From: Will Deacon <will@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-s390@vger.kernel.org, bigeasy@linutronix.de,
x86@kernel.org, heiko.carstens@de.ibm.com,
linux-kernel@vger.kernel.org, rostedt@goodmis.org,
davem@davemloft.net, a.darwish@linutronix.de,
sparclinux@vger.kernel.org, linux@armlinux.org.uk,
tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org,
mingo@kernel.org
Subject: Re: [PATCH v4 6/8] arm: Break cyclic percpu include
Date: Thu, 25 Jun 2020 08:31:45 +0100 [thread overview]
Message-ID: <20200625073145.GA7444@willie-the-truck> (raw)
In-Reply-To: <20200624175320.GN4781@hirez.programming.kicks-ass.net>
On Wed, Jun 24, 2020 at 07:53:20PM +0200, Peter Zijlstra wrote:
> On Tue, Jun 23, 2020 at 10:02:57AM +0100, Will Deacon wrote:
> > On Tue, Jun 23, 2020 at 10:36:51AM +0200, Peter Zijlstra wrote:
> > > In order to use <asm/percpu.h> in irqflags.h, we need to make sure
> > > asm/percpu.h does not itself depend on irqflags.h.
> > >
> > > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > > ---
> > > arch/arm/include/asm/percpu.h | 2 ++
> > > 1 file changed, 2 insertions(+)
> > >
> > > --- a/arch/arm/include/asm/percpu.h
> > > +++ b/arch/arm/include/asm/percpu.h
> > > @@ -10,6 +10,8 @@
> > > * in the TPIDRPRW. TPIDRPRW only exists on V6K and V7
> > > */
> > > #if defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6)
> > > +register unsigned long current_stack_pointer asm ("sp");
> >
> > If you define this unconditionally, then we can probably get rid of the
> > copy in asm/thread_info.h, rather than duplicate the same #define.
>
> The below delta seems to build arm-allnoconfig, arm-defconfig and
> arm-allmodconfig.
>
> Although please don't ask me how asm/thread_info.h includes asm/percpu.h
>
> Does that work for you?
Yes, thanks! I can't believe you removed the helpful comment.
> -/*
> - * how to get the current stack pointer in C
> - */
Will
next prev parent reply other threads:[~2020-06-25 7:33 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 8:36 [PATCH v4 0/8] lockdep: Change IRQ state tracking to use per-cpu variables Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 1/8] lockdep: Prepare for NMI IRQ state tracking Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 2/8] x86/entry: Fix NMI vs " Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 3/8] sparc64: Fix asm/percpu.h build error Peter Zijlstra
2020-06-23 21:35 ` David Miller
2020-06-23 8:36 ` [PATCH v4 4/8] powerpc64: Break asm/percpu.h vs spinlock_types.h dependency Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 5/8] s390: Break cyclic percpu include Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 6/8] arm: " Peter Zijlstra
2020-06-23 9:02 ` Will Deacon
2020-06-24 17:53 ` Peter Zijlstra
2020-06-25 7:31 ` Will Deacon [this message]
2020-06-23 8:36 ` [PATCH v4 7/8] lockdep: Change hardirq{s_enabled, _context} to per-cpu variables Peter Zijlstra
2020-06-23 15:00 ` [PATCH v4 7/8] lockdep: Change hardirq{s_enabled,_context} " Ahmed S. Darwish
2020-06-23 15:24 ` Peter Zijlstra
2020-06-23 16:13 ` Ahmed S. Darwish
2020-06-23 16:37 ` Peter Zijlstra
2020-06-23 17:59 ` Marco Elver
2020-06-23 18:12 ` Peter Zijlstra
2020-06-23 18:39 ` Marco Elver
2020-06-23 19:13 ` Marco Elver
2020-06-23 19:41 ` Peter Zijlstra
2020-06-23 20:08 ` Peter Zijlstra
2020-06-23 20:24 ` Peter Zijlstra
2020-06-23 20:33 ` Peter Zijlstra
2020-06-24 9:00 ` Peter Zijlstra
2020-06-24 10:17 ` Marco Elver
2020-06-24 12:31 ` Peter Zijlstra
2020-06-24 11:32 ` Marco Elver
2020-06-24 15:18 ` Peter Zijlstra
2020-06-30 5:59 ` Ahmed S. Darwish
2020-06-30 9:40 ` Peter Zijlstra
2020-06-23 8:36 ` [PATCH v4 8/8] lockdep: Remove lockdep_hardirq{s_enabled, _context}() argument Peter Zijlstra
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