[intel-gvt-linux:topic/gvt-xengt 35/43] drivers/gpu/drm/i915/gvt/xengt.c:1837:24: error: initialization from incompatible pointer type

[kbuild test robot]

tree:   https://github.com/intel/gvt-linux topic/gvt-xengt
head:   54acef46af0ae520ee8362b1c73686c2d867a159
commit: 8ba9583f9297eb9e52799b132d4344782e98c2f7 [35/43] drm/i915/gvt/xengt: Impliment mpt->dma_map/unmap_guest_page
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        git checkout 8ba9583f9297eb9e52799b132d4344782e98c2f7
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/i915/gvt/xengt.c:60:16: sparse: symbol 'gvt_ctrl_kobj' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:64:21: sparse: symbol 'xengt_priv' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:117:24: sparse: symbol 'xengt_kobj_sysfs_ops' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:431:5: sparse: symbol 'xengt_sysfs_init' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:470:6: sparse: symbol 'xengt_sysfs_del' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:596:38: sparse: expression using sizeof(void)
   drivers/gpu/drm/i915/gvt/xengt.c:596:38: sparse: expression using sizeof(void)
   drivers/gpu/drm/i915/gvt/xengt.c:1837:31: sparse: incorrect type in initializer (incompatible argument 3 (different base types))
   drivers/gpu/drm/i915/gvt/xengt.c:1837:31:    expected int ( *dma_map_guest_page )( ... )
   drivers/gpu/drm/i915/gvt/xengt.c:1837:31:    got int ( *<noident> )( ... )
>> drivers/gpu/drm/i915/gvt/xengt.c:1837:24: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .dma_map_guest_page = xengt_dma_map_guest_page,
                           ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/i915/gvt/xengt.c:1837:24: note: (near initialization for 'xengt_mpt.dma_map_guest_page')
   cc1: some warnings being treated as errors

sparse warnings: (new ones prefixed by >>)

   drivers/gpu/drm/i915/gvt/xengt.c:60:16: sparse: symbol 'gvt_ctrl_kobj' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:64:21: sparse: symbol 'xengt_priv' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:117:24: sparse: symbol 'xengt_kobj_sysfs_ops' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:431:5: sparse: symbol 'xengt_sysfs_init' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:470:6: sparse: symbol 'xengt_sysfs_del' was not declared. Should it be static?
   drivers/gpu/drm/i915/gvt/xengt.c:596:38: sparse: expression using sizeof(void)
   drivers/gpu/drm/i915/gvt/xengt.c:596:38: sparse: expression using sizeof(void)
>> drivers/gpu/drm/i915/gvt/xengt.c:1837:31: sparse: incorrect type in initializer (incompatible argument 3 (different base types)) @@    expected int ( *dma_map_guest_page )( ... ) @@    got int ( *dma_map_guest_page )( ... ) @@
   drivers/gpu/drm/i915/gvt/xengt.c:1837:31:    expected int ( *dma_map_guest_page )( ... )
   drivers/gpu/drm/i915/gvt/xengt.c:1837:31:    got int ( *<noident> )( ... )
   drivers/gpu/drm/i915/gvt/xengt.c:1837:24: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .dma_map_guest_page = xengt_dma_map_guest_page,
                           ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/i915/gvt/xengt.c:1837:24: note: (near initialization for 'xengt_mpt.dma_map_guest_page')
   cc1: some warnings being treated as errors

vim +1837 drivers/gpu/drm/i915/gvt/xengt.c

  1823	
  1824	struct intel_gvt_mpt xengt_mpt = {
  1825		//.detect_host = xengt_detect_host,
  1826		.host_init = xengt_host_init,
  1827		.host_exit = xengt_host_exit,
  1828		.attach_vgpu = xengt_attach_vgpu,
  1829		.detach_vgpu = xengt_detach_vgpu,
  1830		.inject_msi = xengt_inject_msi,
  1831		.from_virt_to_mfn = xengt_virt_to_mfn,
  1832		.enable_page_track = xengt_page_track_add,
  1833		.disable_page_track = xengt_page_track_remove,
  1834		.read_gpa = xengt_read_gpa,
  1835		.write_gpa = xengt_write_gpa,
  1836		.gfn_to_mfn = xengt_gfn_to_pfn,
> 1837		.dma_map_guest_page = xengt_dma_map_guest_page,
  1838		.dma_unmap_guest_page = xengt_dma_unmap_guest_page,
  1839		.map_gfn_to_mfn = xengt_map_gfn_to_mfn,
  1840		.set_trap_area = xengt_set_trap_area,
  1841	};
  1842	EXPORT_SYMBOL_GPL(xengt_mpt);
  1843	

---
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