diff mbox

[U-Boot,v2,3/5] blackfin: replace bfin_gen_rand_mac() with eth_random_addr()

Message ID 1397815791-21950-4-git-send-email-yamada.m@jp.panasonic.com
State Accepted
Delegated to: Tom Rini
Headers show

Commit Message

Masahiro Yamada April 18, 2014, 10:09 a.m. UTC 
bfin_gen_rand_mac() uses __DATE__ as the seed for random ethernet
address. This makes the build non-deterministic.

In the first place, it should not be implemented as a Bfin-specific
function. Use eth_random_addr() instead.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Sonic Zhang <sonic.zhang@analog.com>
---

Changes in v2:
  - Improve commit description

 arch/blackfin/include/asm/net.h       | 28 ----------------------------
 board/bct-brettl2/bct-brettl2.c       |  3 +--
 board/bf518f-ezbrd/bf518f-ezbrd.c     |  3 +--
 board/bf526-ezbrd/bf526-ezbrd.c       |  3 +--
 board/bf527-ezkit/bf527-ezkit.c       |  3 +--
 board/bf537-minotaur/bf537-minotaur.c |  3 +--
 board/bf537-pnav/bf537-pnav.c         |  3 +--
 board/bf537-srv1/bf537-srv1.c         |  3 +--
 board/bf537-stamp/bf537-stamp.c       |  3 +--
 board/cm-bf527/cm-bf527.c             |  3 +--
 board/cm-bf537e/cm-bf537e.c           |  3 +--
 board/cm-bf537u/cm-bf537u.c           |  3 +--
 board/dnp5370/dnp5370.c               |  3 +--
 board/ip04/ip04.c                     |  3 +--
 board/tcm-bf518/tcm-bf518.c           |  3 +--
 board/tcm-bf537/tcm-bf537.c           |  3 +--
 include/configs/bct-brettl2.h         |  1 +
 include/configs/bf518f-ezbrd.h        |  2 +-
 include/configs/bf526-ezbrd.h         |  2 +-
 include/configs/bf527-ezkit.h         |  2 +-
 include/configs/bf537-minotaur.h      |  1 +
 include/configs/bf537-pnav.h          |  2 +-
 include/configs/bf537-srv1.h          |  2 +-
 include/configs/bf537-stamp.h         |  2 +-
 include/configs/cm-bf527.h            |  2 +-
 include/configs/cm-bf537e.h           |  2 +-
 include/configs/cm-bf537u.h           |  2 +-
 include/configs/dnp5370.h             |  2 ++
 include/configs/ip04.h                |  1 +
 include/configs/tcm-bf518.h           |  2 +-
 include/configs/tcm-bf537.h           |  2 +-
 31 files changed, 31 insertions(+), 69 deletions(-)
 delete mode 100644 arch/blackfin/include/asm/net.h

Comments

Tom Rini May 13, 2014, 1:52 a.m. UTC | #1 
On Fri, Apr 18, 2014 at 07:09:49PM +0900, Masahiro Yamada wrote:

> bfin_gen_rand_mac() uses __DATE__ as the seed for random ethernet
> address. This makes the build non-deterministic.
> 
> In the first place, it should not be implemented as a Bfin-specific
> function. Use eth_random_addr() instead.
> 
> Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
> Cc: Sonic Zhang <sonic.zhang@analog.com>

Applied to u-boot/master, thanks!
diff mbox

Patch

diff --git a/arch/blackfin/include/asm/net.h b/arch/blackfin/include/asm/net.h
deleted file mode 100644
index 97cb466..0000000
--- a/arch/blackfin/include/asm/net.h
+++ /dev/null
@@ -1,28 +0,0 @@ 
-/*
- * net.h - misc Blackfin network helpers
- *
- * Copyright (c) 2008-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef __ASM_BFIN_RAND_MAC__
-#define __ASM_BFIN_RAND_MAC__
-
-/* If the board does not have a real MAC assigned to it, then generate a
- * locally administrated pseudo-random one based on CYCLES and compile date.
- */
-static inline void bfin_gen_rand_mac(uchar *mac_addr)
-{
-	/* make something up */
-	const char s[] = __DATE__;
-	size_t i;
-	u32 cycles;
-	for (i = 0; i < 6; ++i) {
-		asm("%0 = CYCLES;" : "=r" (cycles));
-		mac_addr[i] = cycles ^ s[i];
-	}
-	mac_addr[0] = (mac_addr[0] | 0x02) & ~0x01; /* make it local unicast */
-}
-
-#endif
diff --git a/board/bct-brettl2/bct-brettl2.c b/board/bct-brettl2/bct-brettl2.c
index de5b9ff..6be9b18 100644
--- a/board/bct-brettl2/bct-brettl2.c
+++ b/board/bct-brettl2/bct-brettl2.c
@@ -12,7 +12,6 @@ 
 #include <asm/blackfin.h>
 #include <asm/portmux.h>
 #include <asm/gpio.h>
-#include <asm/net.h>
 #include <net.h>
 #include <netdev.h>
 #include <miiphy.h>
@@ -33,7 +32,7 @@  int checkboard(void)
 static void board_init_enetaddr(uchar *mac_addr)
 {
 	puts("Warning: Generating 'random' MAC address\n");
-	bfin_gen_rand_mac(mac_addr);
+	eth_random_addr(mac_addr);
 	eth_setenv_enetaddr("ethaddr", mac_addr);
 }
 
diff --git a/board/bf518f-ezbrd/bf518f-ezbrd.c b/board/bf518f-ezbrd/bf518f-ezbrd.c
index 09a2353..3a94a57 100644
--- a/board/bf518f-ezbrd/bf518f-ezbrd.c
+++ b/board/bf518f-ezbrd/bf518f-ezbrd.c
@@ -13,7 +13,6 @@ 
 #include <netdev.h>
 #include <spi.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <asm/portmux.h>
 #include <asm/mach-common/bits/otp.h>
 #include <asm/sdh.h>
@@ -48,7 +47,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/bf526-ezbrd/bf526-ezbrd.c b/board/bf526-ezbrd/bf526-ezbrd.c
index 4695b11..368d6be 100644
--- a/board/bf526-ezbrd/bf526-ezbrd.c
+++ b/board/bf526-ezbrd/bf526-ezbrd.c
@@ -12,7 +12,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <asm/mach-common/bits/otp.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -45,7 +44,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/bf527-ezkit/bf527-ezkit.c b/board/bf527-ezkit/bf527-ezkit.c
index 211cf24..88e1869 100644
--- a/board/bf527-ezkit/bf527-ezkit.c
+++ b/board/bf527-ezkit/bf527-ezkit.c
@@ -13,7 +13,6 @@ 
 #include <netdev.h>
 #include <asm/blackfin.h>
 #include <asm/gpio.h>
-#include <asm/net.h>
 #include <asm/mach-common/bits/otp.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -47,7 +46,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/bf537-minotaur/bf537-minotaur.c b/board/bf537-minotaur/bf537-minotaur.c
index 920429c..ca61ef9 100644
--- a/board/bf537-minotaur/bf537-minotaur.c
+++ b/board/bf537-minotaur/bf537-minotaur.c
@@ -12,7 +12,6 @@ 
 #include <netdev.h>
 #include <net.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -27,7 +26,7 @@  int checkboard(void)
 static void board_init_enetaddr(uchar *mac_addr)
 {
 	puts("Warning: Generating 'random' MAC address\n");
-	bfin_gen_rand_mac(mac_addr);
+	eth_random_addr(mac_addr);
 	eth_setenv_enetaddr("ethaddr", mac_addr);
 }
 
diff --git a/board/bf537-pnav/bf537-pnav.c b/board/bf537-pnav/bf537-pnav.c
index c512528..df00110 100644
--- a/board/bf537-pnav/bf537-pnav.c
+++ b/board/bf537-pnav/bf537-pnav.c
@@ -12,7 +12,6 @@ 
 #include <netdev.h>
 #include <net.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -27,7 +26,7 @@  int checkboard(void)
 static void board_init_enetaddr(uchar *mac_addr)
 {
 	puts("Warning: Generating 'random' MAC address\n");
-	bfin_gen_rand_mac(mac_addr);
+	eth_random_addr(mac_addr);
 	eth_setenv_enetaddr("ethaddr", mac_addr);
 }
 
diff --git a/board/bf537-srv1/bf537-srv1.c b/board/bf537-srv1/bf537-srv1.c
index 04d3891..725296a 100644
--- a/board/bf537-srv1/bf537-srv1.c
+++ b/board/bf537-srv1/bf537-srv1.c
@@ -12,7 +12,6 @@ 
 #include <netdev.h>
 #include <net.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -27,7 +26,7 @@  int checkboard(void)
 static void board_init_enetaddr(uchar *mac_addr)
 {
 	puts("Warning: Generating 'random' MAC address\n");
-	bfin_gen_rand_mac(mac_addr);
+	eth_random_addr(mac_addr);
 	eth_setenv_enetaddr("ethaddr", mac_addr);
 }
 
diff --git a/board/bf537-stamp/bf537-stamp.c b/board/bf537-stamp/bf537-stamp.c
index 5fdf837..32045a9 100644
--- a/board/bf537-stamp/bf537-stamp.c
+++ b/board/bf537-stamp/bf537-stamp.c
@@ -13,7 +13,6 @@ 
 #include <config.h>
 #include <command.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <net.h>
 #include <asm/mach-common/bits/bootrom.h>
 #include <netdev.h>
@@ -48,7 +47,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/cm-bf527/cm-bf527.c b/board/cm-bf527/cm-bf527.c
index a5f70a4..1533eb9 100644
--- a/board/cm-bf527/cm-bf527.c
+++ b/board/cm-bf527/cm-bf527.c
@@ -11,7 +11,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <asm/mach-common/bits/otp.h>
 #include "../cm-bf537e/gpio_cfi_flash.h"
 
@@ -46,7 +45,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/cm-bf537e/cm-bf537e.c b/board/cm-bf537e/cm-bf537e.c
index 8daf3ad..e79f90f 100644
--- a/board/cm-bf537e/cm-bf537e.c
+++ b/board/cm-bf537e/cm-bf537e.c
@@ -12,7 +12,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include "gpio_cfi_flash.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -32,7 +31,7 @@  static void board_init_enetaddr(char *var)
 		return;
 
 	printf("Warning: %s: generating 'random' MAC address\n", var);
-	bfin_gen_rand_mac(enetaddr);
+	eth_random_addr(enetaddr);
 	eth_setenv_enetaddr(var, enetaddr);
 }
 
diff --git a/board/cm-bf537u/cm-bf537u.c b/board/cm-bf537u/cm-bf537u.c
index 5941b5f..632cbda 100644
--- a/board/cm-bf537u/cm-bf537u.c
+++ b/board/cm-bf537u/cm-bf537u.c
@@ -12,7 +12,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include "../cm-bf537e/gpio_cfi_flash.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -32,7 +31,7 @@  static void board_init_enetaddr(char *var)
 		return;
 
 	printf("Warning: %s: generating 'random' MAC address\n", var);
-	bfin_gen_rand_mac(enetaddr);
+	eth_random_addr(enetaddr);
 	eth_setenv_enetaddr(var, enetaddr);
 }
 
diff --git a/board/dnp5370/dnp5370.c b/board/dnp5370/dnp5370.c
index 4b3873b..df721c9 100644
--- a/board/dnp5370/dnp5370.c
+++ b/board/dnp5370/dnp5370.c
@@ -14,7 +14,6 @@ 
 #include <common.h>
 #include <config.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <net.h>
 #include <netdev.h>
 #include <asm/gpio.h>
@@ -55,7 +54,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/ip04/ip04.c b/board/ip04/ip04.c
index c8ae512..ae52633 100644
--- a/board/ip04/ip04.c
+++ b/board/ip04/ip04.c
@@ -13,7 +13,6 @@ 
 #include <common.h>
 #include <net.h>
 #include <netdev.h>
-#include <asm/net.h>
 
 int checkboard(void)
 {
@@ -33,7 +32,7 @@  int misc_init_r(void)
 	uchar enetaddr[6];
 	if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(enetaddr);
+		eth_random_addr(enetaddr);
 		eth_setenv_enetaddr("ethaddr", enetaddr);
 	}
 
diff --git a/board/tcm-bf518/tcm-bf518.c b/board/tcm-bf518/tcm-bf518.c
index 5964059..5d25fcd 100644
--- a/board/tcm-bf518/tcm-bf518.c
+++ b/board/tcm-bf518/tcm-bf518.c
@@ -11,7 +11,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include <asm/mach-common/bits/otp.h>
 #include <asm/sdh.h>
 
@@ -47,7 +46,7 @@  static void board_init_enetaddr(uchar *mac_addr)
 
 	if (!valid_mac) {
 		puts("Warning: Generating 'random' MAC address\n");
-		bfin_gen_rand_mac(mac_addr);
+		eth_random_addr(mac_addr);
 	}
 
 	eth_setenv_enetaddr("ethaddr", mac_addr);
diff --git a/board/tcm-bf537/tcm-bf537.c b/board/tcm-bf537/tcm-bf537.c
index 38aaae6..a4f0f71 100644
--- a/board/tcm-bf537/tcm-bf537.c
+++ b/board/tcm-bf537/tcm-bf537.c
@@ -12,7 +12,6 @@ 
 #include <net.h>
 #include <netdev.h>
 #include <asm/blackfin.h>
-#include <asm/net.h>
 #include "../cm-bf537e/gpio_cfi_flash.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -32,7 +31,7 @@  static void board_init_enetaddr(char *var)
 		return;
 
 	printf("Warning: %s: generating 'random' MAC address\n", var);
-	bfin_gen_rand_mac(enetaddr);
+	eth_random_addr(enetaddr);
 	eth_setenv_enetaddr(var, enetaddr);
 }
 
diff --git a/include/configs/bct-brettl2.h b/include/configs/bct-brettl2.h
index 06f095c..c1eda96 100644
--- a/include/configs/bct-brettl2.h
+++ b/include/configs/bct-brettl2.h
@@ -75,6 +75,7 @@ 
 #define CONFIG_ROOTPATH		"/romfs/brettl2"
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
+#define CONFIG_LIB_RAND
 #endif
 
 
diff --git a/include/configs/bf518f-ezbrd.h b/include/configs/bf518f-ezbrd.h
index 9eb85eb..9e374c4 100644
--- a/include/configs/bf518f-ezbrd.h
+++ b/include/configs/bf518f-ezbrd.h
@@ -89,7 +89,7 @@ 
 #define CONFIG_PHY_ADDR		3
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf526-ezbrd.h b/include/configs/bf526-ezbrd.h
index 3065d22..972eca9 100644
--- a/include/configs/bf526-ezbrd.h
+++ b/include/configs/bf526-ezbrd.h
@@ -87,7 +87,7 @@ 
 #define CONFIG_HOSTNAME		bf526-ezbrd
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf527-ezkit.h b/include/configs/bf527-ezkit.h
index 748ddb3..92c183e 100644
--- a/include/configs/bf527-ezkit.h
+++ b/include/configs/bf527-ezkit.h
@@ -85,7 +85,7 @@ 
 #define CONFIG_HOSTNAME		bf527-ezkit
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf537-minotaur.h b/include/configs/bf537-minotaur.h
index 156eeab..3bc364c 100644
--- a/include/configs/bf537-minotaur.h
+++ b/include/configs/bf537-minotaur.h
@@ -89,6 +89,7 @@ 
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:42 */
 
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf537-pnav.h b/include/configs/bf537-pnav.h
index 3aa3d50..ba74a69 100644
--- a/include/configs/bf537-pnav.h
+++ b/include/configs/bf537-pnav.h
@@ -67,7 +67,7 @@ 
 #define CONFIG_HOSTNAME		bf537-pnav
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:24:21:18 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf537-srv1.h b/include/configs/bf537-srv1.h
index e12d761..0b723cf 100644
--- a/include/configs/bf537-srv1.h
+++ b/include/configs/bf537-srv1.h
@@ -88,7 +88,7 @@ 
 #define CONFIG_ROOTPATH		"/romfs"
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:42 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/bf537-stamp.h b/include/configs/bf537-stamp.h
index e1705ca..a302f83 100644
--- a/include/configs/bf537-stamp.h
+++ b/include/configs/bf537-stamp.h
@@ -67,7 +67,7 @@ 
 #define CONFIG_HOSTNAME		bf537-stamp
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/cm-bf527.h b/include/configs/cm-bf527.h
index 384d871..8d3ae49 100644
--- a/include/configs/cm-bf527.h
+++ b/include/configs/cm-bf527.h
@@ -85,7 +85,7 @@ 
 #define CONFIG_HOSTNAME		cm-bf527
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/cm-bf537e.h b/include/configs/cm-bf537e.h
index 67cf801..47967d7 100644
--- a/include/configs/cm-bf537e.h
+++ b/include/configs/cm-bf537e.h
@@ -73,7 +73,7 @@ 
 #define CONFIG_HOSTNAME		cm-bf537e
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/cm-bf537u.h b/include/configs/cm-bf537u.h
index 34ce75b..88c9982 100644
--- a/include/configs/cm-bf537u.h
+++ b/include/configs/cm-bf537u.h
@@ -71,7 +71,7 @@ 
 #define CONFIG_HOSTNAME		cm-bf537u
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/dnp5370.h b/include/configs/dnp5370.h
index 4f2c742..3f1f9f3 100644
--- a/include/configs/dnp5370.h
+++ b/include/configs/dnp5370.h
@@ -55,6 +55,8 @@ 
 
 #define CONFIG_CMD_MII
 #define CONFIG_CMD_PING
+
+#define CONFIG_LIB_RAND
 #endif
 
 /*
diff --git a/include/configs/ip04.h b/include/configs/ip04.h
index 0efa2b7..3767502 100644
--- a/include/configs/ip04.h
+++ b/include/configs/ip04.h
@@ -77,6 +77,7 @@ 
 #define DM9000_IO		CONFIG_DM9000_BASE
 #define DM9000_DATA		(CONFIG_DM9000_BASE + 2)
 
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/tcm-bf518.h b/include/configs/tcm-bf518.h
index 1ff34d5..a77ba69 100644
--- a/include/configs/tcm-bf518.h
+++ b/include/configs/tcm-bf518.h
@@ -68,7 +68,7 @@ 
 #define CONFIG_HOSTNAME		tcm-bf518
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings
diff --git a/include/configs/tcm-bf537.h b/include/configs/tcm-bf537.h
index 370d97f..c4c1c57 100644
--- a/include/configs/tcm-bf537.h
+++ b/include/configs/tcm-bf537.h
@@ -73,7 +73,7 @@ 
 #define CONFIG_HOSTNAME		tcm-bf537
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:e8 */
-
+#define CONFIG_LIB_RAND
 
 /*
  * Flash Settings