linux-kernel - Re: [PATCH] mm: madvise: make MADV

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Message-ID: <106c0d2c-7492-4a81-969c-de4f1798586c@kuka.com>
Date: Wed, 14 May 2025 17:07:58 +0200
From: Ignacio Moreno Gonzalez <Ignacio.MorenoGonzalez@...a.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Andrew Morton <akpm@...ux-foundation.org>
Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>, yang@...amperecomputing.com,
 willy@...radead.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: madvise: make MADV_NOHUGEPAGE a no-op if !THP

On 5/14/2025 3:52 PM, Lorenzo Stoakes wrote:

> I have pinged s390 people on there, but I don't think this is going to make this
> cycle given we will probably need to coordinate with them to fix up this enum
> name (which seems the best solution to me!...)

They answered that it would be ok for them to do a quick fix over the mm tree:

https://lore.kernel.org/linux-mm/6f8f3780-902b-49d4-a766-ea2e1a8f85ea@linux.ibm.com/

>> +#include <uapi/asm/mman.h>
> 
> Also this should be linux/mman.h I believe, sorry for not catching first time round...!
> 

Including linux/mman.h leads to a compilation error:

../include/linux/huge_mm.h:601:23: error: ‘MADV_NOHUGEPAGE’

Including uapi/linux/mman.h works, but I am not sure if that is correct.