linux-kernel - Re: [RFC][PATCH] powerpc: Use the #address-cells information to parsememory/reg

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Date:	Mon, 06 Jun 2011 16:59:26 +0530
From:	Suzuki Poulose <suzuki@...ibm.com>
To:	David Laight <David.Laight@...LAB.COM>
CC:	Simon Horman <horms@...ge.net.au>,
	linux ppc dev <linuxppc-dev@...ts.ozlabs.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	kexec@...ts.infradead.org, lkml <linux-kernel@...r.kernel.org>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [RFC][PATCH] powerpc: Use the #address-cells information to parsememory/reg

On 06/06/11 14:30, David Laight wrote:
>>> Changed the add_usable_mem_property() to accept FILE* fp instead of
> int fd,
>>> as most of the other users of read_memory_region_limits() deals with
> FILE*.
>>>
>>> Signed-off-by: Suzuki K. Poulose<suzuki@...ibm.com>
>>
>> Could you please let me know your thoughts/comments about this patch ?
>
> Is the change to use 'FILE *' actually progress?
> I'd have thought that the randomly aligned read/lseek system calls
> that this allows to happen are not desirable for anything that
> isn't a true file.
I will revert the other users back to 'fd'
>
> I'd also suggest that the sizeof's should be applied to the
> actual type of the variable being read/written, not arbitrarily
> 'long' or 'int', and this probably ought to be some fixed size type.
I have used 'unsigned long'(for word sized values) or 'unsigned long long'
(for double words) just to make sure we get the right values. Is this OK ?

Thanks
Suzuki
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