[Xen-changelog] [xen-unstable] [IA64] Fix dom0vp_expose_p2m

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxxx
# Date 1167952951 25200
# Node ID 4ef56c7cce12844c3a728553b8fa4c2bb67efc88
# Parent  b1c00767c6ae8c383c9fb9dcd92e7acc3467ee95
[IA64] Fix dom0vp_expose_p2m

dom0vp_expose_p2m() assumes that memory is populated non-sparsely.
However with dom0 builder modification this assumption is not always true.
Make dom0vp_expose_p2m() allow sparsely populated memory.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 xen/arch/ia64/xen/mm.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff -r b1c00767c6ae -r 4ef56c7cce12 xen/arch/ia64/xen/mm.c
--- a/xen/arch/ia64/xen/mm.c    Thu Jan 04 16:17:37 2007 -0700
+++ b/xen/arch/ia64/xen/mm.c    Thu Jan 04 16:22:31 2007 -0700
@@ -1439,10 +1439,9 @@ dom0vp_expose_p2m(struct domain* d,
     for (i = 0; i < expose_num_pfn / PTRS_PER_PTE + 1; i++) {
         assign_pte = lookup_noalloc_domain_pte(d, (assign_start_gpfn + i) <<
                                                PAGE_SHIFT);
-        BUG_ON(assign_pte == NULL);
-        if (pte_present(*assign_pte)) {
+        if (assign_pte == NULL || pte_present(*assign_pte))
             continue;
-        }
+
         if (expose_p2m_page(d, (assign_start_gpfn + i) << PAGE_SHIFT,
                             p2m_pte_zero_page) < 0) {
             gdprintk(XENLOG_INFO, "%s failed to assign zero-pte page\n", 
__func__);

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