Index: uspace/srv/devman/drv_conn.c
===================================================================
--- uspace/srv/devman/drv_conn.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/devman/drv_conn.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -161,5 +161,5 @@
  *
  * @param match_ids	The list of the device's match ids.
- * @return		Zero on success, negative error code otherwise.
+ * @return		Zero on success, error code otherwise.
  */
 static int devman_receive_match_id(match_id_list_t *match_ids)
@@ -211,5 +211,5 @@
  * @param match_count	The number of device's match ids to be received.
  * @param match_ids	The list of the device's match ids.
- * @return		Zero on success, negative error code otherwise.
+ * @return		Zero on success, error code otherwise.
  */
 static int devman_receive_match_ids(sysarg_t match_count,
Index: uspace/srv/fs/exfat/exfat_fat.c
===================================================================
--- uspace/srv/fs/exfat/exfat_fat.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/exfat/exfat_fat.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -71,5 +71,5 @@
  * @param max_clusters	Maximum number of clusters to visit.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -120,5 +120,5 @@
  * @param flags		Flags passed to libblock.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -184,5 +184,5 @@
  * @param flags		Flags passed to libblock.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -227,5 +227,5 @@
  * @param value		Output argument holding the value of the cluster.
  *
- * @return		EOK or a negative error code.
+ * @return		EOK or an error code.
  */
 int
@@ -257,5 +257,5 @@
  * @param value		Value to set the cluster with.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -295,5 +295,5 @@
  *			will be returned.
  *
- * @return		EOK on success, a negative error code otherwise.
+ * @return		EOK on success, an error code otherwise.
  */
 int
@@ -361,5 +361,5 @@
  * @param firstc	First cluster in the chain which is to be freed.
  *
- * @return		EOK on success or a negative return code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -394,5 +394,5 @@
  * @param lcl		Last cluster of the cluster chain to append.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -438,5 +438,5 @@
  *			be chopped off.
  *
- * @return		EOK on success or a negative return code.
+ * @return		EOK on success or an error code.
  */
 int exfat_chop_clusters(exfat_bs_t *bs, exfat_node_t *nodep, exfat_cluster_t lcl)
Index: uspace/srv/fs/fat/fat_fat.c
===================================================================
--- uspace/srv/fs/fat/fat_fat.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/fat/fat_fat.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -71,5 +71,5 @@
  * @param max_clusters	Maximum number of clusters to visit.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -121,5 +121,5 @@
  * @param flags		Flags passed to libblock.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -186,5 +186,5 @@
  * @param flags		Flags passed to libblock.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -235,5 +235,5 @@
  * @param pos		Position in the last node block.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -287,5 +287,5 @@
  * @param value		Output argument holding the value of the cluster.
  *
- * @return		EOK or a negative error code.
+ * @return		EOK or an error code.
  */
 static int
@@ -357,5 +357,5 @@
  * @param value		Output argument holding the value of the cluster.
  *
- * @return		EOK or a negative error code.
+ * @return		EOK or an error code.
  */
 static int
@@ -388,5 +388,5 @@
  * @param value		Output argument holding the value of the cluster.
  *
- * @return		EOK or a negative error code.
+ * @return		EOK or an error code.
  */
 static int
@@ -421,5 +421,5 @@
  * @param value		Output argument holding the value of the cluster.
  *
- * @return		EOK or a negative error code.
+ * @return		EOK or an error code.
  */
 int
@@ -449,5 +449,5 @@
  * @param value		Value to set the cluster with.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 static int
@@ -537,5 +537,5 @@
  * @param value		Value to set the cluster with.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 static int
@@ -570,5 +570,5 @@
  * @param value		Value to set the cluster with.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 static int
@@ -607,5 +607,5 @@
  * @param value		Value to set the cluster with.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -634,5 +634,5 @@
  * @param nclsts	Number of clusters in the lifo chain.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int fat_alloc_shadow_clusters(fat_bs_t *bs, service_id_t service_id,
@@ -671,5 +671,5 @@
  *			will be returned.
  *
- * @return		EOK on success, a negative error code otherwise.
+ * @return		EOK on success, an error code otherwise.
  */
 int
@@ -742,5 +742,5 @@
  * @param firstc	First cluster in the chain which is to be freed.
  *
- * @return		EOK on success or a negative return code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -780,5 +780,5 @@
  * @param lcl		Last cluster of the cluster chain to append.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int fat_append_clusters(fat_bs_t *bs, fat_node_t *nodep, fat_cluster_t mcl,
@@ -827,5 +827,5 @@
  *			be chopped off.
  *
- * @return		EOK on success or a negative return code.
+ * @return		EOK on success or an error code.
  */
 int fat_chop_clusters(fat_bs_t *bs, fat_node_t *nodep, fat_cluster_t lcl)
Index: uspace/srv/fs/mfs/mfs_balloc.c
===================================================================
--- uspace/srv/fs/mfs/mfs_balloc.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/mfs/mfs_balloc.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -54,5 +54,5 @@
  * 			the new inode will be saved.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -68,5 +68,5 @@
  * @param inum		Number of the inode to free.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -82,5 +82,5 @@
  * 			of the zone will be saved.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -105,5 +105,5 @@
  * @param zone		Index of the zone to free.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -132,5 +132,5 @@
  *                      will be stored.
  *
- * @return              EOK on success or a negative error code.
+ * @return              EOK on success or an error code.
  */
 int
@@ -146,5 +146,5 @@
  *                      will be stored.
  *
- * @return              EOK on success or a negative error code.
+ * @return              EOK on success or an error code.
  */
 
@@ -162,5 +162,5 @@
  *                      will be stores.
  *
- * @return              EOK on success or a negative error code.
+ * @return              EOK on success or an error code.
  */
 static int
@@ -226,5 +226,5 @@
  * 			BMAP_INODE if operating on the inode's bitmap.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 static int
@@ -293,5 +293,5 @@
  * 			BMAP_INODE if operating on the inode's bitmap.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 static int
Index: uspace/srv/fs/mfs/mfs_dentry.c
===================================================================
--- uspace/srv/fs/mfs/mfs_dentry.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/mfs/mfs_dentry.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -40,5 +40,5 @@
  * @param index		index of the dentry in the list.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -103,5 +103,5 @@
  * @param d_info The directory entry to write to disk.
  *
- * @return	 EOK on success or a negative error code.
+ * @return	 EOK on success or an error code.
  */
 int
@@ -154,5 +154,5 @@
  * @param d_name	Name of the directory entry to delete.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -195,5 +195,5 @@
  * @param d_inum	index of the inode that will be pointed by the new dentry.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
Index: uspace/srv/fs/mfs/mfs_inode.c
===================================================================
--- uspace/srv/fs/mfs/mfs_inode.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/mfs/mfs_inode.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -55,5 +55,5 @@
  * @param index		index of the inode to read.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -201,5 +201,5 @@
  * @param mnode		Pointer to the generic MINIX inode in memory.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
@@ -319,5 +319,5 @@
  * @param size_shrink	Number of bytes that will be subtracted to the inode.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
Index: uspace/srv/fs/mfs/mfs_rw.c
===================================================================
--- uspace/srv/fs/mfs/mfs_rw.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/mfs/mfs_rw.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -59,5 +59,5 @@
  * @param pos	Position in file.
  *
- * @return	EOK on success or a negative error code.
+ * @return	EOK on success or an error code.
  */
 int
@@ -236,5 +236,5 @@
  * @param new_size	The new size of the inode.
  *
- * @return		EOK on success or a negative error code.
+ * @return		EOK on success or an error code.
  */
 int
Index: uspace/srv/fs/udf/udf_file.c
===================================================================
--- uspace/srv/fs/udf/udf_file.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/udf/udf_file.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -54,5 +54,5 @@
  * @param pos      Position with which we read
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -90,5 +90,5 @@
  * @param len         Length of sequence
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -231,5 +231,5 @@
  * @param node    UDF node
  *
- * @return    EOK on success or a negative error code.
+ * @return    EOK on success or an error code.
  */
 int udf_read_icb(udf_node_t *node)
@@ -300,5 +300,5 @@
  * @param node UDF node
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -315,5 +315,5 @@
  * @param pos  Number of FID which we need to find
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -366,5 +366,5 @@
  * @param pos   Number of FID which we need to find
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -385,5 +385,5 @@
  * @param pos   Number of FID which we need to find
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -466,5 +466,5 @@
  * @param len   Length of buf
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -573,5 +573,5 @@
  * @param len      Length of data for reading
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
Index: uspace/srv/fs/udf/udf_idx.c
===================================================================
--- uspace/srv/fs/udf/udf_idx.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/udf/udf_idx.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -88,5 +88,5 @@
 /** Initialization of hash table
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -101,5 +101,5 @@
 /** Delete hash table
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -116,5 +116,5 @@
  * @param index    Absolute position of ICB (sector)
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -150,5 +150,5 @@
  * @param index    Absolute position of ICB (sector)
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -196,5 +196,5 @@
  * @param node UDF node
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
Index: uspace/srv/fs/udf/udf_volume.c
===================================================================
--- uspace/srv/fs/udf/udf_volume.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/fs/udf/udf_volume.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -81,5 +81,5 @@
  * @param vd         Returned value - Volume Descriptor.
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -98,5 +98,5 @@
  * @param service_id
  *
- * @return    EOK on success or a negative error code.
+ * @return    EOK on success or an error code.
  */
 int udf_volume_recongnition(service_id_t service_id) 
@@ -167,5 +167,5 @@
  * @param sector_size Expected sector size
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -204,5 +204,5 @@
  * @param avd        Returned value - Anchor Volume Descriptor
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -357,5 +357,5 @@
  * @param id       Index of partition in instance::partitions array
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -438,5 +438,5 @@
  * @param instance UDF instance
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
@@ -598,5 +598,5 @@
  * @param addr       UDF extent descriptor (ECMA 167 3/7.1)
  *
- * @return EOK on success or a negative error code.
+ * @return EOK on success or an error code.
  *
  */
Index: uspace/srv/net/tcp/service.c
===================================================================
--- uspace/srv/net/tcp/service.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/net/tcp/service.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -433,5 +433,5 @@
  * @param rconn_id Place to store ID of new connection
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_create_impl(tcp_client_t *client, inet_ep2_t *epp,
@@ -507,5 +507,5 @@
  * @param rlst_id Place to store ID of new listener
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
 */
 static int tcp_listener_create_impl(tcp_client_t *client, inet_ep_t *ep,
@@ -578,5 +578,5 @@
  * @param conn_id Connection ID
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_send_fin_impl(tcp_client_t *client, sysarg_t conn_id)
@@ -603,5 +603,5 @@
  * @param conn_id Connection ID
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_push_impl(tcp_client_t *client, sysarg_t conn_id)
@@ -628,5 +628,5 @@
  * @param conn_id Connection ID
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_reset_impl(tcp_client_t *client, sysarg_t conn_id)
@@ -654,5 +654,5 @@
  * @param size    Data size in bytes
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_send_impl(tcp_client_t *client, sysarg_t conn_id,
@@ -684,5 +684,5 @@
  * @param nrecv   Place to store actual number of bytes received
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int tcp_conn_recv_impl(tcp_client_t *client, sysarg_t conn_id,
@@ -1244,5 +1244,5 @@
 /** Initialize TCP service.
  *
- * @return EOK on success or negative error code.
+ * @return EOK on success or an error code.
  */
 int tcp_service_init(void)
Index: uspace/srv/net/udp/service.c
===================================================================
--- uspace/srv/net/udp/service.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/net/udp/service.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -205,5 +205,5 @@
  * @param rassoc_id Place to store ID of new association
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int udp_assoc_create_impl(udp_client_t *client, inet_ep2_t *epp,
@@ -305,5 +305,5 @@
  * @param size     Message size
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 static int udp_assoc_send_msg_impl(udp_client_t *client, sysarg_t assoc_id,
@@ -750,5 +750,5 @@
 /** Initialize UDP service.
  *
- * @return EOK on success or negative error code.
+ * @return EOK on success or an error code.
  */
 int udp_service_init(void)
Index: uspace/srv/vfs/vfs_register.c
===================================================================
--- uspace/srv/vfs/vfs_register.c	(revision 3c7702c05cfce1577b9b1bb89cfe61f809c024db)
+++ uspace/srv/vfs/vfs_register.c	(revision e5fe873e6ece249ae475d58dae9a738bfe8b8ea0)
@@ -346,5 +346,5 @@
  *                vfs_fstypes_free().
  *
- * @return EOK on success or negative error code
+ * @return EOK on success or an error code
  */
 int vfs_get_fstypes(vfs_fstypes_t *fstypes)