From: Steven Rostedt <rostedt@goodmis.org>
To: Joe Perches <joe@perches.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
Petr Mladek <pmladek@suse.com>,
linux-kernel@vger.kernel.org, rafael@kernel.org,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-acpi@vger.kernel.org, devicetree@vger.kernel.org,
Rob Herring <robh@kernel.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Tzvetomir Stoyanov <tstoyanov@vmware.com>,
linux-trace-devel@vger.kernel.org, Jiri Olsa <jolsa@redhat.com>,
Namhyung Kim <namhyung@kernel.org>
Subject: Re: [PATCH v6 01/12] tools lib traceevent: Convert remaining %p[fF] users to %p[sS]
Date: Tue, 10 Sep 2019 15:03:03 -0400 [thread overview]
Message-ID: <20190910150303.5a0d3904@oasis.local.home> (raw)
In-Reply-To: <c458e734f5777561138b87228384808398547762.camel@perches.com>
On Tue, 10 Sep 2019 11:42:06 -0700
Joe Perches <joe@perches.com> wrote:
> On Tue, 2019-09-10 at 14:26 -0400, Steven Rostedt wrote:
> > On Tue, 10 Sep 2019 10:18:44 -0700
> > Joe Perches <joe@perches.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/
Thanks for the link.
>
> 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?
Not really. This is just a library that parses the trace event formats,
there's not kernel versions passed in, but we do use variations in
formats and such to determine what is supported.
>
> If so, it might be reasonable to change the tooling
> there instead.
>
Actually, I think we could just look to see if "%pfw" is used and fall
to that, otherwise consider it an older kernel and do it the original
way.
-- Steve
next prev parent reply other threads:[~2019-09-10 19:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-10 8:46 [PATCH v6 00/12] Device property improvements, add %pfw format specifier Sakari Ailus
2019-09-10 8:46 ` [PATCH v6 01/12] tools lib traceevent: Convert remaining %p[fF] users to %p[sS] Sakari Ailus
2019-09-10 9:22 ` Andy Shevchenko
2019-09-10 11:18 ` Steven Rostedt
2019-09-10 17:18 ` Joe Perches
2019-09-10 18:26 ` Steven Rostedt
2019-09-10 18:42 ` Joe Perches
2019-09-10 19:03 ` Steven Rostedt [this message]
2019-09-10 19:44 ` Joe Perches
2019-09-16 11:41 ` Sakari Ailus
2019-09-16 14:37 ` Steven Rostedt
2019-09-18 13:08 ` Sakari Ailus
2019-09-10 8:46 ` [PATCH v6 02/12] software node: Get reference to parent swnode in get_parent op Sakari Ailus
2019-09-10 8:46 ` [PATCH v6 03/12] software node: Make argument to to_software_node const Sakari Ailus
2019-09-10 8:46 ` [PATCH v6 04/12] device property: Move fwnode_get_parent() up Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 05/12] device property: Add functions for accessing node's parents Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 06/12] device property: Add fwnode_get_name for returning the name of a node Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 07/12] device property: Add a function to obtain a node's prefix Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 08/12] lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %ps Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 09/12] lib/vsprintf: Make use of fwnode API to obtain node names and separators Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 10/12] lib/vsprintf: OF nodes are first and foremost, struct device_nodes Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 11/12] lib/vsprintf: Add %pfw conversion specifier for printing fwnode names Sakari Ailus
2019-09-10 10:21 ` Joe Perches
2019-09-18 13:11 ` Sakari Ailus
2019-09-10 8:47 ` [PATCH v6 12/12] lib/test_printf: Add tests for %pfw printk modifier Sakari Ailus
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190910150303.5a0d3904@oasis.local.home \
--to=rostedt@goodmis.org \
--cc=acme@redhat.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=devicetree@vger.kernel.org \
--cc=heikki.krogerus@linux.intel.com \
--cc=joe@perches.com \
--cc=jolsa@redhat.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-devel@vger.kernel.org \
--cc=namhyung@kernel.org \
--cc=pmladek@suse.com \
--cc=rafael@kernel.org \
--cc=robh@kernel.org \
--cc=sakari.ailus@linux.intel.com \
--cc=tstoyanov@vmware.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.