WL#7436: Deprecate and remove timed_mutexes system variable

This is the 5.7 version of the patch.

Remove the timed_mutexes system variable.

Author: jhauglid

include/my_sys.h

@@ -265,8 +265,6 @@ extern my_bool  my_disable_locking, my_disable_async_io,
 extern char	wild_many,wild_one,wild_prefix;
 extern const char *charsets_dir;
 
-extern my_bool timed_mutexes;
-
 enum cache_type
 {
   TYPE_NOT_SET= 0, READ_CACHE, WRITE_CACHE,

mysql-test/r/mysqld--help-notwin.result

@@ -1028,8 +1028,6 @@ The following options may be given as the first argument:
  one-thread-per-connection, no-threads, loaded-dynamically
  --thread-stack=#    The stack size for each thread
  --time-format=name  The TIME format (ignored)
- --timed-mutexes     Specify whether to time mutexes (only InnoDB mutexes are
- currently supported)
  --tmp-table-size=#  If an internal in-memory temporary table exceeds this
  size, MySQL will automatically convert it to an on-disk
  MyISAM table
@@ -1362,7 +1360,6 @@ thread-cache-size 9
 thread-handling one-thread-per-connection
 thread-stack 262144
 time-format %H:%i:%s
-timed-mutexes FALSE
 tmp-table-size 16777216
 transaction-alloc-block-size 8192
 transaction-isolation REPEATABLE-READ

mysql-test/r/mysqld--help-win.result

@@ -1036,8 +1036,6 @@ The following options may be given as the first argument:
  one-thread-per-connection, no-threads, loaded-dynamically
  --thread-stack=#    The stack size for each thread
  --time-format=name  The TIME format (ignored)
- --timed-mutexes     Specify whether to time mutexes (only InnoDB mutexes are
- currently supported)
  --tmp-table-size=#  If an internal in-memory temporary table exceeds this
  size, MySQL will automatically convert it to an on-disk
  MyISAM table
@@ -1373,7 +1371,6 @@ thread-cache-size 9
 thread-handling one-thread-per-connection
 thread-stack 262144
 time-format %H:%i:%s
-timed-mutexes FALSE
 tmp-table-size 16777216
 transaction-alloc-block-size 8192
 transaction-isolation REPEATABLE-READ

mysql-test/r/variables.result

@@ -198,20 +198,6 @@ set global concurrent_insert=DEFAULT;
 select @@concurrent_insert;
 @@concurrent_insert
 AUTO
-set global timed_mutexes=ON;
-show variables like 'timed_mutexes';
-Variable_name	Value
-timed_mutexes	ON
-select * from information_schema.session_variables where variable_name like 'timed_mutexes';
-VARIABLE_NAME	VARIABLE_VALUE
-TIMED_MUTEXES	ON
-set global timed_mutexes=0;
-show variables like 'timed_mutexes';
-Variable_name	Value
-timed_mutexes	OFF
-select * from information_schema.session_variables where variable_name like 'timed_mutexes';
-VARIABLE_NAME	VARIABLE_VALUE
-TIMED_MUTEXES	OFF
 set default_storage_engine=MYISAM, default_storage_engine="HEAP", global default_storage_engine="MERGE";
 show local variables like 'default_storage_engine';
 Variable_name	Value

mysql-test/suite/sys_vars/r/timed_mutexes_basic.result

@@ -130,13 +130,6 @@ select * from information_schema.session_variables where variable_name like 'con
 set global concurrent_insert=DEFAULT;
 select @@concurrent_insert;
 
-set global timed_mutexes=ON;
-show variables like 'timed_mutexes';
-select * from information_schema.session_variables where variable_name like 'timed_mutexes';
-set global timed_mutexes=0;
-show variables like 'timed_mutexes';
-select * from information_schema.session_variables where variable_name like 'timed_mutexes';
-
 set default_storage_engine=MYISAM, default_storage_engine="HEAP", global default_storage_engine="MERGE";
 show local variables like 'default_storage_engine';
 select * from information_schema.session_variables where variable_name like 'default_storage_engine';

mysql-test/suite/sys_vars/t/timed_mutexes_basic.test

@@ -51,8 +51,6 @@ PSI_memory_key key_memory_win_PACL;
 PSI_memory_key key_memory_win_IP_ADAPTER_ADDRESSES;
 #endif /* _WIN32 */
 
-my_bool timed_mutexes= 0;
-
 	/* from my_init */
 char *	home_dir=0;
 const char      *my_progname=0;

mysql-test/t/variables.test

@@ -3349,12 +3349,6 @@ static Sys_var_ulonglong Sys_tmp_table_size(
        VALID_RANGE(1024, (ulonglong)~(intptr)0), DEFAULT(16*1024*1024),
        BLOCK_SIZE(1));
 
-static Sys_var_mybool Sys_timed_mutexes(
-       "timed_mutexes",
-       "Specify whether to time mutexes (only InnoDB mutexes are currently "
-       "supported)",
-       GLOBAL_VAR(timed_mutexes), CMD_LINE(OPT_ARG), DEFAULT(0));
-
 static char *server_version_ptr;
 static Sys_var_charptr Sys_version(
        "version", "Server version",