Hi Pratyush,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on next-20221026]
[cannot apply to bpf-next/master bpf/master linus/master v6.1-rc2 v6.1-rc1 v6.0 v6.1-rc2]
[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/Pratyush-Kumar-Khan/kParser-Add-new-kParser-KMOD/20221026-165116
patch link:    https://lore.kernel.org/r/20221026075054.119069-4-pratyush%40sipanda.io
patch subject: [RFC PATCH 3/4] xdp: Support for kParser as bpf helper function
config: m68k-allyesconfig
compiler: m68k-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/68a7f009f159f30d492393caa868d0a168dfa95d
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Pratyush-Kumar-Khan/kParser-Add-new-kParser-KMOD/20221026-165116
        git checkout 68a7f009f159f30d492393caa868d0a168dfa95d
        # 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=m68k SHELL=/bin/bash net/core/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> net/core/filter.c:3995:5: warning: no previous prototype for 'kparser_xdp_parse' [-Wmissing-prototypes]
    3995 | int kparser_xdp_parse(struct xdp_buff *xdp, void *conf, size_t conf_len,
         |     ^~~~~~~~~~~~~~~~~
   net/core/filter.c: In function '____bpf_xdp_kparser':
>> net/core/filter.c:4054:13: warning: variable 'err' set but not used [-Wunused-but-set-variable]
    4054 |         int err;
         |             ^~~
>> net/core/filter.c:4053:13: warning: variable 'len1' set but not used [-Wunused-but-set-variable]
    4053 |         int len1;
         |             ^~~~


vim +/kparser_xdp_parse +3995 net/core/filter.c

  3994	
> 3995	int kparser_xdp_parse(struct xdp_buff *xdp, void *conf, size_t conf_len,
  3996			      void *_metadata, size_t metadata_len)
  3997	{
  3998		struct kparser_hkey *keyptr = (struct kparser_hkey *)conf;
  3999		ktime_t start_time, stop_time, elapsed_time;
  4000		struct kparser_hkey key;
  4001		const void *parser;
  4002		void *data;
  4003		int pktlen;
  4004		int rc = 0;
  4005	
  4006		key.id = keyptr->id;
  4007		strcpy(key.name, keyptr->name);
  4008		pktlen = xdp_get_buff_len(xdp);
  4009		data = (void *)(long)xdp->data;
  4010		if (!kparser_funchooks.kparser_get_parser_hook) {
  4011			pr_err("\n kparser module not loaded\n");
  4012			return -EINVAL;
  4013		} else {
  4014			parser = kparser_funchooks.kparser_get_parser_hook(&key);
  4015			if (!parser) {
  4016				pr_err("kparser_get_parser() failed, key:{%s:%u}\n",
  4017				       key.name, key.id);
  4018				return -EINVAL;
  4019			}
  4020		}
  4021	
  4022		if (!kparser_funchooks.__kparser_parse_hook) {
  4023			pr_err("\n kparser module not loaded\n");
  4024			return -EINVAL;
  4025		} else {
  4026	#if KPARSER_DEBUG
  4027			start_time = ktime_get();
  4028	#endif
  4029			rc = kparser_funchooks.__kparser_parse_hook(parser, data, pktlen,
  4030								    _metadata, metadata_len);
  4031	#if KPARSER_DEBUG
  4032			stop_time = ktime_get();
  4033			elapsed_time = ktime_sub(stop_time, start_time);
  4034			pr_err("elapsedTime : %lld\n",  ktime_to_ns(elapsed_time));
  4035	#endif
  4036			if (!kparser_funchooks.kparser_put_parser_hook) {
  4037				pr_err("\n kparser module not loaded\n");
  4038				return -EINVAL;
  4039			} else {
  4040				if (kparser_funchooks.kparser_put_parser_hook(parser) != true)
  4041					pr_err("kparser_put_parser() failed\n");
  4042			}
  4043	#if KPARSER_DEBUG
  4044			pr_debug("%s:rc:{%d:%s}\n", __func__, rc, kparser_code_to_text(rc));
  4045	#endif
  4046		}
  4047		return rc;
  4048	}
  4049	
  4050	BPF_CALL_5(bpf_xdp_kparser, struct xdp_buff *, xdp, void *, conf,
  4051		   u32, conf_len, void *, buf, u32, len)
  4052	{
> 4053		int len1;
> 4054		int err;
  4055	
  4056		len1 = xdp_get_buff_len(xdp);
  4057		err = kparser_xdp_parse(xdp, conf, conf_len, buf, len);
  4058		return 0;
  4059	}
  4060	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp