Re: [PATCH v9 01/16] tracing: move function tracer options to Kconfig (causing parisc build failures)

[Guenter Roeck]

On Wed, Feb 24, 2021 at 12:38:54PM -0800, Kees Cook wrote:
> On Wed, Feb 24, 2021 at 12:17:23PM -0800, Guenter Roeck wrote:
> > On Fri, Dec 11, 2020 at 10:46:18AM -0800, Sami Tolvanen wrote:
> > > Move function tracer options to Kconfig to make it easier to add
> > > new methods for generating __mcount_loc, and to make the options
> > > available also when building kernel modules.
> > > 
> > > Note that FTRACE_MCOUNT_USE_* options are updated on rebuild and
> > > therefore, work even if the .config was generated in a different
> > > environment.
> > > 
> > > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
> > > Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> > 
> > With this patch in place, parisc:allmodconfig no longer builds.
> > 
> > Error log:
> > Arch parisc is not supported with CONFIG_FTRACE_MCOUNT_RECORD at scripts/recordmcount.pl line 405.
> > make[2]: *** [scripts/mod/empty.o] Error 2
> > 
> > Due to this problem, CONFIG_FTRACE_MCOUNT_RECORD can no longer be
> > enabled in parisc builds. Since that is auto-selected by DYNAMIC_FTRACE,
> > DYNAMIC_FTRACE can no longer be enabled, and with it everything that
> > depends on it.
> 
> Ew. Any idea why this didn't show up while it was in linux-next?
> 

It did, I just wasn't able to bisect it there.

Guenter