diff options
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2011-04-12 12:19:49 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-05-02 16:33:52 -0400 |
| commit | b9269dc7bfdf8c985971c09f2dcb2aa04ad7986d (patch) | |
| tree | 72c8c5cb8c49c02d304255eafa25eba5fa03292a | |
| parent | a38647837a411f7df79623128421eef2118b5884 (diff) | |
| download | lwn-b9269dc7bfdf8c985971c09f2dcb2aa04ad7986d.tar.gz lwn-b9269dc7bfdf8c985971c09f2dcb2aa04ad7986d.zip | |
xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf_top
mask_rw_pte is currently checking if a pfn is a pagetable page if it
falls in the range pgt_buf_start - pgt_buf_end but that is incorrect
because pgt_buf_end is a moving target: pgt_buf_top is the real
boundary.
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | arch/x86/xen/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 1bca25f60ff2..55c965b38c27 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1616,7 +1616,7 @@ static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte) * it is RO. */ if (((!is_early_ioremap_ptep(ptep) && - pfn >= pgt_buf_start && pfn < pgt_buf_end)) || + pfn >= pgt_buf_start && pfn < pgt_buf_top)) || (is_early_ioremap_ptep(ptep) && pfn != (pgt_buf_end - 1))) pte = pte_wrprotect(pte); |