diff --git a/core/mem_region.c b/core/mem_region.c
index a3145583cd76..a8a92ff21171 100644
--- a/core/mem_region.c
+++ b/core/mem_region.c
@@ -756,13 +756,13 @@ static bool add_region(struct mem_region *region)
 	return true;
 }
 
-void mem_reserve_hw(const char *name, uint64_t start, uint64_t len)
+void mem_reserve_fw(const char *name, uint64_t start, uint64_t len)
 {
 	struct mem_region *region;
 	bool added = true;
 
 	lock(&mem_region_lock);
-	region = new_region(name, start, len, NULL, REGION_HW_RESERVED);
+	region = new_region(name, start, len, NULL, REGION_FW_RESERVED);
 	assert(region);
 
 	if (!mem_region_init_done)
@@ -935,7 +935,7 @@ static void mem_region_parse_reserved_properties(void)
 			region = new_region(name,
 					dt_get_number(range, 2),
 					dt_get_number(range + 1, 2),
-					NULL, REGION_HW_RESERVED);
+					NULL, REGION_FW_RESERVED);
 			add_region(region);
 		}
 	} else if (names || ranges) {
@@ -974,7 +974,7 @@ static bool mem_region_parse_reserved_nodes(const char *path)
 		region = new_region(strdup(node->name),
 				dt_get_number(reg->prop, 2),
 				dt_get_number(reg->prop + sizeof(u64), 2),
-				node, REGION_HW_RESERVED);
+				node, REGION_FW_RESERVED);
 		add_region(region);
 	}
 
@@ -1151,7 +1151,7 @@ static void mem_region_add_dt_reserved_node(struct dt_node *parent,
 	 * update regions' device-tree nodes, and we want those updates to
 	 * apply to the nodes in /reserved-memory/.
 	 */
-	if (region->type == REGION_HW_RESERVED && region->node) {
+	if (region->type == REGION_FW_RESERVED && region->node) {
 		if (region->node->parent != parent)
 			region->node = dt_copy(region->node, parent);
 		return;
diff --git a/core/test/run-mem_range_is_reserved.c b/core/test/run-mem_range_is_reserved.c
index 0efe9b921cf4..95c790dca53b 100644
--- a/core/test/run-mem_range_is_reserved.c
+++ b/core/test/run-mem_range_is_reserved.c
@@ -165,7 +165,7 @@ static void run_test(struct test *test)
 
 	/* create our reservations */
 	for (r = test->regions; r->start; r++)
-		mem_reserve_hw("r", r->start, r->end - r->start);
+		mem_reserve_fw("r", r->start, r->end - r->start);
 
 	reserved = mem_range_is_reserved(0x1000, 0x1000);
 
diff --git a/core/test/run-mem_region_reservations.c b/core/test/run-mem_region_reservations.c
index 8764953290e7..584b7c340f41 100644
--- a/core/test/run-mem_region_reservations.c
+++ b/core/test/run-mem_region_reservations.c
@@ -205,14 +205,14 @@ int main(void)
 
 	/* add pre-init reservations */
 	for (i = 0; i < ARRAY_SIZE(test_regions); i++)
-		mem_reserve_hw(test_regions[i].name,
+		mem_reserve_fw(test_regions[i].name,
 				test_regions[i].addr, 0x1000);
 
 	/* Now convert. */
 	mem_region_init();
 
 	/* add a post-init reservation */
-	mem_reserve_hw("test.4", 0x5000, 0x1000);
+	mem_reserve_fw("test.4", 0x5000, 0x1000);
 
 	/* release unused */
 	mem_region_release_unused();
diff --git a/hdata/memory.c b/hdata/memory.c
index 0c6c0811f61a..46ad4f7de625 100644
--- a/hdata/memory.c
+++ b/hdata/memory.c
@@ -470,7 +470,7 @@ static void get_hb_reserved_mem(struct HDIF_common_hdr *ms_vpd)
 		prlog(PR_DEBUG, "MEM: Reserve '%s' %#" PRIx64 "-%#" PRIx64 " (type/inst=0x%08x)\n",
 		      label, start_addr, end_addr, be32_to_cpu(hb_resv_mem->type_instance));
 
-		mem_reserve_hw(label, start_addr, end_addr - start_addr + 1);
+		mem_reserve_fw(label, start_addr, end_addr - start_addr + 1);
 	}
 }
 
diff --git a/hdata/test/stubs.c b/hdata/test/stubs.c
index 0777730f418c..e3b0fdf0be6f 100644
--- a/hdata/test/stubs.c
+++ b/hdata/test/stubs.c
@@ -99,7 +99,6 @@ STUB(op_display);
 STUB(fsp_preload_lid);
 STUB(fsp_wait_lid_loaded);
 STUB(fsp_adjust_lid_side);
-STUB(backtrace);
 
 /* Add HW specific stubs here */
 static void noop_function(void) {}
@@ -107,4 +106,4 @@ static void noop_function(void) {}
 	void fnname(void) __attribute__((weak, alias ("noop_function")))
 
 NOOP_STUB(early_uart_init);
-NOOP_STUB(mem_reserve_hw);
+NOOP_STUB(mem_reserve_fw);
diff --git a/hw/homer.c b/hw/homer.c
index 1e2298b12e59..b1bdba5ba103 100644
--- a/hw/homer.c
+++ b/hw/homer.c
@@ -116,7 +116,7 @@ static void homer_init_chip(struct proc_chip *chip)
 		if (!mem_range_is_reserved(hbase, hsize)) {
 			prlog(PR_WARNING,
 				"HOMER image is not reserved! Reserving\n");
-			mem_reserve_hw("ibm,homer-image", hbase, hsize);
+			mem_reserve_fw("ibm,homer-image", hbase, hsize);
 		}
 
 		chip->homer_base = hbase;
@@ -141,7 +141,7 @@ static void homer_init_chip(struct proc_chip *chip)
 				!mem_range_is_reserved(sbase, ssize)) {
 			prlog(PR_WARNING,
 				"SLW image is not reserved! Reserving\n");
-			mem_reserve_hw("ibm,slw-image", sbase, ssize);
+			mem_reserve_fw("ibm,slw-image", sbase, ssize);
 		}
 
 		chip->slw_base = sbase;
@@ -206,7 +206,7 @@ void homer_init(void)
 					chip->occ_common_size)) {
 			prlog(PR_WARNING,
 				"OCC common area is not reserved! Reserving\n");
-			mem_reserve_hw("ibm,occ-common-area",
+			mem_reserve_fw("ibm,occ-common-area",
 						chip->occ_common_base,
 						chip->occ_common_size);
 		}
diff --git a/hw/prd.c b/hw/prd.c
index 0db7e6bba365..01bbf966c958 100644
--- a/hw/prd.c
+++ b/hw/prd.c
@@ -397,7 +397,7 @@ void prd_register_reserved_memory(void)
 	for (region = mem_region_next(NULL); region;
 			region = mem_region_next(region)) {
 
-		if (region->type != REGION_HW_RESERVED)
+		if (region->type != REGION_FW_RESERVED)
 			continue;
 
 		if (!region->node)
diff --git a/include/mem_region.h b/include/mem_region.h
index c34858e4eb9d..8a6bf4079d0c 100644
--- a/include/mem_region.h
+++ b/include/mem_region.h
@@ -32,7 +32,7 @@ enum mem_region_type {
 	REGION_SKIBOOT_FIRMWARE,
 
 	/* ranges reserved before skiboot init, eg HBRT memory */
-	REGION_HW_RESERVED,
+	REGION_FW_RESERVED,
 
 	/* ranges reserved, eg HW framebuffer */
 	REGION_RESERVED,
@@ -73,7 +73,7 @@ void adjust_cpu_stacks_alloc(void);
 void mem_region_add_dt_reserved(void);
 
 /* Mark memory as reserved */
-void mem_reserve_hw(const char *name, uint64_t start, uint64_t len);
+void mem_reserve_fw(const char *name, uint64_t start, uint64_t len);
 
 struct mem_region *find_mem_region(const char *name);