linux-kernel - Re: [PATCH] synchronize

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: <E1IiWTY-0000jx-00@gondolin.me.apana.org.au>
Date:	Thu, 18 Oct 2007 22:35:52 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	benh@...nel.crashing.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH] synchronize_irq needs a barrier

Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
> 
> Note that some kind of read barrier or compiler barrier should be needed
> regardless, or we are just not sync'ing with anything at all (we may
> have loaded the value ages ago and thus operate on a totally stale
> value). I prefer a full barrier to also ensure all previous stores are
> pushed out.

We already have a compiler barrier there in the form of cpu_relax.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
-
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/