linux-kernel - Re: [PATCH v3 2/5] tracing: Rework synthetic event command parsing

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Date:   Tue, 08 Dec 2020 11:37:02 -0600
From:   Tom Zanussi <zanussi@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     axelrasmussen@...gle.com, mhiramat@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] tracing: Rework synthetic event command parsing

Hi Steve,

On Mon, 2020-12-07 at 19:16 -0500, Steven Rostedt wrote:
> On Mon, 26 Oct 2020 10:06:10 -0500
> Tom Zanussi <zanussi@...nel.org> wrote:
> 
> > Now that command parsing has been delegated to the create functions
> > and we're no longer constrained by argv_split(), we can modify the
> > synthetic event command parser to better match the higher-level
> > structure of the synthetic event commands, which is basically an
> > event
> > name followed by a set of semicolon-separated fields.
> > 
> > Since we're also now passed the raw command, we can also save it
> > directly and can get rid of save_cmdstr().
> > 
> > Signed-off-by: Tom Zanussi <zanussi@...nel.org>
> > ---
> > 
> 
> This patch fails to build with:
> 
>   CC      kernel/trace/trace_events_synth.o
> /work/git/linux-trace.git/kernel/trace/trace_events_synth.c: In
> function ‘create_or_delete_synth_event’:
> /work/git/linux-trace.git/kernel/trace/trace_events_synth.c:1372:8:
> error: implicit declaration of function ‘check_command’ [-
> Werror=implicit-function-declaration]
>  1372 |  ret = check_command(raw_command);
>       |        ^~~~~~~~~~~~~
> cc1: some warnings being treated as errors
> make[3]: *** [/work/git/linux-trace.git/scripts/Makefile.build:283:
> kernel/trace/trace_events_synth.o] Error 1
> make[2]: *** [/work/git/linux-trace.git/scripts/Makefile.build:500:
> kernel/trace] Error 2
> make[1]: *** [/work/git/linux-trace.git/Makefile:1799: kernel] Error
> 2
> make[1]: Leaving directory '/work/git/nobackup/bxtest/trace'
> make: *** [Makefile:185: __sub-make] Error 2
> 

Oops, yeah, a stray check_command() call got left behind in that patch
when refactoring, should be moved to the next patch.

Tom

> -- Steve