On Mon, Oct 26, 2020 at 8:56 PM Xie He [off-list ref] wrote:

quoted

-  for (mem = (HDW *) memmap; mem < (HDW *) (memmap + 1); ++mem)
+  for (mem = (HDW *) memmap; mem < (HDW *) ((uintptr_t)memmap + 1); ++mem)

Note that these two lines are semantically different. In the first line,
"+ 1" moves the pointer by (sizeof memmap) bytes. However in the second
line, "+ 1" moves the pointer by only 1 byte.

Correction: in the first line "+ 1" moves the pointer by (sizeof *memmap) bytes.