18 files changed, 130 insertions, 249 deletions

diff --git a/storage/innobase/btr/btr0btr.cc b/storage/innobase/btr/btr0btr.cc
index 98f64e8ce5c..9a38b0ebf27 100644
--- a/storage/innobase/btr/btr0btr.cc
+++ b/storage/innobase/btr/btr0btr.cc
@@ -322,26 +322,24 @@ btr_root_fseg_adjust_on_import(
 	fseg_header_t*	seg_header,	/*!< in/out: segment header */
 	page_zip_des_t*	page_zip,	/*!< in/out: compressed page,
 					or NULL */
-	ulint		space,		/*!< in: tablespace identifier */
-	mtr_t*		mtr)		/*!< in/out: mini-transaction */
+	ulint		space)		/*!< in: tablespace identifier */
 {
 	ulint	offset = mach_read_from_2(seg_header + FSEG_HDR_OFFSET);
 
 	if (offset < FIL_PAGE_DATA
 	    || offset > srv_page_size - FIL_PAGE_DATA_END) {
+		return false;
+	}
 
-		return(FALSE);
+	seg_header += FSEG_HDR_SPACE;
 
-	} else if (page_zip) {
-		mach_write_to_4(seg_header + FSEG_HDR_SPACE, space);
-		page_zip_write_header(page_zip, seg_header + FSEG_HDR_SPACE,
-				      4, mtr);
-	} else {
-		mlog_write_ulint(seg_header + FSEG_HDR_SPACE,
-				 space, MLOG_4BYTES, mtr);
+	mach_write_to_4(seg_header, space);
+	if (UNIV_LIKELY_NULL(page_zip)) {
+		memcpy(page_zip->data + page_offset(seg_header), seg_header,
+		       4);
 	}
 
-	return(TRUE);
+	return true;
 }
 
 /**************************************************************//**
@@ -399,10 +397,10 @@ btr_root_adjust_on_import(
 	if (err == DB_SUCCESS
 	    && (!btr_root_fseg_adjust_on_import(
 			FIL_PAGE_DATA + PAGE_BTR_SEG_LEAF
-			+ page, page_zip, table->space_id, &mtr)
+			+ page, page_zip, table->space_id)
 		|| !btr_root_fseg_adjust_on_import(
 			FIL_PAGE_DATA + PAGE_BTR_SEG_TOP
-			+ page, page_zip, table->space_id, &mtr))) {
+			+ page, page_zip, table->space_id))) {
 
 		err = DB_CORRUPTION;
 	}
@@ -2002,13 +2000,7 @@ btr_root_raise_and_insert(
 		page_set_instant(root_block->frame, index->n_core_fields, mtr);
 	}
 
-	/* Set the next node and previous node fields, although
-	they should already have been set.  The previous node field
-	must be FIL_NULL if root_page_zip != NULL, because the
-	REC_INFO_MIN_REC_FLAG (of the first user record) will be
-	set if and only if !page_has_prev(). */
-	btr_page_set_next(root, root_page_zip, FIL_NULL, mtr);
-	btr_page_set_prev(root, root_page_zip, FIL_NULL, mtr);
+	ut_ad(!page_has_siblings(root));
 
 	page_cursor = btr_cur_get_page_cur(cursor);
 
@@ -2510,8 +2502,8 @@ btr_attach_half_pages(
 	}
 
 	/* Get the previous and next pages of page */
-	prev_page_no = btr_page_get_prev(page, mtr);
-	next_page_no = btr_page_get_next(page, mtr);
+	prev_page_no = btr_page_get_prev(page);
+	next_page_no = btr_page_get_next(page);
 
 	const ulint	space = block->page.id.space();
 
@@ -2551,7 +2543,7 @@ btr_attach_half_pages(
 	if (prev_block) {
 #ifdef UNIV_BTR_DEBUG
 		ut_a(page_is_comp(prev_block->frame) == page_is_comp(page));
-		ut_a(btr_page_get_next(prev_block->frame, mtr)
+		ut_a(btr_page_get_next(prev_block->frame)
 		     == block->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 
@@ -2563,7 +2555,7 @@ btr_attach_half_pages(
 	if (next_block) {
 #ifdef UNIV_BTR_DEBUG
 		ut_a(page_is_comp(next_block->frame) == page_is_comp(page));
-		ut_a(btr_page_get_prev(next_block->frame, mtr)
+		ut_a(btr_page_get_prev(next_block->frame)
 		     == page_get_page_no(page));
 #endif /* UNIV_BTR_DEBUG */
 
@@ -2577,7 +2569,7 @@ btr_attach_half_pages(
 		btr_page_set_prev(lower_page, lower_page_zip,
 				  prev_page_no, mtr);
 	} else {
-		ut_ad(btr_page_get_prev(lower_page, mtr) == prev_page_no);
+		ut_ad(btr_page_get_prev(lower_page) == prev_page_no);
 	}
 
 	btr_page_set_next(lower_page, lower_page_zip, upper_page_no, mtr);
@@ -2588,7 +2580,7 @@ btr_attach_half_pages(
 		btr_page_set_next(upper_page, upper_page_zip,
 				  next_page_no, mtr);
 	} else {
-		ut_ad(btr_page_get_next(upper_page, mtr) == next_page_no);
+		ut_ad(btr_page_get_next(upper_page) == next_page_no);
 	}
 }
 
@@ -2649,7 +2641,7 @@ btr_insert_into_right_sibling(
 {
 	buf_block_t*	block = btr_cur_get_block(cursor);
 	page_t*		page = buf_block_get_frame(block);
-	ulint		next_page_no = btr_page_get_next(page, mtr);
+	const uint32_t	next_page_no = btr_page_get_next(page);
 
 	ut_ad(mtr_memo_contains_flagged(
 		      mtr, dict_index_get_lock(cursor->index),
@@ -3180,8 +3172,8 @@ btr_level_list_remove_func(
 	ut_ad(space == page_get_space_id(page));
 	/* Get the previous and next page numbers of page */
 
-	const ulint	prev_page_no = btr_page_get_prev(page, mtr);
-	const ulint	next_page_no = btr_page_get_next(page, mtr);
+	const uint32_t	prev_page_no = btr_page_get_prev(page);
+	const uint32_t	next_page_no = btr_page_get_next(page);
 
 	/* Update page links of the level */
 
@@ -3194,8 +3186,8 @@ btr_level_list_remove_func(
 			= buf_block_get_frame(prev_block);
 #ifdef UNIV_BTR_DEBUG
 		ut_a(page_is_comp(prev_page) == page_is_comp(page));
-		ut_a(btr_page_get_next(prev_page, mtr)
-		     == page_get_page_no(page));
+		ut_a(!memcmp(prev_page + FIL_PAGE_NEXT, page + FIL_PAGE_OFFSET,
+			     4));
 #endif /* UNIV_BTR_DEBUG */
 
 		btr_page_set_next(prev_page,
@@ -3213,8 +3205,8 @@ btr_level_list_remove_func(
 			= buf_block_get_frame(next_block);
 #ifdef UNIV_BTR_DEBUG
 		ut_a(page_is_comp(next_page) == page_is_comp(page));
-		ut_a(btr_page_get_prev(next_page, mtr)
-		     == page_get_page_no(page));
+		ut_a(!memcmp(next_page + FIL_PAGE_PREV, page + FIL_PAGE_OFFSET,
+			     4));
 #endif /* UNIV_BTR_DEBUG */
 
 		btr_page_set_prev(next_page,
@@ -3557,8 +3549,8 @@ btr_compress(
 
 	MONITOR_INC(MONITOR_INDEX_MERGE_ATTEMPTS);
 
-	left_page_no = btr_page_get_prev(page, mtr);
-	right_page_no = btr_page_get_next(page, mtr);
+	left_page_no = btr_page_get_prev(page);
+	right_page_no = btr_page_get_next(page);
 
 #ifdef UNIV_DEBUG
 	if (!page_is_leaf(page) && left_page_no == FIL_NULL) {
@@ -3632,10 +3624,10 @@ retry:
 
 #ifdef UNIV_BTR_DEBUG
 	if (is_left) {
-		ut_a(btr_page_get_next(merge_page, mtr)
+		ut_a(btr_page_get_next(merge_page)
 		     == block->page.id.page_no());
 	} else {
-		ut_a(btr_page_get_prev(merge_page, mtr)
+		ut_a(btr_page_get_prev(merge_page)
 		     == block->page.id.page_no());
 	}
 #endif /* UNIV_BTR_DEBUG */
@@ -4153,8 +4145,8 @@ btr_discard_page(
 
 	/* Decide the page which will inherit the locks */
 
-	left_page_no = btr_page_get_prev(buf_block_get_frame(block), mtr);
-	right_page_no = btr_page_get_next(buf_block_get_frame(block), mtr);
+	left_page_no = btr_page_get_prev(buf_block_get_frame(block));
+	right_page_no = btr_page_get_next(buf_block_get_frame(block));
 
 	const page_size_t	page_size(index->table->space->flags);
 	ut_d(bool parent_is_different = false);
@@ -4165,7 +4157,7 @@ btr_discard_page(
 
 		merge_page = buf_block_get_frame(merge_block);
 #ifdef UNIV_BTR_DEBUG
-		ut_a(btr_page_get_next(merge_page, mtr)
+		ut_a(btr_page_get_next(merge_page)
 		     == block->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 		ut_d(parent_is_different =
@@ -4181,7 +4173,7 @@ btr_discard_page(
 
 		merge_page = buf_block_get_frame(merge_block);
 #ifdef UNIV_BTR_DEBUG
-		ut_a(btr_page_get_prev(merge_page, mtr)
+		ut_a(btr_page_get_prev(merge_page)
 		     == block->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 		ut_d(parent_is_different = page_rec_is_supremum(
@@ -4801,7 +4793,7 @@ btr_validate_level(
 		does not use such scan for any of its DML or query
 		operations  */
 		if (dict_index_is_spatial(index)) {
-			left_page_no = btr_page_get_prev(page, &mtr);
+			left_page_no = btr_page_get_prev(page);
 
 			while (left_page_no != FIL_NULL) {
 				/* To obey latch order of tree blocks,
@@ -4817,7 +4809,7 @@ btr_validate_level(
 					table_page_size,
 					RW_SX_LATCH, index, &mtr);
 				page = buf_block_get_frame(block);
-				left_page_no = btr_page_get_prev(page, &mtr);
+				left_page_no = btr_page_get_prev(page);
 			}
 		}
 	}
@@ -4872,8 +4864,8 @@ loop:
 
 	ut_a(btr_page_get_level(page) == level);
 
-	right_page_no = btr_page_get_next(page, &mtr);
-	left_page_no = btr_page_get_prev(page, &mtr);
+	right_page_no = btr_page_get_next(page);
+	left_page_no = btr_page_get_prev(page);
 
 	ut_a(!page_is_empty(page)
 	     || (level == 0
@@ -4890,9 +4882,7 @@ loop:
 
 		right_page = buf_block_get_frame(right_block);
 
-		if (btr_page_get_prev(right_page, &mtr)
-		    != page_get_page_no(page)) {
-
+		if (btr_page_get_prev(right_page) != page_get_page_no(page)) {
 			btr_validate_report2(index, level, block, right_block);
 			fputs("InnoDB: broken FIL_PAGE_NEXT"
 			      " or FIL_PAGE_PREV links\n", stderr);
@@ -4973,7 +4963,7 @@ loop:
 		node_ptr = btr_cur_get_rec(&node_cur);
 
 		parent_page_no = page_get_page_no(father_page);
-		parent_right_page_no = btr_page_get_next(father_page, &mtr);
+		parent_right_page_no = btr_page_get_next(father_page);
 		rightmost_child = page_rec_is_supremum(
 					page_rec_get_next(node_ptr));
 
@@ -5114,7 +5104,7 @@ loop:
 				}
 
 				if (page_get_page_no(right_father_page)
-				    != btr_page_get_next(father_page, &mtr)) {
+				    != btr_page_get_next(father_page)) {
 
 					ret = false;
 					fputs("InnoDB: node pointer 3 to"
diff --git a/storage/innobase/btr/btr0cur.cc b/storage/innobase/btr/btr0cur.cc
index 2e2f536afb2..d904e92935c 100644
--- a/storage/innobase/btr/btr0cur.cc
+++ b/storage/innobase/btr/btr0cur.cc
@@ -269,7 +269,7 @@ btr_cur_latch_leaves(
 			      dict_index_get_lock(cursor->index),
 			      MTR_MEMO_X_LOCK | MTR_MEMO_SX_LOCK));
 		/* x-latch also siblings from left to right */
-		left_page_no = btr_page_get_prev(page, mtr);
+		left_page_no = btr_page_get_prev(page);
 		mode = latch_mode;
 
 		if (left_page_no != FIL_NULL) {
@@ -305,10 +305,9 @@ btr_cur_latch_leaves(
 		/* Sanity check only after both the blocks are latched. */
 		if (latch_leaves.blocks[0] != NULL) {
 			ut_a(page_is_comp(latch_leaves.blocks[0]->frame)
-				== page_is_comp(page));
-			ut_a(btr_page_get_next(
-				latch_leaves.blocks[0]->frame, mtr)
-				== page_get_page_no(page));
+			     == page_is_comp(page));
+			ut_a(btr_page_get_next(latch_leaves.blocks[0]->frame)
+			     == page_get_page_no(page));
 		}
 		ut_a(page_is_comp(get_block->frame) == page_is_comp(page));
 #endif /* UNIV_BTR_DEBUG */
@@ -318,7 +317,7 @@ btr_cur_latch_leaves(
 				= get_block;
 		}
 
-		right_page_no = btr_page_get_next(page, mtr);
+		right_page_no = btr_page_get_next(page);
 
 		if (right_page_no != FIL_NULL) {
 			if (spatial) {
@@ -334,7 +333,7 @@ btr_cur_latch_leaves(
 #ifdef UNIV_BTR_DEBUG
 			ut_a(page_is_comp(get_block->frame)
 			     == page_is_comp(page));
-			ut_a(btr_page_get_prev(get_block->frame, mtr)
+			ut_a(btr_page_get_prev(get_block->frame)
 			     == page_get_page_no(page));
 #endif /* UNIV_BTR_DEBUG */
 			if (spatial) {
@@ -350,7 +349,7 @@ btr_cur_latch_leaves(
 		mode = latch_mode == BTR_SEARCH_PREV ? RW_S_LATCH : RW_X_LATCH;
 		/* latch also left sibling */
 		rw_lock_s_lock(&block->lock);
-		left_page_no = btr_page_get_prev(page, mtr);
+		left_page_no = btr_page_get_prev(page);
 		rw_lock_s_unlock(&block->lock);
 
 		if (left_page_no != FIL_NULL) {
@@ -363,7 +362,7 @@ btr_cur_latch_leaves(
 #ifdef UNIV_BTR_DEBUG
 			ut_a(page_is_comp(get_block->frame)
 			     == page_is_comp(page));
-			ut_a(btr_page_get_next(get_block->frame, mtr)
+			ut_a(btr_page_get_next(get_block->frame)
 			     == page_get_page_no(page));
 #endif /* UNIV_BTR_DEBUG */
 		}
@@ -666,7 +665,7 @@ btr_cur_optimistic_latch_leaves(
 			goto unpin_failed;
 		}
 		left_page_no = btr_page_get_prev(
-			buf_block_get_frame(block), mtr);
+			buf_block_get_frame(block));
 		rw_lock_s_unlock(&block->lock);
 
 		if (left_page_no != FIL_NULL) {
@@ -682,7 +681,7 @@ btr_cur_optimistic_latch_leaves(
 
 		if (buf_page_optimistic_get(mode, block, modify_clock,
 					    file, line, mtr)) {
-			if (btr_page_get_prev(buf_block_get_frame(block), mtr)
+			if (btr_page_get_prev(buf_block_get_frame(block))
 			    == left_page_no) {
 				buf_block_buf_fix_dec(block);
 				*latch_mode = mode;
@@ -1560,8 +1559,7 @@ retry_page_get:
 		rw_latch = upper_rw_latch;
 
 		rw_lock_s_lock(&block->lock);
-		left_page_no = btr_page_get_prev(
-			buf_block_get_frame(block), mtr);
+		left_page_no = btr_page_get_prev(buf_block_get_frame(block));
 		rw_lock_s_unlock(&block->lock);
 
 		if (left_page_no != FIL_NULL) {
@@ -3650,10 +3648,7 @@ btr_cur_pessimistic_insert(
 			}
 
 			if (!page_rec_is_infimum(btr_cur_get_rec(cursor))
-			    || btr_page_get_prev(
-				buf_block_get_frame(
-					btr_cur_get_block(cursor)), mtr)
-			       == FIL_NULL) {
+			    || !page_has_prev(btr_cur_get_page(cursor))) {
 				/* split and inserted need to call
 				lock_update_insert() always. */
 				inherit = true;
@@ -4525,15 +4520,14 @@ btr_cur_pess_upd_restore_supremum(
 		return;
 	}
 
-	const ulint	prev_page_no = btr_page_get_prev(page, mtr);
+	const uint32_t	prev_page_no = btr_page_get_prev(page);
 
 	const page_id_t	page_id(block->page.id.space(), prev_page_no);
 
 	ut_ad(prev_page_no != FIL_NULL);
 	prev_block = buf_page_get_with_no_latch(page_id, block->page.size, mtr);
 #ifdef UNIV_BTR_DEBUG
-	ut_a(btr_page_get_next(prev_block->frame, mtr)
-	     == page_get_page_no(page));
+	ut_a(btr_page_get_next(prev_block->frame) == block->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 
 	/* We must already have an x-latch on prev_block! */
@@ -6065,7 +6059,7 @@ btr_estimate_n_rows_in_range_on_level(
 			n_rows += page_get_n_recs(page);
 		}
 
-		page_id.set_page_no(btr_page_get_next(page, &mtr));
+		page_id.set_page_no(btr_page_get_next(page));
 
 		mtr_commit(&mtr);
 
@@ -7665,8 +7659,8 @@ next_zip_page:
 
 				extern_len -= store_len;
 
-				mlog_write_ulint(field_ref + BTR_EXTERN_LEN, 0,
-						 MLOG_4BYTES, &mtr);
+				ut_ad(!mach_read_from_4(BTR_EXTERN_LEN
+							+ field_ref));
 				mlog_write_ulint(field_ref
 						 + BTR_EXTERN_LEN + 4,
 						 big_rec_vec->fields[i].len
diff --git a/storage/innobase/btr/btr0defragment.cc b/storage/innobase/btr/btr0defragment.cc
index 08dde6d2ae8..86e4cc3d6b5 100644
--- a/storage/innobase/btr/btr0defragment.cc
+++ b/storage/innobase/btr/btr0defragment.cc
@@ -583,7 +583,7 @@ btr_defragment_n_pages(
 	blocks[0] = block;
 	for (uint i = 1; i <= n_pages; i++) {
 		page_t* page = buf_block_get_frame(blocks[i-1]);
-		ulint page_no = btr_page_get_next(page, mtr);
+		ulint page_no = btr_page_get_next(page);
 		total_data_size += page_get_data_size(page);
 		total_n_recs += page_get_n_recs(page);
 		if (page_no == FIL_NULL) {
diff --git a/storage/innobase/btr/btr0pcur.cc b/storage/innobase/btr/btr0pcur.cc
index cfab93193fc..cf82657a3bc 100644
--- a/storage/innobase/btr/btr0pcur.cc
+++ b/storage/innobase/btr/btr0pcur.cc
@@ -433,7 +433,7 @@ btr_pcur_move_to_next_page(
 		return;
 	}
 
-	next_page_no = btr_page_get_next(page, mtr);
+	next_page_no = btr_page_get_next(page);
 
 	ut_ad(next_page_no != FIL_NULL);
 
@@ -460,7 +460,7 @@ btr_pcur_move_to_next_page(
 	next_page = buf_block_get_frame(next_block);
 #ifdef UNIV_BTR_DEBUG
 	ut_a(page_is_comp(next_page) == page_is_comp(page));
-	ut_a(btr_page_get_prev(next_page, mtr)
+	ut_a(btr_page_get_prev(next_page)
 	     == btr_pcur_get_block(cursor)->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 
@@ -522,7 +522,7 @@ btr_pcur_move_backward_from_page(
 
 	page = btr_pcur_get_page(cursor);
 
-	prev_page_no = btr_page_get_prev(page, mtr);
+	prev_page_no = btr_page_get_prev(page);
 
 	if (prev_page_no == FIL_NULL) {
 	} else if (btr_pcur_is_before_first_on_page(cursor)) {
diff --git a/storage/innobase/btr/btr0scrub.cc b/storage/innobase/btr/btr0scrub.cc
index 2839f4f872f..5c6eeff2d6a 100644
--- a/storage/innobase/btr/btr0scrub.cc
+++ b/storage/innobase/btr/btr0scrub.cc
@@ -432,8 +432,8 @@ btr_pessimistic_scrub(
 
 	/* read block variables */
 	const ulint page_no =  mach_read_from_4(page + FIL_PAGE_OFFSET);
-	const ulint left_page_no = mach_read_from_4(page + FIL_PAGE_PREV);
-	const ulint right_page_no = mach_read_from_4(page + FIL_PAGE_NEXT);
+	const uint32_t left_page_no = btr_page_get_prev(page);
+	const uint32_t right_page_no = btr_page_get_next(page);
 	const page_size_t page_size(index->table->space->flags);
 
 	/**
@@ -465,8 +465,8 @@ btr_pessimistic_scrub(
 		/**
 		* structure should be unchanged
 		*/
-		ut_a(left_page_no == btr_page_get_prev(page, mtr));
-		ut_a(right_page_no == btr_page_get_next(page, mtr));
+		ut_a(left_page_no == btr_page_get_prev(page));
+		ut_a(right_page_no == btr_page_get_next(page));
 	}
 
 	if (right_page_no != FIL_NULL) {
diff --git a/storage/innobase/btr/btr0sea.cc b/storage/innobase/btr/btr0sea.cc
index 53f0de4fa63..a19c67ac1fd 100644
--- a/storage/innobase/btr/btr0sea.cc
+++ b/storage/innobase/btr/btr0sea.cc
@@ -782,10 +782,7 @@ btr_search_check_guess(
 		const rec_t* prev_rec = page_rec_get_prev(rec);
 
 		if (page_rec_is_infimum(prev_rec)) {
-			success = *reinterpret_cast<const uint32_t*>(
-				page_align(prev_rec) + FIL_PAGE_PREV)
-				== FIL_NULL;
-
+			success = !page_has_prev(page_align(prev_rec));
 			goto exit_func;
 		}
 
@@ -804,10 +801,7 @@ btr_search_check_guess(
 		const rec_t* next_rec = page_rec_get_next(rec);
 
 		if (page_rec_is_supremum(next_rec)) {
-			if (*reinterpret_cast<const uint32_t*>(
-				    page_align(next_rec) + FIL_PAGE_NEXT)
-			    == FIL_NULL) {
-
+			if (!page_has_next(page_align(next_rec))) {
 				cursor->up_match = 0;
 				success = TRUE;
 			}
diff --git a/storage/innobase/dict/dict0boot.cc b/storage/innobase/dict/dict0boot.cc
index f62bed52990..87a2fe3f03f 100644
--- a/storage/innobase/dict/dict0boot.cc
+++ b/storage/innobase/dict/dict0boot.cc
@@ -1,7 +1,7 @@
 /*****************************************************************************
 
 Copyright (c) 1996, 2017, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2016, MariaDB Corporation.
+Copyright (c) 2016, 2019, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -198,8 +198,7 @@ dict_hdr_create(
 	mlog_write_ull(dict_header + DICT_HDR_INDEX_ID,
 		       DICT_HDR_FIRST_ID, mtr);
 
-	mlog_write_ulint(dict_header + DICT_HDR_MAX_SPACE_ID,
-			 0, MLOG_4BYTES, mtr);
+	ut_ad(mach_read_from_4(dict_header + DICT_HDR_MAX_SPACE_ID) == 0);
 
 	/* Obsolete, but we must initialize it anyway. */
 	mlog_write_ulint(dict_header + DICT_HDR_MIX_ID_LOW,
diff --git a/storage/innobase/dict/dict0crea.cc b/storage/innobase/dict/dict0crea.cc
index d424446ba87..b6149edaa7a 100644
--- a/storage/innobase/dict/dict0crea.cc
+++ b/storage/innobase/dict/dict0crea.cc
@@ -870,11 +870,14 @@ dict_create_index_tree_step(
 				err = DB_OUT_OF_FILE_SPACE; );
 	}
 
-	page_rec_write_field(
-		btr_pcur_get_rec(&pcur), DICT_FLD__SYS_INDEXES__PAGE_NO,
-		node->page_no, &mtr);
-
-	btr_pcur_close(&pcur);
+	ulint   len;
+	byte*   data = rec_get_nth_field_old(btr_pcur_get_rec(&pcur),
+					     DICT_FLD__SYS_INDEXES__PAGE_NO,
+					     &len);
+	ut_ad(len == 4);
+	if (mach_read_from_4(data) != node->page_no) {
+		mlog_write_ulint(data, node->page_no, MLOG_4BYTES, &mtr);
+	}
 
 	mtr.commit();
 
diff --git a/storage/innobase/fsp/fsp0fsp.cc b/storage/innobase/fsp/fsp0fsp.cc
index 39facdf1d77..594adfb0a94 100644
--- a/storage/innobase/fsp/fsp0fsp.cc
+++ b/storage/innobase/fsp/fsp0fsp.cc
@@ -1426,7 +1426,8 @@ fsp_free_page(
 	const ulint	bit = offset % FSP_EXTENT_SIZE;
 
 	xdes_set_bit(descr, XDES_FREE_BIT, bit, TRUE, mtr);
-	xdes_set_bit(descr, XDES_CLEAN_BIT, bit, TRUE, mtr);
+	/* xdes_init() should have set all XDES_CLEAN_BIT */
+	ut_ad(xdes_get_bit(descr, XDES_CLEAN_BIT, bit));
 
 	frag_n_used = mtr_read_ulint(header + FSP_FRAG_N_USED, MLOG_4BYTES,
 				     mtr);
@@ -1583,9 +1584,7 @@ fsp_alloc_seg_inode_page(
 	fsp_header_t*	space_header,
 	mtr_t*		mtr)
 {
-	fseg_inode_t*	inode;
 	buf_block_t*	block;
-	page_t*		page;
 
 	ut_ad(page_offset(space_header) == FSP_HEADER_OFFSET);
 	ut_ad(page_get_space_id(page_align(space_header)) == space->id);
@@ -1603,22 +1602,20 @@ fsp_alloc_seg_inode_page(
 	buf_block_dbg_add_level(block, SYNC_FSP_PAGE);
 	ut_ad(rw_lock_get_sx_lock_count(&block->lock) == 1);
 
-	page = buf_block_get_frame(block);
-
-	mlog_write_ulint(page + FIL_PAGE_TYPE, FIL_PAGE_INODE,
+	mlog_write_ulint(block->frame + FIL_PAGE_TYPE, FIL_PAGE_INODE,
 			 MLOG_2BYTES, mtr);
 
-	for (ulint i = 0; i < FSP_SEG_INODES_PER_PAGE(page_size); i++) {
-
-		inode = fsp_seg_inode_page_get_nth_inode(
-			page, i, page_size, mtr);
-
-		mlog_write_ull(inode + FSEG_ID, 0, mtr);
+#ifdef UNIV_DEBUG
+	const byte* inode = FSEG_ID + FSEG_ARR_OFFSET + block->frame;
+	for (ulint i = FSP_SEG_INODES_PER_PAGE(page_size); i--;
+	     inode += FSEG_INODE_SIZE) {
+		ut_ad(!mach_read_from_8(inode));
 	}
+#endif
 
 	flst_add_last(
 		space_header + FSP_SEG_INODES_FREE,
-		page + FSEG_INODE_PAGE_NODE, mtr);
+		block->frame + FSEG_INODE_PAGE_NODE, mtr);
 
 	return(true);
 }
@@ -2907,7 +2904,8 @@ fseg_free_page_low(
 	const ulint	bit = offset % FSP_EXTENT_SIZE;
 
 	xdes_set_bit(descr, XDES_FREE_BIT, bit, TRUE, mtr);
-	xdes_set_bit(descr, XDES_CLEAN_BIT, bit, TRUE, mtr);
+	/* xdes_init() should have set all XDES_CLEAN_BIT */
+	ut_ad(xdes_get_bit(descr, XDES_CLEAN_BIT, bit));
 
 	if (xdes_is_free(descr, mtr)) {
 		/* The extent has become free: free it to space */
diff --git a/storage/innobase/gis/gis0rtree.cc b/storage/innobase/gis/gis0rtree.cc
index 43f401b4eef..35bfe3f701f 100644
--- a/storage/innobase/gis/gis0rtree.cc
+++ b/storage/innobase/gis/gis0rtree.cc
@@ -603,16 +603,10 @@ update_mbr:
 		}
 	}
 
-#ifdef UNIV_DEBUG
-	ulint	left_page_no = btr_page_get_prev(page, mtr);
-
-	if (left_page_no == FIL_NULL) {
-
-		ut_a(REC_INFO_MIN_REC_FLAG & rec_get_info_bits(
-			page_rec_get_next(page_get_infimum_rec(page)),
-			page_is_comp(page)));
-	}
-#endif /* UNIV_DEBUG */
+	ut_ad(page_has_prev(page)
+	      || (REC_INFO_MIN_REC_FLAG & rec_get_info_bits(
+			  page_rec_get_next(page_get_infimum_rec(page)),
+			  page_is_comp(page))));
 
 	mem_heap_free(heap);
 
@@ -646,9 +640,6 @@ rtr_adjust_upper_level(
 	mem_heap_t*	heap;
 	ulint		level;
 	dtuple_t*	node_ptr_upper;
-	ulint		prev_page_no;
-	ulint		next_page_no;
-	ulint		space;
 	page_cur_t*	page_cursor;
 	lock_prdt_t	prdt;
 	lock_prdt_t	new_prdt;
@@ -749,38 +740,19 @@ rtr_adjust_upper_level(
 
 	mem_heap_free(heap);
 
-	/* Get the previous and next pages of page */
-	prev_page_no = btr_page_get_prev(page, mtr);
-	next_page_no = btr_page_get_next(page, mtr);
-	space = block->page.id.space();
-	const page_size_t&	page_size = dict_table_page_size(index->table);
-
-	/* Update page links of the level */
-	if (prev_page_no != FIL_NULL) {
-		page_id_t	prev_page_id(space, prev_page_no);
-
-		buf_block_t*	prev_block = btr_block_get(
-			prev_page_id, page_size, RW_X_LATCH, index, mtr);
-#ifdef UNIV_BTR_DEBUG
-		ut_a(page_is_comp(prev_block->frame) == page_is_comp(page));
-		ut_a(btr_page_get_next(prev_block->frame, mtr)
-		     == block->page.id.page_no());
-#endif /* UNIV_BTR_DEBUG */
-
-		btr_page_set_next(buf_block_get_frame(prev_block),
-				  buf_block_get_page_zip(prev_block),
-				  page_no, mtr);
-	}
+	const uint32_t next_page_no = btr_page_get_next(page);
 
 	if (next_page_no != FIL_NULL) {
-		page_id_t	next_page_id(space, next_page_no);
+		page_id_t	next_page_id(block->page.id.space(),
+					     next_page_no);
 
 		buf_block_t*	next_block = btr_block_get(
-			next_page_id, page_size, RW_X_LATCH, index, mtr);
+			next_page_id, dict_table_page_size(index->table),
+			RW_X_LATCH, index, mtr);
 #ifdef UNIV_BTR_DEBUG
 		ut_a(page_is_comp(next_block->frame) == page_is_comp(page));
-		ut_a(btr_page_get_prev(next_block->frame, mtr)
-		     == page_get_page_no(page));
+		ut_a(btr_page_get_prev(next_block->frame)
+		     == block->page.id.page_no());
 #endif /* UNIV_BTR_DEBUG */
 
 		btr_page_set_prev(buf_block_get_frame(next_block),
@@ -788,7 +760,6 @@ rtr_adjust_upper_level(
 				  new_page_no, mtr);
 	}
 
-	btr_page_set_prev(page, page_zip, prev_page_no, mtr);
 	btr_page_set_next(page, page_zip, new_page_no, mtr);
 
 	btr_page_set_prev(new_page, new_page_zip, page_no, mtr);
diff --git a/storage/innobase/gis/gis0sea.cc b/storage/innobase/gis/gis0sea.cc
index 2c5be1ec922..2a42d78938d 100644
--- a/storage/innobase/gis/gis0sea.cc
+++ b/storage/innobase/gis/gis0sea.cc
@@ -288,7 +288,7 @@ rtr_pcur_getnext_from_path(
 		Note that we have SX lock on index->lock, there
 		should not be any split/shrink happening here */
 		if (page_ssn > path_ssn) {
-			ulint next_page_no = btr_page_get_next(page, mtr);
+			uint32_t next_page_no = btr_page_get_next(page);
 			rtr_non_leaf_stack_push(
 				rtr_info->path, next_page_no, path_ssn,
 				level, 0, NULL, 0);
@@ -1405,7 +1405,7 @@ search_again:
 	/* Check the page SSN to see if it has been splitted, if so, search
 	the right page */
 	if (!ret && page_ssn > path_ssn) {
-		page_no = btr_page_get_next(page, mtr);
+		page_no = btr_page_get_next(page);
 		goto search_again;
 	}
 
diff --git a/storage/innobase/ibuf/ibuf0ibuf.cc b/storage/innobase/ibuf/ibuf0ibuf.cc
index 92d0aadca18..c86abda7166 100644
--- a/storage/innobase/ibuf/ibuf0ibuf.cc
+++ b/storage/innobase/ibuf/ibuf0ibuf.cc
@@ -2980,7 +2980,7 @@ ibuf_get_volume_buffered(
 
 	/* Look at the previous page */
 
-	prev_page_no = btr_page_get_prev(page, mtr);
+	prev_page_no = btr_page_get_prev(page);
 
 	if (prev_page_no == FIL_NULL) {
 
@@ -3001,7 +3001,7 @@ ibuf_get_volume_buffered(
 	}
 
 #ifdef UNIV_BTR_DEBUG
-	ut_a(btr_page_get_next(prev_page, mtr) == page_get_page_no(page));
+	ut_a(!memcmp(prev_page + FIL_PAGE_NEXT, page + FIL_PAGE_OFFSET, 4));
 #endif /* UNIV_BTR_DEBUG */
 
 	rec = page_get_supremum_rec(prev_page);
@@ -3052,7 +3052,7 @@ count_later:
 
 	/* Look at the next page */
 
-	next_page_no = btr_page_get_next(page, mtr);
+	next_page_no = btr_page_get_next(page);
 
 	if (next_page_no == FIL_NULL) {
 
@@ -3073,7 +3073,7 @@ count_later:
 	}
 
 #ifdef UNIV_BTR_DEBUG
-	ut_a(btr_page_get_prev(next_page, mtr) == page_get_page_no(page));
+	ut_a(!memcmp(next_page + FIL_PAGE_PREV, page + FIL_PAGE_OFFSET, 4));
 #endif /* UNIV_BTR_DEBUG */
 
 	rec = page_get_infimum_rec(next_page);
diff --git a/storage/innobase/include/btr0btr.h b/storage/innobase/include/btr0btr.h
index b8c0425e42c..d68b02eda4d 100644
--- a/storage/innobase/include/btr0btr.h
+++ b/storage/innobase/include/btr0btr.h
@@ -279,26 +279,23 @@ btr_page_get_level(const page_t* page)
 
 	return(level);
 } MY_ATTRIBUTE((warn_unused_result))
-/********************************************************//**
-Gets the next index page number.
-@return next page number */
-UNIV_INLINE
-ulint
-btr_page_get_next(
-/*==============*/
-	const page_t*	page,	/*!< in: index page */
-	mtr_t*		mtr)	/*!< in: mini-transaction handle */
-	MY_ATTRIBUTE((warn_unused_result));
-/********************************************************//**
-Gets the previous index page number.
-@return prev page number */
-UNIV_INLINE
-ulint
-btr_page_get_prev(
-/*==============*/
-	const page_t*	page,	/*!< in: index page */
-	mtr_t*		mtr)	/*!< in: mini-transaction handle */
-	MY_ATTRIBUTE((warn_unused_result));
+
+/** Read FIL_PAGE_NEXT.
+@param page  buffer pool page
+@return previous page number */
+inline uint32_t btr_page_get_next(const page_t* page)
+{
+  return mach_read_from_4(page + FIL_PAGE_NEXT);
+}
+
+/** Read FIL_PAGE_PREV.
+@param page  buffer pool page
+@return previous page number */
+inline uint32_t btr_page_get_prev(const page_t* page)
+{
+  return mach_read_from_4(page + FIL_PAGE_PREV);
+}
+
 /**************************************************************//**
 Releases the latch on a leaf page and bufferunfixes it. */
 UNIV_INLINE
diff --git a/storage/innobase/include/btr0btr.ic b/storage/innobase/include/btr0btr.ic
index b06816f653d..c3f0d5e305e 100644
--- a/storage/innobase/include/btr0btr.ic
+++ b/storage/innobase/include/btr0btr.ic
@@ -135,23 +135,6 @@ btr_page_set_level(
 }
 
 /********************************************************//**
-Gets the next index page number.
-@return next page number */
-UNIV_INLINE
-ulint
-btr_page_get_next(
-/*==============*/
-	const page_t*	page,	/*!< in: index page */
-	mtr_t*		mtr MY_ATTRIBUTE((unused)))
-				/*!< in: mini-transaction handle */
-{
-	ut_ad(page != NULL);
-	ut_ad(mtr != NULL);
-
-	return(mach_read_from_4(page + FIL_PAGE_NEXT));
-}
-
-/********************************************************//**
 Sets the next index page field. */
 UNIV_INLINE
 void
@@ -175,22 +158,6 @@ btr_page_set_next(
 }
 
 /********************************************************//**
-Gets the previous index page number.
-@return prev page number */
-UNIV_INLINE
-ulint
-btr_page_get_prev(
-/*==============*/
-	const page_t*	page,	/*!< in: index page */
-	mtr_t*	mtr MY_ATTRIBUTE((unused))) /*!< in: mini-transaction handle */
-{
-	ut_ad(page != NULL);
-	ut_ad(mtr != NULL);
-
-	return(mach_read_from_4(page + FIL_PAGE_PREV));
-}
-
-/********************************************************//**
 Sets the previous index page field. */
 UNIV_INLINE
 void
diff --git a/storage/innobase/include/page0page.h b/storage/innobase/include/page0page.h
index f59f70d0f4c..e6df074e4a9 100644
--- a/storage/innobase/include/page0page.h
+++ b/storage/innobase/include/page0page.h
@@ -876,17 +876,6 @@ page_rec_find_owner_rec(
 /*====================*/
 	rec_t*	rec);	/*!< in: the physical record */
 
-/***********************************************************************//**
-Write a 32-bit field in a data dictionary record. */
-UNIV_INLINE
-void
-page_rec_write_field(
-/*=================*/
-	rec_t*	rec,	/*!< in/out: record to update */
-	ulint	i,	/*!< in: index of the field to update */
-	ulint	val,	/*!< in: value to write */
-	mtr_t*	mtr)	/*!< in/out: mini-transaction */
-	MY_ATTRIBUTE((nonnull));
 /************************************************************//**
 Returns the maximum combined size of records which can be inserted on top
 of record heap.
diff --git a/storage/innobase/include/page0page.ic b/storage/innobase/include/page0page.ic
index 9785b451a06..e5368938531 100644
--- a/storage/innobase/include/page0page.ic
+++ b/storage/innobase/include/page0page.ic
@@ -919,27 +919,6 @@ page_get_free_space_of_empty(
 		       - 2 * PAGE_DIR_SLOT_SIZE));
 }
 
-/***********************************************************************//**
-Write a 32-bit field in a data dictionary record. */
-UNIV_INLINE
-void
-page_rec_write_field(
-/*=================*/
-	rec_t*	rec,	/*!< in/out: record to update */
-	ulint	i,	/*!< in: index of the field to update */
-	ulint	val,	/*!< in: value to write */
-	mtr_t*	mtr)	/*!< in/out: mini-transaction */
-{
-	byte*	data;
-	ulint	len;
-
-	data = rec_get_nth_field_old(rec, i, &len);
-
-	ut_ad(len == 4);
-
-	mlog_write_ulint(data, val, MLOG_4BYTES, mtr);
-}
-
 /************************************************************//**
 Each user record on a page, and also the deleted user records in the heap
 takes its size plus the fraction of the dir cell size /
diff --git a/storage/innobase/row/row0merge.cc b/storage/innobase/row/row0merge.cc
index 404dcd491e2..e488560b97f 100644
--- a/storage/innobase/row/row0merge.cc
+++ b/storage/innobase/row/row0merge.cc
@@ -2020,7 +2020,7 @@ end_of_index:
 				buf_block_t*	block;
 
 				next_page_no = btr_page_get_next(
-					page_cur_get_page(cur), &mtr);
+					page_cur_get_page(cur));
 
 				if (next_page_no == FIL_NULL) {
 					goto end_of_index;
diff --git a/storage/innobase/row/row0trunc.cc b/storage/innobase/row/row0trunc.cc
index 2c5b4a81599..fa22ad93e0a 100644
--- a/storage/innobase/row/row0trunc.cc
+++ b/storage/innobase/row/row0trunc.cc
@@ -670,12 +670,12 @@ CreateIndex::operator()(mtr_t* mtr, btr_pcur_t* pcur) const
 	DBUG_EXECUTE_IF("ib_err_trunc_create_index", return DB_ERROR;);
 
 	if (root_page_no != FIL_NULL) {
-
-		rec_t*	rec = btr_pcur_get_rec(pcur);
-
-		page_rec_write_field(
-			rec, DICT_FLD__SYS_INDEXES__PAGE_NO,
-			root_page_no, mtr);
+		ulint   len;
+		byte*   data = rec_get_nth_field_old(
+			btr_pcur_get_rec(pcur),
+			DICT_FLD__SYS_INDEXES__PAGE_NO, &len);
+		ut_ad(len == 4);
+		mlog_write_ulint(data, root_page_no, MLOG_4BYTES, mtr);
 
 		/* We will need to commit and restart the
 		mini-transaction in order to avoid deadlocks.