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Date:   Thu, 29 Aug 2019 12:01:45 +0200
From:   Michal =?UTF-8?B?U3VjaMOhbmVr?= <msuchanek@suse.de>
To:     Christoph Hellwig <hch@infradead.org>
Cc:     Michael Neuling <mikey@neuling.org>, Arnd Bergmann <arnd@arndb.de>,
        Nicolai Stange <nstange@suse.de>,
        David Hildenbrand <david@redhat.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        linux-kernel@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>,
        David Howells <dhowells@redhat.com>,
        Hari Bathini <hbathini@linux.ibm.com>,
        Paul Mackerras <paulus@samba.org>,
        Joel Stanley <joel@jms.id.au>,
        Christian Brauner <christian@brauner.io>,
        Firoz Khan <firoz.khan@linaro.org>,
        Breno Leitao <leitao@debian.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linuxppc-dev@lists.ozlabs.org,
        Allison Randal <allison@lohutok.net>,
        "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [PATCH v3 3/4] powerpc/64: make buildable without CONFIG_COMPAT
Message-ID: <20190829120145.5201174f@naga>
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On Wed, 28 Aug 2019 23:46:24 -0700
Christoph Hellwig <hch@infradead.org> wrote:

> On Wed, Aug 28, 2019 at 06:43:50PM +0200, Michal Suchanek wrote:
> > +ifdef CONFIG_COMPAT
> > +obj-y				+= sys_ppc32.o ptrace32.o signal_32.o
> > +endif  
> 
> This should be:
> 
> obj-$(CONFIG_COMPAT)		+= sys_ppc32.o ptrace32.o signal_32.o

Yes, looks better.
> 
> >  /* This value is used to mark exception frames on the stack. */
> >  exception_marker:
> > diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
> > index 60436432399f..73d0f53ffc1a 100644
> > --- a/arch/powerpc/kernel/signal.c
> > +++ b/arch/powerpc/kernel/signal.c
> > @@ -277,7 +277,7 @@ static void do_signal(struct task_struct *tsk)
> >  
> >  	rseq_signal_deliver(&ksig, tsk->thread.regs);
> >  
> > -	if (is32) {
> > +	if ((IS_ENABLED(CONFIG_PPC32) || IS_ENABLED(CONFIG_COMPAT)) && is32) {  
> 
> I think we should fix the is_32bit_task definitions instead so that
> callers don't need this mess.  

Yes, that makes sense.

Thanks

Michal