linux-kernel - Re: [RFC PATCH 28/33] Add Xen grant table support

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:	Tue, 25 Jul 2006 21:06:51 +0200
From:	Segher Boessenkool <segher@...nel.crashing.org>
To:	Hollis Blanchard <hollisb@...ibm.com>
Cc:	Chris Wright <chrisw@...s-sol.org>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>, virtualization@...ts.osdl.org,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	xen-devel@...ts.xensource.com, Ian Pratt <ian.pratt@...source.com>,
	xen-ppc-devel <xen-ppc-devel@...ts.xensource.com>
Subject: Re: [RFC PATCH 28/33] Add Xen grant table support

> I object to these uses of (synch_)cmpxchg on a uint16_t in common  
> code.
> Many architectures, including PowerPC, do not support 2-byte atomic
> operations, but this code is common to all Xen architectures.

RMW operations you mean, I suppose.  On PowerPC, all (naturally
aligned) halfword operations are atomic; there do not exist any
RMW operations; but word and doubleword atomic RMW operations
can be emulated.

Boils down to the same thing of course, but it isn't the same ;-)


Segher

-
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/