NFS: Allow NFSROOT debugging messages to be enabled dynamically

As a convenience, introduce a kernel command line option to enable
NFSROOT debugging messages.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f084af0cb8e0..0fe70b2c4194 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1532,12 +1532,15 @@ and is between 256 and 4096 characters. It is defined in the file
                         1 to enable accounting
                         Default value is 0.
 
-        nfsaddrs=       [NFS]
+        nfsaddrs=       [NFS] Deprecated.  Use ip= instead.
                         See Documentation/filesystems/nfs/nfsroot.txt.
 
         nfsroot=        [NFS] nfs root filesystem for disk-less boxes.
                         See Documentation/filesystems/nfs/nfsroot.txt.
 
+        nfsrootdebug    [NFS] enable nfsroot debugging messages.
+                        See Documentation/filesystems/nfs/nfsroot.txt.
+
         nfs.callback_tcpport=
                         [NFS] set the TCP port on which the NFSv4 callback
                         channel should listen.