diff --git a/sys/boot/arm/at91/libat91/lib.h b/sys/boot/arm/at91/libat91/lib.h
index fac40b1b44ff..24ac49fd3249 100644
--- a/sys/boot/arm/at91/libat91/lib.h
+++ b/sys/boot/arm/at91/libat91/lib.h
@@ -28,9 +28,9 @@
 #define ARM_BOOT_LIB_H
 
 int getc(int);
-int putchar(int);
-int xputchar(int);
-int printf(const char *fmt,...);
+void putchar(int);
+void xputchar(int);
+void printf(const char *fmt,...);
 
 /* The following function write eeprom at ee_addr using data 	*/
 /*  from data_add for size bytes.				*/
diff --git a/sys/boot/arm/at91/libat91/printf.c b/sys/boot/arm/at91/libat91/printf.c
index 8175b1448ae9..f2622b859057 100644
--- a/sys/boot/arm/at91/libat91/printf.c
+++ b/sys/boot/arm/at91/libat91/printf.c
@@ -20,13 +20,12 @@
 #include <stdarg.h>
 #include "lib.h"
 
-int
+void
 printf(const char *fmt,...)
 {
 	va_list ap;
 	const char *hex = "0123456789abcdef";
 	char buf[10];
-	const char *fmt_orig = fmt;
 	char *s;
 	unsigned u;
 	int c;
@@ -67,5 +66,5 @@ printf(const char *fmt,...)
 	}
 	va_end(ap);
 
-	return (int)(fmt - fmt_orig);
+	return;
 }
diff --git a/sys/boot/arm/at91/libat91/putchar.c b/sys/boot/arm/at91/libat91/putchar.c
index ed59528f4563..2b805c98c29b 100644
--- a/sys/boot/arm/at91/libat91/putchar.c
+++ b/sys/boot/arm/at91/libat91/putchar.c
@@ -39,11 +39,11 @@
 #include "lib.h"
 
 /*
- * int putchar(int ch)
+ * void putchar(int ch)
  * Writes a character to the DBGU port.  It assumes that DBGU has
  * already been initialized.
  */
-int
+void
 putchar(int ch)
 {
 	AT91PS_USART pUSART = (AT91PS_USART)AT91C_BASE_DBGU;
@@ -51,14 +51,12 @@ putchar(int ch)
 	while (!(pUSART->US_CSR & AT91C_US_TXRDY))
 		continue;
 	pUSART->US_THR = (ch & 0xFF);
-	return (1);
 }
 
-int
+void
 xputchar(int ch)
 {
-	if (ch == '\n')
-		putchar('\r');
-	putchar(ch);
-	return (ch == '\n' ? 2 : 1);
+    if (ch == '\n')
+	putchar('\r');
+    putchar(ch);
 }
diff --git a/sys/boot/arm/ixp425/boot2/ixp425_board.c b/sys/boot/arm/ixp425/boot2/ixp425_board.c
index 78ca8b672fd0..c13f8ed52694 100644
--- a/sys/boot/arm/ixp425/boot2/ixp425_board.c
+++ b/sys/boot/arm/ixp425/boot2/ixp425_board.c
@@ -165,7 +165,7 @@ getc(int seconds)
 	return c;
 }
 
-int
+void
 putchar(int ch)
 {
 	int delay, limit;
@@ -179,16 +179,14 @@ putchar(int ch)
 	limit = 40;
 	while ((uart_getreg(ubase, REG_LSR) & LSR_TEMT) == 0 && --limit)
 		DELAY(delay);
-	return (1);
 }
 
-int
+void
 xputchar(int ch)
 {
 	if (ch == '\n')
 		putchar('\r');
 	putchar(ch);
-	return (ch == '\n' ? 2 : 1);
 }
 
 void
diff --git a/sys/boot/arm/ixp425/boot2/lib.h b/sys/boot/arm/ixp425/boot2/lib.h
index e72096005147..9c88030c2503 100644
--- a/sys/boot/arm/ixp425/boot2/lib.h
+++ b/sys/boot/arm/ixp425/boot2/lib.h
@@ -35,12 +35,12 @@ int main(void);
 void DELAY(int);
 
 int getc(int);
-int putchar(int);
-int xputchar(int);
+void putchar(int);
+void xputchar(int);
 void putstr(const char *);
 void puthex8(u_int8_t);
 void puthexlist(const u_int8_t *, int);
-int printf(const char *fmt,...);
+void printf(const char *fmt,...);
 
 void bzero(void *, size_t);
 char *strcpy(char *to, const char *from);
diff --git a/sys/boot/i386/boot2/boot2.c b/sys/boot/i386/boot2/boot2.c
index 21df3a801484..cc5d76f86dad 100644
--- a/sys/boot/i386/boot2/boot2.c
+++ b/sys/boot/i386/boot2/boot2.c
@@ -114,8 +114,8 @@ void exit(int);
 static void load(void);
 static int parse(void);
 static int dskread(void *, unsigned, unsigned);
-static int printf(const char *,...);
-static int putchar(int);
+static void printf(const char *,...);
+static void putchar(int);
 static int drvread(void *, unsigned, unsigned);
 static int keyhit(unsigned);
 static int xputc(int);
@@ -521,12 +521,11 @@ error:
     return -1;
 }
 
-static int
+static void
 printf(const char *fmt,...)
 {
     va_list ap;
     static char buf[10];
-    const char *fmt_orig = fmt;
     char *s;
     unsigned u;
     int c;
@@ -557,16 +556,15 @@ printf(const char *fmt,...)
 	putchar(c);
     }
     va_end(ap);
-    return (int)(fmt - fmt_orig);
+    return;
 }
 
-static int
+static void
 putchar(int c)
 {
     if (c == '\n')
 	xputc('\r');
     xputc(c);
-    return (c == '\n' ? 2 : 1);
 }
 
 static int