diff --git a/include/mtr0mtr.h b/include/mtr0mtr.h
index 1e9b78c3356..69a2c03f4cb 100644
--- a/include/mtr0mtr.h
+++ b/include/mtr0mtr.h
@@ -54,118 +54,137 @@ first 3 values must be RW_S_LATCH, RW_X_LATCH, RW_NO_LATCH */
 #define	MTR_MEMO_S_LOCK		55
 #define	MTR_MEMO_X_LOCK		56
 
-/* Log item types: we have made them to be of the type 'byte'
-for the compiler to warn if val and type parameters are switched
-in a call to mlog_write_ulint. NOTE! For 1 - 8 bytes, the
-flag value must give the length also! */
-#define	MLOG_SINGLE_REC_FLAG	128		/* if the mtr contains only
+/** @name Log item types
+The log items are declared 'byte' so that the compiler can warn if val
+and type parameters are switched in a call to mlog_write_ulint. NOTE!
+For 1 - 8 bytes, the flag value must give the length also! @{ */
+#define	MLOG_SINGLE_REC_FLAG	128		/*!< if the mtr contains only
 						one log record for one page,
 						i.e., write_initial_log_record
 						has been called only once,
 						this flag is ORed to the type
 						of that first log record */
-#define	MLOG_1BYTE		(1)		/* one byte is written */
-#define	MLOG_2BYTES		(2)		/* 2 bytes ... */
-#define	MLOG_4BYTES		(4)		/* 4 bytes ... */
-#define	MLOG_8BYTES		(8)		/* 8 bytes ... */
-#define	MLOG_REC_INSERT		((byte)9)	/* record insert */
-#define	MLOG_REC_CLUST_DELETE_MARK ((byte)10)	/* mark clustered index record
+#define	MLOG_1BYTE		(1)		/*!< one byte is written */
+#define	MLOG_2BYTES		(2)		/*!< 2 bytes ... */
+#define	MLOG_4BYTES		(4)		/*!< 4 bytes ... */
+#define	MLOG_8BYTES		(8)		/*!< 8 bytes ... */
+#define	MLOG_REC_INSERT		((byte)9)	/*!< record insert */
+#define	MLOG_REC_CLUST_DELETE_MARK ((byte)10)	/*!< mark clustered index record
 						deleted */
-#define	MLOG_REC_SEC_DELETE_MARK ((byte)11)	/* mark secondary index record
+#define	MLOG_REC_SEC_DELETE_MARK ((byte)11)	/*!< mark secondary index record
 						deleted */
-#define MLOG_REC_UPDATE_IN_PLACE ((byte)13)	/* update of a record,
+#define MLOG_REC_UPDATE_IN_PLACE ((byte)13)	/*!< update of a record,
 						preserves record field sizes */
-#define MLOG_REC_DELETE		((byte)14)	/* delete a record from a
+#define MLOG_REC_DELETE		((byte)14)	/*!< delete a record from a
 						page */
-#define	MLOG_LIST_END_DELETE	((byte)15)	/* delete record list end on
+#define	MLOG_LIST_END_DELETE	((byte)15)	/*!< delete record list end on
 						index page */
-#define	MLOG_LIST_START_DELETE	((byte)16)	/* delete record list start on
+#define	MLOG_LIST_START_DELETE	((byte)16)	/*!< delete record list start on
 						index page */
-#define	MLOG_LIST_END_COPY_CREATED ((byte)17)	/* copy record list end to a
+#define	MLOG_LIST_END_COPY_CREATED ((byte)17)	/*!< copy record list end to a
 						new created index page */
-#define	MLOG_PAGE_REORGANIZE	((byte)18)	/* reorganize an index page */
-#define MLOG_PAGE_CREATE	((byte)19)	/* create an index page */
-#define	MLOG_UNDO_INSERT	((byte)20)	/* insert entry in an undo
+#define	MLOG_PAGE_REORGANIZE	((byte)18)	/*!< reorganize an
+						index page in
+						ROW_FORMAT=REDUNDANT */
+#define MLOG_PAGE_CREATE	((byte)19)	/*!< create an index page */
+#define	MLOG_UNDO_INSERT	((byte)20)	/*!< insert entry in an undo
 						log */
-#define MLOG_UNDO_ERASE_END	((byte)21)	/* erase an undo log
+#define MLOG_UNDO_ERASE_END	((byte)21)	/*!< erase an undo log
 						page end */
-#define	MLOG_UNDO_INIT		((byte)22)	/* initialize a page in an
+#define	MLOG_UNDO_INIT		((byte)22)	/*!< initialize a page in an
 						undo log */
-#define MLOG_UNDO_HDR_DISCARD	((byte)23)	/* discard an update undo log
+#define MLOG_UNDO_HDR_DISCARD	((byte)23)	/*!< discard an update undo log
 						header */
-#define	MLOG_UNDO_HDR_REUSE	((byte)24)	/* reuse an insert undo log
+#define	MLOG_UNDO_HDR_REUSE	((byte)24)	/*!< reuse an insert undo log
 						header */
-#define MLOG_UNDO_HDR_CREATE	((byte)25)	/* create an undo log header */
-#define MLOG_REC_MIN_MARK	((byte)26)	/* mark an index record as the
-						predefined minimum record */
-#define MLOG_IBUF_BITMAP_INIT	((byte)27)	/* initialize an ibuf bitmap
-						page */
+#define MLOG_UNDO_HDR_CREATE	((byte)25)	/*!< create an undo
+						log header */
+#define MLOG_REC_MIN_MARK	((byte)26)	/*!< mark an index
+						record as the
+						predefined minimum
+						record */
+#define MLOG_IBUF_BITMAP_INIT	((byte)27)	/*!< initialize an
+						ibuf bitmap page */
 /*#define	MLOG_FULL_PAGE	((byte)28)	full contents of a page */
-#define MLOG_INIT_FILE_PAGE	((byte)29)	/* this means that a file page
-						is taken into use and the prior
-						contents of the page should be
-						ignored: in recovery we must
-						not trust the lsn values stored
-						to the file page */
-#define MLOG_WRITE_STRING	((byte)30)	/* write a string to a page */
-#define	MLOG_MULTI_REC_END	((byte)31)	/* if a single mtr writes
+#define MLOG_INIT_FILE_PAGE	((byte)29)	/*!< this means that a
+						file page is taken
+						into use and the prior
+						contents of the page
+						should be ignored: in
+						recovery we must not
+						trust the lsn values
+						stored to the file
+						page */
+#define MLOG_WRITE_STRING	((byte)30)	/*!< write a string to
+						a page */
+#define	MLOG_MULTI_REC_END	((byte)31)	/*!< if a single mtr writes
 						log records for several pages,
 						this log record ends the
 						sequence of these records */
-#define MLOG_DUMMY_RECORD	((byte)32)	/* dummy log record used to
+#define MLOG_DUMMY_RECORD	((byte)32)	/*!< dummy log record used to
 						pad a log block full */
-#define MLOG_FILE_CREATE	((byte)33)	/* log record about an .ibd
+#define MLOG_FILE_CREATE	((byte)33)	/*!< log record about an .ibd
 						file creation */
-#define MLOG_FILE_RENAME	((byte)34)	/* log record about an .ibd
+#define MLOG_FILE_RENAME	((byte)34)	/*!< log record about an .ibd
 						file rename */
-#define MLOG_FILE_DELETE	((byte)35)	/* log record about an .ibd
+#define MLOG_FILE_DELETE	((byte)35)	/*!< log record about an .ibd
 						file deletion */
-#define MLOG_COMP_REC_MIN_MARK	((byte)36)	/* mark a compact index record
-						as the predefined minimum
+#define MLOG_COMP_REC_MIN_MARK	((byte)36)	/*!< mark a compact
+						index record as the
+						predefined minimum
 						record */
-#define MLOG_COMP_PAGE_CREATE	((byte)37)	/* create a compact
+#define MLOG_COMP_PAGE_CREATE	((byte)37)	/*!< create a compact
 						index page */
-#define MLOG_COMP_REC_INSERT	((byte)38)	/* compact record insert */
+#define MLOG_COMP_REC_INSERT	((byte)38)	/*!< compact record insert */
 #define MLOG_COMP_REC_CLUST_DELETE_MARK ((byte)39)
-						/* mark compact clustered index
-						record deleted */
-#define MLOG_COMP_REC_SEC_DELETE_MARK ((byte)40)/* mark compact secondary index
-						record deleted; this log
-						record type is redundant, as
-						MLOG_REC_SEC_DELETE_MARK is
-						independent of the record
-						format. */
-#define MLOG_COMP_REC_UPDATE_IN_PLACE ((byte)41)/* update of a compact record,
-						preserves record field sizes */
-#define MLOG_COMP_REC_DELETE	((byte)42)	/* delete a compact record
+						/*!< mark compact
+						clustered index record
+						deleted */
+#define MLOG_COMP_REC_SEC_DELETE_MARK ((byte)40)/*!< mark compact
+						secondary index record
+						deleted; this log
+						record type is
+						redundant, as
+						MLOG_REC_SEC_DELETE_MARK
+						is independent of the
+						record format. */
+#define MLOG_COMP_REC_UPDATE_IN_PLACE ((byte)41)/*!< update of a
+						compact record,
+						preserves record field
+						sizes */
+#define MLOG_COMP_REC_DELETE	((byte)42)	/*!< delete a compact record
 						from a page */
-#define MLOG_COMP_LIST_END_DELETE ((byte)43)	/* delete compact record list
+#define MLOG_COMP_LIST_END_DELETE ((byte)43)	/*!< delete compact record list
 						end on index page */
-#define MLOG_COMP_LIST_START_DELETE ((byte)44)	/* delete compact record list
+#define MLOG_COMP_LIST_START_DELETE ((byte)44)	/*!< delete compact record list
 						start on index page */
 #define MLOG_COMP_LIST_END_COPY_CREATED ((byte)45)
-						/* copy compact record list end
-						to a new created index page */
-#define MLOG_COMP_PAGE_REORGANIZE ((byte)46)	/* reorganize an index page */
-#define MLOG_FILE_CREATE2	((byte)47)	/* log record about creating
+						/*!< copy compact
+						record list end to a
+						new created index
+						page */
+#define MLOG_COMP_PAGE_REORGANIZE ((byte)46)	/*!< reorganize an index page */
+#define MLOG_FILE_CREATE2	((byte)47)	/*!< log record about creating
 						an .ibd file, with format */
-#define MLOG_ZIP_WRITE_NODE_PTR	((byte)48)	/* write the node pointer of
+#define MLOG_ZIP_WRITE_NODE_PTR	((byte)48)	/*!< write the node pointer of
 						a record on a compressed
 						non-leaf B-tree page */
-#define MLOG_ZIP_WRITE_BLOB_PTR	((byte)49)	/* write the BLOB pointer
+#define MLOG_ZIP_WRITE_BLOB_PTR	((byte)49)	/*!< write the BLOB pointer
 						of an externally stored column
 						on a compressed page */
-#define MLOG_ZIP_WRITE_HEADER	((byte)50)	/* write to compressed page
+#define MLOG_ZIP_WRITE_HEADER	((byte)50)	/*!< write to compressed page
 						header */
-#define MLOG_ZIP_PAGE_COMPRESS	((byte)51)	/* compress an index page */
-#define MLOG_BIGGEST_TYPE	((byte)51)	/* biggest value (used in
-						asserts) */
+#define MLOG_ZIP_PAGE_COMPRESS	((byte)51)	/*!< compress an index page */
+#define MLOG_BIGGEST_TYPE	((byte)51)	/*!< biggest value (used in
+						assertions) */
+/* @} */
 
-/* Flags for MLOG_FILE operations (stored in the page number
-parameter, called log_flags in the functions).  The page number
-parameter was initially written as 0. */
-#define MLOG_FILE_FLAG_TEMP	1	/* identifies TEMPORARY TABLE in
+/** @name Flags for MLOG_FILE operations
+(stored in the page number parameter, called log_flags in the
+functions).  The page number parameter was originally written as 0. @{ */
+#define MLOG_FILE_FLAG_TEMP	1	/*!< identifies TEMPORARY TABLE in
 					MLOG_FILE_CREATE, MLOG_FILE_CREATE2 */
+/* @} */
 
 /***************************************************************//**
 Starts a mini-transaction and creates a mini-transaction handle