[ast:fexit_fix 2/2] kernel/bpf/trampoline.c:199:30: warning: no previous prototype for function 'bpf_trampoline_image_alloc'

[ast:fexit_fix 2/2] kernel/bpf/trampoline.c:199:30: warning: no previous prototype for function 'bpf_trampoline_image_alloc'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git fexit_fix
head:   d0953e3c28d70fa9d39e6db07d2cffbe7ce1f0e2
commit: d0953e3c28d70fa9d39e6db07d2cffbe7ce1f0e2 [2/2] bpf: Fix fexit trampoline.
config: x86_64-randconfig-a001-20210312 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project dfd27ebbd0eb137c9a439b7c537bb87ba903efd3)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git/commit/?id=d0953e3c28d70fa9d39e6db07d2cffbe7ce1f0e2
        git remote add ast https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git
        git fetch --no-tags ast fexit_fix
        git checkout d0953e3c28d70fa9d39e6db07d2cffbe7ce1f0e2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>):

>> kernel/bpf/trampoline.c:199:30: warning: no previous prototype for function 'bpf_trampoline_image_alloc' [-Wmissing-prototypes]
   struct bpf_trampoline_image *bpf_trampoline_image_alloc(u64 key, u32 idx)
                                ^
   kernel/bpf/trampoline.c:199:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct bpf_trampoline_image *bpf_trampoline_image_alloc(u64 key, u32 idx)
   ^
   static 
   1 warning generated.


vim +/bpf_trampoline_image_alloc +199 kernel/bpf/trampoline.c

   198	
 > 199	struct bpf_trampoline_image *bpf_trampoline_image_alloc(u64 key, u32 idx)
   200	{
   201		struct bpf_trampoline_image *im;
   202		struct bpf_ksym *ksym;
   203		void *image;
   204		int err = -ENOMEM;
   205	
   206		im = kzalloc(sizeof(*im), GFP_KERNEL);
   207		if (!im)
   208			goto out;
   209	
   210		err = bpf_jit_charge_modmem(1);
   211		if (err)
   212			goto out_free_im;
   213	
   214		err = -ENOMEM;
   215		im->image = image = bpf_jit_alloc_exec_page();
   216		if (!image)
   217			goto out_uncharge;
   218	
   219		ksym = &im->ksym;
   220		INIT_LIST_HEAD_RCU(&ksym->lnode);
   221		snprintf(ksym->name, KSYM_NAME_LEN, "bpf_trampoline_%llu_%u", key, idx);
   222		bpf_image_ksym_add(image, ksym);
   223		return im;
   224	
   225	out_uncharge:
   226		bpf_jit_uncharge_modmem(1);
   227	out_free_im:
   228		kfree(im);
   229	out:
   230		return ERR_PTR(err);
   231	}
   232	

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

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