linux-kernel - Re: [PATCH v2] mtd: mtdram: fix build error

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Date:	Wed, 30 Sep 2015 08:51:07 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	lkp@...el.com
Subject: Re: [PATCH v2] mtd: mtdram: fix build error

On Wed, Sep 30, 2015 at 06:59:26PM +0530, Sudip Mukherjee wrote:
> i386 allmodconfig fails with:
> ERROR: "__umoddi3" [drivers/mtd/devices/mtdram.ko] undefined!
> ERROR: "__moddi3" [drivers/mtd/devices/mtdram.ko] undefined!
> 
> arm allmodconfig fails with:
> ERROR: "__aeabi_uldivmod" [drivers/mtd/devices/mtdram.ko] undefined!
> ERROR: "__aeabi_ldivmod" [drivers/mtd/devices/mtdram.ko] undefined!
> 
> mips allmodconfig fails with:
> ERROR: "__umoddi3" [drivers/mtd/devices/mtdram.ko] undefined!
> ERROR: "__moddi3" [drivers/mtd/devices/mtdram.ko] undefined!
> 
> The modulus operation is not being supported by these compilers. Use
> do_div() instead which returns the remainder.
> 
> Fixes: 7827e3acad2d ("mtd: mtdram: check offs and len in mtdram->erase")
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
> 
> v1 showed build warning with cris and xtensa. I have checked v2 with
> arm, cris and xtensa.

I already reverted the bad patch, so this doesn't apply any more...

If you want to send a squashed patch that redoes this properly, I can
take it.

Brian
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