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Message-ID: <bdca2e2e-acdb-4ea5-9017-6c1a58353452@suse.cz>
Date: Tue, 22 Jul 2025 16:22:59 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Christoph Hellwig <hch@...radead.org>
Cc: David Hildenbrand <david@...hat.com>, Mike Rapoport <rppt@...nel.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] MAINTAINERS: add further core files to mm core
 section

On 7/22/25 15:53, Lorenzo Stoakes wrote:
> On Tue, Jun 17, 2025 at 06:53:53AM +0300, Mike Rapoport wrote:
>>
>> > > +F:	mm/io-mapping.c
>>
>> This is an interesting one. There are no in tree users of the only function
>> it contains.
> 
> Hi Christoph,
> 
> Was going through and making sure mm files have places in MAINTAINERS and
> came across this - I see you added this, but it doesn't appear to be being
> used anywhere. Should it be removed or if not wonder where it ought to go?

It seems it only gained its only user in b739f125e4eb ("i915: use
io_mapping_map_user") but reverted a month later by 0e4fe0c9f2f9 ("Revert
"i915: use io_mapping_map_user"") all that in 2021.

Ideally i915 would be converted again with the revert reasons investigated
properly this time. Otherwise we should remove the thing.

> We're contemplating an 'MM MISC' section where it could live potentially.
> 
> Cheers, Lorenzo


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