--- zzzz-none-000/linux-3.10.107/fs/jfs/jfs_metapage.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/jfs/jfs_metapage.c	2021-02-04 17:41:59.000000000 +0000
@@ -183,30 +183,23 @@
 
 #endif
 
-static void init_once(void *foo)
-{
-	struct metapage *mp = (struct metapage *)foo;
-
-	mp->lid = 0;
-	mp->lsn = 0;
-	mp->flag = 0;
-	mp->data = NULL;
-	mp->clsn = 0;
-	mp->log = NULL;
-	set_bit(META_free, &mp->flag);
-	init_waitqueue_head(&mp->wait);
-}
-
 static inline struct metapage *alloc_metapage(gfp_t gfp_mask)
 {
-	return mempool_alloc(metapage_mempool, gfp_mask);
+	struct metapage *mp = mempool_alloc(metapage_mempool, gfp_mask);
+
+	if (mp) {
+		mp->lid = 0;
+		mp->lsn = 0;
+		mp->data = NULL;
+		mp->clsn = 0;
+		mp->log = NULL;
+		init_waitqueue_head(&mp->wait);
+	}
+	return mp;
 }
 
 static inline void free_metapage(struct metapage *mp)
 {
-	mp->flag = 0;
-	set_bit(META_free, &mp->flag);
-
 	mempool_free(mp, metapage_mempool);
 }
 
@@ -216,7 +209,7 @@
 	 * Allocate the metapage structures
 	 */
 	metapage_cache = kmem_cache_create("jfs_mp", sizeof(struct metapage),
-					   0, 0, init_once);
+					   0, 0, NULL);
 	if (metapage_cache == NULL)
 		return -ENOMEM;
 
@@ -283,11 +276,11 @@
 	unlock_page(page);
 }
 
-static void metapage_read_end_io(struct bio *bio, int err)
+static void metapage_read_end_io(struct bio *bio)
 {
 	struct page *page = bio->bi_private;
 
-	if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
+	if (bio->bi_error) {
 		printk(KERN_ERR "metapage_read_end_io: I/O error\n");
 		SetPageError(page);
 	}
@@ -338,13 +331,13 @@
 	end_page_writeback(page);
 }
 
-static void metapage_write_end_io(struct bio *bio, int err)
+static void metapage_write_end_io(struct bio *bio)
 {
 	struct page *page = bio->bi_private;
 
 	BUG_ON(!PagePrivate(page));
 
-	if (! test_bit(BIO_UPTODATE, &bio->bi_flags)) {
+	if (bio->bi_error) {
 		printk(KERN_ERR "metapage_write_end_io: I/O error\n");
 		SetPageError(page);
 	}
@@ -416,7 +409,7 @@
 			 * count from hitting zero before we're through
 			 */
 			inc_io(page);
-			if (!bio->bi_size)
+			if (!bio->bi_iter.bi_size)
 				goto dump_bio;
 			submit_bio(WRITE, bio);
 			nr_underway++;
@@ -438,7 +431,7 @@
 
 		bio = bio_alloc(GFP_NOFS, 1);
 		bio->bi_bdev = inode->i_sb->s_bdev;
-		bio->bi_sector = pblock << (inode->i_blkbits - 9);
+		bio->bi_iter.bi_sector = pblock << (inode->i_blkbits - 9);
 		bio->bi_end_io = metapage_write_end_io;
 		bio->bi_private = page;
 
@@ -452,7 +445,7 @@
 	if (bio) {
 		if (bio_add_page(bio, page, bio_bytes, bio_offset) < bio_bytes)
 				goto add_failed;
-		if (!bio->bi_size)
+		if (!bio->bi_iter.bi_size)
 			goto dump_bio;
 
 		submit_bio(WRITE, bio);
@@ -517,7 +510,8 @@
 
 			bio = bio_alloc(GFP_NOFS, 1);
 			bio->bi_bdev = inode->i_sb->s_bdev;
-			bio->bi_sector = pblock << (inode->i_blkbits - 9);
+			bio->bi_iter.bi_sector =
+				pblock << (inode->i_blkbits - 9);
 			bio->bi_end_io = metapage_read_end_io;
 			bio->bi_private = page;
 			len = xlen << inode->i_blkbits;
@@ -571,9 +565,10 @@
 	return ret;
 }
 
-static void metapage_invalidatepage(struct page *page, unsigned long offset)
+static void metapage_invalidatepage(struct page *page, unsigned int offset,
+				    unsigned int length)
 {
-	BUG_ON(offset);
+	BUG_ON(offset || length < PAGE_CACHE_SIZE);
 
 	BUG_ON(PageWriteback(page));
 
@@ -646,7 +641,7 @@
 	if (mp) {
 		if (mp->logical_size != size) {
 			jfs_error(inode->i_sb,
-				  "__get_metapage: mp->logical_size != size");
+				  "get_mp->logical_size != size\n");
 			jfs_err("logical_size = %d, size = %d",
 				mp->logical_size, size);
 			dump_stack();
@@ -657,8 +652,7 @@
 		if (test_bit(META_discard, &mp->flag)) {
 			if (!new) {
 				jfs_error(inode->i_sb,
-					  "__get_metapage: using a "
-					  "discarded metapage");
+					  "using a discarded metapage\n");
 				discard_metapage(mp);
 				goto unlock;
 			}