FDT_ALIGN_SIZE
new_fdt = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
new_fdt_align = PTR_ALIGN(new_fdt, FDT_ALIGN_SIZE);
void *unittest_data __free(kfree) = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);