diff --git a/build.sh b/build.sh
index 8af2bb04..ef4000a3 100755
--- a/build.sh
+++ b/build.sh
@@ -437,8 +437,13 @@ fi
 #fi
 #echo "Done"
 
+if [ -f target/linux/generic/backport-5.4/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch ]; then
+	rm -f target/linux/generic/backport-5.4/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
+fi
+
 if [ "$OMR_KERNEL" = "5.4" ]; then
 	echo "Set to kernel 5.4 for rpi arch"
+	find target/linux/bcm27xx -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER=5.10%KERNEL_PATCHVER:=5.4%g' {} \;
 	find target/linux/bcm27xx -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER:=5.10%KERNEL_PATCHVER:=5.4%g' {} \;
 	echo "Done"
 	echo "Set to kernel 5.4 for x86 arch"
@@ -456,13 +461,13 @@ if [ "$OMR_KERNEL" = "5.10" ]; then
 	find target/linux/bcm27xx -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER:=5.4%KERNEL_PATCHVER:=5.10%g' {} \;
 	find target/linux/bcm27xx -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER=5.4%KERNEL_PATCHVER:=5.10%g' {} \;
 	echo "Done"
-	echo "Set to kernel 5.14 for x86 arch"
+	echo "Set to kernel 5.10 for x86 arch"
 	find target/linux/x86 -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER:=5.4%KERNEL_PATCHVER:=5.10%g' {} \;
 	echo "Done"
-	echo "Set to kernel 5.14 for mvebu arch (WRT)"
+	echo "Set to kernel 5.10 for mvebu arch (WRT)"
 	find target/linux/mvebu -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER:=5.4%KERNEL_PATCHVER:=5.10%g' {} \;
 	echo "Done"
-	echo "Set to kernel 5.14 for mediatek arch (BPI-R2)"
+	echo "Set to kernel 5.10 for mediatek arch (BPI-R2)"
 	find target/linux/mediatek -type f -name Makefile -exec sed -i 's%KERNEL_PATCHVER:=5.4%KERNEL_PATCHVER:=5.10%g' {} \;
 	echo "Done"
 fi
@@ -533,7 +538,7 @@ if [ ! -f "../../$OMR_TARGET_CONFIG" ]; then
 	exit 1
 fi
 
-echo "Building $OMR_DIST for the target $OMR_TARGET"
+echo "Building $OMR_DIST for the target $OMR_TARGET with kernel $OMR_KERNEL"
 make defconfig
 make IGNORE_ERRORS=m "$@"
 echo "Done"
\ No newline at end of file
diff --git a/root/target/linux/generic/hack-5.4/998-ndpi-netfilter.patch b/root/target/linux/generic/hack-5.4/998-ndpi-netfilter.patch
deleted file mode 100644
index cd8d61a7..00000000
--- a/root/target/linux/generic/hack-5.4/998-ndpi-netfilter.patch
+++ /dev/null
@@ -1,116 +0,0 @@
-diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h
-index 21f887c..59980ec 100644
---- a/include/net/netfilter/nf_conntrack_extend.h
-+++ b/include/net/netfilter/nf_conntrack_extend.h
-@@ -28,7 +28,8 @@ enum nf_ct_ext_id {
- #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
- 	NF_CT_EXT_SYNPROXY,
- #endif
--	NF_CT_EXT_NUM,
-+	NF_CT_EXT_CUSTOM,
-+	NF_CT_EXT_NUM=NF_CT_EXT_CUSTOM+CONFIG_NF_CONNTRACK_CUSTOM,
- };
- 
- #define NF_CT_EXT_HELPER_TYPE struct nf_conn_help
-@@ -96,5 +97,6 @@ struct nf_ct_ext_type {
- };
- 
- int nf_ct_extend_register(const struct nf_ct_ext_type *type);
-+int nf_ct_extend_custom_register(struct nf_ct_ext_type *type,unsigned long int cid);
- void nf_ct_extend_unregister(const struct nf_ct_ext_type *type);
- #endif /* _NF_CONNTRACK_EXTEND_H */
-diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
-index 7581e82..30a11eb 100644
---- a/net/netfilter/Kconfig
-+++ b/net/netfilter/Kconfig
-@@ -85,6 +85,16 @@ config NF_CONNTRACK_SECMARK
- 
- 	  If unsure, say 'N'.
- 
-+config NF_CONNTRACK_CUSTOM
-+	int "Number of custom extend"
-+	range 0 8
-+	depends on NETFILTER_ADVANCED
-+	default "2"
-+	help
-+	  This parameter specifies how many custom extensions can be registered.
-+
-+	  The default value is 2.
-+
- config NF_CONNTRACK_ZONES
- 	bool  'Connection tracking zones'
- 	depends on NETFILTER_ADVANCED
-diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
-index 85f643c..44e2fdd 100644
---- a/net/netfilter/nf_conntrack_core.c
-+++ b/net/netfilter/nf_conntrack_core.c
-@@ -1971,7 +1971,7 @@ int nf_conntrack_set_hashsize(const char *val, const struct kernel_param *kp)
- static __always_inline unsigned int total_extension_size(void)
- {
- 	/* remember to add new extensions below */
--	BUILD_BUG_ON(NF_CT_EXT_NUM > 9);
-+	BUILD_BUG_ON(NF_CT_EXT_NUM > 12);
- 
- 	return sizeof(struct nf_ct_ext) +
- 	       sizeof(struct nf_conn_help)
-diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
-index 9fe0ddc..5a9054e 100644
---- a/net/netfilter/nf_conntrack_extend.c
-+++ b/net/netfilter/nf_conntrack_extend.c
-@@ -108,11 +108,56 @@ int nf_ct_extend_register(const struct nf_ct_ext_type *type)
- }
- EXPORT_SYMBOL_GPL(nf_ct_extend_register);
- 
-+static unsigned long int nf_ct_ext_cust_id[CONFIG_NF_CONNTRACK_CUSTOM];
-+static enum nf_ct_ext_id 
-+nf_ct_extend_get_custom_id(unsigned long int ext_id);
-+
-+int nf_ct_extend_custom_register(struct nf_ct_ext_type *type,
-+				 unsigned long int cid)
-+{
-+	int ret;
-+	enum nf_ct_ext_id new_id = nf_ct_extend_get_custom_id(cid);
-+	if(!new_id)
-+		return -EBUSY;
-+	type->id = new_id;
-+	ret = nf_ct_extend_register(type);
-+	if(ret < 0) {
-+		mutex_lock(&nf_ct_ext_type_mutex);
-+		nf_ct_ext_cust_id[new_id - NF_CT_EXT_CUSTOM] = 0;
-+		mutex_unlock(&nf_ct_ext_type_mutex);
-+	}
-+	return ret;
-+}
-+EXPORT_SYMBOL_GPL(nf_ct_extend_custom_register);
-+
-+static enum nf_ct_ext_id 
-+nf_ct_extend_get_custom_id(unsigned long int ext_id)
-+{
-+	enum nf_ct_ext_id ret = 0;
-+	int i;
-+	mutex_lock(&nf_ct_ext_type_mutex);
-+	for(i = 0; i < CONFIG_NF_CONNTRACK_CUSTOM; i++) {
-+		if(!nf_ct_ext_cust_id[i]) {
-+			nf_ct_ext_cust_id[i] = ext_id;
-+			ret = i+NF_CT_EXT_CUSTOM;
-+			break;
-+		}
-+		if(nf_ct_ext_cust_id[i] == ext_id) {
-+			ret = i+NF_CT_EXT_CUSTOM;
-+			break;
-+		}
-+	}
-+	mutex_unlock(&nf_ct_ext_type_mutex);
-+	return ret;
-+}
-+
- /* This MUST be called in process context. */
- void nf_ct_extend_unregister(const struct nf_ct_ext_type *type)
- {
- 	mutex_lock(&nf_ct_ext_type_mutex);
- 	RCU_INIT_POINTER(nf_ct_ext_types[type->id], NULL);
-+	if(type->id >= NF_CT_EXT_CUSTOM && type->id < NF_CT_EXT_NUM)
-+		nf_ct_ext_cust_id[type->id-NF_CT_EXT_CUSTOM] = 0;
- 	mutex_unlock(&nf_ct_ext_type_mutex);
- 	synchronize_rcu();
- }