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Message-ID: <202309142315.XvcXo6j1-lkp@intel.com>
Date:   Thu, 14 Sep 2023 23:28:17 +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,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Subject: kernel/bpf/helpers.c:2325:18: warning: no previous declaration for
 'bpf_dynptr_is_null'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   aed8aee11130a954356200afa3f1b8753e8a9482
commit: 540ccf96ddbc173474c32e595787d5622253be3d bpf: Add bpf_dynptr_is_null and bpf_dynptr_is_rdonly
date:   5 months ago
config: x86_64-randconfig-002-20230910 (https://download.01.org/0day-ci/archive/20230914/202309142315.XvcXo6j1-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/20230914/202309142315.XvcXo6j1-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/202309142315.XvcXo6j1-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf/helpers.c:1889:19: warning: no previous declaration for 'bpf_obj_new_impl' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_obj_new_impl(u64 local_type_id__k, void *meta__ign)
                      ^~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:1919:18: warning: no previous declaration for 'bpf_obj_drop_impl' [-Wmissing-declarations]
    __bpf_kfunc void bpf_obj_drop_impl(void *p__alloc, void *meta__ign)
                     ^~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:1927:19: warning: no previous declaration for 'bpf_refcount_acquire_impl' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_refcount_acquire_impl(void *p__refcounted_kptr, void *meta__ign)
                      ^~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:1962:17: warning: no previous declaration for 'bpf_list_push_front_impl' [-Wmissing-declarations]
    __bpf_kfunc int bpf_list_push_front_impl(struct bpf_list_head *head,
                    ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:1972:17: warning: no previous declaration for 'bpf_list_push_back_impl' [-Wmissing-declarations]
    __bpf_kfunc int bpf_list_push_back_impl(struct bpf_list_head *head,
                    ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:1998:35: warning: no previous declaration for 'bpf_list_pop_front' [-Wmissing-declarations]
    __bpf_kfunc struct bpf_list_node *bpf_list_pop_front(struct bpf_list_head *head)
                                      ^~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2003:35: warning: no previous declaration for 'bpf_list_pop_back' [-Wmissing-declarations]
    __bpf_kfunc struct bpf_list_node *bpf_list_pop_back(struct bpf_list_head *head)
                                      ^~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2008:33: warning: no previous declaration for 'bpf_rbtree_remove' [-Wmissing-declarations]
    __bpf_kfunc struct bpf_rb_node *bpf_rbtree_remove(struct bpf_rb_root *root,
                                    ^~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2054:17: warning: no previous declaration for 'bpf_rbtree_add_impl' [-Wmissing-declarations]
    __bpf_kfunc int bpf_rbtree_add_impl(struct bpf_rb_root *root, struct bpf_rb_node *node,
                    ^~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2063:33: warning: no previous declaration for 'bpf_rbtree_first' [-Wmissing-declarations]
    __bpf_kfunc struct bpf_rb_node *bpf_rbtree_first(struct bpf_rb_root *root)
                                    ^~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2076:33: warning: no previous declaration for 'bpf_task_acquire' [-Wmissing-declarations]
    __bpf_kfunc struct task_struct *bpf_task_acquire(struct task_struct *p)
                                    ^~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2087:18: warning: no previous declaration for 'bpf_task_release' [-Wmissing-declarations]
    __bpf_kfunc void bpf_task_release(struct task_struct *p)
                     ^~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2099:28: warning: no previous declaration for 'bpf_cgroup_acquire' [-Wmissing-declarations]
    __bpf_kfunc struct cgroup *bpf_cgroup_acquire(struct cgroup *cgrp)
                               ^~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2111:18: warning: no previous declaration for 'bpf_cgroup_release' [-Wmissing-declarations]
    __bpf_kfunc void bpf_cgroup_release(struct cgroup *cgrp)
                     ^~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2123:28: warning: no previous declaration for 'bpf_cgroup_ancestor' [-Wmissing-declarations]
    __bpf_kfunc struct cgroup *bpf_cgroup_ancestor(struct cgroup *cgrp, int level)
                               ^~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2143:28: warning: no previous declaration for 'bpf_cgroup_from_id' [-Wmissing-declarations]
    __bpf_kfunc struct cgroup *bpf_cgroup_from_id(u64 cgid)
                               ^~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2160:33: warning: no previous declaration for 'bpf_task_from_pid' [-Wmissing-declarations]
    __bpf_kfunc struct task_struct *bpf_task_from_pid(s32 pid)
                                    ^~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2199:19: warning: no previous declaration for 'bpf_dynptr_slice' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_dynptr_slice(const struct bpf_dynptr_kern *ptr, u32 offset,
                      ^~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2276:19: warning: no previous declaration for 'bpf_dynptr_slice_rdwr' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_dynptr_slice_rdwr(const struct bpf_dynptr_kern *ptr, u32 offset,
                      ^~~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2307:17: warning: no previous declaration for 'bpf_dynptr_adjust' [-Wmissing-declarations]
    __bpf_kfunc int bpf_dynptr_adjust(struct bpf_dynptr_kern *ptr, u32 start, u32 end)
                    ^~~~~~~~~~~~~~~~~
>> kernel/bpf/helpers.c:2325:18: warning: no previous declaration for 'bpf_dynptr_is_null' [-Wmissing-declarations]
    __bpf_kfunc bool bpf_dynptr_is_null(struct bpf_dynptr_kern *ptr)
                     ^~~~~~~~~~~~~~~~~~
>> kernel/bpf/helpers.c:2330:18: warning: no previous declaration for 'bpf_dynptr_is_rdonly' [-Wmissing-declarations]
    __bpf_kfunc bool bpf_dynptr_is_rdonly(struct bpf_dynptr_kern *ptr)
                     ^~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2338:19: warning: no previous declaration for 'bpf_cast_to_kern_ctx' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_cast_to_kern_ctx(void *obj)
                      ^~~~~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2343:19: warning: no previous declaration for 'bpf_rdonly_cast' [-Wmissing-declarations]
    __bpf_kfunc void *bpf_rdonly_cast(void *obj__ign, u32 btf_id__k)
                      ^~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2348:18: warning: no previous declaration for 'bpf_rcu_read_lock' [-Wmissing-declarations]
    __bpf_kfunc void bpf_rcu_read_lock(void)
                     ^~~~~~~~~~~~~~~~~
   kernel/bpf/helpers.c:2353:18: warning: no previous declaration for 'bpf_rcu_read_unlock' [-Wmissing-declarations]
    __bpf_kfunc void bpf_rcu_read_unlock(void)
                     ^~~~~~~~~~~~~~~~~~~


vim +/bpf_dynptr_is_null +2325 kernel/bpf/helpers.c

  2324	
> 2325	__bpf_kfunc bool bpf_dynptr_is_null(struct bpf_dynptr_kern *ptr)
  2326	{
  2327		return !ptr->data;
  2328	}
  2329	
> 2330	__bpf_kfunc bool bpf_dynptr_is_rdonly(struct bpf_dynptr_kern *ptr)
  2331	{
  2332		if (!ptr->data)
  2333			return false;
  2334	
  2335		return __bpf_dynptr_is_rdonly(ptr);
  2336	}
  2337	

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

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