Re: [PATCH mptcp-next 3/4] mptcp: move msk input path under full msk socket lock

[kernel test robot <lkp@intel.com>]

Hi Paolo,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mptcp/export]
[cannot apply to linus/master v5.19-rc8 next-20220728]
[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/Paolo-Abeni/mptcp-just-another-receive-path-refactor/20220729-233501
base:   https://github.com/multipath-tcp/mptcp_net-next.git export
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220730/202207300141.nTSygY8v-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/120ee56b1ad70bbb3d1b35c107110b0f83b2e4e1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Paolo-Abeni/mptcp-just-another-receive-path-refactor/20220729-233501
        git checkout 120ee56b1ad70bbb3d1b35c107110b0f83b2e4e1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash net/ipv4/ net/mptcp/

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/mptcp/protocol.c:798:6: warning: no previous prototype for '__mptcp_data_ready' [-Wmissing-prototypes]
     798 | void __mptcp_data_ready(struct sock *sk, struct sock *ssk)
         |      ^~~~~~~~~~~~~~~~~~


vim +/__mptcp_data_ready +798 net/mptcp/protocol.c

   797	
 > 798	void __mptcp_data_ready(struct sock *sk, struct sock *ssk)
   799	{
   800		struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
   801	
   802		/* The peer can send data while we are shutting down this
   803		 * subflow at msk destruction time, but we must avoid enqueuing
   804		 * more data to the msk receive queue
   805		 */
   806		if (unlikely(subflow->disposable))
   807			return;
   808	
   809		/* Wake-up the reader only for in-sequence data */
   810		if (move_skbs_to_msk(mptcp_sk(sk), ssk))
   811			sk->sk_data_ready(sk);
   812	}
   813	

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