Hi Arun,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Arun-Ramadoss/net-dsa-microchip-add-PTP-support-for-KSZ9x-and-LAN937x/20221121-234819
patch link:    https://lore.kernel.org/r/20221121154150.9573-7-arun.ramadoss%40microchip.com
patch subject: [RFC Patch net-next v2 6/8] net: dsa: microchip: Adding the ptp packet reception logic
config: i386-randconfig-a005-20221121
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/c747439df1f02c175acdcfc248660b650f0941f3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Arun-Ramadoss/net-dsa-microchip-add-PTP-support-for-KSZ9x-and-LAN937x/20221121-234819
        git checkout c747439df1f02c175acdcfc248660b650f0941f3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/dsa/

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

All errors (new ones prefixed by >>):

>> net/dsa/tag_ksz.c:227:2: error: implicit declaration of function 'ptp_header_update_correction' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           ptp_header_update_correction(skb, ptp_type, ptp_hdr, correction);
           ^
   1 error generated.


vim +/ptp_header_update_correction +227 net/dsa/tag_ksz.c

   172	
   173	static void ksz_rcv_timestamp(struct sk_buff *skb, u8 *tag,
   174				      struct net_device *dev, unsigned int port)
   175	{
   176		struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
   177		u8 *tstamp_raw = tag - KSZ9477_PTP_TAG_LEN;
   178		struct dsa_switch *ds = dev->dsa_ptr->ds;
   179		struct ksz_tagger_data *tagger_data;
   180		struct ptp_header *ptp_hdr;
   181		unsigned int ptp_type;
   182		u8 ptp_msg_type;
   183		ktime_t tstamp;
   184		s64 correction;
   185	
   186		tagger_data = ksz_tagger_data(ds);
   187		if (!tagger_data->meta_tstamp_handler)
   188			return;
   189	
   190		/* convert time stamp and write to skb */
   191		tstamp = ksz_decode_tstamp(get_unaligned_be32(tstamp_raw));
   192		memset(hwtstamps, 0, sizeof(*hwtstamps));
   193		hwtstamps->hwtstamp = tagger_data->meta_tstamp_handler(ds, tstamp);
   194	
   195		if (skb_headroom(skb) < ETH_HLEN)
   196			return;
   197	
   198		__skb_push(skb, ETH_HLEN);
   199		ptp_type = ptp_classify_raw(skb);
   200		__skb_pull(skb, ETH_HLEN);
   201	
   202		if (ptp_type == PTP_CLASS_NONE)
   203			return;
   204	
   205		ptp_hdr = ptp_parse_header(skb, ptp_type);
   206		if (!ptp_hdr)
   207			return;
   208	
   209		if (!tagger_data->is_ptp_twostep)
   210			return;
   211	
   212		if (tagger_data->is_ptp_twostep(ds, port))
   213			return;
   214	
   215		ptp_msg_type = ptp_get_msgtype(ptp_hdr, ptp_type);
   216		if (ptp_msg_type != PTP_MSGTYPE_PDELAY_REQ)
   217			return;
   218	
   219		/* Only subtract the partial time stamp from the correction field.  When
   220		 * the hardware adds the egress time stamp to the correction field of
   221		 * the PDelay_Resp message on tx, also only the partial time stamp will
   222		 * be added.
   223		 */
   224		correction = (s64)get_unaligned_be64(&ptp_hdr->correction);
   225		correction -= ktime_to_ns(tstamp) << 16;
   226	
 > 227		ptp_header_update_correction(skb, ptp_type, ptp_hdr, correction);
   228	}
   229	

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