> It appears the kernel is trusting that ->physical_addr_mask is non-zero > in other paths. So this is at least equally broken in the presence of a > broken BIOS. The impact is potentially larger though with this change, > so it might be a good follow-on patch to make sure that > ->physical_addr_mask gets fixed up to a minimum mask value.
Agreed. Separate patch to sanitize early, so other kernel code can just use it. -Tony
