The below commit introduces a dummy lockdep map, but didn't get the initialization quite right (it should mimic the initialization of the real ww_mutex lockdep maps). It also introduced a separate locking api selftest failure. Fix these. Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Waiman Long <longman@xxxxxxxxxx> Cc: Boqun Feng <boqun.feng@xxxxxxxxx> Cc: Maarten Lankhorst <maarten@xxxxxxxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Suggested-by: Boqun Feng <boqun.feng@xxxxxxxxx> Reported-by: Boqun Feng <boqun.feng@xxxxxxxxx> Closes: https://lore.kernel.org/lkml/Zw19sMtnKdyOVQoh@boqun-archlinux/ Fixes: 823a566221a5 ("locking/ww_mutex: Adjust to lockdep nest_lock requirements") Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx> --- include/linux/ww_mutex.h | 4 ++-- lib/locking-selftest.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/ww_mutex.h b/include/linux/ww_mutex.h index a401a2f31a77..45ff6f7a872b 100644 --- a/include/linux/ww_mutex.h +++ b/include/linux/ww_mutex.h @@ -156,8 +156,8 @@ static inline void ww_acquire_init(struct ww_acquire_ctx *ctx, debug_check_no_locks_freed((void *)ctx, sizeof(*ctx)); lockdep_init_map(&ctx->dep_map, ww_class->acquire_name, &ww_class->acquire_key, 0); - lockdep_init_map(&ctx->first_lock_dep_map, ww_class->mutex_name, - &ww_class->mutex_key, 0); + lockdep_init_map_wait(&ctx->first_lock_dep_map, ww_class->mutex_name, + &ww_class->mutex_key, 0, LD_WAIT_SLEEP); mutex_acquire(&ctx->dep_map, 0, 0, _RET_IP_); mutex_acquire_nest(&ctx->first_lock_dep_map, 0, 0, &ctx->dep_map, _RET_IP_); #endif diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index 6e0c019f71b6..ed99344317f5 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -1720,8 +1720,6 @@ static void ww_test_normal(void) { int ret; - WWAI(&t); - /* * None of the ww_mutex codepaths should be taken in the 'normal' * mutex calls. The easiest way to verify this is by using the @@ -1770,6 +1768,8 @@ static void ww_test_normal(void) ww_mutex_base_unlock(&o.base); WARN_ON(o.ctx != (void *)~0UL); + WWAI(&t); + /* nest_lock */ o.ctx = (void *)~0UL; ww_mutex_base_lock_nest_lock(&o.base, &t); -- 2.47.0
