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linux-2.6
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rtmutex: Cleanup the debug code 

Use the existing lock debugging macros.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-06-08 09:58:38 +02:00
parent d0a77454c7
commit 0fa914c632
1 changed files with 10 additions and 65 deletions
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75
kernel/rtmutex-debug.c
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@ -29,61 +29,6 @@
#include "rtmutex_common.h"
# define TRACE_WARN_ON(x) WARN_ON(x)
# define TRACE_BUG_ON(x) BUG_ON(x)
# define TRACE_OFF() \
do { \
if (rt_trace_on) { \
rt_trace_on = 0; \
console_verbose(); \
if (raw_spin_is_locked(&current->pi_lock)) \
raw_spin_unlock(&current->pi_lock); \
} \
} while (0)
# define TRACE_OFF_NOLOCK() \
do { \
if (rt_trace_on) { \
rt_trace_on = 0; \
console_verbose(); \
} \
} while (0)
# define TRACE_BUG_LOCKED() \
do { \
TRACE_OFF(); \
BUG(); \
} while (0)
# define TRACE_WARN_ON_LOCKED(c) \
do { \
if (unlikely(c)) { \
TRACE_OFF(); \
WARN_ON(1); \
} \
} while (0)
# define TRACE_BUG_ON_LOCKED(c) \
do { \
if (unlikely(c)) \
TRACE_BUG_LOCKED(); \
} while (0)
#ifdef CONFIG_SMP
# define SMP_TRACE_BUG_ON_LOCKED(c) TRACE_BUG_ON_LOCKED(c)
#else
# define SMP_TRACE_BUG_ON_LOCKED(c) do { } while (0)
#endif
/*
* deadlock detection flag. We turn it off when we detect
* the first problem because we dont want to recurse back
* into the tracing code when doing error printk or
* executing a BUG():
*/
static int rt_trace_on = 1;
static void printk_task(struct task_struct *p)
{
if (p)
@ -111,8 +56,8 @@ static void printk_lock(struct rt_mutex *lock, int print_owner)
void rt_mutex_debug_task_free(struct task_struct *task)
{
WARN_ON(!plist_head_empty(&task->pi_waiters));
WARN_ON(task->pi_blocked_on);
DEBUG_LOCKS_WARN_ON(!plist_head_empty(&task->pi_waiters));
DEBUG_LOCKS_WARN_ON(task->pi_blocked_on);
}
/*
@ -125,7 +70,7 @@ void debug_rt_mutex_deadlock(int detect, struct rt_mutex_waiter *act_waiter,
{
struct task_struct *task;
if (!rt_trace_on || detect || !act_waiter)
if (!debug_locks || detect || !act_waiter)
return;
task = rt_mutex_owner(act_waiter->lock);
@ -139,7 +84,7 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
{
struct task_struct *task;
if (!waiter->deadlock_lock || !rt_trace_on)
if (!waiter->deadlock_lock || !debug_locks)
return;
rcu_read_lock();
@ -149,7 +94,8 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
return;
}
TRACE_OFF_NOLOCK();
if (!debug_locks_off())
return;
printk("\n============================================\n");
printk( "[ BUG: circular locking deadlock detected! ]\n");
@ -180,7 +126,6 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
printk("[ turning off deadlock detection."
"Please report this trace. ]\n\n");
local_irq_disable();
}
void debug_rt_mutex_lock(struct rt_mutex *lock)
@ -189,7 +134,7 @@ void debug_rt_mutex_lock(struct rt_mutex *lock)
void debug_rt_mutex_unlock(struct rt_mutex *lock)
{
TRACE_WARN_ON_LOCKED(rt_mutex_owner(lock) != current);
DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current);
}
void
@ -199,7 +144,7 @@ debug_rt_mutex_proxy_lock(struct rt_mutex *lock, struct task_struct *powner)
void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock)
{
TRACE_WARN_ON_LOCKED(!rt_mutex_owner(lock));
DEBUG_LOCKS_WARN_ON(!rt_mutex_owner(lock));
}
void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter)
@ -213,8 +158,8 @@ void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter)
void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter)
{
put_pid(waiter->deadlock_task_pid);
TRACE_WARN_ON(!plist_node_empty(&waiter->list_entry));
TRACE_WARN_ON(!plist_node_empty(&waiter->pi_list_entry));
DEBUG_LOCKS_WARN_ON(!plist_node_empty(&waiter->list_entry));
DEBUG_LOCKS_WARN_ON(!plist_node_empty(&waiter->pi_list_entry));
memset(waiter, 0x22, sizeof(*waiter));
}