diff --git a/arch/avr32/lib/bootm.c b/arch/avr32/lib/bootm.c
index 87f3f9c..eedab9d 100644
--- a/arch/avr32/lib/bootm.c
+++ b/arch/avr32/lib/bootm.c
@@ -187,6 +187,15 @@
 	struct	tag *params, *params_start;
 	char	*commandline = getenv("bootargs");
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 *
+	 * TODO: Andreas Bießmann <andreas.devel@googlemail.com> refactor the
+	 * do_bootm_linux() for avr32
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/m68k/lib/bootm.c b/arch/m68k/lib/bootm.c
index 56b6512..cc45167 100644
--- a/arch/m68k/lib/bootm.c
+++ b/arch/m68k/lib/bootm.c
@@ -75,6 +75,12 @@
 	void  (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
 	struct lmb *lmb = &images->lmb;
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/microblaze/lib/bootm.c b/arch/microblaze/lib/bootm.c
index b328f94..c5dfc9e 100644
--- a/arch/microblaze/lib/bootm.c
+++ b/arch/microblaze/lib/bootm.c
@@ -40,6 +40,12 @@
 	char	*commandline = getenv("bootargs");
 	ulong	rd_data_start, rd_data_end;
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/nds32/lib/bootm.c b/arch/nds32/lib/bootm.c
index 03f58bf..65ae1eb 100644
--- a/arch/nds32/lib/bootm.c
+++ b/arch/nds32/lib/bootm.c
@@ -58,6 +58,12 @@
 	char *commandline = getenv("bootargs");
 #endif
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c
index 114e146..51597ea 100644
--- a/arch/nios2/lib/bootm.c
+++ b/arch/nios2/lib/bootm.c
@@ -45,6 +45,12 @@
 	if (of_flat_tree)
 		initrd_end = (ulong)of_flat_tree;
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/openrisc/lib/bootm.c b/arch/openrisc/lib/bootm.c
index 7f716b8..24ca0a7 100644
--- a/arch/openrisc/lib/bootm.c
+++ b/arch/openrisc/lib/bootm.c
@@ -41,6 +41,12 @@
 	void	(*kernel) (unsigned int);
 	ulong	rd_data_start, rd_data_end;
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/sh/lib/bootm.c b/arch/sh/lib/bootm.c
index 57273fa..4fdc7aa 100644
--- a/arch/sh/lib/bootm.c
+++ b/arch/sh/lib/bootm.c
@@ -79,6 +79,12 @@
 	unsigned long size = images->ep - (unsigned long)param;
 	char *bootargs = getenv("bootargs");
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
diff --git a/arch/sparc/lib/bootm.c b/arch/sparc/lib/bootm.c
index 1a9343c..9e5fb40 100644
--- a/arch/sparc/lib/bootm.c
+++ b/arch/sparc/lib/bootm.c
@@ -99,6 +99,12 @@
 	void (*kernel) (struct linux_romvec *, void *);
 	int ret;
 
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
+
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;