linux-kernel - Re: [PATCH v6 01/12] tools lib traceevent: Convert remaining %p[fF] users to %p[sS]

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c458e734f5777561138b87228384808398547762.camel@perches.com>
Date:   Tue, 10 Sep 2019 11:42:06 -0700
From:   Joe Perches <joe@...ches.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Petr Mladek <pmladek@...e.com>, linux-kernel@...r.kernel.org,
        rafael@...nel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-acpi@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Tzvetomir Stoyanov <tstoyanov@...are.com>,
        linux-trace-devel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v6 01/12] tools lib traceevent: Convert remaining %p[fF]
 users to %p[sS]

On Tue, 2019-09-10 at 14:26 -0400, Steven Rostedt wrote:
> On Tue, 10 Sep 2019 10:18:44 -0700
> Joe Perches <joe@...ches.com> wrote:
> 
> > > It's not just for the lastest kernel. We must maintain backward
> > > compatibility here too. If there use to be a usage of this, then we
> > > must keep it until the kernels are no longer used (perhaps 7 years?)  
> > 
> > That argues for not using "%pfw" at all for some number of years.
> > 
> > Perhaps the '%pfw' should be '%pnfw' for 'name' and 'fwnode'
>
>   -ENOCOMPREHENSION

Perhaps you were not copied on the whole series.

https://lore.kernel.org/lkml/20190910084707.18380-1-sakari.ailus@linux.intel.com/

As I understand it, Sakair Ailus is proposing to
obsolete the current vsprintf "%p[Ff]" extension
and replace the usage with a new "%pfw" extension
which would emit the name of a pointer to "struct fwnode {}".

https://lore.kernel.org/lkml/20190910084707.18380-10-sakari.ailus@linux.intel.com/

If reusing "%pf<foo>" is a problem, then instead
it might be reasonable to have a new "%pn<foo>" for
that use instead.

btw:

Is there kernel version information available in
trace output files?

If so, it might be reasonable to change the tooling
there instead.