linux-kernel - [t-kristo-pm:usi-5.16-rfc-v2-bpf 5/30] drivers/hid/hid-bpf.c:94:5: warning: no previous prototype for function 'hid_bpf_prog

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Message-ID: <202111270158.8DdFxp1c-lkp@intel.com>
Date:   Sat, 27 Nov 2021 01:51:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Tero Kristo <tero.kristo@...ux.intel.com>
Subject: [t-kristo-pm:usi-5.16-rfc-v2-bpf 5/30] drivers/hid/hid-bpf.c:94:5:
 warning: no previous prototype for function 'hid_bpf_prog_detach'

tree:   https://github.com/t-kristo/linux-pm usi-5.16-rfc-v2-bpf
head:   241207b4769fca049dfcc4dbde0bda92e4f67027
commit: 1995666cad0e362400a48617c5486a2a04f4d158 [5/30] HID: initial BPF implementation
config: hexagon-buildonly-randconfig-r002-20211126 (https://download.01.org/0day-ci/archive/20211127/202111270158.8DdFxp1c-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5162b558d8c0b542e752b037e72a69d5fd51eb1e)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/t-kristo/linux-pm/commit/1995666cad0e362400a48617c5486a2a04f4d158
        git remote add t-kristo-pm https://github.com/t-kristo/linux-pm
        git fetch --no-tags t-kristo-pm usi-5.16-rfc-v2-bpf
        git checkout 1995666cad0e362400a48617c5486a2a04f4d158
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/hid/

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 >>):

>> drivers/hid/hid-bpf.c:94:5: warning: no previous prototype for function 'hid_bpf_prog_detach' [-Wmissing-prototypes]
   int hid_bpf_prog_detach(struct hid_device *hdev, struct bpf_prog *prog)
       ^
   drivers/hid/hid-bpf.c:94:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int hid_bpf_prog_detach(struct hid_device *hdev, struct bpf_prog *prog)
   ^
   static 
   1 warning generated.


vim +/hid_bpf_prog_detach +94 drivers/hid/hid-bpf.c

    93	
  > 94	int hid_bpf_prog_detach(struct hid_device *hdev, struct bpf_prog *prog)
    95	{
    96		switch(prog->expected_attach_type) {
    97		case BPF_HID_RAW_EVENT:
    98			return __hid_bpf_prog_detach(hdev, &hdev->bpf.event_progs, prog);
    99		default:
   100			return -EINVAL;
   101		}
   102	
   103		return -EINVAL;
   104	}
   105	

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