netdev - Re: [PATCH net-next 6/6] ila: Add support for xfrm6_xlat

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Date:	Wed, 30 Sep 2015 07:18:37 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Tom Herbert <tom@...bertland.com>
Cc:	kbuild-all@...org, davem@...emloft.net, netdev@...r.kernel.org,
	kernel-team@...com
Subject: Re: [PATCH net-next 6/6] ila: Add support for xfrm6_xlat_addr

Hi Tom,

[auto build test results on next-20150929 -- if it's inappropriate base, please ignore]

reproduce:
  # apt-get install sparse
  make ARCH=x86_64 allmodconfig
  make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> net/ipv6/ila/ila_xlat.c:218:24: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:269:32: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:275:25: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:279:25: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:315:31: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:329:32: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:201:23: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:514:31: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c:184:23: sparse: incompatible types in comparison expression (different address spaces)
   net/ipv6/ila/ila_xlat.c: In function 'ila_xlat_fini':
   net/ipv6/ila/ila_xlat.c:636:6: warning: unused variable 'i' [-Wunused-variable]
     int i;
         ^

vim +218 net/ipv6/ila/ila_xlat.c

   202		}
   203	
   204		return NULL;
   205	}
   206	
   207	static inline void ila_release(struct ila_map *ila)
   208	{
   209		kfree_rcu(ila, rcu);
   210	}
   211	
   212	static void ila_free_cb(void *ptr, void *arg)
   213	{
   214		struct ila_map *ila = (struct ila_map *)ptr, *next;
   215	
   216		/* Assume rcu_readlock held */
   217		while (ila) {
 > 218			next = rcu_access_pointer(ila->next);
   219			ila_release(ila);
   220			ila = next;
   221		}
   222	}
   223	
   224	static int ila_add_mapping(struct net *net, struct ila_xlat_params *p)
   225	{
   226		struct ila_net *ilan = net_generic(net, ila_net_id);

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