Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 25 May 2022 15:54:01 +1000
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     Zi Yan <ziy@nvidia.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: linux-next: build warning after merge of the mm tree
Message-ID: <20220525155401.4a72ad6b@canb.auug.org.au>
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="Sig_/p47KAp=X2rUrBmKDYgqim=L";
 protocol="application/pgp-signature"; micalg=pgp-sha256
Precedence: bulk

--Sig_/p47KAp=X2rUrBmKDYgqim=L
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable

Hi all,

After merging the mm tree, today's linux-next build (sparc64 defconfig)
produced this warning:

In file included from include/linux/kernel.h:26,
                 from include/linux/cpumask.h:10,
                 from include/linux/smp.h:13,
                 from include/linux/lockdep.h:14,
                 from include/linux/spinlock.h:62,
                 from include/linux/mmzone.h:8,
                 from include/linux/gfp.h:6,
                 from include/linux/mm.h:7,
                 from mm/page_alloc.c:19:
mm/page_alloc.c: In function 'split_free_page':
include/linux/minmax.h:20:35: warning: comparison of distinct pointer types=
 lacks a cast
   20 |         (!!(sizeof((typeof(x) *)1 =3D=3D (typeof(y) *)1)))
      |                                   ^~
include/linux/minmax.h:26:18: note: in expansion of macro '__typecheck'
   26 |                 (__typecheck(x, y) && __no_side_effects(x, y))
      |                  ^~~~~~~~~~~
include/linux/minmax.h:36:31: note: in expansion of macro '__safe_cmp'
   36 |         __builtin_choose_expr(__safe_cmp(x, y), \
      |                               ^~~~~~~~~~
include/linux/minmax.h:45:25: note: in expansion of macro '__careful_cmp'
   45 | #define min(x, y)       __careful_cmp(x, y, <)
      |                         ^~~~~~~~~~~~~
mm/page_alloc.c:1138:35: note: in expansion of macro 'min'
 1138 |                 free_page_order =3D min(pfn ? __ffs(pfn) : order, _=
_fls(split_pfn_offset));
      |                                   ^~~

Introduced by commit

  29a8af92b874 ("mm: fix a potential infinite loop in start_isolate_page_ra=
nge()")

--=20
Cheers,
Stephen Rothwell

--Sig_/p47KAp=X2rUrBmKDYgqim=L
Content-Type: application/pgp-signature
Content-Description: OpenPGP digital signature

-----BEGIN PGP SIGNATURE-----

iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAmKNxHkACgkQAVBC80lX
0Gx4Bgf/fgDGYlI3+zGK6/1/HwSaVZ8hZL3yS1wsvFbWqEd4qLoqKLa54ROAyOZN
2MgoYiJbhJIEzib+qQ5zPk8P1at26TB+z2NdRWyMp4CPjkc1bBohGKwyiN4ztKXj
Q/miuywV5Am0gWgYO7ddisZ5ivxjvVFXnWVFTB79IvYDnatUgfU94nq7WPNytudQ
VKesXGr9GNcHlqvT5mPZ4aj20tVRcL96KKHN5nE35N3wPA1zPLmuk9D/yb2pTLYf
DKWQEryiKAtePxwCnXT/VIODAVcUh40YTVkQ/m/fK6a50x3YRZwgqu/CoeBoGocK
jhAb7u7XhqHLPSdkXUM10W2h5p0mIw==
=NJNq
-----END PGP SIGNATURE-----

--Sig_/p47KAp=X2rUrBmKDYgqim=L--