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authorYuyang Du <duyuyang@gmail.com>2019-05-06 16:19:23 +0800
committerIngo Molnar <mingo@kernel.org>2019-06-03 11:55:42 +0200
commite196e479a3b844da6e6e71e0d2a8694040cb4e52 (patch)
tree3d6c6505da33833db9e844774871356ed29055d7 /kernel/locking
parentd16dbd1b8a29bb9f8aca2c2f3bd1a0d2b7621126 (diff)
downloadlinux-e196e479a3b844da6e6e71e0d2a8694040cb4e52.tar.bz2
locking/lockdep: Use lockdep_init_task for task initiation consistently
Despite that there is a lockdep_init_task() which does nothing, lockdep initiates tasks by assigning lockdep fields and does so inconsistently. Fix this by using lockdep_init_task(). Signed-off-by: Yuyang Du <duyuyang@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bvanassche@acm.org Cc: frederic@kernel.org Cc: ming.lei@redhat.com Cc: will.deacon@arm.com Link: https://lkml.kernel.org/r/20190506081939.74287-8-duyuyang@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking')
-rw-r--r--kernel/locking/lockdep.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index bc1efc12a8c5..b7d9c28ecf3b 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -359,6 +359,13 @@ static inline u64 iterate_chain_key(u64 key, u32 idx)
return k0 | (u64)k1 << 32;
}
+void lockdep_init_task(struct task_struct *task)
+{
+ task->lockdep_depth = 0; /* no locks held yet */
+ task->curr_chain_key = 0;
+ task->lockdep_recursion = 0;
+}
+
void lockdep_off(void)
{
current->lockdep_recursion++;
@@ -4589,9 +4596,7 @@ void lockdep_reset(void)
int i;
raw_local_irq_save(flags);
- current->curr_chain_key = 0;
- current->lockdep_depth = 0;
- current->lockdep_recursion = 0;
+ lockdep_init_task(current);
memset(current->held_locks, 0, MAX_LOCK_DEPTH*sizeof(struct held_lock));
nr_hardirq_chains = 0;
nr_softirq_chains = 0;