[intel-tdx:kvm-upstream-workaround 333/429] include/linux/memfile_notifier.h:93:13: error: 'memfile_unregister_notifier' defined but not used

[intel-tdx:kvm-upstream-workaround 333/429] include/linux/memfile_notifier.h:93:13: error: 'memfile_unregister_notifier' defined but not used

[kernel test robot]

tree:   https://github.com/intel/tdx.git kvm-upstream-workaround
head:   49c277ae966b45577acad5c6d98acba3d27d63af
commit: a46fd36366f3a53f0ea7385cdddef7d5e373edd0 [333/429] mm/shmem: Support memfile_notifier
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220527/202205271946.aUffZ0Xh-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/a46fd36366f3a53f0ea7385cdddef7d5e373edd0
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream-workaround
        git checkout a46fd36366f3a53f0ea7385cdddef7d5e373edd0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from include/linux/shmem_fs.h:12,
                    from drivers/gpu/drm/i915/gt/shmem_utils.c:9:
   include/linux/memfile_notifier.h:87:57: error: unknown type name 'flags'
      87 | static int memfile_register_notifier(struct file *file, flags,
         |                                                         ^~~~~
   In file included from include/linux/shmem_fs.h:12,
                    from drivers/gpu/drm/i915/gt/shmem_utils.c:9:
>> include/linux/memfile_notifier.h:93:13: error: 'memfile_unregister_notifier' defined but not used [-Werror=unused-function]
      93 | static void memfile_unregister_notifier(struct memfile_notifier *notifier)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/memfile_notifier.h:82:13: error: 'memfile_notifier_invalidate' defined but not used [-Werror=unused-function]
      82 | static void memfile_notifier_invalidate(struct memfile_node *node,
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/memfile_notifier.h:77:13: error: 'memfile_notifier_populate' defined but not used [-Werror=unused-function]
      77 | static void memfile_notifier_populate(struct memfile_node *node,
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/memfile_notifier.h:72:12: error: 'memfile_node_set_flags' defined but not used [-Werror=unused-function]
      72 | static int memfile_node_set_flags(struct file *file, unsigned long flags)
         |            ^~~~~~~~~~~~~~~~~~~~~~
>> include/linux/memfile_notifier.h:68:13: error: 'memfile_register_backing_store' defined but not used [-Werror=unused-function]
      68 | static void memfile_register_backing_store(struct memfile_backing_store *bs)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/memfile_unregister_notifier +93 include/linux/memfile_notifier.h

07b4263e3099f77 Chao Peng 2022-01-12  66  
07b4263e3099f77 Chao Peng 2022-01-12  67  #else /* !CONFIG_MEMFILE_NOTIFIER */
07b4263e3099f77 Chao Peng 2022-01-12 @68  static void memfile_register_backing_store(struct memfile_backing_store *bs)
07b4263e3099f77 Chao Peng 2022-01-12  69  {
07b4263e3099f77 Chao Peng 2022-01-12  70  }
07b4263e3099f77 Chao Peng 2022-01-12  71  
07b4263e3099f77 Chao Peng 2022-01-12 @72  static int memfile_node_set_flags(struct file *file, unsigned long flags)
07b4263e3099f77 Chao Peng 2022-01-12  73  {
07b4263e3099f77 Chao Peng 2022-01-12  74  	return -EOPNOTSUPP;
07b4263e3099f77 Chao Peng 2022-01-12  75  }
07b4263e3099f77 Chao Peng 2022-01-12  76  
07b4263e3099f77 Chao Peng 2022-01-12 @77  static void memfile_notifier_populate(struct memfile_node *node,
07b4263e3099f77 Chao Peng 2022-01-12  78  				      pgoff_t start, pgoff_t end)
07b4263e3099f77 Chao Peng 2022-01-12  79  {
07b4263e3099f77 Chao Peng 2022-01-12  80  }
07b4263e3099f77 Chao Peng 2022-01-12  81  
07b4263e3099f77 Chao Peng 2022-01-12 @82  static void memfile_notifier_invalidate(struct memfile_node *node,
07b4263e3099f77 Chao Peng 2022-01-12  83  					pgoff_t start, pgoff_t end)
07b4263e3099f77 Chao Peng 2022-01-12  84  {
07b4263e3099f77 Chao Peng 2022-01-12  85  }
07b4263e3099f77 Chao Peng 2022-01-12  86  
07b4263e3099f77 Chao Peng 2022-01-12  87  static int memfile_register_notifier(struct file *file, flags,
07b4263e3099f77 Chao Peng 2022-01-12  88  				     struct memfile_notifier *notifier)
07b4263e3099f77 Chao Peng 2022-01-12  89  {
07b4263e3099f77 Chao Peng 2022-01-12  90  	return -EOPNOTSUPP;
07b4263e3099f77 Chao Peng 2022-01-12  91  }
07b4263e3099f77 Chao Peng 2022-01-12  92  
07b4263e3099f77 Chao Peng 2022-01-12 @93  static void memfile_unregister_notifier(struct memfile_notifier *notifier)
07b4263e3099f77 Chao Peng 2022-01-12  94  {
07b4263e3099f77 Chao Peng 2022-01-12  95  }
07b4263e3099f77 Chao Peng 2022-01-12  96  

:::::: The code at line 93 was first introduced by commit
:::::: 07b4263e3099f776c35284155851f0e202b12a44 mm: Introduce memfile_notifier

:::::: TO: Chao Peng <chao.p.peng@linux.intel.com>
:::::: CC: Isaku Yamahata <isaku.yamahata@intel.com>

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