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https://github.com/joel16/android_kernel_sony_msm8994.git
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9a11b49a80
Generic lock debugging:
- generalized lock debugging framework. For example, a bug in one lock
subsystem turns off debugging in all lock subsystems.
- got rid of the caller address passing (__IP__/__IP_DECL__/etc.) from
the mutex/rtmutex debugging code: it caused way too much prototype
hackery, and lockdep will give the same information anyway.
- ability to do silent tests
- check lock freeing in vfree too.
- more finegrained debugging options, to allow distributions to
turn off more expensive debugging features.
There's no separate 'held mutexes' list anymore - but there's a 'held locks'
stack within lockdep, which unifies deadlock detection across all lock
classes. (this is independent of the lockdep validation stuff - lockdep first
checks whether we are holding a lock already)
Here are the current debugging options:
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
which do:
config DEBUG_MUTEXES
bool "Mutex debugging, basic checks"
config DEBUG_LOCK_ALLOC
bool "Detect incorrect freeing of live mutexes"
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
27 lines
1.1 KiB
C
27 lines
1.1 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_detect_deadlock(w,d) (d)
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#define debug_rt_mutex_reset_waiter(w) do { } while (0)
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