linux-stable/kernel/locking
Chris Wilson 1cd492f839 locking/lockdep: Fix overflow in presentation of average lock-time
[ Upstream commit a7ef9b28aa ]

Though the number of lock-acquisitions is tracked as unsigned long, this
is passed as the divisor to div_s64() which interprets it as a s32,
giving nonsense values with more than 2 billion acquisitons. E.g.

  acquisitions   holdtime-min   holdtime-max holdtime-total   holdtime-avg
  -------------------------------------------------------------------------
    2350439395           0.07         353.38   649647067.36          0.-32

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20200725185110.11588-1-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-03 11:22:27 +02:00
..
lockdep.c locking/lockdep: Avoid recursion in lockdep_count_{for,back}ward_deps() 2020-04-24 08:00:29 +02:00
lockdep_internals.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lockdep_proc.c locking/lockdep: Fix overflow in presentation of average lock-time 2020-09-03 11:22:27 +02:00
lockdep_states.h locking/lockdep: Rework FS_RECLAIM annotation 2017-08-10 12:29:03 +02:00
locktorture.c locktorture: Print ratio of acquisitions, not failures 2020-04-24 08:01:23 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcs_spinlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mutex-debug.c locking/mutex: Rework mutex::owner 2016-10-25 11:31:50 +02:00
mutex-debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mutex.c mutex, futex: adjust kernel-doc markups to generate ReST 2017-05-16 08:43:25 -03:00
mutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
osq_lock.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
percpu-rwsem.c locking/percpu-rwsem: Replace waitqueue with rcuwait 2017-01-14 11:14:35 +01:00
qrwlock.c kernel/locking: Fix compile error with qrwlock.c 2017-05-25 12:06:50 -07:00
qspinlock.c locking/qspinlock, x86: Provide liveness guarantee 2018-12-21 14:13:09 +01:00
qspinlock_paravirt.h Revert "locking/pvqspinlock: Don't wait if vCPU is preempted" 2019-10-11 18:18:36 +02:00
qspinlock_stat.h sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
rtmutex-debug.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rtmutex-debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rtmutex.c futex: Handle early deadlock return correctly 2019-02-12 19:46:12 +01:00
rtmutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rtmutex_common.h futex: Avoid violating the 10th rule of futex 2018-01-23 19:58:11 +01:00
rwsem-spinlock.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rwsem-xadd.c locking/rwsem: Prevent decrement of reader count before increment 2019-05-21 18:50:12 +02:00
rwsem.c locking/rwsem: Add a new RWSEM_ANONYMOUSLY_OWNED flag 2018-06-21 04:03:00 +09:00
rwsem.h locking/rwsem: Add a new RWSEM_ANONYMOUSLY_OWNED flag 2018-06-21 04:03:00 +09:00
semaphore.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
spinlock.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock_debug.c locking/spinlock/debug: Fix various data races 2020-01-12 12:11:49 +01:00
test-ww_mutex.c locking/ww_mutex: Fix runtime warning in the WW mutex selftest 2018-11-04 14:52:41 +01:00