On 8/9/07, H. Peter Anvin <[EMAIL PROTECTED]> wrote: > > No. There is no requirement that the pointer is page-aligned. The last > page of the address space is (in the Linux kernel) invalid by > definition, so there are in effect three kinds of pointers in the Linux > kernel: valid pointers, NULL, and ERR_PTR()s. > > -hpa >
Regarding "The last page of the address space is invalid by definition", I am wondering why do we define the last page as invalid. The reason for defining this is just because we want to take use of the error number handling? Regards Jason - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
