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Subject: Re: [PATCH] powerpc: inline current_stack_pointer()
To: Segher Boessenkool <segher@kernel.crashing.org>
References: <20160523084602.53F771A239A@localhost.localdomain>
 <20160523202214.GB11583@gate.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>, Scott Wood <oss@buserror.net>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
From: Christophe Leroy <christophe.leroy@c-s.fr>
Message-ID: <61305e9e-ed63-6915-709c-dd8797ff1fba@c-s.fr>
Date: Tue, 24 May 2016 07:39:59 +0200
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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