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-rw-r--r--arch/s390/kernel/setup.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 865a48871ca4..1a3388c32a83 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -636,6 +636,8 @@ static void __init reserve_crashkernel(void)
static void __init reserve_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
+ if (!INITRD_START || !INITRD_SIZE)
+ return;
initrd_start = INITRD_START;
initrd_end = initrd_start + INITRD_SIZE;
memblock_reserve(INITRD_START, INITRD_SIZE);