linux-kernel - [QUESTION] mm: Redundant const parameter?

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Message-ID: <e5f01ffe-de51-4079-a87f-2886788422f9@arm.com>
Date: Fri, 31 May 2024 16:42:59 +0530
From: Dev Jain <dev.jain@....com>
To: zhouchengming@...edance.com
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 Anshuman.Khandual@....com
Subject: [QUESTION] mm: Redundant const parameter?

Hi Chengming,

In mm/slub.c, you had defined slab_test_node_partial() to take a const 
parameter.

Is there any point of taking in a const, when you are anyways 
typecasting it to

a (struct folio *) from (const struct folio *) ? In fact, at the place 
where you call

slab_test_node_partial(), the struct slab *slab is not const.

Please comment.

Thanks

DJ