Can't we simply use signed arithmetic here? This expression works fine
if the quantities are all interpreted as s64 instead of u64

I was thinking about that, but I do not like the idea of using sign
arithmetics for physical addresses. Also, I am worried that someone in
the future will unknowingly change it to unsigns or to phys_addr_t. It
is safer to have start explicitly set to 0 in case of wrap.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel