Index: kernel/generic/include/sysinfo/sysinfo.h
===================================================================
--- kernel/generic/include/sysinfo/sysinfo.h	(revision efb8d156b56b92ac4b5ad3fef94eea065ccc4333)
+++ kernel/generic/include/sysinfo/sysinfo.h	(revision 196c2530df71f9f2878804f3f8971bb545304e28)
@@ -1,4 +1,5 @@
 /*
  * Copyright (c) 2006 Jakub Vana
+ * Copyright (c) 2012 Martin Decky
  * All rights reserved.
  *
@@ -54,9 +55,26 @@
 struct sysinfo_item;
 
-/** Gerated numeric value function */
-typedef sysarg_t (*sysinfo_fn_val_t)(struct sysinfo_item *);
+/** Generated numeric value function */
+typedef sysarg_t (*sysinfo_fn_val_t)(struct sysinfo_item *, void *);
+
+/** Sysinfo generated numberic value data
+ *
+ */
+typedef struct {
+	sysinfo_fn_val_t fn;  /**< Generated value function */
+	void *data;           /**< Private data */
+} sysinfo_gen_val_data_t;
 
 /** Generated binary data function */
-typedef void *(*sysinfo_fn_data_t)(struct sysinfo_item *, size_t *, bool);
+typedef void *(*sysinfo_fn_data_t)(struct sysinfo_item *, size_t *, bool,
+    void *);
+
+/** Sysinfo generated binary data data
+ *
+ */
+typedef struct {
+	sysinfo_fn_data_t fn;  /**< Generated binary data function */
+	void *data;            /**< Private data */
+} sysinfo_gen_data_data_t;
 
 /** Sysinfo item binary data
@@ -72,8 +90,8 @@
  */
 typedef union {
-	sysarg_t val;               /**< Constant numberic value */
-	sysinfo_data_t data;        /**< Constant binary data */
-	sysinfo_fn_val_t fn_val;    /**< Generated numeric value function */
-	sysinfo_fn_data_t fn_data;  /**< Generated binary data function */
+	sysarg_t val;                      /**< Constant numberic value */
+	sysinfo_data_t data;               /**< Constant binary data */
+	sysinfo_gen_val_data_t gen_val;    /**< Generated numeric value function */
+	sysinfo_gen_data_data_t gen_data;  /**< Generated binary data function */
 } sysinfo_item_val_t;
 
@@ -103,5 +121,5 @@
 	sysinfo_fn_subtree_t fn;  /**< Generated subtree function */
 	void *data;               /**< Private data */
-} sysinfo_fn_subtree_data_t;
+} sysinfo_gen_subtree_data_t;
 
 /** Sysinfo subtree (union)
@@ -109,6 +127,6 @@
  */
 typedef union {
-	struct sysinfo_item *table;           /**< Fixed subtree (list of subitems) */
-	sysinfo_fn_subtree_data_t generator;  /**< Generated subtree */
+	struct sysinfo_item *table;            /**< Fixed subtree (list of subitems) */
+	sysinfo_gen_subtree_data_t generator;  /**< Generated subtree */
 } sysinfo_subtree_t;
 
@@ -131,8 +149,8 @@
 extern void sysinfo_set_item_data(const char *, sysinfo_item_t **, void *,
     size_t);
-extern void sysinfo_set_item_fn_val(const char *, sysinfo_item_t **,
-    sysinfo_fn_val_t);
-extern void sysinfo_set_item_fn_data(const char *, sysinfo_item_t **,
-    sysinfo_fn_data_t);
+extern void sysinfo_set_item_gen_val(const char *, sysinfo_item_t **,
+    sysinfo_fn_val_t, void *);
+extern void sysinfo_set_item_gen_data(const char *, sysinfo_item_t **,
+    sysinfo_fn_data_t, void *);
 extern void sysinfo_set_item_undefined(const char *, sysinfo_item_t **);
 
Index: kernel/generic/src/sysinfo/stats.c
===================================================================
--- kernel/generic/src/sysinfo/stats.c	(revision efb8d156b56b92ac4b5ad3fef94eea065ccc4333)
+++ kernel/generic/src/sysinfo/stats.c	(revision 196c2530df71f9f2878804f3f8971bb545304e28)
@@ -83,9 +83,10 @@
  *
  * @param item Sysinfo item (unused).
+ * @param data Unused.
  *
  * @return System uptime (in secords).
  *
  */
-static sysarg_t get_stats_uptime(struct sysinfo_item *item)
+static sysarg_t get_stats_uptime(struct sysinfo_item *item, void *data)
 {
 	/* This doesn't have to be very accurate */
@@ -98,4 +99,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data containing several stats_cpu_t structures.
@@ -104,5 +106,5 @@
  */
 static void *get_stats_cpus(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	*size = sizeof(stats_cpu_t) * config.cpu_count;
@@ -293,4 +295,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data containing several stats_task_t structures.
@@ -299,5 +302,5 @@
  */
 static void *get_stats_tasks(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	/* Messing with task structures, avoid deadlock */
@@ -398,4 +401,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data containing several stats_task_t structures.
@@ -404,5 +408,5 @@
  */
 static void *get_stats_threads(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	/* Messing with threads structures, avoid deadlock */
@@ -590,4 +594,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data containing several stats_exc_t structures.
@@ -596,5 +601,5 @@
  */
 static void *get_stats_exceptions(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	*size = sizeof(stats_exc_t) * IVT_ITEMS;
@@ -711,4 +716,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data containing stats_physmem_t.
@@ -717,5 +723,5 @@
  */
 static void *get_stats_physmem(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	*size = sizeof(stats_physmem_t);
@@ -741,4 +747,5 @@
  * @param size    Size of the returned data.
  * @param dry_run Do not get the data, just calculate the size.
+ * @param data    Unused.
  *
  * @return Data several load_t values.
@@ -747,5 +754,5 @@
  */
 static void *get_stats_load(struct sysinfo_item *item, size_t *size,
-    bool dry_run)
+    bool dry_run, void *data)
 {
 	*size = sizeof(load_t) * LOAD_STEPS;
@@ -816,11 +823,11 @@
 	mutex_initialize(&load_lock, MUTEX_PASSIVE);
 	
-	sysinfo_set_item_fn_val("system.uptime", NULL, get_stats_uptime);
-	sysinfo_set_item_fn_data("system.cpus", NULL, get_stats_cpus);
-	sysinfo_set_item_fn_data("system.physmem", NULL, get_stats_physmem);
-	sysinfo_set_item_fn_data("system.load", NULL, get_stats_load);
-	sysinfo_set_item_fn_data("system.tasks", NULL, get_stats_tasks);
-	sysinfo_set_item_fn_data("system.threads", NULL, get_stats_threads);
-	sysinfo_set_item_fn_data("system.exceptions", NULL, get_stats_exceptions);
+	sysinfo_set_item_gen_val("system.uptime", NULL, get_stats_uptime, NULL);
+	sysinfo_set_item_gen_data("system.cpus", NULL, get_stats_cpus, NULL);
+	sysinfo_set_item_gen_data("system.physmem", NULL, get_stats_physmem, NULL);
+	sysinfo_set_item_gen_data("system.load", NULL, get_stats_load, NULL);
+	sysinfo_set_item_gen_data("system.tasks", NULL, get_stats_tasks, NULL);
+	sysinfo_set_item_gen_data("system.threads", NULL, get_stats_threads, NULL);
+	sysinfo_set_item_gen_data("system.exceptions", NULL, get_stats_exceptions, NULL);
 	sysinfo_set_subtree_fn("system.tasks", NULL, get_stats_task, NULL);
 	sysinfo_set_subtree_fn("system.threads", NULL, get_stats_thread, NULL);
Index: kernel/generic/src/sysinfo/sysinfo.c
===================================================================
--- kernel/generic/src/sysinfo/sysinfo.c	(revision efb8d156b56b92ac4b5ad3fef94eea065ccc4333)
+++ kernel/generic/src/sysinfo/sysinfo.c	(revision 196c2530df71f9f2878804f3f8971bb545304e28)
@@ -1,4 +1,5 @@
 /*
  * Copyright (c) 2006 Jakub Vana
+ * Copyright (c) 2012 Martin Decky
  * All rights reserved.
  *
@@ -358,8 +359,9 @@
  *             a new root item (NULL for global sysinfo root).
  * @param fn   Numeric value generator function.
- *
- */
-void sysinfo_set_item_fn_val(const char *name, sysinfo_item_t **root,
-    sysinfo_fn_val_t fn)
+ * @param data Private data.
+ *
+ */
+void sysinfo_set_item_gen_val(const char *name, sysinfo_item_t **root,
+    sysinfo_fn_val_t fn, void *data)
 {
 	/* Protect sysinfo tree consistency */
@@ -372,5 +374,6 @@
 	if (item != NULL) {
 		item->val_type = SYSINFO_VAL_FUNCTION_VAL;
-		item->val.fn_val = fn;
+		item->val.gen_val.fn = fn;
+		item->val.gen_val.data = data;
 	}
 	
@@ -389,8 +392,9 @@
  *             a new root item (NULL for global sysinfo root).
  * @param fn   Binary data generator function.
- *
- */
-void sysinfo_set_item_fn_data(const char *name, sysinfo_item_t **root,
-    sysinfo_fn_data_t fn)
+ * @param data Private data.
+ *
+ */
+void sysinfo_set_item_gen_data(const char *name, sysinfo_item_t **root,
+    sysinfo_fn_data_t fn, void *data)
 {
 	/* Protect sysinfo tree consistency */
@@ -403,5 +407,6 @@
 	if (item != NULL) {
 		item->val_type = SYSINFO_VAL_FUNCTION_DATA;
-		item->val.fn_data = fn;
+		item->val.gen_data.fn = fn;
+		item->val.gen_data.data = data;
 	}
 	
@@ -512,5 +517,5 @@
 			break;
 		case SYSINFO_VAL_FUNCTION_VAL:
-			val = cur->val.fn_val(cur);
+			val = cur->val.gen_val.fn(cur, cur->val.gen_val.data);
 			printf(" -> %" PRIun" (%#" PRIxn ") [generated]\n", val,
 			    val);
@@ -518,5 +523,6 @@
 		case SYSINFO_VAL_FUNCTION_DATA:
 			/* N.B.: No data was actually returned (only a dry run) */
-			(void) cur->val.fn_data(cur, &size, true);
+			(void) cur->val.gen_data.fn(cur, &size, true,
+			    cur->val.gen_data.data);
 			printf(" (%zu bytes) [generated]\n", size);
 			break;
@@ -604,9 +610,9 @@
 			break;
 		case SYSINFO_VAL_FUNCTION_VAL:
-			ret.val = item->val.fn_val(item);
+			ret.val = item->val.gen_val.fn(item, item->val.gen_val.data);
 			break;
 		case SYSINFO_VAL_FUNCTION_DATA:
-			ret.data.data = item->val.fn_data(item, &ret.data.size,
-			    dry_run);
+			ret.data.data = item->val.gen_data.fn(item, &ret.data.size,
+			    dry_run, item->val.gen_data.data);
 			break;
 		}