linux-kernel - Re: [PATCH] [RFC] ARM: keystone: possibly fix big-endian kernels

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Message-ID: <20160223145318.GK19428@n2100.arm.linux.org.uk>
Date:	Tue, 23 Feb 2016 14:53:18 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Santosh Shilimkar <ssantosh@...nel.org>,
	Nishanth Menon <nm@...com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RFC] ARM: keystone: possibly fix big-endian kernels

On Tue, Feb 23, 2016 at 03:43:21PM +0100, Arnd Bergmann wrote:
> While discussing a regressing in the netcp driver, I wondered
> whether Keystone can work with a big-endian kernel, and noticed
> that we don't switch endianess when we enter the kernel on the
> secondary CPU, or when we call into smc.

NAK.  Sorry Arnd, you're worringly wrong on this.

secondary_startup will do the setend if necessary, there's no need
to do this kind of junk in each and every platform.  It's been this
way since:

commit 97bcb0fea590d3d704f985bec08f342d28992634
Author: Ben Dooks <ben.dooks@...ethink.co.uk>
Date:   Fri Feb 1 09:40:42 2013 +0000

So, I hope you've not been telling platform folk to do this.  Please
audit the arm-soc code to make sure, thanks.

-- 
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