mm/memory_hotplug: cleanup __remove_pages()

void __remove_pages(unsigned long pfn, unsigned long nr_pages,

		    struct vmem_altmap *altmap)

{

	const unsigned long end_pfn = pfn + nr_pages;

	unsigned long cur_nr_pages;

	unsigned long map_offset = 0;

	unsigned long nr, start_sec, end_sec;

	map_offset = vmem_altmap_offset(altmap);

	if (check_pfn_span(pfn, nr_pages, "remove"))

		return;

	start_sec = pfn_to_section_nr(pfn);

	end_sec = pfn_to_section_nr(pfn + nr_pages - 1);

	for (nr = start_sec; nr <= end_sec; nr++) {

		unsigned long pfns;

	for (; pfn < end_pfn; pfn += cur_nr_pages) {

		cond_resched();

		pfns = min(nr_pages, PAGES_PER_SECTION

				- (pfn & ~PAGE_SECTION_MASK));

		__remove_section(pfn, pfns, map_offset, altmap);

		pfn += pfns;

		nr_pages -= pfns;

		/* Select all remaining pages up to the next section boundary */

		cur_nr_pages = min(end_pfn - pfn, -(pfn | PAGE_SECTION_MASK));

		__remove_section(pfn, cur_nr_pages, map_offset, altmap);

		map_offset = 0;

	}

}