Messages in this thread | | | Date | Fri, 15 Apr 2016 17:16:54 +0800 | From | kbuild test robot <> | Subject | Re: [PATCH] blackfin: optimize ffz, __ffs, ffs, __fls, and fls functions |
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Hi Zhaoxiu,
[auto build test ERROR on v4.6-rc3] [also build test ERROR on next-20160414] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/zengzhaoxiu-163-com/blackfin-optimize-ffz-__ffs-ffs-__fls-and-fls-functions/20160415-155549 config: blackfin-TCM-BF537_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 # save the attached .config to linux build tree make.cross ARCH=blackfin
All errors (new ones prefixed by >>):
In file included from arch/blackfin/include/asm/bitops.h:12:0, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/asm-generic/bug.h:13, from arch/blackfin/include/asm/bug.h:71, from include/linux/bug.h:4, from include/linux/page-flags.h:9, from kernel/bounds.c:9: include/asm-generic/bitops/fls64.h: In function 'fls64': >> include/asm-generic/bitops/fls64.h:22:3: error: implicit declaration of function 'fls' [-Werror=implicit-function-declaration] In file included from arch/blackfin/include/asm/bitops.h:19:0, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/asm-generic/bug.h:13, from arch/blackfin/include/asm/bug.h:71, from include/linux/bug.h:4, from include/linux/page-flags.h:9, from kernel/bounds.c:9: include/asm-generic/bitops/sched.h: In function 'sched_find_first_bit': >> include/asm-generic/bitops/sched.h:20:3: error: implicit declaration of function '__ffs' [-Werror=implicit-function-declaration] In file included from include/linux/bitops.h:36:0, from include/linux/kernel.h:10, from include/asm-generic/bug.h:13, from arch/blackfin/include/asm/bug.h:71, from include/linux/bug.h:4, from include/linux/page-flags.h:9, from kernel/bounds.c:9: arch/blackfin/include/asm/bitops.h: At top level: >> arch/blackfin/include/asm/bitops.h:168:29: error: conflicting types for '__ffs' include/asm-generic/bitops/sched.h:20:10: note: previous implicit declaration of '__ffs' was here >> arch/blackfin/include/asm/bitops.h:177:19: error: static declaration of 'fls' follows non-static declaration include/asm-generic/bitops/fls64.h:22:10: note: previous implicit declaration of 'fls' was here cc1: some warnings being treated as errors make[2]: *** [kernel/bounds.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2
vim +/fls +22 include/asm-generic/bitops/fls64.h
d57594c20 Alexander van Heukelum 2008-03-15 16 */ d57594c20 Alexander van Heukelum 2008-03-15 17 #if BITS_PER_LONG == 32 c8399943b Andi Kleen 2009-01-12 18 static __always_inline int fls64(__u64 x) 2dfc383ad Akinobu Mita 2006-03-26 19 { 2dfc383ad Akinobu Mita 2006-03-26 20 __u32 h = x >> 32; 2dfc383ad Akinobu Mita 2006-03-26 21 if (h) 2dfc383ad Akinobu Mita 2006-03-26 @22 return fls(h) + 32; 2dfc383ad Akinobu Mita 2006-03-26 23 return fls(x); 2dfc383ad Akinobu Mita 2006-03-26 24 } d57594c20 Alexander van Heukelum 2008-03-15 25 #elif BITS_PER_LONG == 64
:::::: The code at line 22 was first introduced by commit :::::: 2dfc383ad587bbead84739a9ff9273df3eda983d [PATCH] bitops: generic fls64()
:::::: TO: Akinobu Mita <mita@miraclelinux.com> :::::: CC: Linus Torvalds <torvalds@g5.osdl.org>
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