message: Simplify alignment check in posix_memalign()
diff: @@ -643,13 +643,9 @@ pub unsafe extern "C" fn posix_memalign(
  alignment: size_t,
  size: size_t,
  ) -> c_int {
  - const void_ptr_size: usize = mem::size_of::<*mut c_void>();
  + const VOID_PTR_SIZE: usize = mem::size_of::<*mut c_void>();
  - /* Check that alignment is:
  - * a) a multiple of sizeof(void *)
  - * b) a power-of-two multiple of sizeof(void *). Integer division as
  - * below gives the correct result once a) is ensured. */
  - if alignment % void_ptr_size == 0 && (alignment / void_ptr_size).is_power_of_two() {
  + if alignment % VOID_PTR_SIZE == 0 && alignment.is_power_of_two() {
  let ptr = platform::alloc_align(size, alignment);
  if !ptr.is_null() {
  *memptr = ptr;
  