Re: [PATCH v3 2/6] sign-file: move file signing logic to its own function

[kernel test robot]

Hi Shreenidhi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.2-rc8 next-20230216]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Shreenidhi-Shedi/sign-file-move-file-signing-logic-to-its-own-function/20230214-030302
patch link:    https://lore.kernel.org/r/20230213190034.57097-2-sshedi%40vmware.com
patch subject: [PATCH v3 2/6] sign-file: move file signing logic to its own function
config: riscv-randconfig-r042-20230213 (https://download.01.org/0day-ci/archive/20230216/202302162229.XFMtVABh-lkp@xxxxxxxxx/config)
compiler: riscv64-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/1dfab8ead8d3f9c0c04eeeaf7c436a2878f2158e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Shreenidhi-Shedi/sign-file-move-file-signing-logic-to-its-own-function/20230214-030302
        git checkout 1dfab8ead8d3f9c0c04eeeaf7c436a2878f2158e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv prepare

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202302162229.XFMtVABh-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> scripts/sign-file.c:318:5: warning: no previous prototype for 'sign_file' [-Wmissing-prototypes]
     318 | int sign_file(int argc, char **argv, struct cmd_opts *opts)
         |     ^~~~~~~~~
   scripts/sign-file.c: In function 'sign_file':
   scripts/sign-file.c:333:13: warning: unused variable 'i' [-Wunused-variable]
     333 |         int i, n;
         |             ^
--
>> scripts/sign-file.c:318:5: warning: no previous prototype for 'sign_file' [-Wmissing-prototypes]
     318 | int sign_file(int argc, char **argv, struct cmd_opts *opts)
         |     ^~~~~~~~~
   scripts/sign-file.c: In function 'sign_file':
   scripts/sign-file.c:333:13: warning: unused variable 'i' [-Wunused-variable]
     333 |         int i, n;
         |             ^


vim +/sign_file +318 scripts/sign-file.c

   317	
 > 318	int sign_file(int argc, char **argv, struct cmd_opts *opts)
   319	{
   320		struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
   321		unsigned char buf[4096] = {0};
   322		unsigned long module_size, sig_size;
   323		unsigned int use_signed_attrs;
   324		const EVP_MD *digest_algo;
   325		EVP_PKEY *private_key;
   326	#ifndef USE_PKCS7
   327		CMS_ContentInfo *cms = NULL;
   328	#else
   329		PKCS7 *pkcs7 = NULL;
   330	#endif
   331		X509 *x509;
   332		BIO *bd, *bm;
   333		int i, n;
   334	
   335		char *hash_algo = opts->hash_algo;
   336		char *dest_name = opts->dest_name;
   337		char *private_key_name = opts->private_key_name;
   338		char *raw_sig_name = opts->raw_sig_name;
   339		char *x509_name = opts->x509_name;
   340		char *module_name = opts->module_name;
   341		bool save_sig = opts->save_sig;
   342		bool replace_orig = opts->replace_orig;
   343		bool raw_sig = opts->raw_sig;
   344		bool sign_only = opts->sign_only;
   345	

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