diff --git a/drivers/net/wan/cycx_drv.c b/drivers/net/wan/cycx_drv.c
index a5ddc6c8963e3e189f65e8213e0110b9941841e6..164c3624ba895c0720a6604638a7983947a242af 100644
--- a/drivers/net/wan/cycx_drv.c
+++ b/drivers/net/wan/cycx_drv.c
@@ -73,7 +73,7 @@ static int reset_cyc2x(void __iomem *addr);
 static int detect_cyc2x(void __iomem *addr);
 
 /* Miscellaneous functions */
-static int get_option_index(long *optlist, long optval);
+static int get_option_index(const long *optlist, long optval);
 static u16 checksum(u8 *buf, u32 len);
 
 #define wait_cyc(addr) cycx_exec(addr + CMD_OFFSET)
@@ -81,23 +81,23 @@ static u16 checksum(u8 *buf, u32 len);
 /* Global Data */
 
 /* private data */
-static char modname[] = "cycx_drv";
-static char fullname[] = "Cyclom 2X Support Module";
-static char copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
+static const char modname[] = "cycx_drv";
+static const char fullname[] = "Cyclom 2X Support Module";
+static const char copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
 			  "<acme@conectiva.com.br>";
 
 /* Hardware configuration options.
  * These are arrays of configuration options used by verification routines.
  * The first element of each array is its size (i.e. number of options).
  */
-static long cyc2x_dpmbase_options[] = {
+static const long cyc2x_dpmbase_options[] = {
 	20,
 	0xA0000, 0xA4000, 0xA8000, 0xAC000, 0xB0000, 0xB4000, 0xB8000,
 	0xBC000, 0xC0000, 0xC4000, 0xC8000, 0xCC000, 0xD0000, 0xD4000,
 	0xD8000, 0xDC000, 0xE0000, 0xE4000, 0xE8000, 0xEC000
 };
 
-static long cycx_2x_irq_options[]  = { 7, 3, 5, 9, 10, 11, 12, 15 };
+static const long cycx_2x_irq_options[]  = { 7, 3, 5, 9, 10, 11, 12, 15 };
 
 /* Kernel Loadable Module Entry Points */
 /* Module 'insert' entry point.
@@ -529,7 +529,7 @@ static int detect_cyc2x(void __iomem *addr)
 /* Miscellaneous */
 /* Get option's index into the options list.
  *	Return option's index (1 .. N) or zero if option is invalid. */
-static int get_option_index(long *optlist, long optval)
+static int get_option_index(const long *optlist, long optval)
 {
 	int i = 1;
 
diff --git a/drivers/net/wan/cycx_main.c b/drivers/net/wan/cycx_main.c
index a0e8611ad8e81e167ac5cf566f82ab7dcf1eeb84..859dba9b972ea883da8a91b7fef0cb0d9d5ded35 100644
--- a/drivers/net/wan/cycx_main.c
+++ b/drivers/net/wan/cycx_main.c
@@ -81,9 +81,9 @@ static irqreturn_t cycx_isr(int irq, void *dev_id);
  */
 
 /* private data */
-static char cycx_drvname[] = "cyclomx";
-static char cycx_fullname[] = "CYCLOM 2X(tm) Sync Card Driver";
-static char cycx_copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
+static const char cycx_drvname[] = "cyclomx";
+static const char cycx_fullname[] = "CYCLOM 2X(tm) Sync Card Driver";
+static const char cycx_copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
 			  "<acme@conectiva.com.br>";
 static int cycx_ncards = CONFIG_CYCX_CARDS;
 static struct cycx_device *cycx_card_array;	/* adapter data space */
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 4d4dc38c72902e9ca62e8b7655cb9b70388a1a17..7f5bb913c8b928ad20b8aa9bb8a0b84b5adcbbab 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -46,7 +46,7 @@
 
 #include <net/x25device.h>
 
-static char bcast_addr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+static const u8 bcast_addr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 
 /* If this number is made larger, check that the temporary string buffer
  * in lapbeth_new_device is large enough to store the probe device name.*/
diff --git a/drivers/net/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
index c6aa66e5b52f34aedd5736e3c7e8c967870c24d2..fbf1175a07f19faa4b2a03471aba041c83a57eb3 100644
--- a/drivers/net/wan/pc300_drv.c
+++ b/drivers/net/wan/pc300_drv.c
@@ -1,5 +1,5 @@
 #define	USE_PCI_CLOCK
-static char rcsid[] = 
+static const char rcsid[] =
 "Revision: 3.4.5 Date: 2002/03/07 ";
 
 /*
diff --git a/drivers/net/wan/z85230.c b/drivers/net/wan/z85230.c
index fbf5e843d48c1fd9f88b55ef993ea74474488041..93956861ea210eb08d773461827a172b7493294f 100644
--- a/drivers/net/wan/z85230.c
+++ b/drivers/net/wan/z85230.c
@@ -766,7 +766,7 @@ irqreturn_t z8530_interrupt(int irq, void *dev_id)
 
 EXPORT_SYMBOL(z8530_interrupt);
 
-static char reg_init[16]=
+static const u8 reg_init[16]=
 {
 	0,0,0,0,
 	0,0,0,0,
@@ -1206,7 +1206,7 @@ EXPORT_SYMBOL(z8530_sync_txdma_close);
  *	it exists...
  */
  
-static char *z8530_type_name[]={
+static const char *z8530_type_name[]={
 	"Z8530",
 	"Z85C30",
 	"Z85230"