linux-kernel - Re: [PATCH 0/2] objtool: a couple of minor fixes

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Message-ID: <3931713.dYrUncsTll@wuerfel>
Date:   Wed, 26 Oct 2016 11:16:30 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] objtool: a couple of minor fixes

On Wednesday, October 26, 2016 9:58:29 AM CEST Arnd Bergmann wrote:
> On Thursday, October 13, 2016 4:22:51 PM CEST Josh Poimboeuf wrote:
> > Fix a couple of issues:
> > 
> > - fix a false positive warning related to switch statement jump tables
> > - get rid of useless "unreachable instruction" warnings for gcov kernels
> > 
> > Josh Poimboeuf (2):
> >   objtool: improve rare switch jump table pattern detection
> >   objtool: skip all "unreachable instruction" warnings for gcov kernels
> > 
> >  tools/objtool/builtin-check.c | 68 ++++++++++++++++++++++---------------------
> >  1 file changed, 35 insertions(+), 33 deletions(-)
> 
> I got another warning today with linux-next, but have not looked into it:
> 
> drivers/infiniband/sw/rxe/rxe_comp.o: warning: objtool: rxe_completer()+0x315: sibling call from callable instruction with changed frame pointer
> 
> .config and object file attached.


And another one, let me know if you want detailed information about
this one too, I suspect they are related.

drivers/media/usb/ttusb-dec/ttusb_dec.o: warning: objtool: ttusb_dec_process_urb_frame_list()+0x112: sibling call from callable instruction with changed frame pointer

	Arnd