mm/filemap.c:580: warning: No description found for return value of 'filemap_fdatawait_range_keep_errors'
mm/filemap.c:4238: warning: No description found for return value of 'filemap_invalidate_inode'
mm/filemap.c:580: warning: No description found for return value of 'filemap_fdatawait_range_keep_errors'
mm/filemap.c:4238: warning: No description found for return value of 'filemap_invalidate_inode'