linux-kernel - Re: [PATCH] NFC: nfcmrvl: Include unaligned.h instead of access

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Date:   Wed, 26 Oct 2016 11:03:47 +0200
From:   Tobias Klauser <tklauser@...tanz.ch>
To:     Lauro Ramos Venancio <lauro.venancio@...nbossa.org>,
        Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>
Cc:     Samuel Ortiz <sameo@...ux.intel.com>,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vincent Cuissard <cuissard@...vell.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH] NFC: nfcmrvl: Include unaligned.h instead of access_ok.h

On 2016-10-26 at 11:00:12 +0200, Tobias Klauser <tklauser@...tanz.ch> wrote:
> Including linux/unaligned/access_ok.h causes the allmodconfig build on
> ia64 (and maybe others) to fail with the following warnings:
> 
> include/linux/unaligned/access_ok.h:7:19: error: redefinition of 'get_unaligned_le16'
> include/linux/unaligned/access_ok.h:12:19: error: redefinition of 'get_unaligned_le32'
> include/linux/unaligned/access_ok.h:17:19: error: redefinition of 'get_unaligned_le64'
> include/linux/unaligned/access_ok.h:22:19: error: redefinition of 'get_unaligned_be16'
> include/linux/unaligned/access_ok.h:27:19: error: redefinition of 'get_unaligned_be32'
> include/linux/unaligned/access_ok.h:32:19: error: redefinition of 'get_unaligned_be64'
> include/linux/unaligned/access_ok.h:37:20: error: redefinition of 'put_unaligned_le16'
> include/linux/unaligned/access_ok.h:42:20: error: redefinition of 'put_unaligned_le32'
> include/linux/unaligned/access_ok.h:42:20: error: redefinition of 'put_unaligned_le64'
> include/linux/unaligned/access_ok.h:42:20: error: redefinition of 'put_unaligned_be16'
> include/linux/unaligned/access_ok.h:42:20: error: redefinition of 'put_unaligned_be32'
> include/linux/unaligned/access_ok.h:42:20: error: redefinition of 'put_unaligned_be64'
> 
> Fix these by including asm/unaligned.h instead and leave it up to the
> architecture to decide how to implement unaligned accesses.
> 
> Fixes: 3194c6870158 ("NFC: nfcmrvl: add firmware download support")
> Reported-by: kbuild test robot <fengguang.wu@...el.com>
> Link: https://lkml.org/lkml/2016/10/22/247
> Cc: Vincent Cuissard <cuissard@...vell.com>
> Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>

There are two other instances of the same issue in the NFC subsystem,
namely in drivers/nfc/nxp-nci/firmware.c and drivers/nfc/nxp-nci/i2c.c

Guenter Roeck already sent a patch for these on 2015-08-01. It would be
nice if it could be applied as well.

[1] https://patchwork.kernel.org/patch/6922341/

Thanks