[PATCH 2/9] mm: alloc_contig_freed_pages() added

[Andrew Morton]

On Mon, 17 Oct 2011 14:21:07 +0200
Marek Szyprowski <m.szyprowski at samsung.com> wrote:

> > > +
> > > +void free_contig_pages(unsigned long pfn, unsigned nr_pages)
> > > +{
> > > +	struct page *page = pfn_to_page(pfn);
> > > +
> > > +	while (nr_pages--) {
> > > +		__free_page(page);
> > > +		++pfn;
> > > +		if (likely(zone_pfn_same_memmap(pfn - 1, pfn)))
> > > +			++page;
> > > +		else
> > > +			page = pfn_to_page(pfn);
> > > +	}
> > > +}
> > 
> > You're sure these functions don't need EXPORT_SYMBOL()?  Maybe the
> > design is that only DMA core calls into here (if so, that's good).
> 
> Drivers should not call it, it is intended to be used by low-level DMA
> code.

OK, thanks for checking.

> Do you think that a comment about missing EXPORT_SYMBOL is 
> required?

No.  If someone later wants to use these from a module then we can look
at their reasons and make a decision at that time.