linux-kernel - Re: [PATCH] powerpc: inline current_stack

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Message-ID: <61305e9e-ed63-6915-709c-dd8797ff1fba@c-s.fr>
Date:	Tue, 24 May 2016 07:39:59 +0200
From:	Christophe Leroy <christophe.leroy@....fr>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Scott Wood <oss@...error.net>, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc: inline current_stack_pointer()


Le 23/05/2016 à 22:22, Segher Boessenkool a écrit :
> On Mon, May 23, 2016 at 10:46:02AM +0200, Christophe Leroy wrote:
>> +static inline unsigned long current_stack_pointer(void)
>> +{
>> +	register unsigned long *ptr asm("r1");
>> +
>> +	return *ptr;
>> +}
> Register asm is only guaranteed to work as input to inline asm.  NAK.
>
Does it mean that the following declaration in 
arch/powerpc/include/asm/paca.h is wrong too ?

register struct paca_struct *local_paca asm("r13");

Christophe