diff --git a/mm/pin_mem.c b/mm/pin_mem.c
index 34fe373c5fccc83e7811dcecef8fd07deb7ae968..d37938bcdc973100dfc3524c7f167f3363ecfc3f 100644
--- a/mm/pin_mem.c
+++ b/mm/pin_mem.c
@@ -1092,9 +1092,12 @@ static int __init parse_pin_memory(char *cmdline)
 {
 	char *cur = cmdline;
 
+	if (!cmdline)
+		return 0;
+
 	pin_mem_len = memparse(cmdline, &cur);
 	if (cmdline == cur) {
-		pr_warn("crashkernel: memory value expected\n");
+		pr_warn("pinmem: memory value expected\n");
 		return -EINVAL;
 	}