tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master
head: 10d4879f9ef01cc6190fafe4257d06f375bab92c
commit: e188f3330a13df904d77003846eafd3edf99009d ARC: cmpxchg/xchg: rewrite as
macros to make type safe
date: 1 year ago
config: arc-randconfig-s041-20220828
(https://download.01.org/0day-ci/archive/20220828/202208281216.awxruhll-...@intel.com/config)
compiler: arc-elf-gcc (GCC) 12.1.0
reproduce:
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e188f3330a13df904d77003846eafd3edf99009d
git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e188f3330a13df904d77003846eafd3edf99009d
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc
SHELL=/bin/bash net/ipv4/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <l...@intel.com>
sparse warnings: (new ones prefixed by >>)
>> net/ipv4/tcp_cong.c:238:24: sparse: sparse: incorrect type in initializer
>> (different address spaces) @@ expected struct tcp_congestion_ops const
>> [noderef] __rcu *_val_ @@ got struct tcp_congestion_ops *[assigned] ca @@
net/ipv4/tcp_cong.c:238:24: sparse: expected struct tcp_congestion_ops
const [noderef] __rcu *_val_
net/ipv4/tcp_cong.c:238:24: sparse: got struct tcp_congestion_ops
*[assigned] ca
net/ipv4/tcp_cong.c:238:22: sparse: sparse: incorrect type in assignment
(different address spaces) @@ expected struct tcp_congestion_ops const
*prev @@ got struct tcp_congestion_ops const [noderef] __rcu *[assigned]
_val_ @@
net/ipv4/tcp_cong.c:238:22: sparse: expected struct tcp_congestion_ops
const *prev
net/ipv4/tcp_cong.c:238:22: sparse: got struct tcp_congestion_ops const
[noderef] __rcu *[assigned] _val_
vim +238 net/ipv4/tcp_cong.c
317a76f9a44b43 Stephen Hemminger 2005-06-23 219
317a76f9a44b43 Stephen Hemminger 2005-06-23 220 /* Used by sysctl to change
default congestion control */
6670e152447732 Stephen Hemminger 2017-11-14 221 int
tcp_set_default_congestion_control(struct net *net, const char *name)
317a76f9a44b43 Stephen Hemminger 2005-06-23 222 {
317a76f9a44b43 Stephen Hemminger 2005-06-23 223 struct
tcp_congestion_ops *ca;
6670e152447732 Stephen Hemminger 2017-11-14 224 const struct
tcp_congestion_ops *prev;
6670e152447732 Stephen Hemminger 2017-11-14 225 int ret;
317a76f9a44b43 Stephen Hemminger 2005-06-23 226
6670e152447732 Stephen Hemminger 2017-11-14 227 rcu_read_lock();
6670e152447732 Stephen Hemminger 2017-11-14 228 ca =
tcp_ca_find_autoload(net, name);
6670e152447732 Stephen Hemminger 2017-11-14 229 if (!ca) {
6670e152447732 Stephen Hemminger 2017-11-14 230 ret = -ENOENT;
0baf26b0fcd74b Martin KaFai Lau 2020-01-08 231 } else if
(!bpf_try_module_get(ca, ca->owner)) {
6670e152447732 Stephen Hemminger 2017-11-14 232 ret = -EBUSY;
8d432592f30fcc Jonathon Reinhart 2021-05-01 233 } else if (!net_eq(net,
&init_net) &&
8d432592f30fcc Jonathon Reinhart 2021-05-01 234
!(ca->flags & TCP_CONG_NON_RESTRICTED)) {
8d432592f30fcc Jonathon Reinhart 2021-05-01 235 /* Only init
netns can set default to a restricted algorithm */
8d432592f30fcc Jonathon Reinhart 2021-05-01 236 ret = -EPERM;
6670e152447732 Stephen Hemminger 2017-11-14 237 } else {
6670e152447732 Stephen Hemminger 2017-11-14 @238 prev =
xchg(&net->ipv4.tcp_congestion_control, ca);
6670e152447732 Stephen Hemminger 2017-11-14 239 if (prev)
0baf26b0fcd74b Martin KaFai Lau 2020-01-08 240
bpf_module_put(prev, prev->owner);
317a76f9a44b43 Stephen Hemminger 2005-06-23 241
6670e152447732 Stephen Hemminger 2017-11-14 242 ca->flags |=
TCP_CONG_NON_RESTRICTED;
317a76f9a44b43 Stephen Hemminger 2005-06-23 243 ret = 0;
317a76f9a44b43 Stephen Hemminger 2005-06-23 244 }
6670e152447732 Stephen Hemminger 2017-11-14 245 rcu_read_unlock();
317a76f9a44b43 Stephen Hemminger 2005-06-23 246
317a76f9a44b43 Stephen Hemminger 2005-06-23 247 return ret;
317a76f9a44b43 Stephen Hemminger 2005-06-23 248 }
317a76f9a44b43 Stephen Hemminger 2005-06-23 249
:::::: The code at line 238 was first introduced by commit
:::::: 6670e152447732ba90626f36dfc015a13fbf150e tcp: Namespace-ify
sysctl_tcp_default_congestion_control
:::::: TO: Stephen Hemminger <step...@networkplumber.org>
:::::: CC: David S. Miller <da...@davemloft.net>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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