debugobjects: print more data

index 597692f..89f115e 100644
@@ -34,7 +34,9 @@ struct debug_obj {
 
 /**
  * struct debug_obj_descr - object type specific debug description structure
+ *
  * @name:		name of the object typee
+ * @print:		function printing extra debug data
  * @fixup_init:		fixup function, which is called when the init check
  *			fails
  * @fixup_activate:	fixup function, which is called when the activate check

@@ -46,7 +48,7 @@ struct debug_obj {
  */
 struct debug_obj_descr {
 	const char		*name;
-
+	void (*print)		(void *addr);
 	int (*fixup_init)	(void *addr, enum debug_obj_state state);
 	int (*fixup_activate)	(void *addr, enum debug_obj_state state);
 	int (*fixup_destroy)	(void *addr, enum debug_obj_state state);

index d8e9b3d..dee0148 100644
@@ -8,6 +8,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/stddef.h>
+#include <linux/module.h>
 
 #define KSYM_NAME_LEN 128
 #define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \

index 0c8d7c0..ea518c4 100644
@@ -334,6 +334,14 @@ EXPORT_SYMBOL_GPL(ktime_add_safe);
 
 static struct debug_obj_descr hrtimer_debug_descr;
 
+void hrtimer_debug_print(void *addr)
+{
+	struct hrtimer *hrtimer = addr;
+
+	printk(KERN_ERR "ODEBUG hrtimer: %p function: %pS\n",
+	       hrtimer, hrtimer->function);
+}
+
 /*
  * fixup_init is called when:
  * - an active object is initialized

@@ -393,6 +401,7 @@ static int hrtimer_fixup_free(void *addr, enum debug_obj_state state)
 
 static struct debug_obj_descr hrtimer_debug_descr = {
 	.name		= "hrtimer",
+	.print		= hrtimer_debug_print,
 	.fixup_init	= hrtimer_fixup_init,
 	.fixup_activate	= hrtimer_fixup_activate,
 	.fixup_free	= hrtimer_fixup_free,

index d645992..7d2b7ee 100644
@@ -404,6 +404,14 @@ static void timer_stats_account_timer(struct timer_list *timer) {}
 
 static struct debug_obj_descr timer_debug_descr;
 
+void timer_debug_print(void *addr)
+{
+	struct timer_list *timer = addr;
+
+	printk(KERN_ERR "ODEBUG timer_list: %p function: %pS\n",
+	       timer, timer->function);
+}
+
 /*
  * fixup_init is called when:
  * - an active object is initialized

@@ -477,6 +485,7 @@ static int timer_fixup_free(void *addr, enum debug_obj_state state)
 
 static struct debug_obj_descr timer_debug_descr = {
 	.name		= "timer_list",
+	.print		= timer_debug_print,
 	.fixup_init	= timer_fixup_init,
 	.fixup_activate	= timer_fixup_activate,
 	.fixup_free	= timer_fixup_free,

index 11869fa..e4d6a4c 100644
@@ -314,6 +314,13 @@ static inline int __next_wq_cpu(int cpu, const struct cpumask *mask,
 
 static struct debug_obj_descr work_debug_descr;
 
+void work_debug_print(void *addr)
+{
+	struct work_struct *work = addr;
+
+	printk(KERN_ERR "ODEBUG work_struct: %p func: %pS\n", work, work->func);
+}
+
 /*
  * fixup_init is called when:
  * - an active object is initialized

@@ -385,6 +392,7 @@ static int work_fixup_free(void *addr, enum debug_obj_state state)
 
 static struct debug_obj_descr work_debug_descr = {
 	.name		= "work_struct",
+	.print		= work_debug_print,
 	.fixup_init	= work_fixup_init,
 	.fixup_activate	= work_fixup_activate,
 	.fixup_free	= work_fixup_free,

index deebcc5..d5fcdeb 100644
@@ -14,6 +14,7 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/hash.h>
+#include <linux/kallsyms.h>
 
 #define ODEBUG_HASH_BITS	14
 #define ODEBUG_HASH_SIZE	(1 << ODEBUG_HASH_BITS)

@@ -253,10 +254,13 @@ static void debug_print_object(struct debug_obj *obj, char *msg)
 
 	if (limit < 5 && obj->descr != descr_test) {
 		limit++;
-		WARN(1, KERN_ERR "ODEBUG: %s %s (active state %u) "
-				 "object type: %s\n",
+		printk(KERN_ERR "ODEBUG: %s %s (active state %u) "
+				"object type: %s\n",
 			msg, obj_states[obj->state], obj->astate,
 			obj->descr->name);
+		dump_stack();
+		if (obj->descr->print)
+			obj->descr->print(obj->object);
 	}
 	debug_objects_warnings++;
 }