linux-kernel - Re: kernel.h: add ARRAY_AND_SIZE() macro to complement ARRAY

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Date:	Sat, 20 Sep 2008 18:38:51 +0200
From:	Christer Weinigel <christer@...nigel.se>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	Alexey Dobriyan <adobriyan@...il.com>,
	Russ Dill <russ.dill@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	Ben Dooks <ben-linux@...ff.org>, linux-kernel@...r.kernel.org
Subject: Re: kernel.h: add ARRAY_AND_SIZE() macro to complement	ARRAY_SIZE().

Cyrill Gorcunov wrote:
> [Christer Weinigel - Sat, Sep 20, 2008 at 04:28:19PM +0200]
> ...
>> In my opinion, making platform_add_devices into a magic macro is  
>> actually worse, since the same construct (array, ARRAY_SIZE(array)) is  
>> used in many places, so one would have to do the same thing over and  
>> over again for every function.  In that case it's better to have to  
>> learn one macro once, and the ALL_CAPITALS should make it obvious that  
>> it is a macro.

> Well, can't agree with you :) It's my _presonal_ opinion.
> You could define it as
> 
> static inline int platform_add_devices_array(struct platform_device **devs)
> {
> 	return platform_add_devices(devs, ARRAY_SIZE(devs));
> }

Won't work.  You would have to use a macro.  The above would turn into:

      platform_add_devices(devs, 1);

or would if the __must_be_array check didn't catch it.

   /Christer
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