[PATCH v6 6/7] arm64, jump label: optimize jump label implementation

Will Deacon will.deacon at arm.com
Fri Dec 13 10:55:13 EST 2013


On Fri, Dec 13, 2013 at 03:50:23PM +0000, Steven Rostedt wrote:
> On Fri, 13 Dec 2013 15:41:04 +0000
> Will Deacon <will.deacon at arm.com> wrote:
> 
> > > +#include <linux/kernel.h>
> > > +#include <linux/jump_label.h>
> > > +#include <asm/jump_label.h>
> > > +#include <asm/insn.h>
> > > +
> > > +#ifdef HAVE_JUMP_LABEL
> > 
> > Slightly worrying... this should be CONFIG_HAVE_JUMP_LABEL, right? How did
> > you manage to test this code?
> 
> In <linux/jump_label.h> we have:
> 
> #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
> 
> [...]
> 
> # include <asm/jump_label.h>
> # define HAVE_JUMP_LABEL
> #endif	/* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */
> 

Phew, that explains things! Cheers, Steve.

Will



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