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Message-ID: <3F64C627.8060708@colorfullife.com>
Date: Sun, 14 Sep 2003 21:48:55 +0200
From: Manfred Spraul <manfred@colorfullife.com>
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To: linux-kernel@vger.kernel.org
CC: Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] add likely around access_ok for uaccess
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Manfred Spraul wrote:

> Andrew Morton wrote:
>
>> +#define access_ok(type,addr,size) (likely(__range_ok(addr,size) == 0))
>>  
>>
> I don't know. What happens if access_ok is used outside of an if 
> statement?
> One example is
>
> int get_compat_timespec(struct timespec *ts, struct compat_timespec *cts)
> {
>        return (verify_area(VERIFY_READ, cts, sizeof(*cts)) ||
>                        __get_user(ts->tv_sec, &cts->tv_sec) ||
>                        __get_user(ts->tv_nsec, &cts->tv_nsec)) ? 
> -EFAULT : 0;
> }

Duh. Reading is difficult.
The functions with access_ok are get_compat_itimerval and 
put_compat_itimerval.

--
    Manfred