mm: remove pagevec_swap_free()

void __pagevec_free(struct pagevec *pvec);

void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru);

void pagevec_strip(struct pagevec *pvec);

void pagevec_swap_free(struct pagevec *pvec);

unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,

		pgoff_t start, unsigned nr_pages);

unsigned pagevec_lookup_tag(struct pagevec *pvec,

	}

}

/**

 * pagevec_swap_free - try to free swap space from the pages in a pagevec

 * @pvec: pagevec with swapcache pages to free the swap space of

 *

 * The caller needs to hold an extra reference to each page and

 * not hold the page lock on the pages.  This function uses a

 * trylock on the page lock so it may not always free the swap

 * space associated with a page.

 */

void pagevec_swap_free(struct pagevec *pvec)

{

	int i;

	for (i = 0; i < pagevec_count(pvec); i++) {

		struct page *page = pvec->pages[i];

		if (PageSwapCache(page) && trylock_page(page)) {

			try_to_free_swap(page);

			unlock_page(page);

		}

	}

}

/**

 * pagevec_lookup - gang pagecache lookup

 * @pvec:	Where the resulting pages are placed