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

Joe Perches
2019-09-10T17:18:50Z

On Tue, 2019-09-10 at 07:18 -0400, Steven Rostedt wrote:
> On Tue, 10 Sep 2019 11:46:56 +0300
> Sakari Ailus <sakari.ailus@linux.intel.com> wrote:
>
> > There are no in-kernel %p[fF] users left. Convert the traceevent tool,
> > too, to align with the kernel.
[]
> > diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
[]
> > @@ -4335,8 +4335,6 @@ static struct tep_print_arg *make_bprint_args(char *fmt, void *data, int size, s
> > switch (*ptr) {
> > case 's':
> > case 'S':
> > - case 'f':
> > - case 'F':
>
> This file is used to parse output from older kernels, so remove this hunk.
>
> 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'