[PATCH v4 21/66] mm/mmap: Change do_brk_flags() to expand existing VMA and add do_brk_munmap()

[Liam Howlett]

* Vlastimil Babka <vbabka at suse.cz> [220113 10:28]:
> On 12/1/21 15:29, Liam Howlett wrote:
> > @@ -1989,6 +2013,7 @@ EXPORT_SYMBOL(get_unmapped_area);
> >  struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
> >  {
> >  	struct vm_area_struct *vma;
> > +	MA_STATE(mas, &mm->mm_mt, addr, addr);
> >  
> >  	mmap_assert_locked(mm);
> >  	/* Check the cache first. */
> > @@ -1996,7 +2021,7 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
> >  	if (likely(vma))
> >  		return vma;
> >  
> > -	vma = mt_find(&mm->mm_mt, &addr, ULONG_MAX);
> > +	vma = mas_find(&mas, -1);
> >  	if (vma)
> >  		vmacache_update(addr, vma);
> >  	return vma;
> 
> Oh and this change to find_vma() was supposed to go to the next patch, no?


Yes, thanks.  I will relocate this change to the next patch.