diff --git a/sys/net/pfil.c b/sys/net/pfil.c
index 1e2629263ec..0ae889a6f27 100644
--- a/sys/net/pfil.c
+++ b/sys/net/pfil.c
@@ -85,14 +85,13 @@ pfil_run_hooks(struct pfil_head *ph, struct mbuf **mp, struct ifnet *ifp,
 		}
 	}
 	PFIL_RUNLOCK(ph, &rmpt);
-	
 	*mp = m;
 	return (rv);
 }
 
 /*
- * pfil_head_register() registers a pfil_head with the packet filter
- * hook mechanism.
+ * pfil_head_register() registers a pfil_head with the packet filter hook
+ * mechanism.
  */
 int
 pfil_head_register(struct pfil_head *ph)
@@ -104,7 +103,7 @@ pfil_head_register(struct pfil_head *ph)
 		if (ph->ph_type == lph->ph_type &&
 		    ph->ph_un.phu_val == lph->ph_un.phu_val) {
 			PFIL_LIST_UNLOCK();
-			return EEXIST;
+			return (EEXIST);
 		}
 	}
 	PFIL_LOCK_INIT(ph);
@@ -150,7 +149,6 @@ pfil_head_get(int type, u_long val)
 		if (ph->ph_type == type && ph->ph_un.phu_val == val)
 			break;
 	PFIL_LIST_UNLOCK();
-	
 	return (ph);
 }
 
@@ -207,7 +205,7 @@ pfil_add_hook(int (*func)(void *, struct mbuf **, struct ifnet *, int,
 		ph->ph_nhooks++;
 	}
 	PFIL_WUNLOCK(ph);
-	return 0;
+	return (0);
 locked_error:
 	PFIL_WUNLOCK(ph);
 error:
@@ -215,12 +213,12 @@ error:
 		free(pfh1, M_IFADDR);
 	if (pfh2 != NULL)
 		free(pfh2, M_IFADDR);
-	return err;
+	return (err);
 }
 
 /*
- * pfil_remove_hook removes a specific function from the packet filter
- * hook list.
+ * pfil_remove_hook removes a specific function from the packet filter hook
+ * list.
  */
 int
 pfil_remove_hook(int (*func)(void *, struct mbuf **, struct ifnet *, int,
@@ -229,7 +227,6 @@ pfil_remove_hook(int (*func)(void *, struct mbuf **, struct ifnet *, int,
 	int err = 0;
 
 	PFIL_WLOCK(ph);
-
 	if (flags & PFIL_IN) {
 		err = pfil_list_remove(&ph->ph_in, func, arg);
 		if (err == 0)
@@ -241,8 +238,7 @@ pfil_remove_hook(int (*func)(void *, struct mbuf **, struct ifnet *, int,
 			ph->ph_nhooks--;
 	}
 	PFIL_WUNLOCK(ph);
-	
-	return err;
+	return (err);
 }
 
 static int
@@ -256,17 +252,17 @@ pfil_list_add(pfil_list_t *list, struct packet_filter_hook *pfh1, int flags)
 	TAILQ_FOREACH(pfh, list, pfil_link)
 		if (pfh->pfil_func == pfh1->pfil_func &&
 		    pfh->pfil_arg == pfh1->pfil_arg)
-			return EEXIST;
+			return (EEXIST);
+
 	/*
-	 * insert the input list in reverse order of the output list
-	 * so that the same path is followed in or out of the kernel.
+	 * Insert the input list in reverse order of the output list so that
+	 * the same path is followed in or out of the kernel.
 	 */
 	if (flags & PFIL_IN)
 		TAILQ_INSERT_HEAD(list, pfh1, pfil_link);
 	else
 		TAILQ_INSERT_TAIL(list, pfh1, pfil_link);
-
-	return 0;
+	return (0);
 }
 
 /*
@@ -284,7 +280,7 @@ pfil_list_remove(pfil_list_t *list,
 		if (pfh->pfil_func == func && pfh->pfil_arg == arg) {
 			TAILQ_REMOVE(list, pfh, pfil_link);
 			free(pfh, M_IFADDR);
-			return 0;
+			return (0);
 		}
-	return ENOENT;
+	return (ENOENT);
 }