linux-kernel - Re: [PATCH v8 bpf-next 5/7] bpf: Use btf_kfunc_id_set.remap logic for bpf_dynptr_from

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Message-ID: <CAPhsuW4xKCeZ9GoeVHx47GiTbwCU=b7G3orkcULOq7aH5TKo9Q@mail.gmail.com>
Date: Thu, 9 Jan 2025 17:08:37 -0800
From: Song Liu <song@...nel.org>
To: kernel test robot <lkp@...el.com>
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-security-module@...r.kernel.org, oe-kbuild-all@...ts.linux.dev, 
	kernel-team@...a.com, andrii@...nel.org, ast@...nel.org, daniel@...earbox.net, 
	martin.lau@...ux.dev, kpsingh@...nel.org, mattbobrowski@...gle.com, 
	paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com, memxor@...il.com
Subject: Re: [PATCH v8 bpf-next 5/7] bpf: Use btf_kfunc_id_set.remap logic for bpf_dynptr_from_skb

On Thu, Jan 9, 2025 at 3:56 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi Song,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on bpf-next/master]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Song-Liu/fs-xattr-bpf-Introduce-security-bpf-xattr-name-prefix/20250109-065503
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
> patch link:    https://lore.kernel.org/r/20250108225140.3467654-6-song%40kernel.org
> patch subject: [PATCH v8 bpf-next 5/7] bpf: Use btf_kfunc_id_set.remap logic for bpf_dynptr_from_skb
> config: i386-buildonly-randconfig-005-20250110 (https://download.01.org/0day-ci/archive/20250110/202501100757.HDb5slrv-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250110/202501100757.HDb5slrv-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202501100757.HDb5slrv-lkp@intel.com/
>
> All error/warnings (new ones prefixed by >>):
>
> >> net/core/filter.c:12071:1: error: return type defaults to 'int' [-Werror=implicit-int]
>    12071 | BTF_HIDDEN_KFUNCS_START(bpf_kfunc_check_hidden_set_skb)
>          | ^~~~~~~~~~~~~~~~~~~~~~~

Good catch.. Fixing this in v9.

Thanks,
Song