Peter Zijlstra f6f48e1804 lockdep: Teach lockdep about "USED" <- "IN-NMI" inversions ... nmi_enter() does lockdep_off() and hence lockdep ignores everything. And NMI context makes it impossible to do full IN-NMI tracking like we do IN-HARDIRQ, that could result in graph_lock recursion. However, since look_up_lock_class() is lockless, we can find the class of a lock that has prior use and detect IN-NMI after USED, just not USED after IN-NMI. NOTE: By shifting the lockdep_off() recursion count to bit-16, we can easily differentiate between actual recursion and off. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Link: https://lkml.kernel.org/r/20200221134215.090538203@infradead.org		2020-03-20 13:06:25 +01:00
..
Makefile	locking/rwsem: Merge rwsem.h and rwsem-xadd.c into rwsem.c	2019-06-17 12:27:57 +02:00
lock_events.c	locking/lock_events: Don't show pvqspinlock events on bare metal	2019-04-10 10:56:05 +02:00
lock_events.h	locking/lock_events: Use raw_cpu_{add,inc}() for stats	2019-06-03 12:32:56 +02:00
lock_events_list.h	locking/rwsem: Adaptive disabling of reader optimistic spinning	2019-06-17 12:28:09 +02:00
lockdep.c	lockdep: Teach lockdep about "USED" <- "IN-NMI" inversions	2020-03-20 13:06:25 +01:00
lockdep_internals.h	locking/lockdep: Reuse freed chain_hlocks entries	2020-02-11 13:10:52 +01:00
lockdep_proc.c	locking/lockdep: Reuse freed chain_hlocks entries	2020-02-11 13:10:52 +01:00
lockdep_states.h	locking/lockdep: Rework FS_RECLAIM annotation	2017-08-10 12:29:03 +02:00
locktorture.c	locking: locktorture: Do not include rwlock.h directly	2019-10-05 11:50:24 -07:00
mcs_spinlock.h	locking/mcs: Use smp_cond_load_acquire() in MCS spin loop	2018-04-27 09:48:49 +02:00
mutex-debug.c	locking/mutex: Replace spin_is_locked() with lockdep	2018-11-12 09:06:22 -08:00
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	Revert "locking/mutex: Complain upon mutex API misuse in IRQ contexts"	2019-12-11 00:27:43 +01:00
mutex.h	mutex: Fix up mutex_waiter usage	2019-08-08 09:09:25 +02:00
osq_lock.c	locking/osq: Use optimized spinning loop for arm64	2020-01-17 10:19:30 +01:00
percpu-rwsem.c	locking/percpu-rwsem: Add might_sleep() for writer locking	2020-02-11 13:11:02 +01:00
qrwlock.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
qspinlock.c	locking/qspinlock: Fix inaccessible URL of MCS lock paper	2020-01-17 10:19:30 +01:00
qspinlock_paravirt.h	Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"	2019-09-25 10:22:37 +02:00
qspinlock_stat.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
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	locking/lockdep: Remove unused @nested argument from lock_release()	2019-10-09 12:46:10 +02:00
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	locking/rtmutex: Handle non enqueued waiters gracefully in remove_waiter()	2018-03-28 23:01:30 +02:00
rwsem.c	locking/rwsem: Remove RWSEM_OWNER_UNKNOWN	2020-02-11 13:10:57 +01:00
rwsem.h	locking/percpu-rwsem: Remove the embedded rwsem	2020-02-11 13:10:56 +01:00
semaphore.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 436	2019-06-05 17:37:17 +02:00
spinlock.c	asm-generic/mmiowb: Add generic implementation of mmiowb() tracking	2019-04-08 11:59:39 +01:00
spinlock_debug.c	locking/spinlock/debug: Fix various data races	2019-11-29 08:03:27 +01:00
test-ww_mutex.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 9	2019-05-21 11:28:40 +02:00