1 files changed, 8 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 65de5ba7b74c..880f882160e2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -370,7 +370,8 @@ and is between 256 and 4096 characters. It is defined in the file
                         configured.  Potentially dangerous and should only be
                         used if you are entirely sure of the consequences.
 
-        chandev=        [HW,NET] Generic channel device initialisation
+        ccw_timeout_log [S390]
+                        See Documentation/s390/CommonIO for details.
 
         checkreqprot    [SELINUX] Set initial checkreqprot flag value.
                         Format: { "0" | "1" }
@@ -382,6 +383,12 @@ and is between 256 and 4096 characters. It is defined in the file
                         Value can be changed at runtime via
                                 /selinux/checkreqprot.
 
+        cio_ignore=     [S390]
+                        See Documentation/s390/CommonIO for details.
+
+        cio_msg=        [S390]
+                        See Documentation/s390/CommonIO for details.
+
         clock=          [BUGS=X86-32, HW] gettimeofday clocksource override.
                         [Deprecated]
                         Forces specified clocksource (if available) to be used