Hi, [auto build test WARNING on scsi/for-next] [also build test WARNING on v4.7-rc3 next-20160609] [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/Charles-Chiou/scsi-stex-c-Support-Pegasus-3-product/20160614-142621 base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: sparc64-allmodconfig (attached as .config) compiler: sparc64-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205 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 # save the attached .config to linux build tree make.cross ARCH=sparc64 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from arch/sparc/include/asm/string.h:4:0, from include/linux/string.h:18, from include/linux/bitmap.h:8, from include/linux/nodemask.h:94, from include/linux/mmzone.h:16, from include/linux/gfp.h:5, from include/linux/slab.h:14, from drivers/scsi/stex.c:20: drivers/scsi/stex.c: In function 'stex_handshake': >> arch/sparc/include/asm/string_64.h:28:29: warning: 'scratch' may be used uninitialized in this function [-Wmaybe-uninitialized] #define memset(s, c, count) __builtin_memset(s, c, count) ^ drivers/scsi/stex.c:1111:10: note: 'scratch' was declared here __le32 *scratch; ^ vim +/scratch +28 arch/sparc/include/asm/string_64.h f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 12 /* Really, userland/ksyms should not see any of this stuff. */ f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 13 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 14 #ifdef __KERNEL__ f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 15 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 16 #include <asm/asi.h> f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 17 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 18 #ifndef EXPORT_SYMTAB_STROPS f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 19 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 20 /* First the mem*() things. */ f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 21 #define __HAVE_ARCH_MEMMOVE f05a6865 arch/sparc/include/asm/string_64.h Sam Ravnborg 2014-05-16 22 void *memmove(void *, const void *, __kernel_size_t); f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 23 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 24 #define __HAVE_ARCH_MEMCPY 4d14a459 arch/sparc/include/asm/string_64.h David S. Miller 2009-12-10 25 #define memcpy(t, f, n) __builtin_memcpy(t, f, n) f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 26 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 27 #define __HAVE_ARCH_MEMSET 4d14a459 arch/sparc/include/asm/string_64.h David S. Miller 2009-12-10 @28 #define memset(s, c, count) __builtin_memset(s, c, count) f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 29 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 30 #define __HAVE_ARCH_MEMSCAN f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 31 f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 32 #undef memscan f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 33 #define memscan(__arg0, __char, __arg2) \ f5e706ad include/asm-sparc/string_64.h Sam Ravnborg 2008-07-17 34 ({ \ f05a6865 arch/sparc/include/asm/string_64.h Sam Ravnborg 2014-05-16 35 void *__memscan_zero(void *, size_t); \ f05a6865 arch/sparc/include/asm/string_64.h Sam Ravnborg 2014-05-16 36 void *__memscan_generic(void *, int, size_t); \ :::::: The code at line 28 was first introduced by commit :::::: 4d14a459857bd151ecbd14bcd37b4628da00792b sparc: Stop trying to be so fancy and use __builtin_{memcpy,memset}() :::::: TO: David S. Miller <davem@xxxxxxxxxxxxx> :::::: CC: David S. Miller <davem@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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