[Xen-devel] [PATCH 3/3] xen: Clear PG_pinned in release_{pte, pmd}()

[Mark McLoughlin <markmc@xxxxxxxxxx>]

We don't currently clear PG_pinned in release_pt(),
probably because the page is to be freed anyway,
but it jumps out as an obvious gap in the logic
so add clear the flag for consistency sake.

Signed-off-by: Mark McLoughlin <markmc@xxxxxxxxxx>
---
 arch/x86/xen/enlighten.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 0ce225f..8c5ff24 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -719,6 +719,7 @@ static void xen_release_ptpage(u32 pfn, unsigned level)
                                pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
                        make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
                }
+               ClearPagePinned(page);
        }
 }
 
-- 
1.5.4.1


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