Hi Kees,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20250723]
[cannot apply to net-next/main bluetooth-next/master bluetooth/master brauner-vfs/vfs.all mkl-can-next/testing mptcp/export mptcp/export-net trondmy-nfs/linux-next linus/master v6.16-rc7 v6.16-rc6 v6.16-rc5 v6.16-rc7]
[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/Kees-Cook/net-uapi-Add-__kernel_sockaddr_unspec-for-sockaddr-of-unknown-length/20250724-072218
base:   next-20250723
patch link:    https://lore.kernel.org/r/20250723231921.2293685-4-kees%40kernel.org
patch subject: [PATCH 4/6 net-next] net: Convert proto_ops connect() callbacks to use sockaddr_unspec
config: x86_64-buildonly-randconfig-005-20250724 (https://download.01.org/0day-ci/archive/20250724/202507241955.kFMs4J5b-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250724/202507241955.kFMs4J5b-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202507241955.kFMs4J5b-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):

quoted

net/mctp/af_mctp.c:632:13: error: incompatible function pointer types initializing 'int (*)(struct socket *, struct __kernel_sockaddr_unspec *, int, int)' with an expression of type 'int (struct socket *, struct sockaddr *, int, int)' [-Wincompatible-function-pointer-types]

     632 |         .connect        = mctp_connect,
         |                           ^~~~~~~~~~~~
   1 error generated.


vim +632 net/mctp/af_mctp.c

63ed1aab3d40aa Matt Johnston 2022-02-09  627  
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  628  static const struct proto_ops mctp_dgram_ops = {
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  629  	.family		= PF_MCTP,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  630  	.release	= mctp_release,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  631  	.bind		= mctp_bind,
3549eb08e55058 Matt Johnston 2025-07-10 @632  	.connect	= mctp_connect,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  633  	.socketpair	= sock_no_socketpair,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  634  	.accept		= sock_no_accept,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  635  	.getname	= sock_no_getname,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  636  	.poll		= datagram_poll,
63ed1aab3d40aa Matt Johnston 2022-02-09  637  	.ioctl		= mctp_ioctl,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  638  	.gettstamp	= sock_gettstamp,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  639  	.listen		= sock_no_listen,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  640  	.shutdown	= sock_no_shutdown,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  641  	.setsockopt	= mctp_setsockopt,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  642  	.getsockopt	= mctp_getsockopt,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  643  	.sendmsg	= mctp_sendmsg,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  644  	.recvmsg	= mctp_recvmsg,
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  645  	.mmap		= sock_no_mmap,
63ed1aab3d40aa Matt Johnston 2022-02-09  646  #ifdef CONFIG_COMPAT
63ed1aab3d40aa Matt Johnston 2022-02-09  647  	.compat_ioctl	= mctp_compat_ioctl,
63ed1aab3d40aa Matt Johnston 2022-02-09  648  #endif
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  649  };
8f601a1e4f8c84 Jeremy Kerr   2021-07-29  650  

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