linux-kernel - Re: [PATCHv3 5/6] arm64: Use __pa

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Message-ID: <20161123094847.GC24624@leverpostej>
Date:   Wed, 23 Nov 2016 09:48:47 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Laura Abbott <labbott@...hat.com>
Cc:     lorenzo.pieralisi@....com,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Will Deacon <will.deacon@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv3 5/6] arm64: Use __pa_symbol for kernel symbols

On Mon, Nov 21, 2016 at 09:40:06AM -0800, Laura Abbott wrote:
> On 11/18/2016 06:35 AM, Mark Rutland wrote:
> > On Thu, Nov 17, 2016 at 05:16:55PM -0800, Laura Abbott wrote:
> >>  	/* Grab the vDSO code pages. */
> >>  	for (i = 0; i < vdso_pages; i++)
> >> -		vdso_pagelist[i + 1] = pfn_to_page(PHYS_PFN(__pa(&vdso_start)) + i);
> >> +		vdso_pagelist[i + 1] = pfn_to_page(PHYS_PFN(__pa_symbol(&vdso_start)) + i);
> > 
> > Nit: phys_to_page() again.
> 
> I think it makes sense to keep this one as is. It's offsetting
> by pfn number and trying force phys_to_page would make it more
> difficult to read.

My bad; I failed to spot the + i.

That sounds good to me; sorry for the noise there.

Thanks,
Mark.