[PATCH] powerpc/kernel: Make syscall_exit a local label

[Michael Ellerman]

On Fri, 2014-12-05 at 10:27 +0000, David Laight wrote:
> From: Michael Ellerman
> > diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
> > index 0905c8da90f1..d8828e50dbef 100644
> > --- a/arch/powerpc/kernel/entry_64.S
> > +++ b/arch/powerpc/kernel/entry_64.S
> > @@ -178,7 +178,7 @@ system_call:			/* label this so stack traces look sane */
> >  	mtctr   r12
> >  	bctrl			/* Call handler */
> 
> Why not add a 'nop' here instead?

Because we'd rather not add extra instructions to the syscall path unless we
really need to. A local label seems like the preferable solution to me.

cheers