linux-kernel - Re: [PATCH v2 1/7] vhost: Add a new modparam to allow userspace select vhost

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Message-ID: <202410052351.1dCg9uLx-lkp@intel.com>
Date: Sat, 5 Oct 2024 23:42:49 +0800
From: kernel test robot <lkp@...el.com>
To: Cindy Lu <lulu@...hat.com>, jasowang@...hat.com, mst@...hat.com,
	michael.christie@...cle.com, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Cc: oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH v2 1/7] vhost: Add a new modparam to allow userspace
 select vhost_task

Hi Cindy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on mst-vhost/linux-next]
[also build test WARNING on linus/master v6.12-rc1 next-20241004]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Cindy-Lu/vhost-Add-a-new-modparam-to-allow-userspace-select-vhost_task/20241004-100307
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
patch link:    https://lore.kernel.org/r/20241004015937.2286459-2-lulu%40redhat.com
patch subject: [PATCH v2 1/7] vhost: Add a new modparam to allow userspace select vhost_task
config: x86_64-randconfig-122-20241005 (https://download.01.org/0day-ci/archive/20241005/202410052351.1dCg9uLx-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241005/202410052351.1dCg9uLx-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410052351.1dCg9uLx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/vhost/vhost.c:44:6: sparse: sparse: symbol 'enforce_inherit_owner' was not declared. Should it be static?
   drivers/vhost/vhost.c:1899:54: sparse: sparse: self-comparison always evaluates to false
   drivers/vhost/vhost.c:1900:54: sparse: sparse: self-comparison always evaluates to false
   drivers/vhost/vhost.c:1901:55: sparse: sparse: self-comparison always evaluates to false
   drivers/vhost/vhost.c:2156:46: sparse: sparse: self-comparison always evaluates to false
   drivers/vhost/vhost.c:2236:48: sparse: sparse: self-comparison always evaluates to false
   drivers/vhost/vhost.c: note: in included file (through include/linux/wait.h, include/linux/eventfd.h):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true

vim +/enforce_inherit_owner +44 drivers/vhost/vhost.c

    35	
    36	static ushort max_mem_regions = 64;
    37	module_param(max_mem_regions, ushort, 0444);
    38	MODULE_PARM_DESC(max_mem_regions,
    39		"Maximum number of memory regions in memory map. (default: 64)");
    40	static int max_iotlb_entries = 2048;
    41	module_param(max_iotlb_entries, int, 0444);
    42	MODULE_PARM_DESC(max_iotlb_entries,
    43		"Maximum number of iotlb entries. (default: 2048)");
  > 44	bool enforce_inherit_owner = true;
    45	module_param(enforce_inherit_owner, bool, 0444);
    46	MODULE_PARM_DESC(enforce_inherit_owner,
    47			 "enforce vhost use vhost_task(default: Y)");
    48	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki