diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c
index 9ca84c7d49dea090d28d6bda356cc029dadd9882..8fce88f6903962f91ff1dddeda1e9571f0c1e8a6 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_config.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_config.c
@@ -1052,7 +1052,8 @@ int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 
 					oldfs = get_fs();
 					set_fs(KERNEL_DS);
-					rc = var->fops->write(&fakefile, sval,
+					rc = var->fops->write(&fakefile,
+						(const char __user *)sval,
 								vallen, NULL);
 					set_fs(oldfs);
 				}