Hi,

[auto build test WARNING on v4.7-rc7]
[cannot apply to net/master net-next/master ipsec-next/master]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

url:    
https://github.com/0day-ci/linux/commits/Jiri-Kosina/net-sched-convert-qdisc-linked-list-to-hashtable/20160729-155412
config: x86_64-randconfig-s1-07292101 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/dec/tulip/de4x5.c:480:
   drivers/net/ethernet/dec/tulip/de4x5.h:864:1: warning: "HASH_BITS" redefined
   In file included from include/linux/netdevice.h:55,
                    from drivers/net/ethernet/dec/tulip/de4x5.c:459:
>> include/linux/hashtable.h:27:1: warning: this is the location of the 
>> previous definition
   drivers/net/ethernet/dec/tulip/de4x5.o: warning: objtool: 
dma_free_coherent()+0x4b: function has unreachable instruction

vim +27 include/linux/hashtable.h

d9b482c8 Sasha Levin  2012-10-30  11  #include <linux/kernel.h>
d9b482c8 Sasha Levin  2012-10-30  12  #include <linux/hash.h>
d9b482c8 Sasha Levin  2012-10-30  13  #include <linux/rculist.h>
d9b482c8 Sasha Levin  2012-10-30  14  
d9b482c8 Sasha Levin  2012-10-30  15  #define DEFINE_HASHTABLE(name, bits)      
                                        \
d9b482c8 Sasha Levin  2012-10-30  16    struct hlist_head name[1 << (bits)] =   
                                \
d9b482c8 Sasha Levin  2012-10-30  17                    { [0 ... ((1 << (bits)) 
- 1)] = HLIST_HEAD_INIT }
d9b482c8 Sasha Levin  2012-10-30  18  
6180d9de Eric Dumazet 2015-11-18  19  #define 
DEFINE_READ_MOSTLY_HASHTABLE(name, bits)                          \
6180d9de Eric Dumazet 2015-11-18  20    struct hlist_head name[1 << (bits)] 
__read_mostly =                     \
6180d9de Eric Dumazet 2015-11-18  21                    { [0 ... ((1 << (bits)) 
- 1)] = HLIST_HEAD_INIT }
6180d9de Eric Dumazet 2015-11-18  22  
d9b482c8 Sasha Levin  2012-10-30  23  #define DECLARE_HASHTABLE(name, bits)     
                                \
d9b482c8 Sasha Levin  2012-10-30  24    struct hlist_head name[1 << (bits)]
d9b482c8 Sasha Levin  2012-10-30  25  
d9b482c8 Sasha Levin  2012-10-30  26  #define HASH_SIZE(name) (ARRAY_SIZE(name))
d9b482c8 Sasha Levin  2012-10-30 @27  #define HASH_BITS(name) 
ilog2(HASH_SIZE(name))
d9b482c8 Sasha Levin  2012-10-30  28  
d9b482c8 Sasha Levin  2012-10-30  29  /* Use hash_32 when possible to allow for 
fast 32bit hashing in 64bit kernels. */
d9b482c8 Sasha Levin  2012-10-30  30  #define hash_min(val, bits)               
                                        \
d9b482c8 Sasha Levin  2012-10-30  31    (sizeof(val) <= 4 ? hash_32(val, bits) 
: hash_long(val, bits))
d9b482c8 Sasha Levin  2012-10-30  32  
d9b482c8 Sasha Levin  2012-10-30  33  static inline void __hash_init(struct 
hlist_head *ht, unsigned int sz)
d9b482c8 Sasha Levin  2012-10-30  34  {
d9b482c8 Sasha Levin  2012-10-30  35    unsigned int i;

:::::: The code at line 27 was first introduced by commit
:::::: d9b482c8ba1973a189f2d4c8175d405b87fbf2d7 hashtable: introduce a small 
and naive hashtable

:::::: TO: Sasha Levin <levinsasha...@gmail.com>
:::::: CC: Linus Torvalds <torva...@linux-foundation.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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