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Message-ID: <20250904121438.3d2daab2@canb.auug.org.au>
Date: Thu, 4 Sep 2025 12:14:38 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Max Kellermann <max.kellermann@...os.com>, Linux Kernel Mailing List
<linux-kernel@...r.kernel.org>, Linux Next Mailing List
<linux-next@...r.kernel.org>
Subject: linux-next: build warning after merge of the mm-unstable tree
Hi all,
After merging the mm-unstable tree, today's linux-next build (arm
multi_v7_defconfig) produced this warning:
In file included from include/linux/highmem.h:14,
from include/linux/bvec.h:10,
from include/linux/blk_types.h:10,
from include/linux/writeback.h:13,
from include/linux/memcontrol.h:23,
from include/linux/swap.h:9,
from include/linux/suspend.h:5,
from arch/arm/mach-highbank/pm.c:9:
include/linux/highmem-internal.h: In function 'kmap_local_folio':
include/linux/highmem-internal.h:86:46: warning: passing argument 1 of 'folio_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
86 | const struct page *page = folio_page(folio, offset / PAGE_SIZE);
| ^~~~~
In file included from include/linux/mmzone.h:23,
from include/linux/swap.h:7:
include/linux/page-flags.h:319:53: note: expected 'struct folio *' but argument is of type 'const struct folio *'
319 | static inline struct page *folio_page(struct folio *folio, unsigned long n)
| ~~~~~~~~~~~~~~^~~~~
And 5.5MB more :-(
Introduced by commit
598ad57d4b46 ("mm: constify highmem related functions for improved const-correctness")
I have reverted that commit for today.
--
Cheers,
Stephen Rothwell
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