linux-kernel - [PATCH 1/1] x86/iommu: remove useless code

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Message-Id: <1371448306-6884-1-git-send-email-zhen-hual@hp.com>
Date:	Mon, 17 Jun 2013 13:51:46 +0800
From:	"Li, Zhen-Hua" <zhen-hual@...com>
To:	David Woodhouse <dwmw2@...radead.org>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	<iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>
Cc:	"Li, Zhen-Hua" <zhen-hual@...com>
Subject: [PATCH 1/1] x86/iommu: remove useless code

From: "Li, Zhen-Hua" <zhen-hual@...com>

In intel-iommu.c, the function dma_pte_addr does not change the
value of its parameter (pte). So it is useless if it nobody catches
its return value.

Signed-off-by: Li, Zhen-Hua <zhen-hual@...com>
---
 drivers/iommu/intel-iommu.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index b4f0e28..d9d378b 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -809,7 +809,6 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
 				/* Someone else set it while we were thinking; use theirs. */
 				free_pgtable_page(tmp_page);
 			} else {
-				dma_pte_addr(pte);
 				domain_flush_cache(domain, pte, sizeof(*pte));
 			}
 		}
-- 
1.7.10.4

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