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

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Date:	Wed,  2 Apr 2008 15:36:38 +0100
From:	Mark McLoughlin <markmc@...hat.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	xen-devel@...ts.xensource.com,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mark McLoughlin <markmc@...hat.com>
Subject: [PATCH 3/3] xen: Clear PG_pinned in release_{pt,pd}()

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 f16b056..27ee26a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -717,6 +717,7 @@ 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);
 	}
 }
 
-- 
1.5.4.5

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