linux-kernel - Re: [PATCH] rcu: avoid checking for constant

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: <1326384875.2950.25.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Thu, 12 Jan 2012 17:14:35 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>, laijs@...fujitsu.com,
	manfred@...orfullife.com, dhowells@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu: avoid checking for constant

Le jeudi 12 janvier 2012 à 17:08 +0100, Jan Engelhardt a écrit :

> Maybe, maybe naah. The kernel relying on gcc's -O2 mode to do constant 
> value analysis through and into inline functions does not sound too 
> great. The compiler could change on the next moonphase. In fact, one 
> can't use clang -O2 because of this. With my patch, one can again use 
> clang -O2 [with respect to kfree_rcu].

Unless whole kernel can be compiled with -O0, its really some noise.



--
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/