Subject: Re: [PATCH net-next v1 resend 1/2] net: Update bhash2 when socket's rcv saddr changes

From: kernel test robot <[email-masked]>
Date: Thu, 2 Jun 2022 09:09:36 +0800

Hi Joanne,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Joanne-Koong/Update-bhash2-when-socket-s-rcv-saddr-changes/20220602-050108
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 7e062cda7d90543ac8c7700fc7c5527d0c0f22ad
config: hexagon-defconfig (https://download.01.org/0day-ci/archive/20220602/[email-masked]/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c825abd6b0198fb088d9752f556a70705bc99dfd)
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/d4e9d3ab2c5210670fbe995cc8b13310a5aa6310
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Joanne-Koong/Update-bhash2-when-socket-s-rcv-saddr-changes/20220602-050108
        git checkout d4e9d3ab2c5210670fbe995cc8b13310a5aa6310
        # 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=hexagon SHELL=/bin/bash net/ipv4/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email-masked]>

All warnings (new ones prefixed by >>):

>> net/ipv4/inet_hashtables.c:830:5: warning: no previous prototype for function '__inet_bhash2_update_saddr' [-Wmissing-prototypes]
   int __inet_bhash2_update_saddr(struct sock *sk, struct inet_hashinfo *hinfo,
       ^
   net/ipv4/inet_hashtables.c:830:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __inet_bhash2_update_saddr(struct sock *sk, struct inet_hashinfo *hinfo,
   ^
   static 
   1 warning generated.

vim +/__inet_bhash2_update_saddr +830 net/ipv4/inet_hashtables.c

   828	
   829	/* the lock for the socket's corresponding bhash entry must be held */
 > 830	int __inet_bhash2_update_saddr(struct sock *sk, struct inet_hashinfo *hinfo,
   831				       struct net *net, int port, int l3mdev)
   832	{
   833		struct inet_bind2_hashbucket *head2;
   834		struct inet_bind2_bucket *tb2;
   835	
   836		tb2 = inet_bind2_bucket_find(hinfo, net, port, l3mdev, sk,
   837					     &head2);
   838		if (!tb2) {
   839			tb2 = inet_bind2_bucket_create(hinfo->bind2_bucket_cachep,
   840						       net, head2, port, l3mdev, sk);
   841			if (!tb2)
   842				return -ENOMEM;
   843		}
   844	
   845		/* Remove the socket's old entry from bhash2 */
   846		__sk_del_bind2_node(sk);
   847	
   848		sk_add_bind2_node(sk, &tb2->owners);
   849		inet_csk(sk)->icsk_bind2_hash = tb2;
   850	
   851		return 0;
   852	}
   853	

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