linux-kernel - Re: [PATCH] iommu/arm-smmu: add a shortcut when the @dev

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Date:	Wed, 20 Jan 2016 13:02:25 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Huang Shijie <shijie.huang@....com>
Cc:	will.deacon@....com, linux-arm-kernel@...ts.infradead.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	nd@....com
Subject: Re: [PATCH] iommu/arm-smmu: add a shortcut when the @dev_node is NULL

On Tue, Jan 12, 2016 at 10:15:05AM +0800, Huang Shijie wrote:
> This patch adds a shortcut for the code when the @device_node is NULL.
> In my juno-r1 board, the boot time can be faster by 0.004014s.

How have you made sure this number is reliable and not just noise in the
boot process?


	Joerg