1 files changed, 4 insertions, 0 deletions

diff --git a/init/do_mounts.c b/init/do_mounts.c
index 3715feb8446d..d055b1914c3d 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -263,6 +263,10 @@ retry:
                 printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
 
                 printk_all_partitions();
+#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
+                printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
+                       "explicit textual name for \"root=\" boot option.\n");
+#endif
                 panic("VFS: Unable to mount root fs on %s", b);
         }