MDEV-32920 innodb_buffer_pool_read_requests always 0

srv_export_innodb_status(): Update
export_vars.innodb_buffer_pool_read_requests
with buf_pool.stat.n_page_gets. This is caused due
to incorrect merge commit 44c9008b

mysql-test/suite/innodb/r/innodb_force_recovery.result

@@ -4,9 +4,18 @@ insert into t1 values(1, 2);
 insert into t2 values(1, 2);
 SET GLOBAL innodb_fast_shutdown = 0;
 # restart: --innodb-force-recovery=4
+SELECT CAST(variable_value AS INTEGER) INTO @read1
+FROM INFORMATION_SCHEMA.GLOBAL_STATUS
+WHERE VARIABLE_NAME='innodb_buffer_pool_read_requests';
 select * from t1;
 f1	f2
 1	2
+SELECT CAST(variable_value AS INTEGER) INTO @read2
+FROM INFORMATION_SCHEMA.GLOBAL_STATUS
+WHERE VARIABLE_NAME='innodb_buffer_pool_read_requests';
+SELECT @read1>0, @read2>@read1;
+@read1>0	@read2>@read1
+1	1
 begin;
 insert into t1 values(2, 3);
 rollback;

mysql-test/suite/innodb/t/innodb_force_recovery.test

@@ -21,8 +21,18 @@ SET GLOBAL innodb_fast_shutdown = 0;
 --source include/restart_mysqld.inc
 let $status=`SHOW ENGINE INNODB STATUS`;
 
+SELECT CAST(variable_value AS INTEGER) INTO @read1
+FROM INFORMATION_SCHEMA.GLOBAL_STATUS
+WHERE VARIABLE_NAME='innodb_buffer_pool_read_requests';
+
 select * from t1;
 
+SELECT CAST(variable_value AS INTEGER) INTO @read2
+FROM INFORMATION_SCHEMA.GLOBAL_STATUS
+WHERE VARIABLE_NAME='innodb_buffer_pool_read_requests';
+
+SELECT @read1>0, @read2>@read1;
+
 begin;
 insert into t1 values(2, 3);
 rollback;

storage/innobase/srv/srv0srv.cc

@@ -901,6 +901,9 @@ srv_export_innodb_status(void)
 	export_vars.innodb_data_written = srv_stats.data_written
 		+ (dblwr << srv_page_size_shift);
 
+	export_vars.innodb_buffer_pool_read_requests
+		= buf_pool.stat.n_page_gets;
+
 	export_vars.innodb_buffer_pool_bytes_data =
 		buf_pool.stat.LRU_bytes
 		+ (UT_LIST_GET_LEN(buf_pool.unzip_LRU)