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Date:   Tue, 23 Jun 2020 12:44:13 +1000
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     syzbot <syzbot+dbf8cf3717c8ef4a90a0@syzkaller.appspotmail.com>,
        bp@alien8.de, hpa@zytor.com, jmattson@google.com, joro@8bytes.org,
        kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-next@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com,
        sean.j.christopherson@intel.com, syzkaller-bugs@googlegroups.com,
        tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com,
        x86@kernel.org, elver@google.com
Subject: Re: linux-next build error (9)
Message-ID: <20200623124413.08b2bd65@canb.auug.org.au>
In-Reply-To: <20200622094923.GP576888@hirez.programming.kicks-ass.net>
References: <000000000000c25ce105a8a8fcd9@google.com>
        <20200622094923.GP576888@hirez.programming.kicks-ass.net>
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Hi Peter,

On Mon, 22 Jun 2020 11:49:23 +0200 Peter Zijlstra <peterz@infradead.org> wr=
ote:
>
> On Mon, Jun 22, 2020 at 02:37:12AM -0700, syzbot wrote:
> > Hello,
> >=20
> > syzbot found the following crash on:
> >=20
> > HEAD commit:    27f11fea Add linux-next specific files for 20200622
> > git tree:       linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=3D138dc743100=
000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=3D41c659db5ca=
da6f4
> > dashboard link: https://syzkaller.appspot.com/bug?extid=3Ddbf8cf3717c8e=
f4a90a0
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> >=20
> > IMPORTANT: if you fix the bug, please add the following tag to the comm=
it:
> > Reported-by: syzbot+dbf8cf3717c8ef4a90a0@syzkaller.appspotmail.com
> >=20
> > ./arch/x86/include/asm/kvm_para.h:99:29: error: inlining failed in call=
 to always_inline 'kvm_handle_async_pf': function attribute mismatch
> > ./arch/x86/include/asm/processor.h:824:29: error: inlining failed in ca=
ll to always_inline 'prefetchw': function attribute mismatch
> > ./arch/x86/include/asm/current.h:13:44: error: inlining failed in call =
to always_inline 'get_current': function attribute mismatch
> > arch/x86/mm/fault.c:1353:1: error: inlining failed in call to always_in=
line 'handle_page_fault': function attribute mismatch
> > ./arch/x86/include/asm/processor.h:576:29: error: inlining failed in ca=
ll to always_inline 'native_swapgs': function attribute mismatch
> > ./arch/x86/include/asm/fsgsbase.h:33:38: error: inlining failed in call=
 to always_inline 'rdgsbase': function attribute mismatch
> > ./arch/x86/include/asm/irq_stack.h:40:29: error: inlining failed in cal=
l to always_inline 'run_on_irqstack_cond': function attribute mismatch
> > ./include/linux/debug_locks.h:15:28: error: inlining failed in call to =
always_inline '__debug_locks_off': function attribute mismatch
> > ./include/asm-generic/atomic-instrumented.h:70:1: error: inlining faile=
d in call to always_inline 'atomic_add_return': function attribute mismatch
> > kernel/locking/lockdep.c:396:29: error: inlining failed in call to alwa=
ys_inline 'lockdep_recursion_finish': function attribute mismatch
> > kernel/locking/lockdep.c:4725:5: error: inlining failed in call to alwa=
ys_inline '__lock_is_held': function attribute mismatch =20
>=20
> Hurmph, I though that was cured in GCC >=3D 8. Marco?

So what causes this? Because we got a couple of these in our s390 builds la=
st night as well.

kernel/locking/lockdep.c:805:1: error: inlining failed in call to always_in=
line 'look_up_lock_class': function attribute mismatch
include/linux/debug_locks.h:15:28: error: inlining failed in call to always=
_inline '__debug_locks_off': function attribute mismatch

s390-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30

--=20
Cheers,
Stephen Rothwell

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