linux-kernel - kernel/bpf/helpers.c:1757:7: warning: no previous declaration for 'bpf_obj_new

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Message-ID: <202308162255.nWBAw9u6-lkp@intel.com>
Date:   Wed, 16 Aug 2023 23:01:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kumar Kartikeya Dwivedi <memxor@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>
Subject: kernel/bpf/helpers.c:1757:7: warning: no previous declaration for
 'bpf_obj_new_impl'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6
commit: 958cf2e273f0929c66169e0788031310e8118722 bpf: Introduce bpf_obj_new
date:   9 months ago
config: x86_64-randconfig-x012-20230816 (https://download.01.org/0day-ci/archive/20230816/202308162255.nWBAw9u6-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce: (https://download.01.org/0day-ci/archive/20230816/202308162255.nWBAw9u6-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/202308162255.nWBAw9u6-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/bpf/helpers.c:1757:7: warning: no previous declaration for 'bpf_obj_new_impl' [-Wmissing-declarations]
    void *bpf_obj_new_impl(u64 local_type_id__k, void *meta__ign)
          ^~~~~~~~~~~~~~~~


vim +/bpf_obj_new_impl +1757 kernel/bpf/helpers.c

  1752	
  1753	__diag_push();
  1754	__diag_ignore_all("-Wmissing-prototypes",
  1755			  "Global functions as their definitions will be in vmlinux BTF");
  1756	
> 1757	void *bpf_obj_new_impl(u64 local_type_id__k, void *meta__ign)
  1758	{
  1759		struct btf_struct_meta *meta = meta__ign;
  1760		u64 size = local_type_id__k;
  1761		void *p;
  1762	
  1763		if (unlikely(!bpf_global_ma_set))
  1764			return NULL;
  1765		p = bpf_mem_alloc(&bpf_global_ma, size);
  1766		if (!p)
  1767			return NULL;
  1768		if (meta)
  1769			bpf_obj_init(meta->field_offs, p);
  1770		return p;
  1771	}
  1772	

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