linux-kernel - Re: [PATCH bpf-next 2/2] bpf: Add BPF_CALL

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Message-ID: <202409210926.ErxhBmi5-lkp@intel.com>
Date: Sat, 21 Sep 2024 09:21:36 +0800
From: kernel test robot <lkp@...el.com>
To: Tao Chen <chen.dylane@...il.com>, Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	John Fastabend <john.fastabend@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H . Peter Anvin" <hpa@...or.com>
Cc: oe-kbuild-all@...ts.linux.dev, bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
	Tao Chen <chen.dylane@...il.com>
Subject: Re: [PATCH bpf-next 2/2] bpf: Add BPF_CALL_FUNC* to simplify code

Hi Tao,

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/Tao-Chen/bpf-Add-BPF_CALL_FUNC-to-simplify-code/20240920-233936
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20240920153706.919154-1-chen.dylane%40gmail.com
patch subject: [PATCH bpf-next 2/2] bpf: Add BPF_CALL_FUNC* to simplify code
config: openrisc-defconfig (https://download.01.org/0day-ci/archive/20240921/202409210926.ErxhBmi5-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240921/202409210926.ErxhBmi5-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/202409210926.ErxhBmi5-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/bpf/core.c:21:
   kernel/bpf/core.c: In function '___bpf_prog_run':
>> include/linux/filter.h:464:38: error: called object is not a function or function pointer
     464 | #define BPF_CALL_FUNC(x)        ((x) + (u8 *)__bpf_call_base)
         |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/core.c:2010:26: note: in expansion of macro 'BPF_CALL_FUNC'
    2010 |                 BPF_R0 = BPF_CALL_FUNC(insn->imm)(BPF_R1, BPF_R2, BPF_R3,
         |                          ^~~~~~~~~~~~~
   include/linux/filter.h:466:38: error: called object is not a function or function pointer
     466 | #define BPF_CALL_FUNC_ARGS(x)   ((x) + (u8 *)__bpf_call_base_args)
         |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/core.c:2015:26: note: in expansion of macro 'BPF_CALL_FUNC_ARGS'
    2015 |                 BPF_R0 = BPF_CALL_FUNC_ARGS(insn->imm)(BPF_R1, BPF_R2,
         |                          ^~~~~~~~~~~~~~~~~~


vim +464 include/linux/filter.h

   463	
 > 464	#define BPF_CALL_FUNC(x)	((x) + (u8 *)__bpf_call_base)
   465	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki