From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD01621D58E; Thu, 19 Dec 2024 12:40:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734612007; cv=none; b=fu60cfKUwaBP6bpu6neczVjXHu9hha80C26LCtZcLxtt5uJTRDdo4qvPdZhDE11AVIG6PfMcetKs4CQ6G00tTw3+rssIJebicj+lnwxq3xwxPCM9Erz0GtobOwIgLj6fKXo0dDwc/+BdPGX4HPAbqFqnfEkHMY/UGe+DiTswEkA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734612007; c=relaxed/simple; bh=vAeh6cNL9PvY1oz9xuKWI9WJmIOZj0lQaglVhx8H4rE=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=RWiosUpXKTMxfQ8rVZ8/90gPcBkEcoV+oGgFpSU3MQfKhS97TZobZ1Vv3kzV+Q3S/8XcY4OtDXxtOVCfMxBPCieX3WvG0itd3HETJog73u82C3RaPd9CWDtbjWz5F2rgQAOyL9amEx3yMtSl8QKSAL8NAH3EVuOEPlowwwjJPQ0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jKIQc6FS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jKIQc6FS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D09FDC4CECE; Thu, 19 Dec 2024 12:40:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734612007; bh=vAeh6cNL9PvY1oz9xuKWI9WJmIOZj0lQaglVhx8H4rE=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=jKIQc6FS8w5Ol2Pt9kNTAK+ERmu8m4z+Fb1VoRzscO7A7HGtbkL0rRdntv/Fr6/t5 NFbb4UhhiGgR9CpZZZVtlIMghYfwymmVUg6o+tUveBNOUqdAZxw0rpR9JoBw7x/L6n csbQwgPDcJUEIm+/bXPxKSMkJVyhMLY79yNM8W6hGq8MLTYM+0DuXbsTWa5qUceVIm Gf77NPgaCSGSAVVDqydGE9kGoTfNgqvmsaN09/ptRc1d9zGBVj+E8tQSD64nCEP7It JCH9ubK4vhLH+uLlLV2XXJc6kxWBrBlsHjj7dJ5V79zxW7ANlN/1b1P/IyG6xgEd7g DkpKqcuBz0fhQ== Message-ID: Subject: Re: linux-next: build warnings after merge of the vfs-brauner tree From: Jeff Layton To: Stephen Rothwell , Christian Brauner Cc: Linux Kernel Mailing List , Linux Next Mailing List Date: Thu, 19 Dec 2024 07:40:05 -0500 In-Reply-To: <20241219173156.7dce2f07@canb.auug.org.au> References: <20241211143701.5cfc95a7@canb.auug.org.au> <20241219173156.7dce2f07@canb.auug.org.au> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 0OX6MYPtv76hka8lW4mnRmZqqx3UtfHX/hF/zH24Gj7A6sYKYLCU3YrI2Ogiu7/ksKcl7goQjpvtV 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the vfs-brauner tree, today's linux-next build (powerpc > > allyesconfig) produced these warnings: > >=20 > > samples/vfs/mountinfo.c: In function 'show_propagation': > > samples/vfs/mountinfo.c:104:36: warning: format '%llu' expects argument= of type 'long long unsigned int', but argument 2 has type '__u64' {aka 'lo= ng unsigned int'} [-Wformat=3D] > > 104 | printf(" shared:%llu", sm->mnt_peer_group); > > | ~~~^ ~~~~~~~~~~~~~~~~~~ > > | | | > > | | __u64 {aka long unsign= ed int} > > | long long unsigned int > > | %lu > > samples/vfs/mountinfo.c:106:36: warning: format '%llu' expects argument= of type 'long long unsigned int', but argument 2 has type '__u64' {aka 'lo= ng unsigned int'} [-Wformat=3D] > > 106 | printf(" master:%llu", sm->mnt_master); > > | ~~~^ ~~~~~~~~~~~~~~ > > | | | > > | | __u64 {aka long unsign= ed int} > > | long long unsigned int > > | %lu > > samples/vfs/mountinfo.c:108:52: warning: format '%llu' expects argument= of type 'long long unsigned int', but argument 2 has type '__u64' {aka 'lo= ng unsigned int'} [-Wformat=3D] > > 108 | printf(" propagate_from:%llu", sm->prop= agate_from); > > | ~~~^ ~~~~~~~~= ~~~~~~~~~~ > > | | | > > | | __u64 = {aka long unsigned int} > > | long long un= signed int > > | %lu > > samples/vfs/mountinfo.c: In function 'dump_mountinfo': > > samples/vfs/mountinfo.c:144:42: warning: format '%llx' expects argument= of type 'long long unsigned int', but argument 4 has type '__u64' {aka 'lo= ng unsigned int'} [-Wformat=3D] > > 144 | printf("0x%lx 0x%lx 0x%llx ", mnt_ns_id, mnt_id= , buf->mnt_parent_id); > > | ~~~^ = ~~~~~~~~~~~~~~~~~~ > > | | = | > > | long long unsigned int= __u64 {aka long unsigned int} > > | %lx > >=20 > > Introduced by commits > >=20 > > 0c8f746452aa ("samples: add a mountinfo program to demonstrate statmo= unt()/listmount()") > > ee8c840a4a35 ("samples: fix missing nodiratime option and handle prop= agate_from correctly") > >=20 > > I am not sure why these warnings only turned up today. >=20 > I am still seeing these warnings. I'm not sure how to fix this the right way. The problem seems to be a discrepancy in the __u64 type between arches. Changing these in a way that would make PPC happy causes these warnings on x86_64: gcc -Wp,-MMD,./.mountinfo.d -Wall -Wmissing-prototypes -Wstrict-prototyp= es -O2 -fomit-frame-pointer -std=3Dgnu11 -m64 -I usr/include -m64 -o mo= untinfo mountinfo.c =20 mountinfo.c: In function =E2=80=98show_propagation=E2=80=99: mountinfo.c:104:35: warning: format =E2=80=98%lu=E2=80=99 expects argument = of type =E2=80=98long unsigned int=E2=80=99, but argument 2 has type =E2=80= =98__u64=E2=80=99 {aka =E2=80=98long long unsigned int=E2=80=99} [-Wformat= =3D] 104 | printf(" shared:%lu", sm->mnt_peer_group); | ~~^ ~~~~~~~~~~~~~~~~~~ | | | | | __u64 {aka long long unsign= ed int} | long unsigned int | %llu mountinfo.c:106:35: warning: format =E2=80=98%lu=E2=80=99 expects argument = of type =E2=80=98long unsigned int=E2=80=99, but argument 2 has type =E2=80= =98__u64=E2=80=99 {aka =E2=80=98long long unsigned int=E2=80=99} [-Wformat= =3D] 106 | printf(" master:%lu", sm->mnt_master); | ~~^ ~~~~~~~~~~~~~~ | | | | | __u64 {aka long long unsign= ed int} | long unsigned int | %llu mountinfo.c:108:51: warning: format =E2=80=98%lu=E2=80=99 expects argument = of type =E2=80=98long unsigned int=E2=80=99, but argument 2 has type =E2=80= =98__u64=E2=80=99 {aka =E2=80=98long long unsigned int=E2=80=99} [-Wformat= =3D] 108 | printf(" propagate_from:%lu", sm->propagate= _from); | ~~^ ~~~~~~~~~~~~~= ~~~~~ | | | | | __u64 {aka = long long unsigned int} | long unsigned int | %llu mountinfo.c: In function =E2=80=98dump_mountinfo=E2=80=99: mountinfo.c:144:41: warning: format =E2=80=98%lx=E2=80=99 expects argument = of type =E2=80=98long unsigned int=E2=80=99, but argument 4 has type =E2=80= =98__u64=E2=80=99 {aka =E2=80=98long long unsigned int=E2=80=99} [-Wformat= =3D] 144 | printf("0x%lx 0x%lx 0x%lx ", mnt_ns_id, mnt_id, buf= ->mnt_parent_id); | ~~^ ~~~= ~~~~~~~~~~~~~~~ | | = | | long unsigned int = __u64 {aka long long unsigned int} | %llx What format specifier should we be using that would make both arches happy? Thanks, --=20 Jeff Layton