...r.kernel.org, yi.zhang@...wei.com,
 yangerkun@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC -next 1/7] kernfs: export pr_cont_kernfs_path()

Hi,

在 2024/06/13 13:55, Greg KH 写道:
> On Thu, Jun 13, 2024 at 09:49:31AM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> This helper is used in iocost, prepare to build iocost as kernel module.
>>
>> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
>> ---
>>   fs/kernfs/dir.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
>> index 458519e416fe..84ad163a4281 100644
>> --- a/fs/kernfs/dir.c
>> +++ b/fs/kernfs/dir.c
>> @@ -279,6 +279,7 @@ void pr_cont_kernfs_path(struct kernfs_node *kn)
>>   out:
>>   	spin_unlock_irqrestore(&kernfs_pr_cont_lock, flags);
>>   }
>> +EXPORT_SYMBOL_GPL(pr_cont_kernfs_path);
> 
> This isn't the helper that needs to be exported, it's a include wrapper
> that is using this for cgroups.  Please document this much better and
> perhaps, just fix up the cgroups code instead?

Thanks for the notice, I didn't think much of this, just export API that
is called from iocost. I'll look into this.

Thanks,
Kuai

> 
> thanks,
> 
> greg k-h
> .
>