linux-kernel - Re: Tomoyo compile failure on alpha: sys

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Message-ID: <20100924075116.GA2303@infradead.org>
Date:	Fri, 24 Sep 2010 03:51:17 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-alpha@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Kentaro Takeda <takedakn@...data.co.jp>
Subject: Re: Tomoyo compile failure on alpha: sys_get[p]pid undefined

On Fri, Sep 24, 2010 at 09:10:37AM +0300, Meelis Roos wrote:
> 2.6.36-rc5+git as of yesterday:
> 
>   LD      .tmp_vmlinux1
> security/built-in.o: In function `tomoyo_supervisor':(.text+0xea98): undefined reference to `sys_getpid'
> security/built-in.o: In function `tomoyo_supervisor':(.text+0xeab0): undefined reference to `sys_getpid'
> security/built-in.o: In function `tomoyo_supervisor':(.text+0xeac0): undefined reference to `sys_getppid'
> security/built-in.o: In function `tomoyo_supervisor':(.text+0xeac4): undefined reference to `sys_getppid'
> 
> Seems alpha has different mechanisms for using these syscalls from 
> inside the kernel?

The real problem is that kernel code should never call system calls.
The correct fix is to get rid of this abuse.

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