linux-kernel - Re: how to fix nand driver build breakage

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Message-Id: <1232365578.5764.4.camel@odie.local>
Date:	Mon, 19 Jan 2009 12:46:18 +0100
From:	Simon Holm Thøgersen <odie@...aau.dk>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	"Gao, Yunpeng" <yunpeng.gao@...el.com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: how to fix nand driver build breakage

man, 19 01 2009 kl. 13:25 +0900, skrev KOSAKI Motohiro:
> > Hi all,
> > 
> > I have to use 64bit variable in my 2.6.27 kernel NAND driver as below:
> > ---------------------------------------------------------------------------
> > u64 NAND_capacity;
> > unsigned int block_num, block_size;
> > ...
> > block_num = NAND_capacity / block_size;
> > ---------------------------------------------------------------------------
> > but it failed when compiling and reports 'undefined reference to `__udivdi3'.
> > 
> > Does any idea about this? I need to include some special head file or change something in Kconfig?
> > 
> > BTW, the environment is Fedora Core 9, gcc 4.3.0. 
> 
> Couldn't you use do_div()?

Perhaps rather div_u64, but otherwise he should be able to yes.


Simon Holm Thøgersen

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