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Subjectarch/x86/net/bpf_jit_comp.c:1647:5: warning: no previous prototype for 'arch_prepare_bpf_dispatcher'
Hi Björn,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: fd0aa1a4567d0f09e1bfe367a950b004f99ac290
commit: 75ccbef6369e94ecac696a152a998a978d41376b bpf: Introduce BPF dispatcher
date: 1 year, 6 months ago
config: x86_64-randconfig-r023-20210618 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75ccbef6369e94ecac696a152a998a978d41376b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
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@intel.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
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