gss_krb5: handle new context format from gssd

For encryption types other than DES, gssd sends down context information
in a new format.  This new format includes the information needed to
support the new Kerberos GSS-API tokens defined in rfc4121.

Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/auth_gss/gss_krb5_keys.c b/net/sunrpc/auth_gss/gss_krb5_keys.c
index 832ce90..253b414 100644
--- a/net/sunrpc/auth_gss/gss_krb5_keys.c
+++ b/net/sunrpc/auth_gss/gss_krb5_keys.c
@@ -147,7 +147,7 @@
  * Taken from MIT Kerberos and modified.
  */
 
-u32 krb5_derive_key(struct gss_krb5_enctype *gk5e,
+u32 krb5_derive_key(const struct gss_krb5_enctype *gk5e,
 		    const struct xdr_netobj *inkey,
 		    struct xdr_netobj *outkey,
 		    const struct xdr_netobj *in_constant)