tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   347cad72f27e526e6de25a22758402592db9f2df
commit: 022cba349324411db2c6c1c1b2461604a095e9c5 [11098/11117] usr/Kconfig: make initrd compression algorithm selection not expert
config: blackfin-CM-BF548_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout 022cba349324411db2c6c1c1b2461604a095e9c5
  # save the attached .config to linux build tree
  make.cross ARCH=blackfin 

All warnings:

   In file included from lib/lz4/lz4_decompress.c:48:0:
>> lib/lz4/lz4defs.h:46:0: warning: "A32" redefined [enabled by default]
   arch/blackfin/mach-bf548/include/mach/defBF547.h:568:0: note: this is the location of the previous definition

vim +/A32 +46 lib/lz4/lz4defs.h

cffb78b0 Kyungsik Lee 2013-07-08  30  	&& defined(ARM_EFFICIENT_UNALIGNED_ACCESS)
cffb78b0 Kyungsik Lee 2013-07-08  31  
c72ac7a1 Chanho Min   2013-07-08  32  #define A16(x) (((U16_S *)(x))->v)
cffb78b0 Kyungsik Lee 2013-07-08  33  #define A32(x) (((U32_S *)(x))->v)
cffb78b0 Kyungsik Lee 2013-07-08  34  #define A64(x) (((U64_S *)(x))->v)
cffb78b0 Kyungsik Lee 2013-07-08  35  
cffb78b0 Kyungsik Lee 2013-07-08  36  #define PUT4(s, d) (A32(d) = A32(s))
cffb78b0 Kyungsik Lee 2013-07-08  37  #define PUT8(s, d) (A64(d) = A64(s))
c72ac7a1 Chanho Min   2013-07-08  38  #define LZ4_WRITE_LITTLEENDIAN_16(p, v)	\
c72ac7a1 Chanho Min   2013-07-08  39  	do {	\
c72ac7a1 Chanho Min   2013-07-08  40  		A16(p) = v; \
c72ac7a1 Chanho Min   2013-07-08  41  		p += 2; \
c72ac7a1 Chanho Min   2013-07-08  42  	} while (0)
cffb78b0 Kyungsik Lee 2013-07-08  43  #else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */
cffb78b0 Kyungsik Lee 2013-07-08  44  
c72ac7a1 Chanho Min   2013-07-08  45  #define A64(x) get_unaligned((u64 *)&(((U16_S *)(x))->v))
c72ac7a1 Chanho Min   2013-07-08 @46  #define A32(x) get_unaligned((u32 *)&(((U16_S *)(x))->v))
c72ac7a1 Chanho Min   2013-07-08  47  #define A16(x) get_unaligned((u16 *)&(((U16_S *)(x))->v))
c72ac7a1 Chanho Min   2013-07-08  48  
cffb78b0 Kyungsik Lee 2013-07-08  49  #define PUT4(s, d) \
cffb78b0 Kyungsik Lee 2013-07-08  50  	put_unaligned(get_unaligned((const u32 *) s), (u32 *) d)
cffb78b0 Kyungsik Lee 2013-07-08  51  #define PUT8(s, d) \
cffb78b0 Kyungsik Lee 2013-07-08  52  	put_unaligned(get_unaligned((const u64 *) s), (u64 *) d)
c72ac7a1 Chanho Min   2013-07-08  53  
c72ac7a1 Chanho Min   2013-07-08  54  #define LZ4_WRITE_LITTLEENDIAN_16(p, v)	\

:::::: The code at line 46 was first introduced by commit
:::::: c72ac7a1a926dbffb59daf0f275450e5eecce16f lib: add lz4 compressor module

:::::: TO: Chanho Min <chanho.min@lge.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY kernel build testing backend              Open Source Technology Center
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