On Wed, Feb 1, 2017 at 1:15 AM, Ingo Molnar [off-list ref] wrote:

* Thomas Garnier [off-list ref] wrote:

quoted

This patch makes the GDT remapped pages read-only to prevent corruption.
This change is done only on 64 bit.

quoted

-     table_base = gdt->address;
+     table_base = (unsigned long)get_current_direct_gdt();

Instead of spreading these type casts far and wide please introduce another
accessor the returns 'unsigned long':

        get_cpu_gdt_rw_vaddr()

That whole function is an abomination.  How about replacing 'unsigned
long table_base' with 'struct desc_struct *table'?  If you're feeling
really adventurous, *delete* that function and replace all of its
users with something sane.

--Andy