mm, pagevec: remove cold parameter for pagevecs

Every pagevec_init user claims the pages being released are hot even in
cases where it is unlikely the pages are hot.  As no one cares about the
hotness of pages being released to the allocator, just ditch the
parameter.

No performance impact is expected as the overhead is marginal.  The
parameter is removed simply because it is a bit stupid to have a useless
parameter copied everywhere.

Link: http://lkml.kernel.org/r/20171018075952.10627-6-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -1859,7 +1859,7 @@ static void i915_address_space_init(struct i915_address_space *vm,
 	INIT_LIST_HEAD(&vm->unbound_list);
 
 	list_add_tail(&vm->global_link, &dev_priv->vm_list);
-	pagevec_init(&vm->free_pages, false);
+	pagevec_init(&vm->free_pages);
 }
 
 static void i915_address_space_fini(struct i915_address_space *vm)

fs/afs/write.c

@@ -308,7 +308,7 @@ static void afs_kill_pages(struct afs_vnode *vnode, bool error,
 	_enter("{%x:%u},%lx-%lx",
 	       vnode->fid.vid, vnode->fid.vnode, first, last);
 
-	pagevec_init(&pv, 0);
+	pagevec_init(&pv);
 
 	do {
 		_debug("kill %lx-%lx", first, last);
@@ -602,7 +602,7 @@ void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
 
 	ASSERT(wb != NULL);
 
-	pagevec_init(&pv, 0);
+	pagevec_init(&pv);
 
 	do {
 		_debug("done %lx-%lx", first, last);

fs/btrfs/extent_io.c

@@ -3797,7 +3797,7 @@ int btree_write_cache_pages(struct address_space *mapping,
 	int scanned = 0;
 	int tag;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	if (wbc->range_cyclic) {
 		index = mapping->writeback_index; /* Start from prev offset */
 		end = -1;
@@ -3936,7 +3936,7 @@ static int extent_write_cache_pages(struct address_space *mapping,
 	if (!igrab(inode))
 		return 0;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	if (wbc->range_cyclic) {
 		index = mapping->writeback_index; /* Start from prev offset */
 		end = -1;

fs/buffer.c

@@ -1592,7 +1592,7 @@ void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len)
 	struct buffer_head *head;
 
 	end = (block + len - 1) >> (PAGE_SHIFT - bd_inode->i_blkbits);
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (pagevec_lookup_range(&pvec, bd_mapping, &index, end)) {
 		count = pagevec_count(&pvec);
 		for (i = 0; i < count; i++) {
@@ -3514,7 +3514,7 @@ page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length,
 	if (length <= 0)
 		return -ENOENT;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	do {
 		unsigned nr_pages, i;

fs/cachefiles/rdwr.c

@@ -710,7 +710,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
 	/* calculate the shift required to use bmap */
 	shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
 
-	pagevec_init(&pagevec, 0);
+	pagevec_init(&pagevec);
 
 	op->op.flags &= FSCACHE_OP_KEEP_FLAGS;
 	op->op.flags |= FSCACHE_OP_ASYNC;
@@ -844,7 +844,7 @@ int cachefiles_allocate_pages(struct fscache_retrieval *op,
 
 	ret = cachefiles_has_space(cache, 0, *nr_pages);
 	if (ret == 0) {
-		pagevec_init(&pagevec, 0);
+		pagevec_init(&pagevec);
 
 		list_for_each_entry(page, pages, lru) {
 			if (pagevec_add(&pagevec, page) == 0)

fs/ceph/addr.c

@@ -680,7 +680,7 @@ static void ceph_release_pages(struct page **pages, int num)
 	struct pagevec pvec;
 	int i;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	for (i = 0; i < num; i++) {
 		if (pagevec_add(&pvec, pages[i]) == 0)
 			pagevec_release(&pvec);
@@ -811,7 +811,7 @@ static int ceph_writepages_start(struct address_space *mapping,
 	if (fsc->mount_options->wsize < wsize)
 		wsize = fsc->mount_options->wsize;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	start_index = wbc->range_cyclic ? mapping->writeback_index : 0;
 	index = start_index;

fs/dax.c

@@ -794,7 +794,7 @@ int dax_writeback_mapping_range(struct address_space *mapping,
 
 	tag_pages_for_writeback(mapping, start_index, end_index);
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (!done) {
 		pvec.nr = find_get_entries_tag(mapping, start_index,
 				PAGECACHE_TAG_TOWRITE, PAGEVEC_SIZE,

fs/ext4/inode.c

@@ -1719,7 +1719,7 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
 		ext4_es_remove_extent(inode, start, last - start + 1);
 	}
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (index <= end) {
 		nr_pages = pagevec_lookup_range(&pvec, mapping, &index, end);
 		if (nr_pages == 0)
@@ -2345,7 +2345,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
 	lblk = start << bpp_bits;
 	pblock = mpd->map.m_pblk;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (start <= end) {
 		nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping,
 						&start, end);
@@ -2616,7 +2616,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 	else
 		tag = PAGECACHE_TAG_DIRTY;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	mpd->map.m_len = 0;
 	mpd->next_page = index;
 	while (index <= end) {

fs/f2fs/checkpoint.c

@@ -314,7 +314,7 @@ long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
 	};
 	struct blk_plug plug;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	blk_start_plug(&plug);
 

fs/f2fs/data.c

@@ -1635,7 +1635,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 	int range_whole = 0;
 	int tag;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	if (get_dirty_pages(mapping->host) <=
 				SM_I(F2FS_M_SB(mapping))->min_hot_blocks)

fs/f2fs/node.c

@@ -1282,7 +1282,7 @@ static struct page *last_fsync_dnode(struct f2fs_sb_info *sbi, nid_t ino)
 	struct page *last_page = NULL;
 	int nr_pages;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	index = 0;
 
 	while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
@@ -1436,7 +1436,7 @@ int fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
 			return PTR_ERR_OR_ZERO(last_page);
 	}
 retry:
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	index = 0;
 
 	while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
@@ -1547,7 +1547,7 @@ int sync_node_pages(struct f2fs_sb_info *sbi, struct writeback_control *wbc,
 	int ret = 0;
 	int nr_pages;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 next_step:
 	index = 0;
@@ -1648,7 +1648,7 @@ int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)
 	int ret2, ret = 0;
 	int nr_pages;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index,
 				PAGECACHE_TAG_WRITEBACK))) {

fs/fscache/page.c

@@ -1175,7 +1175,7 @@ void __fscache_uncache_all_inode_pages(struct fscache_cookie *cookie,
 		return;
 	}
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	next = 0;
 	do {
 		if (!pagevec_lookup(&pvec, mapping, &next))

fs/gfs2/aops.c

@@ -371,7 +371,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
 	int range_whole = 0;
 	int tag;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	if (wbc->range_cyclic) {
 		writeback_index = mapping->writeback_index; /* prev offset */
 		index = writeback_index;

fs/hugetlbfs/inode.c

@@ -407,7 +407,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart,
 
 	memset(&pseudo_vma, 0, sizeof(struct vm_area_struct));
 	pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED);
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	next = start;
 	while (next < end) {
 		/*

fs/nilfs2/btree.c

@@ -2156,7 +2156,7 @@ static void nilfs_btree_lookup_dirty_buffers(struct nilfs_bmap *btree,
 	     level++)
 		INIT_LIST_HEAD(&lists[level]);
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	while (pagevec_lookup_tag(&pvec, btcache, &index,
 					PAGECACHE_TAG_DIRTY)) {

fs/nilfs2/page.c

@@ -255,7 +255,7 @@ int nilfs_copy_dirty_pages(struct address_space *dmap,
 	pgoff_t index = 0;
 	int err = 0;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 repeat:
 	if (!pagevec_lookup_tag(&pvec, smap, &index, PAGECACHE_TAG_DIRTY))
 		return 0;
@@ -309,7 +309,7 @@ void nilfs_copy_back_pages(struct address_space *dmap,
 	pgoff_t index = 0;
 	int err;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 repeat:
 	n = pagevec_lookup(&pvec, smap, &index);
 	if (!n)
@@ -373,7 +373,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
 	unsigned int i;
 	pgoff_t index = 0;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	while (pagevec_lookup_tag(&pvec, mapping, &index,
 					PAGECACHE_TAG_DIRTY)) {
@@ -518,7 +518,7 @@ unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
 	index = start_blk >> (PAGE_SHIFT - inode->i_blkbits);
 	nblocks_in_page = 1U << (PAGE_SHIFT - inode->i_blkbits);
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 repeat:
 	pvec.nr = find_get_pages_contig(inode->i_mapping, index, PAGEVEC_SIZE,

fs/nilfs2/segment.c

@@ -708,7 +708,7 @@ static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode,
 		index = start >> PAGE_SHIFT;
 		last = end >> PAGE_SHIFT;
 	}
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
  repeat:
 	if (unlikely(index > last) ||
 	    !pagevec_lookup_range_tag(&pvec, mapping, &index, last,
@@ -753,7 +753,7 @@ static void nilfs_lookup_dirty_node_buffers(struct inode *inode,
 	unsigned int i;
 	pgoff_t index = 0;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 
 	while (pagevec_lookup_tag(&pvec, mapping, &index,
 					PAGECACHE_TAG_DIRTY)) {

include/linux/pagevec.h

@@ -17,7 +17,6 @@ struct address_space;
 
 struct pagevec {
 	unsigned long nr;
-	bool cold;
 	bool drained;
 	struct page *pages[PAGEVEC_SIZE];
 };
@@ -51,10 +50,9 @@ static inline unsigned pagevec_lookup_tag(struct pagevec *pvec,
 	return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag);
 }
 
-static inline void pagevec_init(struct pagevec *pvec, int cold)
+static inline void pagevec_init(struct pagevec *pvec)
 {
 	pvec->nr = 0;
-	pvec->cold = cold;
 	pvec->drained = false;
 }
 

mm/filemap.c

@@ -519,7 +519,7 @@ static void __filemap_fdatawait_range(struct address_space *mapping,
 	if (end_byte < start_byte)
 		return;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (index <= end) {
 		unsigned i;
 

mm/mlock.c

@@ -289,7 +289,7 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
 	struct pagevec pvec_putback;
 	int pgrescued = 0;
 
-	pagevec_init(&pvec_putback, 0);
+	pagevec_init(&pvec_putback);
 
 	/* Phase 1: page isolation */
 	spin_lock_irq(zone_lru_lock(zone));
@@ -448,7 +448,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
 		struct pagevec pvec;
 		struct zone *zone;
 
-		pagevec_init(&pvec, 0);
+		pagevec_init(&pvec);
 		/*
 		 * Although FOLL_DUMP is intended for get_dump_page(),
 		 * it just so happens that its special treatment of the

mm/page-writeback.c

@@ -2168,7 +2168,7 @@ int write_cache_pages(struct address_space *mapping,
 	int range_whole = 0;
 	int tag;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	if (wbc->range_cyclic) {
 		writeback_index = mapping->writeback_index; /* prev offset */
 		index = writeback_index;

mm/shmem.c

@@ -747,7 +747,7 @@ void shmem_unlock_mapping(struct address_space *mapping)
 	pgoff_t indices[PAGEVEC_SIZE];
 	pgoff_t index = 0;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	/*
 	 * Minor point, but we might as well stop if someone else SHM_LOCKs it.
 	 */
@@ -790,7 +790,7 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
 	if (lend == -1)
 		end = -1;	/* unsigned, so actually very big */
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	index = start;
 	while (index < end) {
 		pvec.nr = find_get_entries(mapping, index,
@@ -2528,7 +2528,7 @@ static pgoff_t shmem_seek_hole_data(struct address_space *mapping,
 	bool done = false;
 	int i;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	pvec.nr = 1;		/* start small: we may be there already */
 	while (!done) {
 		pvec.nr = find_get_entries(mapping, index,

mm/swap.c

@@ -210,7 +210,7 @@ static void pagevec_lru_move_fn(struct pagevec *pvec,
 	}
 	if (pgdat)
 		spin_unlock_irqrestore(&pgdat->lru_lock, flags);
-	release_pages(pvec->pages, pvec->nr, pvec->cold);
+	release_pages(pvec->pages, pvec->nr, 0);
 	pagevec_reinit(pvec);
 }
 
@@ -837,7 +837,7 @@ void __pagevec_release(struct pagevec *pvec)
 		lru_add_drain();
 		pvec->drained = true;
 	}
-	release_pages(pvec->pages, pagevec_count(pvec), pvec->cold);
+	release_pages(pvec->pages, pagevec_count(pvec), 0);
 	pagevec_reinit(pvec);
 }
 EXPORT_SYMBOL(__pagevec_release);

mm/truncate.c

@@ -330,7 +330,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
 	else
 		end = (lend + 1) >> PAGE_SHIFT;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	index = start;
 	while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE),
@@ -342,7 +342,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
 		 */
 		struct pagevec locked_pvec;
 
-		pagevec_init(&locked_pvec, 0);
+		pagevec_init(&locked_pvec);
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -553,7 +553,7 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
 	unsigned long count = 0;
 	int i;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
 			indices)) {
@@ -683,7 +683,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 	if (mapping->nrpages == 0 && mapping->nrexceptional == 0)
 		goto out;
 
-	pagevec_init(&pvec, 0);
+	pagevec_init(&pvec);
 	index = start;
 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,