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Date: Mon, 23 May 2016 15:22:14 -0500
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
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
Subject: Re: [PATCH] powerpc: inline current_stack_pointer()
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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.


Segher