lockdep: Print out additional debugging advice when we hit lockdep BUGs

[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / kernel / lockdep.c

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index e5deddadeab1d0d9e8dd44d35627e7193e9c3fa6..c5d1e6bbdb3e2192e0f25c0bfb0a4363168ece7f 100644 (file)
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -411,6 +411,7 @@ static int save_trace(struct stack_trace *trace)
 
                printk("BUG: MAX_STACK_TRACE_ENTRIES too low!\n");
                printk("turning off the locking correctness validator.\n");
+               printk("Attach output of /proc/lock_stat to bug report\n");
                dump_stack();
 
                return 0;
@@ -765,6 +766,7 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force)
 
                printk("BUG: MAX_LOCKDEP_KEYS too low!\n");
                printk("turning off the locking correctness validator.\n");
+               printk("Attach output of /proc/lock_stat to bug report\n");
                dump_stack();
                return NULL;
        }
@@ -836,6 +838,7 @@ static struct lock_list *alloc_list_entry(void)
 
                printk("BUG: MAX_LOCKDEP_ENTRIES too low!\n");
                printk("turning off the locking correctness validator.\n");
+               printk("Attach output of /proc/lock_stat to bug report\n");
                dump_stack();
                return NULL;
        }
@@ -2050,6 +2053,7 @@ cache_hit:
 
                printk("BUG: MAX_LOCKDEP_CHAINS too low!\n");
                printk("turning off the locking correctness validator.\n");
+               printk("Attach output of /proc/lock_stat to bug report\n");
                dump_stack();
                return 0;
        }
@@ -3191,6 +3195,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
                printk("BUG: MAX_LOCK_DEPTH too low, depth: %i  max: %lu!\n",
                       curr->lockdep_depth, MAX_LOCK_DEPTH);
                printk("turning off the locking correctness validator.\n");
+               printk("Attach output of /proc/lock_stat to bug report\n");
 
                lockdep_print_held_locks(current);
                debug_show_all_locks();