linux-kernel - Re: [PATCH V2 05/20] nvdimm/region_label: Add region label updation routine

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Message-ID: <700072760.81757055783458.JavaMail.epsvc@epcpadp2new>
Date: Thu, 4 Sep 2025 19:43:39 +0530
From: Neeraj Kumar <s.neeraj@...sung.com>
To: Dave Jiang <dave.jiang@...el.com>
Cc: linux-cxl@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, gost.dev@...sung.com,
	a.manzanares@...sung.com, vishak.g@...sung.com, neeraj.kernel@...il.com,
	cpgs@...sung.com
Subject: Re: [PATCH V2 05/20] nvdimm/region_label: Add region label updation
 routine

On 15/08/25 04:12PM, Dave Jiang wrote:
>
>
>On 7/30/25 5:11 AM, Neeraj Kumar wrote:
><snip>
>
>> diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
>> index 651847f1bbf9..15d94e3937f0 100644
>> --- a/drivers/nvdimm/nd.h
>> +++ b/drivers/nvdimm/nd.h
>> @@ -322,6 +322,26 @@ static inline void nsl_set_region_uuid(struct nvdimm_drvdata *ndd,
>>  		export_uuid(ns_label->cxl.region_uuid, uuid);
>>  }
>>
>> +static inline bool rgl_uuid_equal(struct cxl_region_label *rg_label,
>> +				  const uuid_t *uuid)
>> +{
>> +	uuid_t tmp;
>> +
>> +	import_uuid(&tmp, rg_label->uuid);
>> +	return uuid_equal(&tmp, uuid);
>
>Why the extra copy via import_uuid() rather than directly compare rg_labe->uuid vs the uuid param?
>
>DJ

Thanks Dave for your suggestion. I have used because of import_uuid()
and uuid_equal() signature difference. Sure I will use uuid_equal()
directly using typecasting and will modify it in next patch-set.

Regards,
Neeraj