[jpirko-mlxsw:petrm_resilient 19/19] net/ipv4/nexthop.c:1135:9: sparse: struct nh_grp_entry __rcu COPYING CREDITS Documentation Kbuild Kconfig LICENSES MAINTAINERS Makefile README arch block certs crypto drivers fs include init ipc kernel lib mm net samples scripts security sound tools usr virt

[jpirko-mlxsw:petrm_resilient 19/19] net/ipv4/nexthop.c:1135:9: sparse: struct nh_grp_entry __rcu COPYING CREDITS Documentation Kbuild Kconfig LICENSES MAINTAINERS Makefile README arch block certs crypto drivers fs include init ipc kernel lib mm net samples scripts security sound tools usr virt

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: Petr Machata <me@pmachata.org>

tree:   https://github.com/jpirko/linux_mlxsw petrm_resilient
head:   df2269005def050853e664c954fd987562382c2f
commit: df2269005def050853e664c954fd987562382c2f [19/19] wip
:::::: branch date: 3 hours ago
:::::: commit date: 3 hours ago
config: x86_64-randconfig-s022-20201207 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-179-ga00755aa-dirty
        # https://github.com/jpirko/linux_mlxsw/commit/df2269005def050853e664c954fd987562382c2f
        git remote add jpirko-mlxsw https://github.com/jpirko/linux_mlxsw
        git fetch --no-tags jpirko-mlxsw petrm_resilient
        git checkout df2269005def050853e664c954fd987562382c2f
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
   net/ipv4/nexthop.c:1135:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
>> net/ipv4/nexthop.c:1135:9: sparse:    struct nh_grp_entry [noderef] __rcu *
>> net/ipv4/nexthop.c:1135:9: sparse:    struct nh_grp_entry *
   net/ipv4/nexthop.c:2844:13: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct nh_group *nhg @@     got struct nh_group [noderef] __rcu *nh_grp @@
   net/ipv4/nexthop.c:2876:13: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct nh_group *nhg @@     got struct nh_group [noderef] __rcu *nh_grp @@
   net/ipv4/nexthop.c: note: in included file (through include/linux/sysctl.h, include/net/net_namespace.h, include/linux/netdevice.h, ...):
   include/linux/rbtree.h:84:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   include/linux/rbtree.h:84:9: sparse:    struct rb_node [noderef] __rcu *
   include/linux/rbtree.h:84:9: sparse:    struct rb_node *

vim +1135 net/ipv4/nexthop.c

df2269005def05 Petr Machata 2020-12-07  1121  
df2269005def05 Petr Machata 2020-12-07  1122  static void nh_res_bucket_set_nh(struct nh_res_bucket *bucket,
df2269005def05 Petr Machata 2020-12-07  1123  				 struct nh_grp_entry *nhge)
df2269005def05 Petr Machata 2020-12-07  1124  {
df2269005def05 Petr Machata 2020-12-07  1125  	if (bucket->occupied) {
df2269005def05 Petr Machata 2020-12-07  1126  		bucket->nh_entry->res.count_buckets--;
df2269005def05 Petr Machata 2020-12-07  1127  		if (nh_res_entry_is_balanced(bucket->nh_entry)) {
df2269005def05 Petr Machata 2020-12-07  1128  			bucket->nh_entry->res.in_reserve = false;
df2269005def05 Petr Machata 2020-12-07  1129  			printk(KERN_WARNING "NHGE %d not in reserve anymore\n",
df2269005def05 Petr Machata 2020-12-07  1130  			       bucket->nh_entry->nh->id);
df2269005def05 Petr Machata 2020-12-07  1131  		}
df2269005def05 Petr Machata 2020-12-07  1132  	}
df2269005def05 Petr Machata 2020-12-07  1133  
df2269005def05 Petr Machata 2020-12-07  1134  	bucket->occupied = true;
df2269005def05 Petr Machata 2020-12-07 @1135  	rcu_assign_pointer(bucket->nh_entry, nhge);
df2269005def05 Petr Machata 2020-12-07  1136  
df2269005def05 Petr Machata 2020-12-07  1137  	nhge->res.count_buckets++;
df2269005def05 Petr Machata 2020-12-07  1138  }
df2269005def05 Petr Machata 2020-12-07  1139  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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