linux-kernel - Re: [PATCH v3 1/3] riscv: optimized memcpy

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Message-ID: <202106182106.ppHo0QEy-lkp@intel.com>
Date:   Fri, 18 Jun 2021 22:06:03 +0800
From:   kernel test robot <lkp@...el.com>
To:     Matteo Croce <mcroce@...ux.microsoft.com>,
        linux-riscv@...ts.infradead.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>,
        Emil Renner Berthing <kernel@...il.dk>,
        Akira Tsukamoto <akira.tsukamoto@...il.com>,
        Drew Fustini <drew@...gleboard.org>
Subject: Re: [PATCH v3 1/3] riscv: optimized memcpy

Hi Matteo,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linux/master]
[also build test WARNING on linus/master v5.13-rc6 next-20210617]
[cannot apply to atish-riscv-linux/topo_v3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Matteo-Croce/riscv-optimized-mem-functions/20210617-232934
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dd860052c99b1e088352bdd4fb7aef46f8d2ef47
config: riscv-randconfig-r031-20210618 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/0day-ci/linux/commit/c35a3474b6782645ff0695db1f30be0e8123c131
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Matteo-Croce/riscv-optimized-mem-functions/20210617-232934
        git checkout c35a3474b6782645ff0695db1f30be0e8123c131
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/riscv/lib/string.c:90:57: warning: attribute declaration must precede definition [-Wignored-attributes]
   void *memcpy(void *dest, const void *src, size_t count) __weak __alias(__memcpy);
                                                           ^
   include/linux/compiler_attributes.h:291:56: note: expanded from macro '__weak'
   #define __weak                          __attribute__((__weak__))
                                                          ^
   include/linux/fortify-string.h:178:24: note: previous definition is here
   __FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
                          ^
   1 warning generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT


vim +90 arch/riscv/lib/string.c

    89	
  > 90	void *memcpy(void *dest, const void *src, size_t count) __weak __alias(__memcpy);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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