Merge branch 'master' into next

Conflicts:
	fs/nfsd/nfs4recover.c

Manually fixed above to use new creds API functions, e.g.
nfs4_save_creds().

Signed-off-by: James Morris <jmorris@namei.org>

14 files changed, 221 insertions, 109 deletions

diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index 0a6aa2cc78f0..b49884c8c10e 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -234,8 +234,8 @@ int ubifs_bg_thread(void *info)
 	int err;
 	struct ubifs_info *c = info;
 
-	ubifs_msg("background thread \"%s\" started, PID %d",
-		  c->bgt_name, current->pid);
+	dbg_msg("background thread \"%s\" started, PID %d",
+		c->bgt_name, current->pid);
 	set_freezable();
 
 	while (1) {
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 7186400750e7..510ffa0bbda4 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -101,21 +101,24 @@ static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
 	if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) {
 		switch (type) {
 		case UBIFS_INO_KEY:
-			sprintf(p, "(%lu, %s)", key_inum(c, key),
+			sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key),
 			       get_key_type(type));
 			break;
 		case UBIFS_DENT_KEY:
 		case UBIFS_XENT_KEY:
-			sprintf(p, "(%lu, %s, %#08x)", key_inum(c, key),
+			sprintf(p, "(%lu, %s, %#08x)",
+				(unsigned long)key_inum(c, key),
 				get_key_type(type), key_hash(c, key));
 			break;
 		case UBIFS_DATA_KEY:
-			sprintf(p, "(%lu, %s, %u)", key_inum(c, key),
+			sprintf(p, "(%lu, %s, %u)",
+				(unsigned long)key_inum(c, key),
 				get_key_type(type), key_block(c, key));
 			break;
 		case UBIFS_TRUN_KEY:
 			sprintf(p, "(%lu, %s)",
-				key_inum(c, key), get_key_type(type));
+				(unsigned long)key_inum(c, key),
+				get_key_type(type));
 			break;
 		default:
 			sprintf(p, "(bad key type: %#08x, %#08x)",
@@ -364,8 +367,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
 		       le32_to_cpu(mst->ihead_lnum));
 		printk(KERN_DEBUG "\tihead_offs     %u\n",
 		       le32_to_cpu(mst->ihead_offs));
-		printk(KERN_DEBUG "\tindex_size     %u\n",
-		       le32_to_cpu(mst->index_size));
+		printk(KERN_DEBUG "\tindex_size     %llu\n",
+		       (unsigned long long)le64_to_cpu(mst->index_size));
 		printk(KERN_DEBUG "\tlpt_lnum       %u\n",
 		       le32_to_cpu(mst->lpt_lnum));
 		printk(KERN_DEBUG "\tlpt_offs       %u\n",
@@ -1589,7 +1592,7 @@ static struct fsck_inode *add_inode(struct ubifs_info *c,
 
 	if (inum > c->highest_inum) {
 		ubifs_err("too high inode number, max. is %lu",
-			  c->highest_inum);
+			  (unsigned long)c->highest_inum);
 		return ERR_PTR(-EINVAL);
 	}
 
@@ -1668,16 +1671,18 @@ static struct fsck_inode *read_add_inode(struct ubifs_info *c,
 	ino_key_init(c, &key, inum);
 	err = ubifs_lookup_level0(c, &key, &znode, &n);
 	if (!err) {
-		ubifs_err("inode %lu not found in index", inum);
+		ubifs_err("inode %lu not found in index", (unsigned long)inum);
 		return ERR_PTR(-ENOENT);
 	} else if (err < 0) {
-		ubifs_err("error %d while looking up inode %lu", err, inum);
+		ubifs_err("error %d while looking up inode %lu",
+			  err, (unsigned long)inum);
 		return ERR_PTR(err);
 	}
 
 	zbr = &znode->zbranch[n];
 	if (zbr->len < UBIFS_INO_NODE_SZ) {
-		ubifs_err("bad node %lu node length %d", inum, zbr->len);
+		ubifs_err("bad node %lu node length %d",
+			  (unsigned long)inum, zbr->len);
 		return ERR_PTR(-EINVAL);
 	}
 
@@ -1697,7 +1702,7 @@ static struct fsck_inode *read_add_inode(struct ubifs_info *c,
 	kfree(ino);
 	if (IS_ERR(fscki)) {
 		ubifs_err("error %ld while adding inode %lu node",
-			  PTR_ERR(fscki), inum);
+			  PTR_ERR(fscki), (unsigned long)inum);
 		return fscki;
 	}
 
@@ -1786,7 +1791,8 @@ static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 		if (IS_ERR(fscki)) {
 			err = PTR_ERR(fscki);
 			ubifs_err("error %d while processing data node and "
-				  "trying to find inode node %lu", err, inum);
+				  "trying to find inode node %lu",
+				  err, (unsigned long)inum);
 			goto out_dump;
 		}
 
@@ -1819,7 +1825,8 @@ static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 		if (IS_ERR(fscki)) {
 			err = PTR_ERR(fscki);
 			ubifs_err("error %d while processing entry node and "
-				  "trying to find inode node %lu", err, inum);
+				  "trying to find inode node %lu",
+				  err, (unsigned long)inum);
 			goto out_dump;
 		}
 
@@ -1832,7 +1839,7 @@ static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 			err = PTR_ERR(fscki);
 			ubifs_err("error %d while processing entry node and "
 				  "trying to find parent inode node %lu",
-				  err, inum);
+				  err, (unsigned long)inum);
 			goto out_dump;
 		}
 
@@ -1923,7 +1930,8 @@ static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd)
 			    fscki->references != 1) {
 				ubifs_err("directory inode %lu has %d "
 					  "direntries which refer it, but "
-					  "should be 1", fscki->inum,
+					  "should be 1",
+					  (unsigned long)fscki->inum,
 					  fscki->references);
 				goto out_dump;
 			}
@@ -1931,27 +1939,29 @@ static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd)
 			    fscki->references != 0) {
 				ubifs_err("root inode %lu has non-zero (%d) "
 					  "direntries which refer it",
-					  fscki->inum, fscki->references);
+					  (unsigned long)fscki->inum,
+					  fscki->references);
 				goto out_dump;
 			}
 			if (fscki->calc_sz != fscki->size) {
 				ubifs_err("directory inode %lu size is %lld, "
 					  "but calculated size is %lld",
-					  fscki->inum, fscki->size,
-					  fscki->calc_sz);
+					  (unsigned long)fscki->inum,
+					  fscki->size, fscki->calc_sz);
 				goto out_dump;
 			}
 			if (fscki->calc_cnt != fscki->nlink) {
 				ubifs_err("directory inode %lu nlink is %d, "
 					  "but calculated nlink is %d",
-					  fscki->inum, fscki->nlink,
-					  fscki->calc_cnt);
+					  (unsigned long)fscki->inum,
+					  fscki->nlink, fscki->calc_cnt);
 				goto out_dump;
 			}
 		} else {
 			if (fscki->references != fscki->nlink) {
 				ubifs_err("inode %lu nlink is %d, but "
-					  "calculated nlink is %d", fscki->inum,
+					  "calculated nlink is %d",
+					  (unsigned long)fscki->inum,
 					  fscki->nlink, fscki->references);
 				goto out_dump;
 			}
@@ -1959,20 +1969,21 @@ static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd)
 		if (fscki->xattr_sz != fscki->calc_xsz) {
 			ubifs_err("inode %lu has xattr size %u, but "
 				  "calculated size is %lld",
-				  fscki->inum, fscki->xattr_sz,
+				  (unsigned long)fscki->inum, fscki->xattr_sz,
 				  fscki->calc_xsz);
 			goto out_dump;
 		}
 		if (fscki->xattr_cnt != fscki->calc_xcnt) {
 			ubifs_err("inode %lu has %u xattrs, but "
-				  "calculated count is %lld", fscki->inum,
+				  "calculated count is %lld",
+				  (unsigned long)fscki->inum,
 				  fscki->xattr_cnt, fscki->calc_xcnt);
 			goto out_dump;
 		}
 		if (fscki->xattr_nms != fscki->calc_xnms) {
 			ubifs_err("inode %lu has xattr names' size %u, but "
 				  "calculated names' size is %lld",
-				  fscki->inum, fscki->xattr_nms,
+				  (unsigned long)fscki->inum, fscki->xattr_nms,
 				  fscki->calc_xnms);
 			goto out_dump;
 		}
@@ -1985,11 +1996,12 @@ out_dump:
 	ino_key_init(c, &key, fscki->inum);
 	err = ubifs_lookup_level0(c, &key, &znode, &n);
 	if (!err) {
-		ubifs_err("inode %lu not found in index", fscki->inum);
+		ubifs_err("inode %lu not found in index",
+			  (unsigned long)fscki->inum);
 		return -ENOENT;
 	} else if (err < 0) {
 		ubifs_err("error %d while looking up inode %lu",
-			  err, fscki->inum);
+			  err, (unsigned long)fscki->inum);
 		return err;
 	}
 
@@ -2007,7 +2019,7 @@ out_dump:
 	}
 
 	ubifs_msg("dump of the inode %lu sitting in LEB %d:%d",
-		  fscki->inum, zbr->lnum, zbr->offs);
+		  (unsigned long)fscki->inum, zbr->lnum, zbr->offs);
 	dbg_dump_node(c, ino);
 	kfree(ino);
 	return -EINVAL;
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 856189014a3a..f448ab1f9c38 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -161,7 +161,7 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
 			return ERR_PTR(-EINVAL);
 		}
 		ubifs_warn("running out of inode numbers (current %lu, max %d)",
-			   c->highest_inum, INUM_WATERMARK);
+			   (unsigned long)c->highest_inum, INUM_WATERMARK);
 	}
 
 	inode->i_ino = ++c->highest_inum;
@@ -428,7 +428,8 @@ static int ubifs_readdir(struct file *file, void *dirent, filldir_t filldir)
 		dbg_gen("feed '%s', ino %llu, new f_pos %#x",
 			dent->name, (unsigned long long)le64_to_cpu(dent->inum),
 			key_hash_flash(c, &dent->key));
-		ubifs_assert(dent->ch.sqnum > ubifs_inode(dir)->creat_sqnum);
+		ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
+			     ubifs_inode(dir)->creat_sqnum);
 
 		nm.len = le16_to_cpu(dent->nlen);
 		over = filldir(dirent, dent->name, nm.len, file->f_pos,
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 51cf511d44d9..2624411d9758 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -72,7 +72,7 @@ static int read_block(struct inode *inode, void *addr, unsigned int block,
 		return err;
 	}
 
-	ubifs_assert(dn->ch.sqnum > ubifs_inode(inode)->creat_sqnum);
+	ubifs_assert(le64_to_cpu(dn->ch.sqnum) > ubifs_inode(inode)->creat_sqnum);
 
 	len = le32_to_cpu(dn->size);
 	if (len <= 0 || len > UBIFS_BLOCK_SIZE)
@@ -626,7 +626,7 @@ static int populate_page(struct ubifs_info *c, struct page *page,
 
 			dn = bu->buf + (bu->zbranch[nn].offs - offs);
 
-			ubifs_assert(dn->ch.sqnum >
+			ubifs_assert(le64_to_cpu(dn->ch.sqnum) >
 				     ubifs_inode(inode)->creat_sqnum);
 
 			len = le32_to_cpu(dn->size);
@@ -691,32 +691,22 @@ out_err:
 /**
  * ubifs_do_bulk_read - do bulk-read.
  * @c: UBIFS file-system description object
- * @page1: first page
+ * @bu: bulk-read information
+ * @page1: first page to read
  *
  * This function returns %1 if the bulk-read is done, otherwise %0 is returned.
  */
-static int ubifs_do_bulk_read(struct ubifs_info *c, struct page *page1)
+static int ubifs_do_bulk_read(struct ubifs_info *c, struct bu_info *bu,
+			      struct page *page1)
 {
 	pgoff_t offset = page1->index, end_index;
 	struct address_space *mapping = page1->mapping;
 	struct inode *inode = mapping->host;
 	struct ubifs_inode *ui = ubifs_inode(inode);
-	struct bu_info *bu;
 	int err, page_idx, page_cnt, ret = 0, n = 0;
+	int allocate = bu->buf ? 0 : 1;
 	loff_t isize;
 
-	bu = kmalloc(sizeof(struct bu_info), GFP_NOFS);
-	if (!bu)
-		return 0;
-
-	bu->buf_len = c->bulk_read_buf_size;
-	bu->buf = kmalloc(bu->buf_len, GFP_NOFS);
-	if (!bu->buf)
-		goto out_free;
-
-	data_key_init(c, &bu->key, inode->i_ino,
-		      offset << UBIFS_BLOCKS_PER_PAGE_SHIFT);
-
 	err = ubifs_tnc_get_bu_keys(c, bu);
 	if (err)
 		goto out_warn;
@@ -735,12 +725,25 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct page *page1)
 		 * together. If all the pages were like this, bulk-read would
 		 * reduce performance, so we turn it off for a while.
 		 */
-		ui->read_in_a_row = 0;
-		ui->bulk_read = 0;
-		goto out_free;
+		goto out_bu_off;
 	}
 
 	if (bu->cnt) {
+		if (allocate) {
+			/*
+			 * Allocate bulk-read buffer depending on how many data
+			 * nodes we are going to read.
+			 */
+			bu->buf_len = bu->zbranch[bu->cnt - 1].offs +
+				      bu->zbranch[bu->cnt - 1].len -
+				      bu->zbranch[0].offs;
+			ubifs_assert(bu->buf_len > 0);
+			ubifs_assert(bu->buf_len <= c->leb_size);
+			bu->buf = kmalloc(bu->buf_len, GFP_NOFS | __GFP_NOWARN);
+			if (!bu->buf)
+				goto out_bu_off;
+		}
+
 		err = ubifs_tnc_bulk_read(c, bu);
 		if (err)
 			goto out_warn;
@@ -779,13 +782,17 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct page *page1)
 	ui->last_page_read = offset + page_idx - 1;
 
 out_free:
-	kfree(bu->buf);
-	kfree(bu);
+	if (allocate)
+		kfree(bu->buf);
 	return ret;
 
 out_warn:
 	ubifs_warn("ignoring error %d and skipping bulk-read", err);
 	goto out_free;
+
+out_bu_off:
+	ui->read_in_a_row = ui->bulk_read = 0;
+	goto out_free;
 }
 
 /**
@@ -803,18 +810,20 @@ static int ubifs_bulk_read(struct page *page)
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
 	struct ubifs_inode *ui = ubifs_inode(inode);
 	pgoff_t index = page->index, last_page_read = ui->last_page_read;
-	int ret = 0;
+	struct bu_info *bu;
+	int err = 0, allocated = 0;
 
 	ui->last_page_read = index;
-
 	if (!c->bulk_read)
 		return 0;
+
 	/*
-	 * Bulk-read is protected by ui_mutex, but it is an optimization, so
-	 * don't bother if we cannot lock the mutex.
+	 * Bulk-read is protected by @ui->ui_mutex, but it is an optimization,
+	 * so don't bother if we cannot lock the mutex.
 	 */
 	if (!mutex_trylock(&ui->ui_mutex))
 		return 0;
+
 	if (index != last_page_read + 1) {
 		/* Turn off bulk-read if we stop reading sequentially */
 		ui->read_in_a_row = 1;
@@ -822,6 +831,7 @@ static int ubifs_bulk_read(struct page *page)
 			ui->bulk_read = 0;
 		goto out_unlock;
 	}
+
 	if (!ui->bulk_read) {
 		ui->read_in_a_row += 1;
 		if (ui->read_in_a_row < 3)
@@ -829,10 +839,35 @@ static int ubifs_bulk_read(struct page *page)
 		/* Three reads in a row, so switch on bulk-read */
 		ui->bulk_read = 1;
 	}
-	ret = ubifs_do_bulk_read(c, page);
+
+	/*
+	 * If possible, try to use pre-allocated bulk-read information, which
+	 * is protected by @c->bu_mutex.
+	 */
+	if (mutex_trylock(&c->bu_mutex))
+		bu = &c->bu;
+	else {
+		bu = kmalloc(sizeof(struct bu_info), GFP_NOFS | __GFP_NOWARN);
+		if (!bu)
+			goto out_unlock;
+
+		bu->buf = NULL;
+		allocated = 1;
+	}
+
+	bu->buf_len = c->max_bu_buf_len;
+	data_key_init(c, &bu->key, inode->i_ino,
+		      page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT);
+	err = ubifs_do_bulk_read(c, bu, page);
+
+	if (!allocated)
+		mutex_unlock(&c->bu_mutex);
+	else
+		kfree(bu);
+
 out_unlock:
 	mutex_unlock(&ui->ui_mutex);
-	return ret;
+	return err;
 }
 
 static int ubifs_readpage(struct file *file, struct page *page)
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 22993f867d19..f91b745908ea 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -690,8 +690,9 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
 	int dlen = UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR;
 	struct ubifs_inode *ui = ubifs_inode(inode);
 
-	dbg_jnl("ino %lu, blk %u, len %d, key %s", key_inum(c, key),
-		key_block(c, key), len, DBGKEY(key));
+	dbg_jnl("ino %lu, blk %u, len %d, key %s",
+		(unsigned long)key_inum(c, key), key_block(c, key), len,
+		DBGKEY(key));
 	ubifs_assert(len <= UBIFS_BLOCK_SIZE);
 
 	data = kmalloc(dlen, GFP_NOFS);
@@ -1128,7 +1129,8 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
 	ino_t inum = inode->i_ino;
 	unsigned int blk;
 
-	dbg_jnl("ino %lu, size %lld -> %lld", inum, old_size, new_size);
+	dbg_jnl("ino %lu, size %lld -> %lld",
+		(unsigned long)inum, old_size, new_size);
 	ubifs_assert(!ui->data_len);
 	ubifs_assert(S_ISREG(inode->i_mode));
 	ubifs_assert(mutex_is_locked(&ui->ui_mutex));
diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h
index 9ee65086f627..3f1f16bc25c9 100644
--- a/fs/ubifs/key.h
+++ b/fs/ubifs/key.h
@@ -345,7 +345,7 @@ static inline int key_type_flash(const struct ubifs_info *c, const void *k)
 {
 	const union ubifs_key *key = k;
 
-	return le32_to_cpu(key->u32[1]) >> UBIFS_S_KEY_BLOCK_BITS;
+	return le32_to_cpu(key->j32[1]) >> UBIFS_S_KEY_BLOCK_BITS;
 }
 
 /**
@@ -416,7 +416,7 @@ static inline unsigned int key_block_flash(const struct ubifs_info *c,
 {
 	const union ubifs_key *key = k;
 
-	return le32_to_cpu(key->u32[1]) & UBIFS_S_KEY_BLOCK_MASK;
+	return le32_to_cpu(key->j32[1]) & UBIFS_S_KEY_BLOCK_MASK;
 }
 
 /**
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index eed5a0025d63..a41434b42785 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -571,8 +571,6 @@ static struct ubifs_pnode *next_pnode(struct ubifs_info *c,
 		/* We assume here that LEB zero is never an LPT LEB */
 		if (nnode->nbranch[iip].lnum)
 			return ubifs_get_pnode(c, nnode, iip);
-		else
-			return NULL;
 	}
 
 	/* Go up while can't go right */
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 02d3462f4d3e..9bd5a43d4526 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -105,7 +105,7 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
 	list_add_tail(&orphan->list, &c->orph_list);
 	list_add_tail(&orphan->new_list, &c->orph_new);
 	spin_unlock(&c->orphan_lock);
-	dbg_gen("ino %lu", inum);
+	dbg_gen("ino %lu", (unsigned long)inum);
 	return 0;
 }
 
@@ -132,14 +132,16 @@ void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
 		else {
 			if (o->dnext) {
 				spin_unlock(&c->orphan_lock);
-				dbg_gen("deleted twice ino %lu", inum);
+				dbg_gen("deleted twice ino %lu",
+					(unsigned long)inum);
 				return;
 			}
 			if (o->cnext) {
 				o->dnext = c->orph_dnext;
 				c->orph_dnext = o;
 				spin_unlock(&c->orphan_lock);
-				dbg_gen("delete later ino %lu", inum);
+				dbg_gen("delete later ino %lu",
+					(unsigned long)inum);
 				return;
 			}
 			rb_erase(p, &c->orph_tree);
@@ -151,12 +153,12 @@ void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
 			}
 			spin_unlock(&c->orphan_lock);
 			kfree(o);
-			dbg_gen("inum %lu", inum);
+			dbg_gen("inum %lu", (unsigned long)inum);
 			return;
 		}
 	}
 	spin_unlock(&c->orphan_lock);
-	dbg_err("missing orphan ino %lu", inum);
+	dbg_err("missing orphan ino %lu", (unsigned long)inum);
 	dbg_dump_stack();
 }
 
@@ -448,7 +450,7 @@ static void erase_deleted(struct ubifs_info *c)
 		rb_erase(&orphan->rb, &c->orph_tree);
 		list_del(&orphan->list);
 		c->tot_orphans -= 1;
-		dbg_gen("deleting orphan ino %lu", orphan->inum);
+		dbg_gen("deleting orphan ino %lu", (unsigned long)orphan->inum);
 		kfree(orphan);
 	}
 	c->orph_dnext = NULL;
@@ -536,8 +538,8 @@ static int insert_dead_orphan(struct ubifs_info *c, ino_t inum)
 	list_add_tail(&orphan->list, &c->orph_list);
 	orphan->dnext = c->orph_dnext;
 	c->orph_dnext = orphan;
-	dbg_mnt("ino %lu, new %d, tot %d",
-		inum, c->new_orphans, c->tot_orphans);
+	dbg_mnt("ino %lu, new %d, tot %d", (unsigned long)inum,
+		c->new_orphans, c->tot_orphans);
 	return 0;
 }
 
@@ -609,7 +611,8 @@ static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 		n = (le32_to_cpu(orph->ch.len) - UBIFS_ORPH_NODE_SZ) >> 3;
 		for (i = 0; i < n; i++) {
 			inum = le64_to_cpu(orph->inos[i]);
-			dbg_rcvry("deleting orphaned inode %lu", inum);
+			dbg_rcvry("deleting orphaned inode %lu",
+				  (unsigned long)inum);
 			err = ubifs_tnc_remove_ino(c, inum);
 			if (err)
 				return err;
@@ -840,8 +843,8 @@ static int dbg_orphan_check(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 	if (inum != ci->last_ino) {
 		/* Lowest node type is the inode node, so it comes first */
 		if (key_type(c, &zbr->key) != UBIFS_INO_KEY)
-			ubifs_err("found orphan node ino %lu, type %d", inum,
-				  key_type(c, &zbr->key));
+			ubifs_err("found orphan node ino %lu, type %d",
+				  (unsigned long)inum, key_type(c, &zbr->key));
 		ci->last_ino = inum;
 		ci->tot_inos += 1;
 		err = ubifs_tnc_read_node(c, zbr, ci->node);
@@ -853,7 +856,8 @@ static int dbg_orphan_check(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 			/* Must be recorded as an orphan */
 			if (!dbg_find_check_orphan(&ci->root, inum) &&
 			    !dbg_find_orphan(c, inum)) {
-				ubifs_err("missing orphan, ino %lu", inum);
+				ubifs_err("missing orphan, ino %lu",
+					  (unsigned long)inum);
 				ci->missing += 1;
 			}
 	}
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 77d26c141cf6..90acac603e63 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -168,12 +168,12 @@ static int write_rcvrd_mst_node(struct ubifs_info *c,
 				struct ubifs_mst_node *mst)
 {
 	int err = 0, lnum = UBIFS_MST_LNUM, sz = c->mst_node_alsz;
-	uint32_t save_flags;
+	__le32 save_flags;
 
 	dbg_rcvry("recovery");
 
 	save_flags = mst->flags;
-	mst->flags = cpu_to_le32(le32_to_cpu(mst->flags) | UBIFS_MST_RCVRY);
+	mst->flags |= cpu_to_le32(UBIFS_MST_RCVRY);
 
 	ubifs_prepare_node(c, mst, UBIFS_MST_NODE_SZ, 1);
 	err = ubi_leb_change(c->ubi, lnum, mst, sz, UBI_SHORTTERM);
@@ -1435,13 +1435,13 @@ static int fix_size_in_place(struct ubifs_info *c, struct size_entry *e)
 	err = ubi_leb_change(c->ubi, lnum, c->sbuf, len, UBI_UNKNOWN);
 	if (err)
 		goto out;
-	dbg_rcvry("inode %lu at %d:%d size %lld -> %lld ", e->inum, lnum, offs,
-		  i_size, e->d_size);
+	dbg_rcvry("inode %lu at %d:%d size %lld -> %lld ",
+		  (unsigned long)e->inum, lnum, offs, i_size, e->d_size);
 	return 0;
 
 out:
 	ubifs_warn("inode %lu failed to fix size %lld -> %lld error %d",
-		   e->inum, e->i_size, e->d_size, err);
+		   (unsigned long)e->inum, e->i_size, e->d_size, err);
 	return err;
 }
 
@@ -1472,7 +1472,8 @@ int ubifs_recover_size(struct ubifs_info *c)
 				return err;
 			if (err == -ENOENT) {
 				/* Remove data nodes that have no inode */
-				dbg_rcvry("removing ino %lu", e->inum);
+				dbg_rcvry("removing ino %lu",
+					  (unsigned long)e->inum);
 				err = ubifs_tnc_remove_ino(c, e->inum);
 				if (err)
 					return err;
@@ -1493,8 +1494,8 @@ int ubifs_recover_size(struct ubifs_info *c)
 					return PTR_ERR(inode);
 				if (inode->i_size < e->d_size) {
 					dbg_rcvry("ino %lu size %lld -> %lld",
-						  e->inum, e->d_size,
-						  inode->i_size);
+						  (unsigned long)e->inum,
+						  e->d_size, inode->i_size);
 					inode->i_size = e->d_size;
 					ubifs_inode(inode)->ui_size = e->d_size;
 					e->inode = inode;
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 7399692af859..21f7d047c306 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -1065,7 +1065,7 @@ int ubifs_replay_journal(struct ubifs_info *c)
 	ubifs_assert(c->bud_bytes <= c->max_bud_bytes || c->need_recovery);
 	dbg_mnt("finished, log head LEB %d:%d, max_sqnum %llu, "
 		"highest_inum %lu", c->lhead_lnum, c->lhead_offs, c->max_sqnum,
-		c->highest_inum);
+		(unsigned long)c->highest_inum);
 out:
 	destroy_replay_tree(c);
 	destroy_bud_list(c);
diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
index 2bf753b38889..0f392351dc5a 100644
--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -81,6 +81,7 @@ static int create_default_filesystem(struct ubifs_info *c)
 	int lpt_lebs, lpt_first, orph_lebs, big_lpt, ino_waste, sup_flags = 0;
 	int min_leb_cnt = UBIFS_MIN_LEB_CNT;
 	uint64_t tmp64, main_bytes;
+	__le64 tmp_le64;
 
 	/* Some functions called from here depend on the @c->key_len filed */
 	c->key_len = UBIFS_SK_LEN;
@@ -295,10 +296,10 @@ static int create_default_filesystem(struct ubifs_info *c)
 	ino->ch.node_type = UBIFS_INO_NODE;
 	ino->creat_sqnum = cpu_to_le64(++c->max_sqnum);
 	ino->nlink = cpu_to_le32(2);
-	tmp = cpu_to_le64(CURRENT_TIME_SEC.tv_sec);
-	ino->atime_sec   = tmp;
-	ino->ctime_sec   = tmp;
-	ino->mtime_sec   = tmp;
+	tmp_le64 = cpu_to_le64(CURRENT_TIME_SEC.tv_sec);
+	ino->atime_sec   = tmp_le64;
+	ino->ctime_sec   = tmp_le64;
+	ino->mtime_sec   = tmp_le64;
 	ino->atime_nsec  = 0;
 	ino->ctime_nsec  = 0;
 	ino->mtime_nsec  = 0;
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 8780efbf40ac..d80b2aef42b6 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -36,6 +36,12 @@
 #include <linux/mount.h>
 #include "ubifs.h"
 
+/*
+ * Maximum amount of memory we may 'kmalloc()' without worrying that we are
+ * allocating too much.
+ */
+#define UBIFS_KMALLOC_OK (128*1024)
+
 /* Slab cache for UBIFS inodes */
 struct kmem_cache *ubifs_inode_slab;
 
@@ -561,18 +567,11 @@ static int init_constants_early(struct ubifs_info *c)
 	 * calculations when reporting free space.
 	 */
 	c->leb_overhead = c->leb_size % UBIFS_MAX_DATA_NODE_SZ;
-	/* Buffer size for bulk-reads */
-	c->bulk_read_buf_size = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ;
-	if (c->bulk_read_buf_size > c->leb_size)
-		c->bulk_read_buf_size = c->leb_size;
-	if (c->bulk_read_buf_size > 128 * 1024) {
-		/* Check if we can kmalloc more than 128KiB */
-		void *try = kmalloc(c->bulk_read_buf_size, GFP_KERNEL);
 
-		kfree(try);
-		if (!try)
-			c->bulk_read_buf_size = 128 * 1024;
-	}
+	/* Buffer size for bulk-reads */
+	c->max_bu_buf_len = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ;
+	if (c->max_bu_buf_len > c->leb_size)
+		c->max_bu_buf_len = c->leb_size;
 	return 0;
 }
 
@@ -992,6 +991,34 @@ static void destroy_journal(struct ubifs_info *c)
 }
 
 /**
+ * bu_init - initialize bulk-read information.
+ * @c: UBIFS file-system description object
+ */
+static void bu_init(struct ubifs_info *c)
+{
+	ubifs_assert(c->bulk_read == 1);
+
+	if (c->bu.buf)
+		return; /* Already initialized */
+
+again:
+	c->bu.buf = kmalloc(c->max_bu_buf_len, GFP_KERNEL | __GFP_NOWARN);
+	if (!c->bu.buf) {
+		if (c->max_bu_buf_len > UBIFS_KMALLOC_OK) {
+			c->max_bu_buf_len = UBIFS_KMALLOC_OK;
+			goto again;
+		}
+
+		/* Just disable bulk-read */
+		ubifs_warn("Cannot allocate %d bytes of memory for bulk-read, "
+			   "disabling it", c->max_bu_buf_len);
+		c->mount_opts.bulk_read = 1;
+		c->bulk_read = 0;
+		return;
+	}
+}
+
+/**
  * mount_ubifs - mount UBIFS file-system.
  * @c: UBIFS file-system description object
  *
@@ -1059,6 +1086,13 @@ static int mount_ubifs(struct ubifs_info *c)
 			goto out_free;
 	}
 
+	if (c->bulk_read == 1)
+		bu_init(c);
+
+	/*
+	 * We have to check all CRCs, even for data nodes, when we mount the FS
+	 * (specifically, when we are replaying).
+	 */
 	c->always_chk_crc = 1;
 
 	err = ubifs_read_superblock(c);
@@ -1289,6 +1323,7 @@ out_cbuf:
 out_dereg:
 	dbg_failure_mode_deregistration(c);
 out_free:
+	kfree(c->bu.buf);
 	vfree(c->ileb_buf);
 	vfree(c->sbuf);
 	kfree(c->bottom_up_buf);
@@ -1325,10 +1360,11 @@ static void ubifs_umount(struct ubifs_info *c)
 	kfree(c->cbuf);
 	kfree(c->rcvrd_mst_node);
 	kfree(c->mst_node);
+	kfree(c->bu.buf);
+	vfree(c->ileb_buf);
 	vfree(c->sbuf);
 	kfree(c->bottom_up_buf);
 	UBIFS_DBG(vfree(c->dbg_buf));
-	vfree(c->ileb_buf);
 	dbg_failure_mode_deregistration(c);
 }
 
@@ -1626,6 +1662,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
 		ubifs_err("invalid or unknown remount parameter");
 		return err;
 	}
+
 	if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
 		err = ubifs_remount_rw(c);
 		if (err)
@@ -1633,6 +1670,14 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
 	} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
 		ubifs_remount_ro(c);
 
+	if (c->bulk_read == 1)
+		bu_init(c);
+	else {
+		dbg_gen("disable bulk-read");
+		kfree(c->bu.buf);
+		c->bu.buf = NULL;
+	}
+
 	return 0;
 }
 
@@ -1723,6 +1768,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
 	mutex_init(&c->log_mutex);
 	mutex_init(&c->mst_mutex);
 	mutex_init(&c->umount_mutex);
+	mutex_init(&c->bu_mutex);
 	init_waitqueue_head(&c->cmt_wq);
 	c->buds = RB_ROOT;
 	c->old_idx = RB_ROOT;
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index d27fd918b9c9..6eef5344a145 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -1501,7 +1501,12 @@ out:
  * @bu: bulk-read parameters and results
  *
  * Lookup consecutive data node keys for the same inode that reside
- * consecutively in the same LEB.
+ * consecutively in the same LEB. This function returns zero in case of success
+ * and a negative error code in case of failure.
+ *
+ * Note, if the bulk-read buffer length (@bu->buf_len) is known, this function
+ * makes sure bulk-read nodes fit the buffer. Otherwise, this function prepares
+ * maxumum possible amount of nodes for bulk-read.
  */
 int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu)
 {
@@ -2677,7 +2682,7 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum)
 	struct ubifs_dent_node *xent, *pxent = NULL;
 	struct qstr nm = { .name = NULL };
 
-	dbg_tnc("ino %lu", inum);
+	dbg_tnc("ino %lu", (unsigned long)inum);
 
 	/*
 	 * Walk all extended attribute entries and remove them together with
@@ -2697,7 +2702,8 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum)
 		}
 
 		xattr_inum = le64_to_cpu(xent->inum);
-		dbg_tnc("xent '%s', ino %lu", xent->name, xattr_inum);
+		dbg_tnc("xent '%s', ino %lu", xent->name,
+			(unsigned long)xattr_inum);
 
 		nm.name = xent->name;
 		nm.len = le16_to_cpu(xent->nlen);
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index a7bd32fa15b9..46b172560a06 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -753,7 +753,7 @@ struct ubifs_znode {
 };
 
 /**
- * struct bu_info - bulk-read information
+ * struct bu_info - bulk-read information.
  * @key: first data node key
  * @zbranch: zbranches of data nodes to bulk read
  * @buf: buffer to read into
@@ -969,7 +969,10 @@ struct ubifs_mount_opts {
  * @mst_node: master node
  * @mst_offs: offset of valid master node
  * @mst_mutex: protects the master node area, @mst_node, and @mst_offs
- * @bulk_read_buf_size: buffer size for bulk-reads
+ *
+ * @max_bu_buf_len: maximum bulk-read buffer length
+ * @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu
+ * @bu: pre-allocated bulk-read information
  *
  * @log_lebs: number of logical eraseblocks in the log
  * @log_bytes: log size in bytes
@@ -1217,7 +1220,10 @@ struct ubifs_info {
 	struct ubifs_mst_node *mst_node;
 	int mst_offs;
 	struct mutex mst_mutex;
-	int bulk_read_buf_size;
+
+	int max_bu_buf_len;
+	struct mutex bu_mutex;
+	struct bu_info bu;
 
 	int log_lebs;
 	long long log_bytes;