1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a0362d5a911e..a571495a9ac6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1504,6 +1504,10 @@ and is between 256 and 4096 characters. It is defined in the file
 
         rootfstype=     [KNL] Set root filesystem type
 
+        rootwait        [KNL] Wait (indefinitely) for root device to show up.
+                        Useful for devices that are detected asynchronously
+                        (e.g. USB and MMC devices).
+
         rw              [KNL] Mount root device read-write on boot
 
         S               [KNL] Run init in single mode