linux-kernel - arch/x86/net/bpf_jit_comp.c:1647:5: warning: no previous prototype for 'arch_prepare_bpf

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Date:   Wed, 8 Jul 2020 14:11:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     Björn Töpel <bjorn.topel@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>
Subject: arch/x86/net/bpf_jit_comp.c:1647:5: warning: no previous prototype
 for 'arch_prepare_bpf_dispatcher'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dcde237b9b0eb1d19306e6f48c0a4e058907619f
commit: 75ccbef6369e94ecac696a152a998a978d41376b bpf: Introduce BPF dispatcher
date:   7 months ago
config: x86_64-randconfig-r014-20200707 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce (this is a W=1 build):
        git checkout 75ccbef6369e94ecac696a152a998a978d41376b
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/net/bpf_jit_comp.c:1647:5: warning: no previous prototype for 'arch_prepare_bpf_dispatcher' [-Wmissing-prototypes]
    1647 | int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/arch_prepare_bpf_dispatcher +1647 arch/x86/net/bpf_jit_comp.c

  1646	
> 1647	int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs)
  1648	{
  1649		u8 *prog = image;
  1650	
  1651		sort(funcs, num_funcs, sizeof(funcs[0]), cmp_ips, NULL);
  1652		return emit_bpf_dispatcher(&prog, 0, num_funcs - 1, funcs);
  1653	}
  1654	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (28201 bytes)