diff --git a/device-api/src/topology/hwloc.rs b/device-api/src/topology/hwloc.rs
index 59ba7f4..57b7196 100644
--- a/device-api/src/topology/hwloc.rs
+++ b/device-api/src/topology/hwloc.rs
@@ -5,16 +5,12 @@ use crate::topology::helper;
 use crate::{DeviceError, DeviceResult};
 
 pub trait Hwloc {
-    unsafe fn init_topology(&mut self) -> DeviceResult<()>;
-    unsafe fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()>;
-    unsafe fn load_topology(&mut self) -> DeviceResult<()>;
-    unsafe fn set_topology_from_xml(&mut self, xml_path: &str) -> DeviceResult<()>;
-    unsafe fn get_common_ancestor_obj(
-        &self,
-        dev1bdf: &str,
-        dev2bdf: &str,
-    ) -> DeviceResult<hwloc_obj_t>;
-    unsafe fn destroy_topology(&mut self);
+    fn init_topology(&mut self) -> DeviceResult<()>;
+    fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()>;
+    fn load_topology(&mut self) -> DeviceResult<()>;
+    fn set_topology_from_xml(&mut self, xml_path: &str) -> DeviceResult<()>;
+    fn get_common_ancestor_obj(&self, dev1bdf: &str, dev2bdf: &str) -> DeviceResult<hwloc_obj_t>;
+    fn destroy_topology(&mut self);
 }
 
 pub struct HwlocTopology {
@@ -30,8 +26,8 @@ impl HwlocTopology {
 }
 
 impl Hwloc for HwlocTopology {
-    unsafe fn init_topology(&mut self) -> DeviceResult<()> {
-        {
+    fn init_topology(&mut self) -> DeviceResult<()> {
+        unsafe {
             if hwloc_topology_init(&mut self.topology) == 0 {
                 Ok(())
             } else {
@@ -42,8 +38,8 @@ impl Hwloc for HwlocTopology {
         }
     }
 
-    unsafe fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()> {
-        {
+    fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()> {
+        unsafe {
             if hwloc_topology_set_io_types_filter(self.topology, filter) == 0 {
                 Ok(())
             } else {
@@ -52,8 +48,8 @@ impl Hwloc for HwlocTopology {
         }
     }
 
-    unsafe fn load_topology(&mut self) -> DeviceResult<()> {
-        {
+    fn load_topology(&mut self) -> DeviceResult<()> {
+        unsafe {
             if hwloc_topology_load(self.topology) == 0 {
                 Ok(())
             } else {
@@ -62,8 +58,8 @@ impl Hwloc for HwlocTopology {
         }
     }
 
-    unsafe fn set_topology_from_xml(&mut self, xmlpath: &str) -> DeviceResult<()> {
-        {
+    fn set_topology_from_xml(&mut self, xmlpath: &str) -> DeviceResult<()> {
+        unsafe {
             let xml_path_cstr = CString::new(xmlpath).unwrap();
             if hwloc_topology_set_xml(self.topology, xml_path_cstr.as_ptr()) == 0 {
                 Ok(())
@@ -73,12 +69,8 @@ impl Hwloc for HwlocTopology {
         }
     }
 
-    unsafe fn get_common_ancestor_obj(
-        &self,
-        dev1bdf: &str,
-        dev2bdf: &str,
-    ) -> DeviceResult<hwloc_obj_t> {
-        {
+    fn get_common_ancestor_obj(&self, dev1bdf: &str, dev2bdf: &str) -> DeviceResult<hwloc_obj_t> {
+        unsafe {
             let dev1_obj = helper::hwloc_get_pcidev_by_busidstring(self.topology, dev1bdf);
             if dev1_obj.is_null() {
                 return Err(DeviceError::hwloc_error(format!(
@@ -104,8 +96,8 @@ impl Hwloc for HwlocTopology {
         }
     }
 
-    unsafe fn destroy_topology(&mut self) {
-        {
+    fn destroy_topology(&mut self) {
+        unsafe {
             if !self.topology.is_null() {
                 hwloc_topology_destroy(self.topology);
                 self.topology = std::ptr::null_mut();
diff --git a/device-api/src/topology/mod.rs b/device-api/src/topology/mod.rs
index 60f968e..783d86c 100644
--- a/device-api/src/topology/mod.rs
+++ b/device-api/src/topology/mod.rs
@@ -161,15 +161,15 @@ mod tests {
     }
 
     impl Hwloc for HwlocTopologyMock {
-        unsafe fn init_topology(&mut self) -> DeviceResult<()> {
+        fn init_topology(&mut self) -> DeviceResult<()> {
             self.hwloc_topology.init_topology()
         }
 
-        unsafe fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()> {
+        fn set_io_types_filter(&mut self, filter: hwloc_type_filter_e) -> DeviceResult<()> {
             self.hwloc_topology.set_io_types_filter(filter)
         }
 
-        unsafe fn load_topology(&mut self) -> DeviceResult<()> {
+        fn load_topology(&mut self) -> DeviceResult<()> {
             let current_dir = env::current_dir().unwrap();
             let xml_path = current_dir.join("src/topology/test.xml");
             self.hwloc_topology
@@ -177,11 +177,11 @@ mod tests {
             self.hwloc_topology.load_topology()
         }
 
-        unsafe fn set_topology_from_xml(&mut self, xml_path: &str) -> DeviceResult<()> {
+        fn set_topology_from_xml(&mut self, xml_path: &str) -> DeviceResult<()> {
             self.hwloc_topology.set_topology_from_xml(xml_path)
         }
 
-        unsafe fn get_common_ancestor_obj(
+        fn get_common_ancestor_obj(
             &self,
             dev1bdf: &str,
             dev2bdf: &str,
@@ -190,7 +190,7 @@ mod tests {
                 .get_common_ancestor_obj(dev1bdf, dev2bdf)
         }
 
-        unsafe fn destroy_topology(&mut self) {
+        fn destroy_topology(&mut self) {
             self.hwloc_topology.destroy_topology()
         }
     }