MDEV-21534 fixup: Remove traces of removed log_sys.write_mutex

This was missed in commit 30ea63b7d2.

storage/innobase/handler/ha_innodb.cc

@@ -524,7 +524,6 @@ static PSI_mutex_info all_innodb_mutexes[] = {
 	PSI_KEY(ibuf_mutex),
 	PSI_KEY(ibuf_pessimistic_insert_mutex),
 	PSI_KEY(log_sys_mutex),
-	PSI_KEY(log_sys_write_mutex),
 	PSI_KEY(mutex_list_mutex),
 	PSI_KEY(page_zip_stat_per_index_mutex),
 	PSI_KEY(purge_sys_pq_mutex),

storage/innobase/include/log0log.h

@@ -547,7 +547,7 @@ public:
   byte *flush_buf;
   /** recommended maximum size of buf, after which the buffer is flushed */
   size_t max_buf_free;
-  /** Log file stuff. Protected by mutex or write_mutex. */
+  /** Log file stuff. Protected by mutex. */
   struct file {
     /** format of the redo log: e.g., FORMAT_10_5 */
     uint32_t				format;

storage/innobase/include/srv0srv.h

@@ -74,8 +74,7 @@ struct srv_stats_t
 	/** Amount of data written to the log files in bytes */
 	lsn_ctr_1_t		os_log_written;
 
-	/** Number of writes being done to the log files.
-	Protected by log_sys.write_mutex. */
+	/** Number of writes being done to the log files */
 	ulint_ctr_1_t		os_log_pending_writes;
 
 	/** We increase this counter, when we don't have enough

storage/innobase/include/sync0sync.h

@@ -65,7 +65,6 @@ extern mysql_pfs_key_t	ibuf_bitmap_mutex_key;
 extern mysql_pfs_key_t	ibuf_mutex_key;
 extern mysql_pfs_key_t	ibuf_pessimistic_insert_mutex_key;
 extern mysql_pfs_key_t	log_sys_mutex_key;
-extern mysql_pfs_key_t	log_sys_write_mutex_key;
 extern mysql_pfs_key_t	log_cmdq_mutex_key;
 extern mysql_pfs_key_t	log_flush_order_mutex_key;
 extern mysql_pfs_key_t	mutex_list_mutex_key;

storage/innobase/include/sync0types.h

@@ -212,7 +212,6 @@ enum latch_level_t {
 	SYNC_RECV,
 	SYNC_LOG_FLUSH_ORDER,
 	SYNC_LOG,
-	SYNC_LOG_WRITE,
 	SYNC_PAGE_CLEANER,
 	SYNC_PURGE_QUEUE,
 	SYNC_TRX_SYS_HEADER,
@@ -297,7 +296,6 @@ enum latch_id_t {
 	LATCH_ID_IBUF,
 	LATCH_ID_IBUF_PESSIMISTIC_INSERT,
 	LATCH_ID_LOG_SYS,
-	LATCH_ID_LOG_WRITE,
 	LATCH_ID_LOG_FLUSH_ORDER,
 	LATCH_ID_LIST,
 	LATCH_ID_MUTEX_LIST,

storage/innobase/sync/sync0debug.cc

@@ -469,7 +469,6 @@ LatchDebug::LatchDebug()
 	LEVEL_MAP_INSERT(SYNC_RECV);
 	LEVEL_MAP_INSERT(SYNC_LOG_FLUSH_ORDER);
 	LEVEL_MAP_INSERT(SYNC_LOG);
-	LEVEL_MAP_INSERT(SYNC_LOG_WRITE);
 	LEVEL_MAP_INSERT(SYNC_PAGE_CLEANER);
 	LEVEL_MAP_INSERT(SYNC_PURGE_QUEUE);
 	LEVEL_MAP_INSERT(SYNC_TRX_SYS_HEADER);
@@ -750,7 +749,6 @@ LatchDebug::check_order(
 	case SYNC_FTS_CACHE_INIT:
 	case SYNC_PAGE_CLEANER:
 	case SYNC_LOG:
-	case SYNC_LOG_WRITE:
 	case SYNC_LOG_FLUSH_ORDER:
 	case SYNC_DOUBLEWRITE:
 	case SYNC_SEARCH_SYS:
@@ -1292,8 +1290,6 @@ sync_latch_meta_init()
 
 	LATCH_ADD_MUTEX(LOG_SYS, SYNC_LOG, log_sys_mutex_key);
 
-	LATCH_ADD_MUTEX(LOG_WRITE, SYNC_LOG_WRITE, log_sys_write_mutex_key);
-
 	LATCH_ADD_MUTEX(LOG_FLUSH_ORDER, SYNC_LOG_FLUSH_ORDER,
 			log_flush_order_mutex_key);
 

storage/innobase/sync/sync0sync.cc

@@ -51,7 +51,6 @@ mysql_pfs_key_t	ibuf_bitmap_mutex_key;
 mysql_pfs_key_t	ibuf_mutex_key;
 mysql_pfs_key_t	ibuf_pessimistic_insert_mutex_key;
 mysql_pfs_key_t	log_sys_mutex_key;
-mysql_pfs_key_t	log_sys_write_mutex_key;
 mysql_pfs_key_t	log_cmdq_mutex_key;
 mysql_pfs_key_t	log_flush_order_mutex_key;
 mysql_pfs_key_t	mutex_list_mutex_key;