diff options
Diffstat (limited to 'kernel/locking/lockdep.c')
| -rw-r--r-- | kernel/locking/lockdep.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index e97d08001437..bf1c00c881e4 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -6506,6 +6506,7 @@ asmlinkage __visible void lockdep_sys_exit(void) void lockdep_rcu_suspicious(const char *file, const int line, const char *s) { struct task_struct *curr = current; + int dl = READ_ONCE(debug_locks); /* Note: the following can be executed concurrently, so be careful. */ pr_warn("\n"); @@ -6515,11 +6516,12 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s) pr_warn("-----------------------------\n"); pr_warn("%s:%d %s!\n", file, line, s); pr_warn("\nother info that might help us debug this:\n\n"); - pr_warn("\n%srcu_scheduler_active = %d, debug_locks = %d\n", + pr_warn("\n%srcu_scheduler_active = %d, debug_locks = %d\n%s", !rcu_lockdep_current_cpu_online() ? "RCU used illegally from offline CPU!\n" : "", - rcu_scheduler_active, debug_locks); + rcu_scheduler_active, dl, + dl ? "" : "Possible false positive due to lockdep disabling via debug_locks = 0\n"); /* * If a CPU is in the RCU-free window in idle (ie: in the section |