linux-kernel - Re: [PATCH] arm64: errata: Check for --fix-cortex-a53-843419 and --fix-cortex-a53

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Message-ID: <20161102210331.GJ22791@arm.com>
Date:   Wed, 2 Nov 2016 21:03:32 +0000
From:   Will Deacon <will.deacon@....com>
To:     Markus Mayer <code@...yer.net>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        ARM Kernel Mailing List 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Markus Mayer <mmayer@...adcom.com>
Subject: Re: [PATCH] arm64: errata: Check for --fix-cortex-a53-843419 and
 --fix-cortex-a53

On Mon, Oct 31, 2016 at 12:44:14PM -0700, Markus Mayer wrote:
> From: Markus Mayer <mmayer@...adcom.com>
> 
> The new errata check leads to a warning with some older versions of the
> linker that do know how to work around the errata, but still use the
> original name of the command line option: --fix-cortex-a53. The commit
> in question that changed the name of the option can be found at [1].
> It looks like only "gold" is affected by this rename. Traditional "ld"
> isn't. (There, the argument was always called --fix-cortex-a53-843419.)
> 
> To allow older versions of gold to properly handle the erratum if they
> can, check whether ld supports the old name of this option in addition
> to checking the new one.
> 
> [1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=7a2a1c793578a8468604e661dda025ecb8d0bd20;hp=cfbf0e3c5b637d66b2b1aeadecae9c187b825b2f
> 
> Signed-off-by: Markus Mayer <mmayer@...adcom.com>

If newer versions of gold accept the correct option name, why do we care?

Will