linux-kernel - [PATCH] intel-iommu: fix up comment

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Message-ID: <1458757421-4058-1-git-send-email-mst@redhat.com>
Date:	Wed, 23 Mar 2016 20:34:19 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Joerg Roedel <joro@...tes.org>,
	iommu@...ts.linux-foundation.org
Subject: [PATCH] intel-iommu: fix up comment

dma_pte_free_pagetable no longer depends on
last level ptes being clear, it clears them itself.
Fix up the comment to match.

Cc: Jiang Liu <jiang.liu@...ux.intel.com>
Suggested-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/iommu/intel-iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a2e1b7f..0100553 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1143,7 +1143,7 @@ next:
 	} while (!first_pte_in_page(++pte) && pfn <= last_pfn);
 }
 
-/* free page table pages. last level pte should already be cleared */
+/* clear last level (leaf) ptes and free page table pages. */
 static void dma_pte_free_pagetable(struct dmar_domain *domain,
 				   unsigned long start_pfn,
 				   unsigned long last_pfn)
-- 
MST