#define CTL_APPLDATA_NET_SUM   2125
 #define CTL_APPLDATA_PROC      2126
 
-#define P_INFO(x...)   printk(KERN_INFO MY_PRINT_NAME " info: " x)
-#define P_ERROR(x...)  printk(KERN_ERR MY_PRINT_NAME " error: " x)
-#define P_WARNING(x...)        printk(KERN_WARNING MY_PRINT_NAME " status: " x)
-
 struct appldata_ops {
        struct list_head list;
        struct ctl_table_header *sysctl_header;
 
  * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
 
+#define KMSG_COMPONENT "appldata"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include "appldata.h"
 
 
-#define MY_PRINT_NAME  "appldata"              /* for debug messages, etc. */
 #define APPLDATA_CPU_INTERVAL  10000           /* default (CPU) time for
                                                   sampling interval in
                                                   milliseconds */
                                        (unsigned long) ops->data, ops->size,
                                        ops->mod_lvl);
                if (rc != 0) {
-                       P_ERROR("START DIAG 0xDC for %s failed, "
-                               "return code: %d\n", ops->name, rc);
+                       pr_err("Starting the data collection for %s "
+                              "failed with rc=%d\n", ops->name, rc);
                        module_put(ops->owner);
                } else
                        ops->active = 1;
                                (unsigned long) ops->data, ops->size,
                                ops->mod_lvl);
                if (rc != 0)
-                       P_ERROR("STOP DIAG 0xDC for %s failed, "
-                               "return code: %d\n", ops->name, rc);
+                       pr_err("Stopping the data collection for %s "
+                              "failed with rc=%d\n", ops->name, rc);
                module_put(ops->owner);
        }
        spin_unlock(&appldata_ops_lock);
 
  * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
 
+#define KMSG_COMPONENT "appldata"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include "appldata.h"
 
 
-#define MY_PRINT_NAME  "appldata_os"           /* for debug messages, etc. */
 #define LOAD_INT(x) ((x) >> FSHIFT)
 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
 
                                           (unsigned long) ops.data, new_size,
                                           ops.mod_lvl);
                        if (rc != 0)
-                               P_ERROR("os: START NEW DIAG 0xDC failed, "
-                                       "return code: %d, new size = %i\n", rc,
-                                       new_size);
+                               pr_err("Starting a new OS data collection "
+                                      "failed with rc=%d\n", rc);
 
                        rc = appldata_diag(APPLDATA_RECORD_OS_ID,
                                           APPLDATA_STOP_REC,
                                           (unsigned long) ops.data, ops.size,
                                           ops.mod_lvl);
                        if (rc != 0)
-                               P_ERROR("os: STOP OLD DIAG 0xDC failed, "
-                                       "return code: %d, old size = %i\n", rc,
-                                       ops.size);
-                       else
-                               P_INFO("os: old record size = %i stopped\n",
-                                       ops.size);
+                               pr_err("Stopping a faulty OS data "
+                                      "collection failed with rc=%d\n", rc);
                }
                ops.size = new_size;
        }
        max_size = sizeof(struct appldata_os_data) +
                   (NR_CPUS * sizeof(struct appldata_os_per_cpu));
        if (max_size > APPLDATA_MAX_REC_SIZE) {
-               P_ERROR("Max. size of OS record = %i, bigger than maximum "
-                       "record size (%i)\n", max_size, APPLDATA_MAX_REC_SIZE);
+               pr_err("Maximum OS record size %i exceeds the maximum "
+                      "record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
                rc = -ENOMEM;
                goto out;
        }