xen: don't map missing memory
authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Tue, 31 Aug 2010 21:06:22 +0000 (14:06 -0700)
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Fri, 22 Oct 2010 19:57:26 +0000 (12:57 -0700)
commitcfd8951e082a589637f9de3c33efd3218fdb3c03
treee4b55dc7c0aa6dce4e022d1162abfd2633758720
parent33a847502b0338351cebd8fc0c68ac796cfadbbd
xen: don't map missing memory

When setting up a pte for a missing pfn (no matching mfn), just create
an empty pte rather than a junk mapping.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
arch/x86/include/asm/xen/page.h
arch/x86/xen/mmu.c