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xen: check for zero sized area when invalidating memory 

With the introduction of the linear mapped p2m list setting memory
areas to "invalid" had to be delayed. When doing the invalidation
make sure no zero sized areas are processed.

Signed-off-by: Juegren Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Juergen Gross 2015-01-12 06:05:10 +01:00 committed by David Vrabel
parent e86f949667
commit 9a17ad7f3d
1 changed files with 2 additions and 0 deletions
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2
arch/x86/xen/setup.c
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@ -160,6 +160,8 @@ void __init xen_inv_extra_mem(void)
int i;
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
if (!xen_extra_mem[i].size)
continue;
pfn_s = PFN_DOWN(xen_extra_mem[i].start);
pfn_e = PFN_UP(xen_extra_mem[i].start + xen_extra_mem[i].size);
for (pfn = pfn_s; pfn < pfn_e; pfn++)