linux-kernel - [PATCH 20/23] AMD IOMMU: remove unnecessary cast to u64 in the init code

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Date:	Wed, 17 Sep 2008 18:52:54 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	linux-kernel@...r.kernel.org
CC:	iommu@...ts.linux-foundation.org,
	Joerg Roedel <jroedel@...my.amd.com>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 20/23] AMD IOMMU: remove unnecessary cast to u64 in the init code

From: Joerg Roedel <jroedel@...my.amd.com>

The ctrl variable is only u32 and readl also returns a 32 bit value. So
the cast to u64 is pointless. Remove it with this patch.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kernel/amd_iommu_init.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index a307cf6..b876499 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -236,7 +236,7 @@ static void __init iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
 {
 	u32 ctrl;
 
-	ctrl = (u64)readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
+	ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
 	ctrl &= ~(1 << bit);
 	writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
 }
-- 
1.5.6.4


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