diff --git a/drivers/net/de600.c b/drivers/net/de600.c
index 8396e411f1ce..e547ce14eefe 100644
--- a/drivers/net/de600.c
+++ b/drivers/net/de600.c
@@ -38,12 +38,6 @@ static const char version[] = "de600.c: $Revision: 1.41-2.5 $,  Bjorn Ekwall (bj
 /* Add more time here if your adapter won't work OK: */
 #define DE600_SLOW_DOWN	udelay(delay_time)
 
- /*
- * If you still have trouble reading/writing to the adapter,
- * modify the following "#define": (see <asm/io.h> for more info)
-#define REALLY_SLOW_IO
- */
-
 /* use 0 for production, 1 for verification, >2 for debug */
 #ifdef DE600_DEBUG
 #define PRINTK(x) if (de600_debug >= 2) printk x
diff --git a/drivers/net/ni52.c b/drivers/net/ni52.c
index 196993a29b09..a6f4b24b0176 100644
--- a/drivers/net/ni52.c
+++ b/drivers/net/ni52.c
@@ -104,8 +104,6 @@ static int automatic_resume; /* experimental .. better should be zero */
 static int rfdadd;	/* rfdadd=1 may be better for 8K MEM cards */
 static int fifo=0x8;	/* don't change */
 
-/* #define REALLY_SLOW_IO */
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
diff --git a/drivers/net/skfp/cfm.c b/drivers/net/skfp/cfm.c
index 4c8aaa762333..5310d39b5737 100644
--- a/drivers/net/skfp/cfm.c
+++ b/drivers/net/skfp/cfm.c
@@ -73,7 +73,7 @@ static const char * const cfm_events[] = {
 /*
  * map from state to downstream port type
  */
-static const u_char cf_to_ptype[] = {
+static const unsigned char cf_to_ptype[] = {
 	TNONE,TNONE,TNONE,TNONE,TNONE,
 	TNONE,TB,TB,TS,
 	TA,TB,TS,TB
diff --git a/drivers/net/sun3_82586.c b/drivers/net/sun3_82586.c
index a3220a96524f..4757aa647c7a 100644
--- a/drivers/net/sun3_82586.c
+++ b/drivers/net/sun3_82586.c
@@ -28,8 +28,6 @@ static int automatic_resume = 0; /* experimental .. better should be zero */
 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
 static int fifo=0x8;	/* don't change */
 
-/* #define REALLY_SLOW_IO */
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index e91b5a84a20a..5b82e4fd0d73 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -94,7 +94,6 @@
 #include <linux/device.h>
 
 #undef COSA_SLOW_IO	/* for testing purposes only */
-#undef REALLY_SLOW_IO
 
 #include <asm/io.h>
 #include <asm/dma.h>
diff --git a/drivers/net/wireless/wl3501_cs.c b/drivers/net/wireless/wl3501_cs.c
index c250f08c8dd5..ce9230b2f630 100644
--- a/drivers/net/wireless/wl3501_cs.c
+++ b/drivers/net/wireless/wl3501_cs.c
@@ -26,7 +26,6 @@
  * Tested with Planet AP in 2.5.73-bk, 216 Kbytes/s in Infrastructure mode
  * with a SMP machine (dual pentium 100), using pktgen, 432 pps (pkt_size = 60)
  */
-#undef REALLY_SLOW_IO	/* most systems can safely undef this */
 
 #include <linux/delay.h>
 #include <linux/types.h>