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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-05-21 10:12:39 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-05-21 10:12:39 -0400 |
| commit | b3f87b98aa3dc22cc58f970140113b270015cddb (patch) | |
| tree | c4aec5996567ad96310f61e9244e799f41bf2625 /arch/x86/xen/mmu.c | |
| parent | 041245c88a29273788e8eff1353bc6e1f56c61df (diff) | |
| parent | 1afeaf5c29aa07db25760d2fbed5c08a3aec3498 (diff) | |
Merge branch 'bugfixes' into nfs-for-next
Diffstat (limited to 'arch/x86/xen/mmu.c')
| -rw-r--r-- | arch/x86/xen/mmu.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index b8e279479a6..69f5857660a 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -353,8 +353,13 @@ static pteval_t pte_mfn_to_pfn(pteval_t val) { if (val & _PAGE_PRESENT) { unsigned long mfn = (val & PTE_PFN_MASK) >> PAGE_SHIFT; + unsigned long pfn = mfn_to_pfn(mfn); + pteval_t flags = val & PTE_FLAGS_MASK; - val = ((pteval_t)mfn_to_pfn(mfn) << PAGE_SHIFT) | flags; + if (unlikely(pfn == ~0)) + val = flags & ~_PAGE_PRESENT; + else + val = ((pteval_t)pfn << PAGE_SHIFT) | flags; } return val; |