Hi Jakub,
I love your patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
[also build test WARNING on net-next/master next-20200526]
[cannot apply to bpf/master net/master linus/master v5.7-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see
https://stackoverflow.com/a/37406982]
url:
https://github.com/0day-ci/linux/commits/Jakub-Sitnicki/Link-based-progra...
base:
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: arm-randconfig-r035-20200527 (attached as .config)
compiler: clang version 11.0.0 (
https://github.com/llvm/llvm-project
3393cc4cebf9969db94dc424b7a2b6195589c33b)
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
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
> kernel/bpf/net_namespace.c:130:6: warning: variable
'inum' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
if (net)
^~~
kernel/bpf/net_namespace.c:134:26: note: uninitialized use occurs here
info->netns.netns_ino = inum;
^~~~
kernel/bpf/net_namespace.c:130:2: note: remove the 'if' if its condition is always
true
if (net)
^~~~~~~~
kernel/bpf/net_namespace.c:123:19: note: initialize the variable 'inum' to silence
this warning
unsigned int inum;
^
= 0
1 warning generated.
vim +130 kernel/bpf/net_namespace.c
118
119 static int bpf_netns_link_fill_info(const struct bpf_link *link,
120 struct bpf_link_info *info)
121 {
122 const struct bpf_netns_link *net_link;
123 unsigned int inum;
124 struct net *net;
125
126 net_link = container_of(link, struct bpf_netns_link, link);
127
128 rcu_read_lock();
129 net = rcu_dereference(net_link->net);
130 if (net)
131 inum = net->ns.inum;
132 rcu_read_unlock();
133
134 info->netns.netns_ino = inum;
135 info->netns.attach_type = net_link->type;
136 return 0;
137 }
138
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org