[PATCH 0/4] locking/ww_mutex: Fix locktorture ww_mutex test problems

Waiman Long
2021-03-16T15:32:47Z

It was found that lockdep splat was produced whenever the ww_mutex
locktorture test was run on a kernel with lockdep enabled. It turns out
that there are bugs both in the ww_mutex and the locktorture code. This
patch series fix these bugs so that the ww_mutex locktorture test is
able to run without producing unexpected lockdep splat.

Patches 1 & 2 are clean-up patches for ww_mutex. Patch 3 fixes the lockdep
bug in ww_mutex and patch 4 fixes a bug in the locktorture code.

Waiman Long (4):
locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling
locking/ww_mutex: Fix acquire/release imbalance in
ww_acquire_init()/ww_acquire_fini()
locking/ww_mutex: Treat ww_mutex_lock() like a trylock
locking/locktorture: Fix incorrect use of ww_acquire_ctx in ww_mutex
test

include/linux/ww_mutex.h | 5 ++-
kernel/locking/locktorture.c | 86 +++++++++++++++++++++++-------------
kernel/locking/mutex.c | 30 ++++++++-----
3 files changed, 77 insertions(+), 44 deletions(-)

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2.18.1