linux-kernel - Re: [PATCH 8/8] ftrace/samples: Add multi direct interface test module

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Date:   Tue, 26 Oct 2021 15:29:46 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Jiri Olsa <jolsa@...hat.com>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>
Subject: Re: [PATCH 8/8] ftrace/samples: Add multi direct interface test
 module

On Tue, 26 Oct 2021 12:23:09 -0700
Guenter Roeck <linux@...ck-us.net> wrote:

> On Fri, Oct 08, 2021 at 11:13:36AM +0200, Jiri Olsa wrote:
> > Adding simple module that uses multi direct interface:
> > 
> >   register_ftrace_direct_multi
> >   unregister_ftrace_direct_multi
> > 
> > The init function registers trampoline for 2 functions,
> > and exit function unregisters them.
> > 
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>  
> 
> Building s390:defconfig ... failed
> --------------
> Error log:
> <stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
> {standard input}: Assembler messages:
> {standard input}:11: Error: Unrecognized opcode: `pushq'
> {standard input}:12: Error: Unrecognized opcode: `movq'
> {standard input}:13: Error: Unrecognized opcode: `pushq'
> {standard input}:14: Error: Unrecognized opcode: `movq'
> {standard input}:15: Error: Unrecognized opcode: `call'
> {standard input}:16: Error: Unrecognized opcode: `popq'
> {standard input}:17: Error: Unrecognized opcode: `leave'
> {standard input}:18: Error: Unrecognized opcode: `ret'
> make[3]: *** [scripts/Makefile.build:288: samples/ftrace/ftrace-direct-multi.o] Error 1
> make[2]: *** [scripts/Makefile.build:571: samples/ftrace] Error 2
> make[1]: *** [Makefile:1993: samples] Error 2
> make[1]: *** Waiting for unfinished jobs....
> make: *** [Makefile:226: __sub-make] Error 2
> 
>

  https://lore.kernel.org/all/YXAqZ%2FEszRisunQw@osiris/

-- Steve