linux-kernel - Re: [RFC PATCH 0/2] init: make sure syscall arguments are marked _

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Message-Id: <20120420174319.6cea0e81.akpm@linux-foundation.org>
Date:	Fri, 20 Apr 2012 17:43:19 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/2] init: make sure syscall arguments are marked
 __user where needed

On Fri, 20 Apr 2012 19:05:46 -0500 H Hartley Sweeten <hartleys@...ionengravers.com> wrote:

> > Can we just make "make C=1" skip that file or something?
> 
> What about putting something like this at the top of the files:
> 
> 
> /*
>  * Many of the syscalls used in this file expect some of the arguments
>  * to be __user pointers not __kernel pointers.  To limit the sparse
>  * noise, turn off sparse checking for this file.
>  */
> #ifdef __CHECKER__
> #undef __CHECKER__
> #warning "Sparse checking disabled for this file"
> #endif
> 
> 
> Maybe without the warning if it doesn't seem necessary.
> 
> This keeps <linux/compiler.h> from defining the __attribute__* checks.

That looks nice and explicit.
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