linux-kernel - Re: [PATCH] drivers/base: use READ_ONCE instead of deprecated ACCESS

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, 29 Nov 2016 20:24:12 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH] drivers/base: use READ_ONCE instead of deprecated
 ACCESS_ONCE

On Sat, Nov 19, 2016 at 11:52:48AM -0800, Davidlohr Bueso wrote:
> With the new standardized functions, we can replace all ACCESS_ONCE()
> calls across relevant drivers/base/.
> 
> ACCESS_ONCE() does not work reliably on non-scalar types. For example
> gcc 4.6 and 4.7 might remove the volatile tag for such accesses during
> the SRA (scalar replacement of aggregates) step:
> 
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145
> 
> Update the new calls regardless of if it is a scalar type, this is
> cleaner than having three alternatives.
> 
> Signed-off-by: Davidlohr Bueso <dbueso@...e.de>

>From does not match signed-off-by, so I can't take this, sorry.

greg k-h