diff --git a/src/mem/qos/mem_ctrl.cc b/src/mem/qos/mem_ctrl.cc
index 5bb031c9ed..9bf13280da 100644
--- a/src/mem/qos/mem_ctrl.cc
+++ b/src/mem/qos/mem_ctrl.cc
@@ -48,7 +48,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/mem_ctrl.hh b/src/mem/qos/mem_ctrl.hh
index 11e787d484..359e2858be 100644
--- a/src/mem/qos/mem_ctrl.hh
+++ b/src/mem/qos/mem_ctrl.hh
@@ -64,7 +64,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/mem_sink.cc b/src/mem/qos/mem_sink.cc
index 2dec5d574a..3ffe7f4d61 100644
--- a/src/mem/qos/mem_sink.cc
+++ b/src/mem/qos/mem_sink.cc
@@ -50,7 +50,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/mem_sink.hh b/src/mem/qos/mem_sink.hh
index a2e975a483..d2310c65fe 100644
--- a/src/mem/qos/mem_sink.hh
+++ b/src/mem/qos/mem_sink.hh
@@ -59,7 +59,6 @@ struct QoSMemSinkInterfaceParams;
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy.cc b/src/mem/qos/policy.cc
index 6d41e7d452..5ca7eae6b6 100644
--- a/src/mem/qos/policy.cc
+++ b/src/mem/qos/policy.cc
@@ -45,7 +45,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy.hh b/src/mem/qos/policy.hh
index a7e7666a86..c5bd2be91c 100644
--- a/src/mem/qos/policy.hh
+++ b/src/mem/qos/policy.hh
@@ -57,7 +57,6 @@ struct QoSPolicyParams;
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy_fixed_prio.cc b/src/mem/qos/policy_fixed_prio.cc
index 140817e55f..f64aae9aaf 100644
--- a/src/mem/qos/policy_fixed_prio.cc
+++ b/src/mem/qos/policy_fixed_prio.cc
@@ -51,7 +51,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy_fixed_prio.hh b/src/mem/qos/policy_fixed_prio.hh
index 77e7a2515e..18ff6ac8d9 100644
--- a/src/mem/qos/policy_fixed_prio.hh
+++ b/src/mem/qos/policy_fixed_prio.hh
@@ -52,7 +52,6 @@ struct QoSFixedPriorityPolicyParams;
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy_pf.cc b/src/mem/qos/policy_pf.cc
index ae15045857..adbcdb448c 100644
--- a/src/mem/qos/policy_pf.cc
+++ b/src/mem/qos/policy_pf.cc
@@ -48,7 +48,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/policy_pf.hh b/src/mem/qos/policy_pf.hh
index acc2a4a6a6..4c215e54c6 100644
--- a/src/mem/qos/policy_pf.hh
+++ b/src/mem/qos/policy_pf.hh
@@ -52,7 +52,6 @@ struct QoSPropFairPolicyParams;
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/q_policy.cc b/src/mem/qos/q_policy.cc
index de2e31660e..a6d13feb7e 100644
--- a/src/mem/qos/q_policy.cc
+++ b/src/mem/qos/q_policy.cc
@@ -52,7 +52,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/q_policy.hh b/src/mem/qos/q_policy.hh
index 7af52b6d34..fc9200d0af 100644
--- a/src/mem/qos/q_policy.hh
+++ b/src/mem/qos/q_policy.hh
@@ -53,7 +53,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/turnaround_policy.hh b/src/mem/qos/turnaround_policy.hh
index 2d5696f60d..9bbb446a12 100644
--- a/src/mem/qos/turnaround_policy.hh
+++ b/src/mem/qos/turnaround_policy.hh
@@ -49,7 +49,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/turnaround_policy_ideal.cc b/src/mem/qos/turnaround_policy_ideal.cc
index c67e40b2c6..8d3d7d0b11 100644
--- a/src/mem/qos/turnaround_policy_ideal.cc
+++ b/src/mem/qos/turnaround_policy_ideal.cc
@@ -48,7 +48,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {
 
diff --git a/src/mem/qos/turnaround_policy_ideal.hh b/src/mem/qos/turnaround_policy_ideal.hh
index 0a75f79bf8..de416c475c 100644
--- a/src/mem/qos/turnaround_policy_ideal.hh
+++ b/src/mem/qos/turnaround_policy_ideal.hh
@@ -47,7 +47,6 @@ namespace gem5
 namespace memory
 {
 
-GEM5_DEPRECATED_NAMESPACE(QoS, qos);
 namespace qos
 {