linux-kernel - Re: [PATCH v3 2/3] misc/pvpanic: probe multiple instances

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Date:   Sat, 13 Feb 2021 10:02:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mihai Carabas <mihai.carabas@...cle.com>,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        gregkh@...uxfoundation.org, arnd@...db.de, rdunlap@...radead.org,
        bobo.shaobowang@...wei.com,
        Mihai Carabas <mihai.carabas@...cle.com>
Subject: Re: [PATCH v3 2/3] misc/pvpanic: probe multiple instances

Hi Mihai,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on soc/for-next linus/master v5.11-rc7]
[cannot apply to char-misc/char-misc-testing next-20210211]
[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/Mihai-Carabas/misc-pvpanic-split-up-generic-and-platform-dependent-code/20210213-043307
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2ab38c17aac10bf55ab3efde4c4db3893d8691d2
config: x86_64-randconfig-r012-20210209 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/70eed71fbb1f23b28a401213c2dac3c27fcae323
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Mihai-Carabas/misc-pvpanic-split-up-generic-and-platform-dependent-code/20210213-043307
        git checkout 70eed71fbb1f23b28a401213c2dac3c27fcae323
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   drivers/misc/pvpanic/pvpanic.c:62:5: warning: no previous prototype for function 'pvpanic_probe' [-Wmissing-prototypes]
   int pvpanic_probe(void __iomem *pbase)
       ^
   drivers/misc/pvpanic/pvpanic.c:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int pvpanic_probe(void __iomem *pbase)
   ^
   static 
>> drivers/misc/pvpanic/pvpanic.c:87:3: error: void function 'pvpanic_remove' should not return a value [-Wreturn-type]
                   return -EINVAL;
                   ^      ~~~~~~~
   drivers/misc/pvpanic/pvpanic.c:82:6: warning: no previous prototype for function 'pvpanic_remove' [-Wmissing-prototypes]
   void pvpanic_remove(void __iomem *pbase)
        ^
   drivers/misc/pvpanic/pvpanic.c:82:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void pvpanic_remove(void __iomem *pbase)
   ^
   static 
   2 warnings and 1 error generated.


vim +/pvpanic_remove +87 drivers/misc/pvpanic/pvpanic.c

    61	
  > 62	int pvpanic_probe(void __iomem *pbase)
    63	{
    64		struct pvpanic_instance *pi;
    65	
    66		if(!pbase)
    67			return -EINVAL;
    68	
    69		pi = kmalloc(sizeof(*pi), GFP_ATOMIC);
    70		if (!pi)
    71			return -ENOMEM;
    72	
    73		pi->base = pbase;
    74		spin_lock(&pvpanic_lock);
    75		list_add(&pi->list, &pvpanic_list);
    76		spin_unlock(&pvpanic_lock);
    77	
    78		return 0;
    79	}
    80	EXPORT_SYMBOL_GPL(pvpanic_probe);
    81	
    82	void pvpanic_remove(void __iomem *pbase)
    83	{
    84		struct pvpanic_instance *pi_cur, *pi_next;
    85	
    86		if(!pbase)
  > 87			return -EINVAL;
    88	
    89		spin_lock(&pvpanic_lock);
    90		list_for_each_entry_safe(pi_cur, pi_next, &pvpanic_list, list) {
    91			if (pi_cur->base == pbase) {
    92				list_del(&pi_cur->list);
    93				kfree(pi_cur);
    94				break;
    95			}
    96		}
    97		spin_unlock(&pvpanic_lock);
    98	}
    99	EXPORT_SYMBOL_GPL(pvpanic_remove);
   100	

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

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