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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 10 Sep 2007 11:59:29 -0700 (PDT) From: Christoph Lameter <clameter@....com> To: Segher Boessenkool <segher@...nel.crashing.org> cc: Paul Mackerras <paulus@...ba.org>, heiko.carstens@...ibm.com, horms@...ge.net.au, Stefan Richter <stefanr@...6.in-berlin.de>, Satyam Sharma <satyam@...radead.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, David Miller <davem@...emloft.net>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>, ak@...e.de, cfriesen@...tel.com, rpjday@...dspring.com, Netdev <netdev@...r.kernel.org>, jesper.juhl@...il.com, linux-arch@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, zlynx@....org, schwidefsky@...ibm.com, Chris Snook <csnook@...hat.com>, Herbert Xu <herbert@...dor.apana.org.au>, Linus Torvalds <torvalds@...ux-foundation.org>, wensong@...ux-vs.org, wjiang@...ilience.com Subject: Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures On Fri, 17 Aug 2007, Segher Boessenkool wrote: > "volatile" has nothing to do with reordering. atomic_dec() writes > to memory, so it _does_ have "volatile semantics", implicitly, as > long as the compiler cannot optimise the atomic variable away > completely -- any store counts as a side effect. Stores can be reordered. Only x86 has (mostly) implicit write ordering. So no atomic_dec has no volatile semantics and may be reordered on a variety of processors. Writes to memory may not follow code order on several processors. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists