linux-kernel - Re: [PATCH 2/2] drivers/misc: Add Aspeed P2A control driver

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, 26 Feb 2019 17:20:11 -0500
From:   "Andrew Jeffery" <andrew@...id.au>
To:     "Patrick Venture" <venture@...gle.com>
Cc:     "Arnd Bergmann" <arnd@...db.de>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Joel Stanley" <joel@....id.au>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org
Subject: Re: [PATCH 2/2] drivers/misc: Add Aspeed P2A control driver



On Wed, 27 Feb 2019, at 08:26, Patrick Venture wrote:
> On Tue, Feb 26, 2019 at 1:42 PM Patrick Venture <venture@...gle.com> wrote:
> >
> > On Sun, Feb 24, 2019 at 5:26 PM Andrew Jeffery <andrew@...id.au> wrote:
> > >
> >
> > >
> > > > +
> > > > +     /* Access to these needs to be locked, held via probe, mapping ioctl,
> > > > +      * and release, remove.
> > > > +      */
> > > > +     struct mutex tracking;
> > > > +     u32 readers;
> > > > +     u32 readerwriters[P2A_REGION_COUNT];
> > >
> > > Might be better to use refcount_t here instead of u32?
> >
> > Ack
> 
> refcount requires atomic, is that something we have with the ast2400, 2500?

Ah, we do on the 2500 (armv6) but not the 2400 (armv5)