mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
8930ed80f9
The conditions under which deadlock detection is conducted are unclear and undocumented. Add constants instead of using 0/1 and provide a selection function which hides the additional debug dependency from the calling code. Add comments where needed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Link: http://lkml.kernel.org/r/20140522031949.947264874@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
/*
|
|
* RT-Mutexes: blocking mutual exclusion locks with PI support
|
|
*
|
|
* started by Ingo Molnar and Thomas Gleixner:
|
|
*
|
|
* Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
|
* Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
|
|
*
|
|
* This file contains macros used solely by rtmutex.c. Debug version.
|
|
*/
|
|
|
|
extern void
|
|
rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task);
|
|
extern void rt_mutex_deadlock_account_unlock(struct task_struct *task);
|
|
extern void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter);
|
|
extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
|
|
extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name);
|
|
extern void debug_rt_mutex_lock(struct rt_mutex *lock);
|
|
extern void debug_rt_mutex_unlock(struct rt_mutex *lock);
|
|
extern void debug_rt_mutex_proxy_lock(struct rt_mutex *lock,
|
|
struct task_struct *powner);
|
|
extern void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock);
|
|
extern void debug_rt_mutex_deadlock(enum rtmutex_chainwalk chwalk,
|
|
struct rt_mutex_waiter *waiter,
|
|
struct rt_mutex *lock);
|
|
extern void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter);
|
|
# define debug_rt_mutex_reset_waiter(w) \
|
|
do { (w)->deadlock_lock = NULL; } while (0)
|
|
|
|
static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *waiter,
|
|
enum rtmutex_chainwalk walk)
|
|
{
|
|
return (waiter != NULL);
|
|
}
|
|
|
|
static inline void rt_mutex_print_deadlock(struct rt_mutex_waiter *w)
|
|
{
|
|
debug_rt_mutex_print_deadlock(w);
|
|
}
|