linux-kernel - net/core/filter.c:11662:17: error: no previous declaration for 'bpf_dynptr_from

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Date:   Sat, 23 Sep 2023 08:49:02 +0800
From:   kernel test robot <lkp@...el.com>
To:     Joanne Koong <joannelkoong@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>
Subject: net/core/filter.c:11662:17: error: no previous declaration for
 'bpf_dynptr_from_xdp'

Hi Joanne,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d90b0276af8f25a0b8ae081a30d1b2a61263393b
commit: 05421aecd4ed65da0dc17b0c3c13779ef334e9e5 bpf: Add xdp dynptrs
date:   7 months ago
config: x86_64-sof-customedconfig-avs-defconfig (https://download.01.org/0day-ci/archive/20230923/202309230815.jkPv5f5j-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230923/202309230815.jkPv5f5j-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/202309230815.jkPv5f5j-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/core/filter.c:11649:17: error: no previous declaration for 'bpf_dynptr_from_skb' [-Werror=missing-declarations]
    __bpf_kfunc int bpf_dynptr_from_skb(struct sk_buff *skb, u64 flags,
                    ^~~~~~~~~~~~~~~~~~~
>> net/core/filter.c:11662:17: error: no previous declaration for 'bpf_dynptr_from_xdp' [-Werror=missing-declarations]
    __bpf_kfunc int bpf_dynptr_from_xdp(struct xdp_buff *xdp, u64 flags,
                    ^~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/bpf_dynptr_from_xdp +11662 net/core/filter.c

 11645	
 11646	__diag_push();
 11647	__diag_ignore_all("-Wmissing-prototypes",
 11648			  "Global functions as their definitions will be in vmlinux BTF");
 11649	__bpf_kfunc int bpf_dynptr_from_skb(struct sk_buff *skb, u64 flags,
 11650					    struct bpf_dynptr_kern *ptr__uninit)
 11651	{
 11652		if (flags) {
 11653			bpf_dynptr_set_null(ptr__uninit);
 11654			return -EINVAL;
 11655		}
 11656	
 11657		bpf_dynptr_init(ptr__uninit, skb, BPF_DYNPTR_TYPE_SKB, 0, skb->len);
 11658	
 11659		return 0;
 11660	}
 11661	
 11662	__bpf_kfunc int bpf_dynptr_from_xdp(struct xdp_buff *xdp, u64 flags,
 11663					    struct bpf_dynptr_kern *ptr__uninit)
 11664	{
 11665		if (flags) {
 11666			bpf_dynptr_set_null(ptr__uninit);
 11667			return -EINVAL;
 11668		}
 11669	
 11670		bpf_dynptr_init(ptr__uninit, xdp, BPF_DYNPTR_TYPE_XDP, 0, xdp_get_buff_len(xdp));
 11671	
 11672		return 0;
 11673	}
 11674	__diag_pop();
 11675	

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