linux-kernel - Re: [PATCH] iommu/vt-d: constify intel_dma

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Message-ID: <0868ed89-f9f2-1983-ea63-2e391142b44b@gmail.com>
Date:   Wed, 28 Jun 2017 15:31:16 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     dwmw2@...radead.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/vt-d: constify intel_dma_ops.

Hi,

Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This file size diff
will show the difference between data and text segment.

Thanks,
~arvind

On Wednesday 28 June 2017 02:23 PM, Joerg Roedel wrote:
> On Tue, Jun 13, 2017 at 03:48:34PM +0530, Arvind Yadav wrote:
>> File size before:
>>     text	   data	    bss	    dec	    hex	filename
>>    32765	    758	   1824	  35347	   8a13	drivers/iommu/intel-iommu.o
>>
>> File size After adding 'const':
>>     text	   data	    bss	    dec	    hex	filename
>>    32925	    598	   1824	  35347	   8a13	drivers/iommu/intel-iommu.o
> What is the point of those commit-messages? They just show that the
> struct moved from data to the text segment. The overall size doesn't
> change much.
>
>
>
> 	Joerg
>