diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 3c679d3..4c3b7df46 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -194,6 +194,8 @@
  */
 #define MAX_ERRORS 12
 
+#define custom amiga_custom
+
 /* Prevent "aliased" accesses. */
 static int fd_ref[4] = { 0,0,0,0 };
 static int fd_device[4] = { 0, 0, 0, 0 };
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 869518e..aabb368 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -99,6 +99,7 @@
 #define _INLINE_ inline
 #endif
 
+#define custom amiga_custom
 static char *serial_name = "Amiga-builtin serial driver";
 
 static struct tty_driver *serial_driver;
diff --git a/drivers/input/joystick/amijoy.c b/drivers/input/joystick/amijoy.c
index 8558a99..ec55a29 100644
--- a/drivers/input/joystick/amijoy.c
+++ b/drivers/input/joystick/amijoy.c
@@ -64,8 +64,8 @@
 		if (amijoy[i]) {
 
 			switch (i) {
-				case 0: data = ~custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
-				case 1: data = ~custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
+				case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
+				case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
 			}
 
 			input_regs(amijoy_dev[i], fp);
diff --git a/drivers/input/mouse/amimouse.c b/drivers/input/mouse/amimouse.c
index d13d4c8..c8b2cc9 100644
--- a/drivers/input/mouse/amimouse.c
+++ b/drivers/input/mouse/amimouse.c
@@ -41,7 +41,7 @@
 	unsigned short joy0dat, potgor;
 	int nx, ny, dx, dy;
 
-	joy0dat = custom.joy0dat;
+	joy0dat = amiga_custom.joy0dat;
 
 	nx = joy0dat & 0xff;
 	ny = joy0dat >> 8;
@@ -57,7 +57,7 @@
 	amimouse_lastx = nx;
 	amimouse_lasty = ny;
 
-	potgor = custom.potgor;
+	potgor = amiga_custom.potgor;
 
 	input_regs(amimouse_dev, fp);
 
@@ -77,7 +77,7 @@
 {
 	unsigned short joy0dat;
 
-	joy0dat = custom.joy0dat;
+	joy0dat = amiga_custom.joy0dat;
 
 	amimouse_lastx = joy0dat & 0xff;
 	amimouse_lasty = joy0dat >> 8;
diff --git a/drivers/scsi/blz1230.c b/drivers/scsi/blz1230.c
index 763e409..3867ac2 100644
--- a/drivers/scsi/blz1230.c
+++ b/drivers/scsi/blz1230.c
@@ -224,7 +224,7 @@
 static void dma_dump_state(struct NCR_ESP *esp)
 {
 	ESPLOG(("intreq:<%04x>, intena:<%04x>\n",
-		custom.intreqr, custom.intenar));
+		amiga_custom.intreqr, amiga_custom.intenar));
 }
 
 void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
@@ -298,7 +298,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/scsi/blz2060.c b/drivers/scsi/blz2060.c
index d72d05f..4ebe69e 100644
--- a/drivers/scsi/blz2060.c
+++ b/drivers/scsi/blz2060.c
@@ -190,7 +190,7 @@
 static void dma_dump_state(struct NCR_ESP *esp)
 {
 	ESPLOG(("intreq:<%04x>, intena:<%04x>\n",
-		custom.intreqr, custom.intenar));
+		amiga_custom.intreqr, amiga_custom.intenar));
 }
 
 static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
@@ -251,7 +251,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/scsi/cyberstorm.c b/drivers/scsi/cyberstorm.c
index f9b940e..a4a4fac 100644
--- a/drivers/scsi/cyberstorm.c
+++ b/drivers/scsi/cyberstorm.c
@@ -223,7 +223,7 @@
 		esp->esp_id, ((struct cyber_dma_registers *)
 			      (esp->dregs))->cond_reg));
 	ESPLOG(("intreq:<%04x>, intena:<%04x>\n",
-		custom.intreqr, custom.intenar));
+		amiga_custom.intreqr, amiga_custom.intenar));
 }
 
 static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
@@ -322,7 +322,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/scsi/cyberstormII.c b/drivers/scsi/cyberstormII.c
index a3caabf..3a803d7 100644
--- a/drivers/scsi/cyberstormII.c
+++ b/drivers/scsi/cyberstormII.c
@@ -200,7 +200,7 @@
 		esp->esp_id, ((struct cyberII_dma_registers *)
 			      (esp->dregs))->cond_reg));
 	ESPLOG(("intreq:<%04x>, intena:<%04x>\n",
-		custom.intreqr, custom.intenar));
+		amiga_custom.intreqr, amiga_custom.intenar));
 }
 
 static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
@@ -259,7 +259,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/scsi/fastlane.c b/drivers/scsi/fastlane.c
index ccee68b..8ae9c40 100644
--- a/drivers/scsi/fastlane.c
+++ b/drivers/scsi/fastlane.c
@@ -268,7 +268,7 @@
 		esp->esp_id, ((struct fastlane_dma_registers *)
 			      (esp->dregs))->cond_reg));
 	ESPLOG(("intreq:<%04x>, intena:<%04x>\n",
-		custom.intreqr, custom.intenar));
+		amiga_custom.intreqr, amiga_custom.intenar));
 }
 
 static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length)
@@ -368,7 +368,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/scsi/oktagon_esp.c b/drivers/scsi/oktagon_esp.c
index 5d9c9ad..dee426f 100644
--- a/drivers/scsi/oktagon_esp.c
+++ b/drivers/scsi/oktagon_esp.c
@@ -490,7 +490,7 @@
 
 static int dma_ports_p(struct NCR_ESP *esp)
 {
-	return ((custom.intenar) & IF_PORTS);
+	return ((amiga_custom.intenar) & IF_PORTS);
 }
 
 static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
diff --git a/drivers/video/amifb.c b/drivers/video/amifb.c
index d549e21..8cfba10 100644
--- a/drivers/video/amifb.c
+++ b/drivers/video/amifb.c
@@ -590,6 +590,8 @@
 #define highw(x)	((u_long)(x)>>16 & 0xffff)
 #define loww(x)		((u_long)(x) & 0xffff)
 
+#define custom		amiga_custom
+
 #define VBlankOn()	custom.intena = IF_SETCLR|IF_COPER
 #define VBlankOff()	custom.intena = IF_COPER