linux-kernel - Re: [PATCH 1 of 4] mm: add a ptep_modify

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <485BFFC4.3070902@goop.org>
Date:	Fri, 20 Jun 2008 12:06:44 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	benh@...nel.crashing.org,
	xen-devel <xen-devel@...ts.xensource.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	kvm-devel <kvm-devel@...ts.sourceforge.net>, x86@...nel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Virtualization Mailing List <virtualization@...ts.osdl.org>,
	Hugh Dickins <hugh@...itas.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 1 of 4] mm: add a ptep_modify_prot transaction	abstraction

Ingo Molnar wrote:
> * Ingo Molnar <mingo@...e.hu> wrote:
>
>   
>> * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>>
>>     
>>> On Thu, 19 Jun 2008, Ingo Molnar wrote:
>>>       
>>>> Below is the commit, it needed a small amount of massaging to apply the 
>>>> void * -> unsigned long * change in the x86/bitops topic.
>>>>         
>>> Well, that's your bug right there.
>>>
>>> The macros very much depended on the pointers being "void *", due to 
>>> the pointer arithmetic (which is a gcc extension that we use 
>>> extensively - "void *" arithmetic works as if it was a byte 
>>> pointer).
>>>       
>> duh, yeah - of course. Will retry with that fixed :)
>>     
>
> yep, the patch below got it all going and it passed 5 hours of testing 
> already. Thanks,
>   

Blows up on "gcc version 3.4.4 20050314 (prerelease) (Debian 3.4.3-13)":

  CC      init/main.o
include2/asm/bitops.h: In function `start_kernel':
include2/asm/bitops.h:59: warning: asm operand 1 probably doesn't match constraints
include2/asm/bitops.h:59: warning: asm operand 1 probably doesn't match constraints
include2/asm/bitops.h:59: warning: asm operand 1 probably doesn't match constraints
include2/asm/bitops.h:59: error: impossible constraint in `asm'
include2/asm/bitops.h:59: error: impossible constraint in `asm'
include2/asm/bitops.h:59: error: impossible constraint in `asm'

	J


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/