mm: remove nr_pages argument from pagevec_lookup{,_range}()

All users of pagevec_lookup() and pagevec_lookup_range() now pass
PAGEVEC_SIZE as a desired number of pages.

Just drop the argument.

Link: http://lkml.kernel.org/r/20170726114704.7626-11-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/buffer.c

@@ -1633,8 +1633,7 @@ void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len)
 
 	end = (block + len - 1) >> (PAGE_SHIFT - bd_inode->i_blkbits);
 	pagevec_init(&pvec, 0);
-	while (pagevec_lookup_range(&pvec, bd_mapping, &index, end,
+	while (pagevec_lookup_range(&pvec, bd_mapping, &index, end)) {
-				    PAGEVEC_SIZE)) {
 		count = pagevec_count(&pvec);
 		for (i = 0; i < count; i++) {
 			struct page *page = pvec.pages[i];
@@ -3552,7 +3551,7 @@ page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length,
 		unsigned nr_pages, i;
 
 		nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping, &index,
-						end - 1, PAGEVEC_SIZE);
+						end - 1);
 		if (nr_pages == 0)
 			break;
 

fs/ext4/file.c

@@ -468,7 +468,7 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
 		unsigned long nr_pages;
 
 		nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping,
-					&index, end, PAGEVEC_SIZE);
+					&index, end);
 		if (nr_pages == 0)
 			break;
 

fs/ext4/inode.c

@@ -1720,8 +1720,7 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
 
 	pagevec_init(&pvec, 0);
 	while (index <= end) {
-		nr_pages = pagevec_lookup_range(&pvec, mapping, &index, end,
+		nr_pages = pagevec_lookup_range(&pvec, mapping, &index, end);
-						PAGEVEC_SIZE);
 		if (nr_pages == 0)
 			break;
 		for (i = 0; i < nr_pages; i++) {
@@ -2348,7 +2347,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
 	pagevec_init(&pvec, 0);
 	while (start <= end) {
 		nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping,
-						&start, end, PAGEVEC_SIZE);
+						&start, end);
 		if (nr_pages == 0)
 			break;
 		for (i = 0; i < nr_pages; i++) {

fs/fscache/page.c

@@ -1178,7 +1178,7 @@ void __fscache_uncache_all_inode_pages(struct fscache_cookie *cookie,
 	pagevec_init(&pvec, 0);
 	next = 0;
 	do {
-		if (!pagevec_lookup(&pvec, mapping, &next, PAGEVEC_SIZE))
+		if (!pagevec_lookup(&pvec, mapping, &next))
 			break;
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];

fs/hugetlbfs/inode.c

@@ -413,8 +413,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart,
 		/*
 		 * When no more pages are found, we are done.
 		 */
-		if (!pagevec_lookup_range(&pvec, mapping, &next, end - 1,
+		if (!pagevec_lookup_range(&pvec, mapping, &next, end - 1))
-					  PAGEVEC_SIZE))
 			break;
 
 		for (i = 0; i < pagevec_count(&pvec); ++i) {

fs/nilfs2/page.c

@@ -312,7 +312,7 @@ void nilfs_copy_back_pages(struct address_space *dmap,
 
 	pagevec_init(&pvec, 0);
 repeat:
-	n = pagevec_lookup(&pvec, smap, &index, PAGEVEC_SIZE);
+	n = pagevec_lookup(&pvec, smap, &index);
 	if (!n)
 		return;
 

include/linux/pagevec.h

@@ -29,13 +29,12 @@ unsigned pagevec_lookup_entries(struct pagevec *pvec,
 void pagevec_remove_exceptionals(struct pagevec *pvec);
 unsigned pagevec_lookup_range(struct pagevec *pvec,
 			      struct address_space *mapping,
-			      pgoff_t *start, pgoff_t end, unsigned nr_pages);
+			      pgoff_t *start, pgoff_t end);
 static inline unsigned pagevec_lookup(struct pagevec *pvec,
 				      struct address_space *mapping,
-				      pgoff_t *start, unsigned nr_pages)
+				      pgoff_t *start)
 {
-	return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1,
+	return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1);
-				    nr_pages);
 }
 
 unsigned pagevec_lookup_tag(struct pagevec *pvec,

mm/swap.c

@@ -967,10 +967,9 @@ void pagevec_remove_exceptionals(struct pagevec *pvec)
  * reached.
  */
 unsigned pagevec_lookup_range(struct pagevec *pvec,
-		struct address_space *mapping, pgoff_t *start, pgoff_t end,
+		struct address_space *mapping, pgoff_t *start, pgoff_t end)
-		unsigned nr_pages)
 {
-	pvec->nr = find_get_pages_range(mapping, start, end, nr_pages,
+	pvec->nr = find_get_pages_range(mapping, start, end, PAGEVEC_SIZE,
 					pvec->pages);
 	return pagevec_count(pvec);
 }