Tetsuo Handa b3c39758c8 lockdep: Make the lock debug output more useful ... The lock debug output in print_lock() has a few shortcomings: - It prints the hlock->acquire_ip field in %px and %pS format. That's redundant information. - It lacks information about the lock object itself. The lock class is not helpful to identify a particular instance of a lock. Change the output so it prints: - hlock->instance to allow identification of a particular lock instance. - only the %pS format of hlock->ip_acquire which is sufficient to decode the actual code line with faddr2line. The resulting output is: 3 locks held by a.out/31106: #0: 00000000b0f753ba (&mm->mmap_sem){++++}, at: copy_process.part.41+0x10d5/0x1fe0 #1: 00000000ef64d539 (&mm->mmap_sem/1){+.+.}, at: copy_process.part.41+0x10fe/0x1fe0 #2: 00000000b41a282e (&mapping->i_mmap_rwsem){++++}, at: copy_process.part.41+0x12f2/0x1fe0 [ tglx: Massaged changelog ] Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: linux-mm@kvack.org Cc: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/201803271941.GBE57310.tVSOJLQOFFOHFM@I-love.SAKURA.ne.jp		2018-03-29 14:41:40 +02:00
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lockdep.c	lockdep: Make the lock debug output more useful	2018-03-29 14:41:40 +02:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
locktorture.c
Makefile
mcs_spinlock.h
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
osq_lock.c
percpu-rwsem.c
qrwlock.c
qspinlock.c	locking/qspinlock: Ensure node->count is updated before initialising node	2018-02-13 14:50:14 +01:00
qspinlock_paravirt.h
qspinlock_stat.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex.c	locking/rtmutex: Handle non enqueued waiters gracefully in remove_waiter()	2018-03-28 23:01:30 +02:00
rtmutex.h
rtmutex_common.h	locking/rtmutex: Handle non enqueued waiters gracefully in remove_waiter()	2018-03-28 23:01:30 +02:00
rwsem-spinlock.c
rwsem-xadd.c
rwsem.c
rwsem.h
semaphore.c
spinlock.c
spinlock_debug.c
test-ww_mutex.c