diff --git a/storage/innobase/btr/btr0cur.c b/storage/innobase/btr/btr0cur.c
index 4a5a247b022..3021bb71929 100644
--- a/storage/innobase/btr/btr0cur.c
+++ b/storage/innobase/btr/btr0cur.c
@@ -1845,6 +1845,7 @@ btr_cur_update_in_place(
 	roll_ptr_t	roll_ptr	= 0;
 	trx_t*		trx;
 	ulint		was_delete_marked;
+	ibool		is_hashed;
 	mem_heap_t*	heap		= NULL;
 	ulint		offsets_[REC_OFFS_NORMAL_SIZE];
 	ulint*		offsets		= offsets_;
@@ -1886,7 +1887,21 @@ btr_cur_update_in_place(
 		return(err);
 	}
 
-	if (block->is_hashed) {
+	if (!(flags & BTR_KEEP_SYS_FLAG)) {
+		row_upd_rec_sys_fields(rec, NULL,
+				       index, offsets, trx, roll_ptr);
+	}
+
+	was_delete_marked = rec_get_deleted_flag(
+		rec, page_is_comp(buf_block_get_frame(block)));
+
+	is_hashed = block->is_hashed;
+
+	if (is_hashed) {
+		/* TO DO: Can we skip this if none of the fields
+		index->search_info->curr_n_fields
+		are being updated? */
+
 		/* The function row_upd_changes_ord_field_binary works only
 		if the update vector was built for a clustered index, we must
 		NOT call it if index is secondary */
@@ -1902,17 +1917,9 @@ btr_cur_update_in_place(
 		rw_lock_x_lock(&btr_search_latch);
 	}
 
-	if (!(flags & BTR_KEEP_SYS_FLAG)) {
-		row_upd_rec_sys_fields(rec, NULL,
-				       index, offsets, trx, roll_ptr);
-	}
-
-	was_delete_marked = rec_get_deleted_flag(
-		rec, page_is_comp(buf_block_get_frame(block)));
-
 	row_upd_rec_in_place(rec, index, offsets, update, page_zip);
 
-	if (block->is_hashed) {
+	if (is_hashed) {
 		rw_lock_x_unlock(&btr_search_latch);
 	}
 
@@ -2638,7 +2645,8 @@ btr_cur_parse_del_mark_set_clust_rec(
 
 		/* We do not need to reserve btr_search_latch, as the page
 		is only being recovered, and there cannot be a hash index to
-		it. */
+		it. Besides, these fields are being updated in place
+		and the adaptive hash index does not depend on them. */
 
 		btr_rec_set_deleted_flag(rec, page_zip, val);
 
@@ -2718,9 +2726,9 @@ btr_cur_del_mark_set_clust_rec(
 		return(err);
 	}
 
-	if (block->is_hashed) {
-		rw_lock_x_lock(&btr_search_latch);
-	}
+	/* The btr_search_latch is not needed here, because
+	the adaptive hash index does not depend on the delete-mark
+	and the delete-mark is being updated in place. */
 
 	page_zip = buf_block_get_page_zip(block);
 
@@ -2734,10 +2742,6 @@ btr_cur_del_mark_set_clust_rec(
 				       index, offsets, trx, roll_ptr);
 	}
 
-	if (block->is_hashed) {
-		rw_lock_x_unlock(&btr_search_latch);
-	}
-
 	btr_cur_del_mark_set_clust_rec_log(flags, rec, index, val, trx,
 					   roll_ptr, mtr);
 
@@ -2813,7 +2817,8 @@ btr_cur_parse_del_mark_set_sec_rec(
 
 		/* We do not need to reserve btr_search_latch, as the page
 		is only being recovered, and there cannot be a hash index to
-		it. */
+		it. Besides, the delete-mark flag is being updated in place
+		and the adaptive hash index does not depend on it. */
 
 		btr_rec_set_deleted_flag(rec, page_zip, val);
 	}
@@ -2861,16 +2866,11 @@ btr_cur_del_mark_set_sec_rec(
 	ut_ad(!!page_rec_is_comp(rec)
 	      == dict_table_is_comp(cursor->index->table));
 
-	if (block->is_hashed) {
-		rw_lock_x_lock(&btr_search_latch);
-	}
-
+	/* We do not need to reserve btr_search_latch, as the
+	delete-mark flag is being updated in place and the adaptive
+	hash index does not depend on it. */
 	btr_rec_set_deleted_flag(rec, buf_block_get_page_zip(block), val);
 
-	if (block->is_hashed) {
-		rw_lock_x_unlock(&btr_search_latch);
-	}
-
 	btr_cur_del_mark_set_sec_rec_log(rec, val, mtr);
 
 	return(DB_SUCCESS);
@@ -2891,8 +2891,11 @@ btr_cur_set_deleted_flag_for_ibuf(
 	ibool		val,		/*!< in: value to set */
 	mtr_t*		mtr)		/*!< in: mtr */
 {
-	/* We do not need to reserve btr_search_latch, as the page has just
-	been read to the buffer pool and there cannot be a hash index to it. */
+	/* We do not need to reserve btr_search_latch, as the page
+	has just been read to the buffer pool and there cannot be
+	a hash index to it.  Besides, the delete-mark flag is being
+	updated in place and the adaptive hash index does not depend
+	on it. */
 
 	btr_rec_set_deleted_flag(rec, page_zip, val);
 
diff --git a/storage/innobase/buf/buf0buf.c b/storage/innobase/buf/buf0buf.c
index 09b7820ae41..e0b9e979970 100644
--- a/storage/innobase/buf/buf0buf.c
+++ b/storage/innobase/buf/buf0buf.c
@@ -2990,19 +2990,20 @@ buf_page_init_low(
 
 /********************************************************************//**
 Inits a page to the buffer buf_pool. */
-static
+static __attribute__((nonnull))
 void
 buf_page_init(
 /*==========*/
+	buf_pool_t*	buf_pool,/*!< in/out: buffer pool */
 	ulint		space,	/*!< in: space id */
 	ulint		offset,	/*!< in: offset of the page within space
 				in units of a page */
 	ulint		fold,	/*!< in: buf_page_address_fold(space,offset) */
-	buf_block_t*	block)	/*!< in: block to init */
+	buf_block_t*	block)	/*!< in/out: block to init */
 {
 	buf_page_t*	hash_page;
-	buf_pool_t*	buf_pool = buf_pool_get(space, offset);
 
+	ut_ad(buf_pool == buf_pool_get(space, offset));
 	ut_ad(buf_pool_mutex_own(buf_pool));
 	ut_ad(mutex_own(&(block->mutex)));
 	ut_a(buf_block_get_state(block) != BUF_BLOCK_FILE_PAGE);
@@ -3161,7 +3162,7 @@ err_exit:
 
 		ut_ad(buf_pool_from_bpage(bpage) == buf_pool);
 
-		buf_page_init(space, offset, fold, block);
+		buf_page_init(buf_pool, space, offset, fold, block);
 
 		/* The block must be put to the LRU list, to the old blocks */
 		buf_LRU_add_block(bpage, TRUE/* to old blocks */);
@@ -3365,7 +3366,7 @@ buf_page_create(
 
 	mutex_enter(&block->mutex);
 
-	buf_page_init(space, offset, fold, block);
+	buf_page_init(buf_pool, space, offset, fold, block);
 
 	/* The block must be put to the LRU list */
 	buf_LRU_add_block(&block->page, FALSE);
diff --git a/storage/innobase/ibuf/ibuf0ibuf.c b/storage/innobase/ibuf/ibuf0ibuf.c
index 718f2082ce9..054a2d364b6 100644
--- a/storage/innobase/ibuf/ibuf0ibuf.c
+++ b/storage/innobase/ibuf/ibuf0ibuf.c
@@ -2210,15 +2210,15 @@ ibuf_add_free_page(void)
 		buf_block_t*	block = buf_page_get(
 			IBUF_SPACE_ID, 0, page_no, RW_X_LATCH, &mtr);
 
+		ibuf_enter(&mtr);
+
+		mutex_enter(&ibuf_mutex);
+
 		buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE_NEW);
 
 		page = buf_block_get_frame(block);
 	}
 
-	ibuf_enter(&mtr);
-
-	mutex_enter(&ibuf_mutex);
-
 	root = ibuf_tree_root_get(&mtr);
 
 	/* Add the page to the free list and update the ibuf size data */
diff --git a/storage/innobase/include/page0page.h b/storage/innobase/include/page0page.h
index 346f65302f7..ad1445b3935 100644
--- a/storage/innobase/include/page0page.h
+++ b/storage/innobase/include/page0page.h
@@ -68,10 +68,7 @@ typedef	byte		page_header_t;
 #define PAGE_MAX_TRX_ID	 18	/* highest id of a trx which may have modified
 				a record on the page; trx_id_t; defined only
 				in secondary indexes and in the insert buffer
-				tree; NOTE: this may be modified only
-				when the thread has an x-latch to the page,
-				and ALSO an x-latch to btr_search_latch
-				if there is a hash index to the page! */
+				tree */
 #define PAGE_HEADER_PRIV_END 26	/* end of private data structure of the page
 				header which are set in a page create */
 /*----*/
diff --git a/storage/innobase/include/row0upd.ic b/storage/innobase/include/row0upd.ic
index 0894ed373b0..11db82f64da 100644
--- a/storage/innobase/include/row0upd.ic
+++ b/storage/innobase/include/row0upd.ic
@@ -157,11 +157,6 @@ row_upd_rec_sys_fields(
 {
 	ut_ad(dict_index_is_clust(index));
 	ut_ad(rec_offs_validate(rec, index, offsets));
-#ifdef UNIV_SYNC_DEBUG
-	if (!rw_lock_own(&btr_search_latch, RW_LOCK_EX)) {
-		ut_ad(!buf_block_align(rec)->is_hashed);
-	}
-#endif /* UNIV_SYNC_DEBUG */
 
 	if (UNIV_LIKELY_NULL(page_zip)) {
 		ulint	pos = dict_index_get_sys_col_pos(index, DATA_TRX_ID);