linux-kernel - Re: [PATCH V3 05/20] nvdimm/namespace_label: Add namespace label changes as per CXL LSA v2.1

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Message-ID: <700072760.81758556383053.JavaMail.epsvc@epcpadp2new>
Date: Mon, 22 Sep 2025 18:33:30 +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 V3 05/20] nvdimm/namespace_label: Add namespace label
 changes as per CXL LSA v2.1

On 19/09/25 04:59PM, Dave Jiang wrote:
>
>
>On 9/17/25 6:41 AM, Neeraj Kumar wrote:
>> CXL 3.2 Spec mentions CXL LSA 2.1 Namespace Labels at section 9.13.2.5
>> Modified __pmem_label_update function using setter functions to update
>> namespace label as per CXL LSA 2.1
>>
>> Signed-off-by: Neeraj Kumar <s.neeraj@...sung.com>
>> ---
>>  drivers/nvdimm/label.c |  3 +++
>>  drivers/nvdimm/nd.h    | 23 +++++++++++++++++++++++
>>  2 files changed, 26 insertions(+)
>>
>> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
>> index 3235562d0e1c..182f8c9a01bf 100644
>> --- a/drivers/nvdimm/label.c
>> +++ b/drivers/nvdimm/label.c
>> +static inline void nsl_set_type(struct nvdimm_drvdata *ndd,
>> +				struct nd_namespace_label *ns_label)
>> +{
>> +	if (ndd->cxl && ns_label)
>> +		uuid_parse(CXL_NAMESPACE_UUID, (uuid_t *) ns_label->cxl.type);
>
>Personally would prefer something like:
>
>if (!(ndd->cxl && ns_label))
>	return;
>uuid_parse(....);
>
>Also, no space needed after casting.
>
>> +}
>> +
>> +static inline void nsl_set_alignment(struct nvdimm_drvdata *ndd,
>> +				     struct nd_namespace_label *ns_label,
>> +				     u32 align)
>> +{
>> +	if (ndd->cxl)
>> +		ns_label->cxl.align = __cpu_to_le32(align);
>
>same comment as above
>> +}
>> +
>> +static inline void nsl_set_region_uuid(struct nvdimm_drvdata *ndd,
>> +				       struct nd_namespace_label *ns_label,
>> +				       const uuid_t *uuid)
>> +{
>> +	if (ndd->cxl && uuid)
>> +		export_uuid(ns_label->cxl.region_uuid, uuid);
>
>same comment as above

Sure Dave, I will fix it in next patch-set


Regards,
Neeraj