From mboxrd@z Thu Jan  1 00:00:00 1970
From: arnd@arndb.de (Arnd Bergmann)
Date: Wed, 11 Nov 2015 09:42 +0100
Subject: [kbuild-all] [PATCH V3 4/4] dma: add Qualcomm Technologies HIDMA
 channel driver
In-Reply-To: <20151111022103.GA29459@wfg-t540p.sh.intel.com>
References: <201511090323.GmbQltpW%fengguang.wu@intel.com>
 <563FEC48.2010404@codeaurora.org>
 <20151111022103.GA29459@wfg-t540p.sh.intel.com>
Message-ID: <4119660.BobUIRMK6T@wuerfel>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wednesday 11 November 2015 10:21:03 Fengguang Wu wrote:
> Hi Sinan,
> 
> Sorry please ignore this warning -- it's actually a problem specific
> to the mn10300 arch. I'll disable such warning in mn10300 in future.

I just tried to find what happened here. mn10300 appears to define
the type based on the gcc version:

#if __GNUC__ == 4
typedef unsigned int    __kernel_size_t;
typedef signed int      __kernel_ssize_t;
#else
typedef unsigned long   __kernel_size_t;
typedef signed long     __kernel_ssize_t;
#endif

while gcc defines it based on whether you are using a Linux targetted
gcc or a bare-metal one:

gcc/config/mn10300/linux.h:#undef SIZE_TYPE
gcc/config/mn10300/mn10300.h:#undef  SIZE_TYPE
gcc/config/mn10300/mn10300.h:#define SIZE_TYPE "unsigned int"

I can think of two reasons why it went wrong here:

a) You are using gcc-5.x, and the check in the kernel should be ">="
   rather than "==". We should probably fix that regardless

b) You are using a bare-metal gcc rather than a Linux version.

I couldn't find an mn10300 gcc on kernel.org, which one do you use?

	Arnd