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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>
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/*
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* RT-Mutexes: blocking mutual exclusion locks with PI support
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*
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* started by Ingo Molnar and Thomas Gleixner:
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*
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* Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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* Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
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*
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* This file contains macros used solely by rtmutex.c.
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* Non-debug version.
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*/
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#define rt_mutex_deadlock_check(l) (0)
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#define rt_mutex_deadlock_account_lock(m, t) do { } while (0)
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#define rt_mutex_deadlock_account_unlock(l) do { } while (0)
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#define debug_rt_mutex_init_waiter(w) do { } while (0)
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#define debug_rt_mutex_free_waiter(w) do { } while (0)
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#define debug_rt_mutex_lock(l) do { } while (0)
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#define debug_rt_mutex_proxy_lock(l,p) do { } while (0)
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#define debug_rt_mutex_proxy_unlock(l) do { } while (0)
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#define debug_rt_mutex_unlock(l) do { } while (0)
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#define debug_rt_mutex_init(m, n) do { } while (0)
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#define debug_rt_mutex_deadlock(d, a ,l) do { } while (0)
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#define debug_rt_mutex_print_deadlock(w) do { } while (0)
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#define debug_rt_mutex_reset_waiter(w) do { } while (0)
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static inline void rt_mutex_print_deadlock(struct rt_mutex_waiter *w)
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{
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WARN(1, "rtmutex deadlock detected\n");
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}
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static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *w,
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enum rtmutex_chainwalk walk)
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{
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return walk == RT_MUTEX_FULL_CHAINWALK;
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}
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