[melver:cap-analysis/dev 14/33] include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types)

[melver:cap-analysis/dev 14/33] include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git cap-analysis/dev
head:   fdd3a307f8bbbf8727a633b44c3d6a31103e1938
commit: 20516295fa8be1f4447326d6b8fa1b1c5e236951 [14/33] rcu: Support Clang's capability analysis
config: arc-randconfig-r123-20250802 (https://download.01.org/0day-ci/archive/20250803/202508030440.kkrawze3-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 15.1.0
reproduce: (https://download.01.org/0day-ci/archive/20250803/202508030440.kkrawze3-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508030440.kkrawze3-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   net/core/sock.c: note: in included file (through include/net/inet_sock.h, include/net/ip.h, include/linux/errqueue.h):
>> include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct dst_entry *old_dst @@     got void @@
   include/net/sock.h:2179:17: sparse:     expected struct dst_entry *old_dst
   include/net/sock.h:2179:17: sparse:     got void
>> include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct dst_entry *old_dst @@     got void @@
   include/net/sock.h:2179:17: sparse:     expected struct dst_entry *old_dst
   include/net/sock.h:2179:17: sparse:     got void
>> include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct dst_entry *old_dst @@     got void @@
   include/net/sock.h:2179:17: sparse:     expected struct dst_entry *old_dst
   include/net/sock.h:2179:17: sparse:     got void
>> include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct dst_entry *old_dst @@     got void @@
   include/net/sock.h:2179:17: sparse:     expected struct dst_entry *old_dst
   include/net/sock.h:2179:17: sparse:     got void
   net/core/sock.c:2582:9: sparse: sparse: context imbalance in 'sk_clone_lock' - different lock contexts for basic block
>> include/net/sock.h:2179:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct dst_entry *old_dst @@     got void @@
   include/net/sock.h:2179:17: sparse:     expected struct dst_entry *old_dst
   include/net/sock.h:2179:17: sparse:     got void
--
>> net/sched/act_api.c:65:13: sparse: sparse: incorrect type in assignment (different base types) @@     expected struct tc_cookie *old @@     got void @@
   net/sched/act_api.c:65:13: sparse:     expected struct tc_cookie *old
   net/sched/act_api.c:65:13: sparse:     got void
   net/sched/act_api.c:380:17: sparse: sparse: context imbalance in '__tcf_action_put' - unexpected unlock

vim +2179 include/net/sock.h

^1da177e4c3f41 Linus Torvalds 2005-04-16  2171  
^1da177e4c3f41 Linus Torvalds 2005-04-16  2172  static inline void
^1da177e4c3f41 Linus Torvalds 2005-04-16  2173  sk_dst_set(struct sock *sk, struct dst_entry *dst)
^1da177e4c3f41 Linus Torvalds 2005-04-16  2174  {
7f502361531e9e Eric Dumazet   2014-06-30  2175  	struct dst_entry *old_dst;
7f502361531e9e Eric Dumazet   2014-06-30  2176  
7f502361531e9e Eric Dumazet   2014-06-30  2177  	sk_tx_queue_clear(sk);
eb44ad4e635132 Eric Dumazet   2023-09-21  2178  	WRITE_ONCE(sk->sk_dst_pending_confirm, 0);
b4cb4a1391dcdc Eric Dumazet   2024-06-04 @2179  	old_dst = unrcu_pointer(xchg(&sk->sk_dst_cache, RCU_INITIALIZER(dst)));
7f502361531e9e Eric Dumazet   2014-06-30  2180  	dst_release(old_dst);
^1da177e4c3f41 Linus Torvalds 2005-04-16  2181  }
^1da177e4c3f41 Linus Torvalds 2005-04-16  2182  

:::::: The code at line 2179 was first introduced by commit
:::::: b4cb4a1391dcdc640c4ade003aaf0ee19cc8d509 net: use unrcu_pointer() helper

:::::: TO: Eric Dumazet <edumazet@google.com>
:::::: CC: Paolo Abeni <pabeni@redhat.com>

-- 
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