[PATCH 02/10] ARM: hotplug cpu: setup 1:1 map for entire kernel image for secondary CPUs

[Russell King - ARM Linux]

On Mon, Oct 04, 2010 at 02:20:47PM -0400, Nicolas Pitre wrote:
> On Mon, 4 Oct 2010, Russell King - ARM Linux wrote:
> 
> > +static inline void identity_mapping_add(pgd_t *pgd, unsigned long start,
> > +	unsigned long end)
> > +{
> > +	unsigned long addr, prot;
> > +	pmd_t *pmd;
> > +
> > +	prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE;
> > +	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
> > +		prot |= PMD_BIT4;
> 
> Is there any SMP capable implementation where the above test is 
> useful?

Probably not, but if someone decides to clean that up (and copy it
into arch/arm/mm/mmu.c for setup_mm_for_reboot()) I'd rather it be
there.