linux-kernel - Re: [tip:core/locking] locking, x86: Slightly shorten __ticket_spin

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: <4B167B77.8030502@redhat.com>
Date:	Wed, 02 Dec 2009 16:36:39 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Jan Beulich <JBeulich@...ell.com>
CC:	a.p.zijlstra@...llo.nl, Ingo Molnar <mingo@...e.hu>,
	tglx@...utronix.de, torvalds@...ux-foundation.org,
	mingo@...hat.com, npiggin@...e.de, linux-kernel@...r.kernel.org,
	linux-tip-commits@...r.kernel.org, hpa@...or.com
Subject: Re: [tip:core/locking] locking, x86: Slightly shorten	 __ticket_spin_trylock()

On 12/02/2009 04:25 PM, Jan Beulich wrote:
>>>> Avi Kivity<avi@...hat.com>  02.12.09 15:12>>>
>>>>          
>> Wouldn't 'u8 ret', as an additional argument be sufficient? gcc still
>> ought to be able to use the same register for new and ret if we remove
>> the early clobber.
>>      
> We can't (validly) remove the early-clobber, otherwise the compiler
> would be permitted to use a register also used for addressing the lock
> structure for "new".
>    

I meant for 'ret'.

-- 
error compiling committee.c: too many arguments to function

--
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/