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author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-01-31 07:45:13 -0800 |
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committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-04-19 09:27:29 -0700 |
commit | a5dd63efda3d07b50c0feda6fb4796bece237e61 (patch) | |
tree | 367cb2be5f9694d6d9eab4cf4394c67f96b225ea /kernel/locking/lockdep.c | |
parent | 5f0d5a3ae7cff0d7fa943c199c3a2e44f23e1fac (diff) | |
download | op-kernel-dev-a5dd63efda3d07b50c0feda6fb4796bece237e61.zip op-kernel-dev-a5dd63efda3d07b50c0feda6fb4796bece237e61.tar.gz |
lockdep: Use "WARNING" tag on lockdep splats
This commit changes lockdep splats to begin lines with "WARNING" and
to use pr_warn() instead of printk(). This change eases scripted
analysis of kernel console output.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/locking/lockdep.c')
-rw-r--r-- | kernel/locking/lockdep.c | 86 |
1 files changed, 43 insertions, 43 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index a95e5d1..e9d4f85 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1144,10 +1144,10 @@ print_circular_bug_header(struct lock_list *entry, unsigned int depth, return 0; printk("\n"); - printk("======================================================\n"); - printk("[ INFO: possible circular locking dependency detected ]\n"); + pr_warn("======================================================\n"); + pr_warn("WARNING: possible circular locking dependency detected\n"); print_kernel_ident(); - printk("-------------------------------------------------------\n"); + pr_warn("------------------------------------------------------\n"); printk("%s/%d is trying to acquire lock:\n", curr->comm, task_pid_nr(curr)); print_lock(check_src); @@ -1482,11 +1482,11 @@ print_bad_irq_dependency(struct task_struct *curr, return 0; printk("\n"); - printk("======================================================\n"); - printk("[ INFO: %s-safe -> %s-unsafe lock order detected ]\n", + pr_warn("=====================================================\n"); + pr_warn("WARNING: %s-safe -> %s-unsafe lock order detected\n", irqclass, irqclass); print_kernel_ident(); - printk("------------------------------------------------------\n"); + pr_warn("-----------------------------------------------------\n"); printk("%s/%d [HC%u[%lu]:SC%u[%lu]:HE%u:SE%u] is trying to acquire:\n", curr->comm, task_pid_nr(curr), curr->hardirq_context, hardirq_count() >> HARDIRQ_SHIFT, @@ -1711,10 +1711,10 @@ print_deadlock_bug(struct task_struct *curr, struct held_lock *prev, return 0; printk("\n"); - printk("=============================================\n"); - printk("[ INFO: possible recursive locking detected ]\n"); + pr_warn("============================================\n"); + pr_warn("WARNING: possible recursive locking detected\n"); print_kernel_ident(); - printk("---------------------------------------------\n"); + pr_warn("--------------------------------------------\n"); printk("%s/%d is trying to acquire lock:\n", curr->comm, task_pid_nr(curr)); print_lock(next); @@ -2061,10 +2061,10 @@ static void print_collision(struct task_struct *curr, struct lock_chain *chain) { printk("\n"); - printk("======================\n"); - printk("[chain_key collision ]\n"); + pr_warn("============================\n"); + pr_warn("WARNING: chain_key collision\n"); print_kernel_ident(); - printk("----------------------\n"); + pr_warn("----------------------------\n"); printk("%s/%d: ", current->comm, task_pid_nr(current)); printk("Hash chain already cached but the contents don't match!\n"); @@ -2360,10 +2360,10 @@ print_usage_bug(struct task_struct *curr, struct held_lock *this, return 0; printk("\n"); - printk("=================================\n"); - printk("[ INFO: inconsistent lock state ]\n"); + pr_warn("================================\n"); + pr_warn("WARNING: inconsistent lock state\n"); print_kernel_ident(); - printk("---------------------------------\n"); + pr_warn("--------------------------------\n"); printk("inconsistent {%s} -> {%s} usage.\n", usage_str[prev_bit], usage_str[new_bit]); @@ -2425,10 +2425,10 @@ print_irq_inversion_bug(struct task_struct *curr, return 0; printk("\n"); - printk("=========================================================\n"); - printk("[ INFO: possible irq lock inversion dependency detected ]\n"); + pr_warn("========================================================\n"); + pr_warn("WARNING: possible irq lock inversion dependency detected\n"); print_kernel_ident(); - printk("---------------------------------------------------------\n"); + pr_warn("--------------------------------------------------------\n"); printk("%s/%d just changed the state of lock:\n", curr->comm, task_pid_nr(curr)); print_lock(this); @@ -3170,10 +3170,10 @@ print_lock_nested_lock_not_held(struct task_struct *curr, return 0; printk("\n"); - printk("==================================\n"); - printk("[ BUG: Nested lock was not taken ]\n"); + pr_warn("==================================\n"); + pr_warn("WARNING: Nested lock was not taken\n"); print_kernel_ident(); - printk("----------------------------------\n"); + pr_warn("----------------------------------\n"); printk("%s/%d is trying to lock:\n", curr->comm, task_pid_nr(curr)); print_lock(hlock); @@ -3383,10 +3383,10 @@ print_unlock_imbalance_bug(struct task_struct *curr, struct lockdep_map *lock, return 0; printk("\n"); - printk("=====================================\n"); - printk("[ BUG: bad unlock balance detected! ]\n"); + pr_warn("=====================================\n"); + pr_warn("WARNING: bad unlock balance detected!\n"); print_kernel_ident(); - printk("-------------------------------------\n"); + pr_warn("-------------------------------------\n"); printk("%s/%d is trying to release lock (", curr->comm, task_pid_nr(curr)); print_lockdep_cache(lock); @@ -3880,10 +3880,10 @@ print_lock_contention_bug(struct task_struct *curr, struct lockdep_map *lock, return 0; printk("\n"); - printk("=================================\n"); - printk("[ BUG: bad contention detected! ]\n"); + pr_warn("=================================\n"); + pr_warn("WARNING: bad contention detected!\n"); print_kernel_ident(); - printk("---------------------------------\n"); + pr_warn("---------------------------------\n"); printk("%s/%d is trying to contend lock (", curr->comm, task_pid_nr(curr)); print_lockdep_cache(lock); @@ -4244,10 +4244,10 @@ print_freed_lock_bug(struct task_struct *curr, const void *mem_from, return; printk("\n"); - printk("=========================\n"); - printk("[ BUG: held lock freed! ]\n"); + pr_warn("=========================\n"); + pr_warn("WARNING: held lock freed!\n"); print_kernel_ident(); - printk("-------------------------\n"); + pr_warn("-------------------------\n"); printk("%s/%d is freeing memory %p-%p, with a lock still held there!\n", curr->comm, task_pid_nr(curr), mem_from, mem_to-1); print_lock(hlock); @@ -4302,11 +4302,11 @@ static void print_held_locks_bug(void) return; printk("\n"); - printk("=====================================\n"); - printk("[ BUG: %s/%d still has locks held! ]\n", + pr_warn("====================================\n"); + pr_warn("WARNING: %s/%d still has locks held!\n", current->comm, task_pid_nr(current)); print_kernel_ident(); - printk("-------------------------------------\n"); + pr_warn("------------------------------------\n"); lockdep_print_held_locks(current); printk("\nstack backtrace:\n"); dump_stack(); @@ -4371,7 +4371,7 @@ retry: } while_each_thread(g, p); printk("\n"); - printk("=============================================\n\n"); + pr_warn("=============================================\n\n"); if (unlock) read_unlock(&tasklist_lock); @@ -4401,10 +4401,10 @@ asmlinkage __visible void lockdep_sys_exit(void) if (!debug_locks_off()) return; printk("\n"); - printk("================================================\n"); - printk("[ BUG: lock held when returning to user space! ]\n"); + pr_warn("================================================\n"); + pr_warn("WARNING: lock held when returning to user space!\n"); print_kernel_ident(); - printk("------------------------------------------------\n"); + pr_warn("------------------------------------------------\n"); printk("%s/%d is leaving the kernel with locks still held!\n", curr->comm, curr->pid); lockdep_print_held_locks(curr); @@ -4421,13 +4421,13 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s) #endif /* #ifdef CONFIG_PROVE_RCU_REPEATEDLY */ /* Note: the following can be executed concurrently, so be careful. */ printk("\n"); - pr_err("===============================\n"); - pr_err("[ ERR: suspicious RCU usage. ]\n"); + pr_warn("=============================\n"); + pr_warn("WARNING: suspicious RCU usage\n"); print_kernel_ident(); - pr_err("-------------------------------\n"); - pr_err("%s:%d %s!\n", file, line, s); - pr_err("\nother info that might help us debug this:\n\n"); - pr_err("\n%srcu_scheduler_active = %d, debug_locks = %d\n", + pr_warn("-----------------------------\n"); + printk("%s:%d %s!\n", file, line, s); + printk("\nother info that might help us debug this:\n\n"); + printk("\n%srcu_scheduler_active = %d, debug_locks = %d\n", !rcu_lockdep_current_cpu_online() ? "RCU used illegally from offline CPU!\n" : !rcu_is_watching() |