linux-kernel - [PATCH 3/3] xen: Clear PG_pinned in release

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Message-Id: <1206722297-11763-4-git-send-email-markmc@redhat.com>
Date:	Fri, 28 Mar 2008 16:38:17 +0000
From:	Mark McLoughlin <markmc@...hat.com>
To:	jeremy@...p.org
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu,
	xen-devel@...ts.xensource.com, Mark McLoughlin <markmc@...hat.com>
Subject: [PATCH 3/3] xen: Clear PG_pinned in release_{pte,pmd}()

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@...hat.com>
---
 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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