linux-kernel - [jgunthorpe:vfio_iommufd 28/29] drivers/vfio/vfio_main.c:618:6: warning: no previous prototype for 'vfio_assert_device

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Date:   Thu, 25 Aug 2022 01:16:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jgunthorpe:vfio_iommufd 28/29] drivers/vfio/vfio_main.c:618:6:
 warning: no previous prototype for 'vfio_assert_device_open'

tree:   https://github.com/jgunthorpe/linux vfio_iommufd
head:   d2ab4343c9f524e9404059830828188b0f8a15b6
commit: 5016830b7f1d1bf8af24d4ee80fc07a68d835af4 [28/29] vfio: Make vfio_container optionally compiled
config: sparc64-randconfig-r014-20220824 (https://download.01.org/0day-ci/archive/20220825/202208250108.KV0cgfXO-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 12.1.0
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/jgunthorpe/linux/commit/5016830b7f1d1bf8af24d4ee80fc07a68d835af4
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe vfio_iommufd
        git checkout 5016830b7f1d1bf8af24d4ee80fc07a68d835af4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc64 SHELL=/bin/bash drivers/vfio/

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

All warnings (new ones prefixed by >>):

>> drivers/vfio/vfio_main.c:618:6: warning: no previous prototype for 'vfio_assert_device_open' [-Wmissing-prototypes]
     618 | bool vfio_assert_device_open(struct vfio_device *device)
         |      ^~~~~~~~~~~~~~~~~~~~~~~


vim +/vfio_assert_device_open +618 drivers/vfio/vfio_main.c

cba3345cc494ad drivers/vfio/vfio.c      Alex Williamson 2012-07-31  616  
eadd86f835c637 drivers/vfio/vfio.c      Jason Gunthorpe 2022-05-11  617  /* true if the vfio_device has open_device() called but not close_device() */
79d394f0b0cd09 drivers/vfio/vfio_main.c Jason Gunthorpe 2022-02-18 @618  bool vfio_assert_device_open(struct vfio_device *device)
eadd86f835c637 drivers/vfio/vfio.c      Jason Gunthorpe 2022-05-11  619  {
eadd86f835c637 drivers/vfio/vfio.c      Jason Gunthorpe 2022-05-11  620  	return !WARN_ON_ONCE(!READ_ONCE(device->open_count));
eadd86f835c637 drivers/vfio/vfio.c      Jason Gunthorpe 2022-05-11  621  }
eadd86f835c637 drivers/vfio/vfio.c      Jason Gunthorpe 2022-05-11  622  

:::::: The code at line 618 was first introduced by commit
:::::: 79d394f0b0cd096e2eadbcc0e84b9035efa529c8 vfio: Move container code into vfio_container.c

:::::: TO: Jason Gunthorpe <jgg@...dia.com>
:::::: CC: Jason Gunthorpe <jgg@...dia.com>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp