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Date:   Tue, 19 Apr 2022 06:58:34 +0800
From:   kernel test robot <lkp@intel.com>
To:     Tom Rix <trix@redhat.com>, nsaenz@kernel.org,
        bcm-kernel-feedback-list@broadcom.com, gregkh@linuxfoundation.org,
        stefan.wahren@i2se.com, gascoar@gmail.com, ojaswin98@gmail.com
Cc:     kbuild-all@lists.01.org, linux-rpi-kernel@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
        Tom Rix <trix@redhat.com>
Subject: Re: [PATCH] staging: vchiq_arm: change vchiq_platform_init from
 global to static
Message-ID: <202204190650.yy0x0YCl-lkp@intel.com>
References: <20220418164356.3532969-1-trix@redhat.com>
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In-Reply-To: <20220418164356.3532969-1-trix@redhat.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
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Hi Tom,

I love your patch! Perhaps something to improve:

[auto build test WARNING on staging/staging-testing]

url:    https://github.com/intel-lab-lkp/linux/commits/Tom-Rix/staging-vchiq_arm-change-vchiq_platform_init-from-global-to-static/20220419-004611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git bed6d200f8ca38e1ecbdd8fb7e0564884002abd1
config: sparc-randconfig-c004-20220417 (https://download.01.org/0day-ci/archive/20220419/202204190650.yy0x0YCl-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 11.2.0
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
        # https://github.com/intel-lab-lkp/linux/commit/192ca8cdfd692f17162557c64e8d533c816eccff
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tom-Rix/staging-vchiq_arm-change-vchiq_platform_init-from-global-to-static/20220419-004611
        git checkout 192ca8cdfd692f17162557c64e8d533c816eccff
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=sparc SHELL=/bin/bash drivers/staging/vc04_services/

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/string.h:20,
                    from include/linux/bitmap.h:11,
                    from include/linux/cpumask.h:12,
                    from include/linux/mm_types_task.h:14,
                    from include/linux/mm_types.h:5,
                    from include/linux/buildid.h:5,
                    from include/linux/module.h:14,
                    from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:8:
   In function 'memcpy_to_page',
       inlined from 'free_pagelist' at drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:434:4:
>> arch/sparc/include/asm/string.h:15:25: warning: argument 2 null where non-null expected [-Wnonnull]
      15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/highmem.h:353:9: note: in expansion of macro 'memcpy'
     353 |         memcpy(to + offset, from, len);
         |         ^~~~~~
   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c: In function 'free_pagelist':
   arch/sparc/include/asm/string.h:15:25: note: in a call to built-in function '__builtin_memcpy'
      15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/highmem.h:353:9: note: in expansion of macro 'memcpy'
     353 |         memcpy(to + offset, from, len);
         |         ^~~~~~
   In function 'memcpy_to_page',
       inlined from 'free_pagelist' at drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:441:4:
   arch/sparc/include/asm/string.h:15:25: warning: '__builtin_memcpy' offset 0 is out of the bounds [0, 0] [-Warray-bounds]
      15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/highmem.h:353:9: note: in expansion of macro 'memcpy'
     353 |         memcpy(to + offset, from, len);
         |         ^~~~~~


vim +15 arch/sparc/include/asm/string.h

70a6fcf3283a0a Al Viro 2016-01-17  13  
70a6fcf3283a0a Al Viro 2016-01-17  14  #define __HAVE_ARCH_MEMCPY
70a6fcf3283a0a Al Viro 2016-01-17 @15  #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
70a6fcf3283a0a Al Viro 2016-01-17  16  

-- 
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