if (fromsize == tosize) /* E.g., from 512 to 512. */
return blocks;
else if (fromsize > tosize) /* E.g., from 2048 to 512. */
if (fromsize == tosize) /* E.g., from 512 to 512. */
return blocks;
else if (fromsize > tosize) /* E.g., from 2048 to 512. */