linux-kernel - RE: [PATCH 0/24] make atomic_read() behave consistently across all architectures

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:	Fri, 17 Aug 2007 10:06:20 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	David Schwartz <davids@...master.com>
cc:	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 0/24] make atomic_read() behave consistently across all
 architectures

[ Your mailer drops Cc: lists, munges headers,
  does all sorts of badness. Please fix that. ]


On Thu, 16 Aug 2007, David Schwartz wrote:

> 
> > There is a quite convincing argument that such an access _is_ an
> > access to a volatile object; see GCC PR21568 comment #9.  This
> > probably isn't the last word on the matter though...
> 
> I find this argument completely convincing and retract the contrary argument
> that I've made many times in this forum and others. You learn something new
> every day.
> 
> Just in case it wasn't clear:
> int i;
> *(volatile int *)&i=2;
> 
> In this case, there *is* an access to a volatile object. This is the end
> result of the the standard's definition of what it means to apply the
> 'volatile int *' cast to '&i' and then apply the '*' operator to the result
> and use it as an lvalue.

True, see my last mail in this sub-thread that explains precisely this :-)


Satyam
-
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/