AuxXxilium/linux_dsm_epyc7002
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d48e385003
linux_dsm_epyc7002/kernel/locking
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Peter Zijlstra d48e385003 locking/lockdep: Remove more raw_cpu_read() usage 
I initially thought raw_cpu_read() was OK, since if it is !0 we have
IRQs disabled and can't get migrated, so if we get migrated both CPUs
must have 0 and it doesn't matter which 0 we read.

And while that is true; it isn't the whole store, on pretty much all
architectures (except x86) this can result in computing the address for
one CPU, getting migrated, the old CPU continuing execution with another
task (possibly setting recursion) and then the new CPU reading the value
of the old CPU, which is no longer 0.

Similer to:

  baffd723e4 ("lockdep: Revert "lockdep: Use raw_cpu_*() for per-cpu variables"")

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201026152256.GB2651@hirez.programming.kicks-ass.net
2020-10-30 17:07:18 +01:00
..
lock_events_list.h locking/rwsem: Adaptive disabling of reader optimistic spinning 2019-06-17 12:28:09 +02:00
lock_events.c
lock_events.h locking/lock_events: Use raw_cpu_{add,inc}() for stats 2019-06-03 12:32:56 +02:00
lockdep_internals.h lockdep: Fix usage_traceoverflow 2020-10-09 08:53:08 +02:00
lockdep_proc.c locking/lockdep: Fix overflow in presentation of average lock-time 2020-07-25 21:47:42 +02:00
lockdep_states.h
lockdep.c locking/lockdep: Remove more raw_cpu_read() usage 2020-10-30 17:07:18 +01:00
locktorture.c This tree adds the sched_set_fifo*() encapsulation APIs to remove 2020-08-06 11:55:43 -07:00
Makefile kcsan: Make KCSAN compatible with lockdep 2020-03-21 09:41:16 +01:00
mcs_spinlock.h
mutex-debug.c lockdep: Introduce wait-type checks 2020-03-21 16:00:24 +01:00
mutex-debug.h
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_lock: Annotate a data race in osq_lock 2020-06-29 12:04:48 -07:00
percpu-rwsem.c locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count 2020-09-16 16:26:56 +02:00
qrwlock.c
qspinlock_paravirt.h Revert "locking/pvqspinlock: Don't wait if vCPU is preempted" 2019-09-25 10:22:37 +02:00
qspinlock_stat.h
qspinlock.c x86/kvm: Add "nopvspin" parameter to disable PV spinlocks 2020-07-08 16:21:57 -04:00
rtmutex_common.h
rtmutex-debug.c kernel: rename show_stack_loglvl() => show_stack() 2020-06-09 09:39:13 -07:00
rtmutex-debug.h
rtmutex.c locking/rtmutex: Remove unused rt_mutex_cmpxchg_relaxed() 2020-04-27 12:26:40 +02:00
rtmutex.h
rwsem.c lockdep: Introduce wait-type checks 2020-03-21 16:00:24 +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_debug.c lockdep: Introduce wait-type checks 2020-03-21 16:00:24 +01:00
spinlock.c
test-ww_mutex.c