linux-sg2042/include
Bart Van Assche a0b0fd53e1 locking/lockdep: Free lock classes that are no longer in use
Instead of leaving lock classes that are no longer in use in the
lock_classes array, reuse entries from that array that are no longer in
use. Maintain a linked list of free lock classes with list head
'free_lock_class'. Only add freed lock classes to the free_lock_classes
list after a grace period to avoid that a lock_classes[] element would
be reused while an RCU reader is accessing it. Since the lockdep
selftests run in a context where sleeping is not allowed and since the
selftests require that lock resetting/zapping works with debug_locks
off, make the behavior of lockdep_free_key_range() and
lockdep_reset_lock() depend on whether or not these are called from
the context of the lockdep selftests.

Thanks to Peter for having shown how to modify get_pending_free()
such that that function does not have to sleep.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20190214230058.196511-12-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-02-28 07:55:43 +01:00
..
acpi Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-12-26 17:03:51 -08:00
asm-generic Merge branch 'linus' into locking/core, to pick up fixes 2019-02-28 07:50:39 +01:00
clocksource
crypto crypto: skcipher - remove remnants of internal IV generators 2018-12-23 11:52:45 +08:00
drm Merge tag 'drm-intel-fixes-2019-01-11' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes 2019-01-11 10:26:21 +01:00
dt-bindings ARM: SoC fixes for linux-5.0 2019-02-08 16:23:41 -08:00
keys KEYS: user: Align the payload buffer 2019-02-22 10:11:19 -08:00
kvm KVM: arm/arm64: vgic: Make vgic_cpu->ap_list_lock a raw_spinlock 2019-01-24 15:09:09 +01:00
linux locking/lockdep: Free lock classes that are no longer in use 2019-02-28 07:55:43 +01:00
math-emu
media media fixes for v4.20-rc8 2018-12-25 13:11:30 -08:00
memory
misc
net phonet: fix building with clang 2019-02-21 16:23:56 -08:00
pcmcia
ras
rdma RDMA/device: Expose ib_device_try_get(() 2019-01-21 14:33:08 -07:00
scsi 4.21 merge window pull request 2018-12-28 14:57:10 -08:00
soc ARM: SoC driver updates 2018-12-31 17:32:35 -08:00
sound ALSA: compress: Fix stop handling on compressed capture streams 2019-02-05 22:01:41 +01:00
target scsi: target: consistently null-terminate t10_wwn strings 2018-12-07 21:54:33 -05:00
trace afs: Fix race in async call refcounting 2019-01-17 15:17:28 +00:00
uapi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-02-15 08:00:11 -08:00
video drm/exynos: fimd: Make pixel blend mode configurable 2018-12-14 15:46:15 +09:00
xen arm64/xen: fix xen-swiotlb cache flushing 2019-01-23 22:14:56 +01:00