linux-kernel - Re: [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations

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]

Date:   Wed, 22 Feb 2017 12:19:40 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Stafford Horne <shorne@...il.com>
Cc:     Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        linux@...ck-us.net, openrisc@...ts.librecores.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 08/25] openrisc: add cmpxchg and xchg implementations

On Wed, Feb 22, 2017 at 04:11:37AM +0900, Stafford Horne wrote:
> +	__asm__ __volatile__(
> +		"1:	l.lwa %0, 0(%1)		\n"
> +		"	l.sfeq %0, %2		\n"
> +		"	l.bnf 1f		\n"
> +		"	 l.nop			\n"
> +		"	l.swa 0(%1), %3		\n"
> +		"	l.bnf 1b		\n"
> +		"1:	 l.nop			\n"
> +		: "=&r"(old)
> +		: "r"(ptr), "r"(old), "r"(new)
> +		: "cc", "memory");

I just noticed this, but having both labels have the same name is
somewhat confusing.