linux-kernel - Re: [PATCH v3 8/9] xen/gntdev.c: Convert to use vm_map

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Message-ID: <201902142325.36JLmKBx%fengguang.wu@intel.com>
Date:   Thu, 14 Feb 2019 23:59:32 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Souptick Joarder <jrdr.linux@...il.com>
Cc:     kbuild-all@...org, akpm@...ux-foundation.org, willy@...radead.org,
        mhocko@...e.com, boris.ostrovsky@...cle.com, jgross@...e.com,
        linux@...linux.org.uk, robin.murphy@....com,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH v3 8/9] xen/gntdev.c: Convert to use vm_map_pages()

Hi Souptick,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.0-rc4 next-20190214]
[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/Souptick-Joarder/mm-Use-vm_map_pages-and-vm_map_pages_zero-API/20190214-213457
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/xen/gntdev.c: In function 'gntdev_mmap':
>> drivers/xen/gntdev.c:23:21: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long unsigned int' [-Wformat=]
    #define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt
                        ^~~~~~
   include/linux/dynamic_debug.h:127:35: note: in expansion of macro 'pr_fmt'
      __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
                                      ^~~~~~
   include/linux/printk.h:335:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~
   drivers/xen/gntdev.c:1091:2: note: in expansion of macro 'pr_debug'
     pr_debug("map %d+%d at %lx (pgoff %lx)\n",
     ^~~~~~~~

vim +23 drivers/xen/gntdev.c

ab31523c Gerd Hoffmann 2010-12-14  22  
283c0972 Joe Perches   2013-06-28 @23  #define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt
283c0972 Joe Perches   2013-06-28  24  

:::::: The code at line 23 was first introduced by commit
:::::: 283c0972d53769ee44750cad4c27e3f5fa26ec1f xen: Convert printks to pr_<level>

:::::: TO: Joe Perches <joe@...ches.com>
:::::: CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>

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

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