linux-kernel - Re: [PATCH v2 1/1] mm/filemap: remove hugetlb special casing in filemap.c

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Date:   Tue, 11 Jul 2023 12:32:45 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Sidhartha Kumar <sidhartha.kumar@...cle.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        willy@...radead.org, songmuchun@...edance.com,
        mike.kravetz@...cle.com, david@...hat.com
Subject: Re: [PATCH v2 1/1] mm/filemap: remove hugetlb special casing in
 filemap.c

On Mon, 10 Jul 2023 16:04:50 -0700 Sidhartha Kumar <sidhartha.kumar@...cle.com> wrote:

> Remove special cased hugetlb handling code within the page cache by
> changing the granularity of each index to the base page size rather than
> the huge page size. Adds new wrappers for hugetlb code to to interact with the
> page cache which convert to a linear index.

folio_more_pages() was just removed by "filemap: add
filemap_map_folio_range()"
(https://lkml.kernel.org/r/20230710204339.3554919-35-willy@infradead.org).
It looks like simply dropping that hunk is OK, but please check.

I'll be pushing this all out in a couple hours I expect.

However the series which contains "filemap: add
filemap_map_folio_range()" might be about to be dropped because of
possible s390 breakage.

Also, I don't think it's necessary to have a [0/N] intro for a single
patch.  Maybe crunch all the (useful) info into the single patch's
changelog?

Thanks.