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8f21098431
Add an 8 bit small sequence counter to the held_lock struct to detect if the lock as been dropped and reacquired. This is useful when a data structure depends on a constant locking context, but is not able to detect locking and unlocking of the lock through its own API. Since the __lock_unpin_lock() will no longer detect underflow by casting the unsigned int to a signed int, update the casting code to use a temp variable for calculations using a signed int. Link: https://lore.kernel.org/20260821192627.4085470-3-liam@infradead.org Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org> Suggested-by: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Will Deacon <will@kernel.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Waiman Long <longman@redhat.com> Link: https://lore.kernel.org/all/h3tpnj5kzcrxms5picmimtkpg4aypcpip5wbd6bt2rpdj5k7eb@nhtzs3lefrkq/ Cc: Breno Leitao <leitao@debian.org> Cc: Chris Mason <clm@meta.com> Cc: Chuck Lever <cel@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Joe Perches <joe@perches.com> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| irqflag-debug.c | ||
| lock_events_list.h | ||
| lock_events.c | ||
| lock_events.h | ||
| lockdep_internals.h | ||
| lockdep_proc.c | ||
| lockdep_states.h | ||
| lockdep.c | ||
| locktorture.c | ||
| Makefile | ||
| mcs_spinlock.h | ||
| mutex-debug.c | ||
| mutex.c | ||
| mutex.h | ||
| osq_lock.c | ||
| percpu-rwsem.c | ||
| qrwlock.c | ||
| qspinlock_paravirt.h | ||
| qspinlock_stat.h | ||
| qspinlock.c | ||
| qspinlock.h | ||
| rtmutex_api.c | ||
| rtmutex_common.h | ||
| rtmutex.c | ||
| rwbase_rt.c | ||
| rwsem.c | ||
| semaphore.c | ||
| spinlock_debug.c | ||
| spinlock_rt.c | ||
| spinlock.c | ||
| test-ww_mutex.c | ||
| ww_mutex.h | ||
| ww_rt_mutex.c | ||