[PATCH for-next 4/6] xen: Fix build when !CONFIG_GRANT_TABLE

[Connor Davis <connojdavis@xxxxxxxxx>]

Declare struct grant_table {}; in grant_table.h when
!CONFIG_GRANT_TABLE. This fixes the following:

/build/xen/include/xen/grant_table.h:84:50: error: 'struct grant_table'
declared inside parameter list will not be visible outside of this
definition or declaration [-Werror]
   84 | static inline int mem_sharing_gref_to_gfn(struct grant_table *gt,
      |

Signed-off-by: Connor Davis <connojdavis@xxxxxxxxx>
---
 xen/include/xen/grant_table.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/include/xen/grant_table.h b/xen/include/xen/grant_table.h
index 63b6dc78f4..0e5f6f85c7 100644
--- a/xen/include/xen/grant_table.h
+++ b/xen/include/xen/grant_table.h
@@ -66,6 +66,8 @@ int gnttab_acquire_resource(
 
 #define opt_max_grant_frames 0
 
+struct grant_table {};
+
 static inline int grant_table_init(struct domain *d,
                                    int max_grant_frames,
                                    int max_maptrack_frames)
-- 
2.27.0