Re: [PATCH v2 5/6] s390/mm: Batch PTE updates in lazy MMU mode

[Alexander Gordeev]

On Thu, Apr 16, 2026 at 07:40:45AM +0200, Heiko Carstens wrote:
> > +#if !defined(CONFIG_IPTE_BATCH) || defined(__DECOMPRESSOR)
> > +static inline
> > +bool ipte_batch_ptep_test_and_clear_young(struct vm_area_struct *vma,
> > +					  unsigned long addr, pte_t *ptep,
> > +					  int *res)
> > +{
> > +	return false;
> > +}
> 
> Why does this depend on __DECOMPRESSOR? Which code in the decompressor
> would generate a call to the ipte_batch functions?

Any call to ptep_get() or set_pte().