linux-kernel - Re: [PATCH] arch: metag: lib: add "umoddi3.S" file for _

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Message-ID: <52B2E3DB.7010008@imgtec.com>
Date:	Thu, 19 Dec 2013 12:17:31 +0000
From:	James Hogan <james.hogan@...tec.com>
To:	Chen Gang <gang.chen.5i5j@...il.com>
CC:	<rostedt@...dmis.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	<linux-metag@...r.kernel.org>
Subject: Re: [PATCH] arch: metag: lib: add "umoddi3.S" file for __umoddi3()

On 19/12/13 12:05, Chen Gang wrote:
> Use objdump to get "umoddi3.S" for __umoddi3(), the original binary
> file is "gcc-4.2.4-final/gcc/libgcc/umoddi3.o" which is generated by
> "gcc-4.2.4/gcc/libgcc2.c".
> 
> The relate error with allmodconfig:
> 
>     MODPOST 2909 modules
>   ERROR: "__umoddi3" [drivers/target/target_core_mod.ko] undefined!

_umoddi3 is a 64bit division, which should be using the proper division
functions provided by the kernel in <linux/math64.h>.

It needs fixing wherever it comes from in drivers/target/target_core_mod.ko.

Cheers
James

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