Hi Jamal,

[auto build test WARNING on net-next/master]

url:    
https://github.com/0day-ci/linux/commits/Jamal-Hadi-Salim/net_sched-Introduce-skbmod-action/20160907-095338
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   include/linux/compiler.h:230:8: sparse: attribute 'no_sanitize_address': 
unknown attribute
>> net/sched/act_skbmod.c:58:13: sparse: incompatible types in comparison 
>> expression (different address spaces)
   net/sched/act_skbmod.c:165:17: sparse: incompatible types in comparison 
expression (different address spaces)
   net/sched/act_skbmod.c:194:40: sparse: incompatible types in comparison 
expression (different address spaces)

vim +58 net/sched/act_skbmod.c

    42           * then MAX_EDIT_LEN needs to change appropriately
    43          */
    44          err = skb_ensure_writable(skb, ETH_HLEN);
    45          if (unlikely(err)) /* best policy is to drop on the floor */
    46                  action = TC_ACT_SHOT;
    47  
    48          tcf_lastuse_update(&d->tcf_tm);
    49  
    50          rcu_read_lock();
    51          action = READ_ONCE(d->tcf_action);
    52          if (unlikely(action == TC_ACT_SHOT)) {
    53                  d->tcf_qstats.drops++;
    54                  rcu_read_unlock();
    55                  return action;
    56          }
    57  
  > 58          p = rcu_dereference(d->skbmod_p);
    59          flags = p->flags;
    60          if (flags & SKBMOD_F_DMAC)
    61                  ether_addr_copy(eth_hdr(skb)->h_dest, p->eth_dst);
    62          if (flags & SKBMOD_F_SMAC)
    63                  ether_addr_copy(eth_hdr(skb)->h_source, p->eth_src);
    64          if (flags & SKBMOD_F_ETYPE)
    65                  eth_hdr(skb)->h_proto = p->eth_type;
    66          rcu_read_unlock();

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