netdev - Re: [Uclinux-dist-devel] [PATCH v3] add the driver for Analog Devices Blackfin on-chip CAN controllers

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Message-ID: <4B20CB82.6060702@grandegger.com>
Date:	Thu, 10 Dec 2009 11:20:50 +0100
From:	Wolfgang Grandegger <wg@...ndegger.com>
To:	Mike Frysinger <vapier.adi@...il.com>
CC:	Barry Song <21cnbao@...il.com>, socketcan-core@...ts.berlios.de,
	uclinux-dist-devel@...ckfin.uclinux.org, davem@...emloft.net,
	"H.J. Oertel" <oe@...t.de>, netdev@...r.kernel.org
Subject: Re: [Uclinux-dist-devel] [PATCH v3] add the driver for Analog Devices
 	Blackfin on-chip CAN controllers

Mike Frysinger wrote:
> On Thu, Dec 10, 2009 at 04:11, Wolfgang Grandegger wrote:
>> Barry Song wrote:
>>> +#include <linux/module.h>
>>> +#include <linux/init.h>
>>> +#include <linux/kernel.h>
>>> +#include <linux/types.h>
>> I think you don't need "types.h" as the code no longer uses "uint*_t".
> 
> linux/types.h declares all types, like u* which this driver still uses

I just remember that "linux/types.h" needs to be added for the uint*_t
types. At a first glance I do not see __u8/u8 being defined in that
header file but I might have missed something.

> 
>> Well, I'm still not a friend of the following inline functions,
>> especially the *one-liners* which are called just *once*. With the usage
>> of structs they seem even more useless.
> 
> seems like it would make more sense to not even use the read/write
> functions either.  just declare the regs as volatile and assign/read
> the struct directly.

Two times no. Don't use volatile and proper accessor functions. See:

http://lxr.linux.no/#linux+v2.6.32/Documentation/volatile-considered-harmful.txt

Wolfgang.

> 
> 

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