filemap_range_needs_writeback
if (filemap_range_needs_writeback(inode->i_mapping,
if (filemap_range_needs_writeback(inode->vfs_inode.i_mapping,
range_dirty = filemap_range_needs_writeback(mapping, iter.pos,
if (filemap_range_needs_writeback(mapping, offset,
if (filemap_range_needs_writeback(mapping, pos, end))