linux-kernel - Re: [PATCH 3/3] block: Change simple

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Date:   Fri, 22 Jun 2018 19:45:51 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Kitone Elvis Peter <elviskitone@...il.com>
Cc:     kbuild-all@...org, axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] block: Change simple_strtol() to kstrtol()

Hi Kitone,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on v4.17]
[cannot apply to linus/master block/for-next v4.18-rc1 next-20180622]
[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/Kitone-Elvis-Peter/block-Use-SPDX-License-Identifier/20180622-192459
config: x86_64-randconfig-x007-201824 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/posix_types.h:5:0,
                    from include/uapi/linux/types.h:14,
                    from include/linux/compiler.h:169,
                    from include/linux/init.h:5,
                    from drivers//block/brd.c:12:
   drivers//block/brd.c: In function 'ramdisk_size':
>> include/linux/stddef.h:8:14: warning: passing argument 2 of 'kstrtol' makes integer from pointer without a cast [-Wint-conversion]
    #define NULL ((void *)0)
                 ^
>> drivers//block/brd.c:354:25: note: in expansion of macro 'NULL'
     rd_size = kstrtol(str, NULL, 0);
                            ^~~~
   In file included from include/linux/list.h:9:0,
                    from include/linux/module.h:9,
                    from drivers//block/brd.c:14:
   include/linux/kernel.h:361:32: note: expected 'unsigned int' but argument is of type 'void *'
    static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
                                   ^~~~~~~
--
   In file included from include/uapi/linux/posix_types.h:5:0,
                    from include/uapi/linux/types.h:14,
                    from include/linux/compiler.h:169,
                    from include/linux/init.h:5,
                    from drivers/block/brd.c:12:
   drivers/block/brd.c: In function 'ramdisk_size':
>> include/linux/stddef.h:8:14: warning: passing argument 2 of 'kstrtol' makes integer from pointer without a cast [-Wint-conversion]
    #define NULL ((void *)0)
                 ^
   drivers/block/brd.c:354:25: note: in expansion of macro 'NULL'
     rd_size = kstrtol(str, NULL, 0);
                            ^~~~
   In file included from include/linux/list.h:9:0,
                    from include/linux/module.h:9,
                    from drivers/block/brd.c:14:
   include/linux/kernel.h:361:32: note: expected 'unsigned int' but argument is of type 'void *'
    static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
                                   ^~~~~~~

vim +/kstrtol +8 include/linux/stddef.h

^1da177e Linus Torvalds   2005-04-16  6  
^1da177e Linus Torvalds   2005-04-16  7  #undef NULL
^1da177e Linus Torvalds   2005-04-16 @8  #define NULL ((void *)0)
6e218287 Richard Knutsson 2006-09-30  9  

:::::: The code at line 8 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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