From: Keith Owens <kaos@ocs.com.au>
To: Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] 2.5.8 sort kernel tables
Date: Fri, 19 Apr 2002 09:17:16 +1000 [thread overview]
Message-ID: <6277.1019171836@ocs3.intra.ocs.com.au> (raw)
In-Reply-To: Your message of "18 Apr 2002 19:51:43 +0200." <p738z7kao9c.fsf@oldwotan.suse.de>
On 18 Apr 2002 19:51:43 +0200,
Andi Kleen <ak@suse.de> wrote:
>Paul Mackerras <paulus@samba.org> writes:
>>
>> BTW, do you have any valid examples of use of copy_to/from_user or
>> get/put_user in an init section?
>
>i386 uses the exception tables to check at startup for the old i386 bug of
>pages not being write protected when writing from supervisor mode. That
>function is __init.
It used to be, somebody realised that it did not work and took it out
of __init. With sorted tables it can be moved back.
/*
* This function cannot be __init, since exceptions don't work in that
* section.
*/
static int do_test_wp_bit(unsigned long vaddr);
That fixes the symptom, not the cause. It is better to sort the tables
at boot time than to find each bit of code that might break the tables
and change the code.
next prev parent reply other threads:[~2002-04-18 23:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1589.1019123186@ocs3.intra.ocs.com.au.suse.lists.linux.kernel>
[not found] ` <15550.50131.489249.256007@nanango.paulus.ozlabs.org.suse.lists.linux.kernel>
2002-04-18 17:51 ` Andi Kleen
2002-04-18 23:17 ` Keith Owens [this message]
2002-04-19 11:38 Randal, Phil
2002-04-20 5:19 ` Keith Owens
2002-04-20 8:50 ` Alan Cox
2002-04-20 9:40 ` Keith Owens
-- strict thread matches above, loose matches on Subject: below --
2002-04-18 9:46 Keith Owens
2002-04-18 10:21 ` Matthias Andree
2002-04-18 10:32 ` Keith Owens
2002-04-18 10:52 ` Alan Cox
2002-04-18 13:02 ` Paul Mackerras
2002-04-18 15:38 ` Keith Owens
2002-04-18 15:52 ` Russell King
2002-04-18 16:09 ` Keith Owens
2002-04-18 13:59 ` William Lee Irwin III
2002-04-18 18:16 ` Kai Henningsen
2002-04-18 18:24 ` William Lee Irwin III
2002-04-19 11:46 ` David Weinehall
2002-04-18 20:20 ` Oliver Xymoron
2002-04-19 4:59 ` Matt
2002-04-19 13:45 ` Jamie Lokier
2002-04-19 13:46 ` Jamie Lokier
2002-04-19 14:25 ` Oliver Xymoron
2002-04-19 15:16 ` Tobias Wollgam
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