linux-kernel - Re: [PATCH v2 3/3] openrisc: Fix issue with get

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Message-ID: <20200905135714.74bsr5h423k7guw4@ltop.local>
Date:   Sat, 5 Sep 2020 15:57:14 +0200
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     Stafford Horne <shorne@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        openrisc@...ts.librecores.org
Subject: Re: [PATCH v2 3/3] openrisc: Fix issue with get_user for 64-bit
 values

On Sat, Sep 05, 2020 at 10:19:35PM +0900, Stafford Horne wrote:

Hi,

The change for 64-bit get_user() looks good to me.
But I wonder, given that openrisc is big-endian, what will happen
you have the opposite situation:
	u32 *ptr;
	u64 val;
	...
	get_user(val, ptr);

Won't you end with the value in the most significant part of
the register pair?

-- Luc