1 files changed, 9 insertions, 0 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index 2d607f4d1797..ee79f14db358 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -87,6 +87,12 @@ static DEFINE_SEMAPHORE(console_sem);
 struct console *console_drivers;
 EXPORT_SYMBOL_GPL(console_drivers);
 
+#ifdef CONFIG_LOCKDEP
+static struct lockdep_map console_lock_dep_map = {
+        .name = "console_lock"
+};
+#endif
+
 /*
  * This is used for debugging the mess that is the VT code by
  * keeping track if we have the console semaphore held. It's
@@ -1914,6 +1920,7 @@ void console_lock(void)
                 return;
         console_locked = 1;
         console_may_schedule = 1;
+        mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_);
 }
 EXPORT_SYMBOL(console_lock);
 
@@ -1935,6 +1942,7 @@ int console_trylock(void)
         }
         console_locked = 1;
         console_may_schedule = 0;
+        mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_);
         return 1;
 }
 EXPORT_SYMBOL(console_trylock);
@@ -2095,6 +2103,7 @@ skip:
                 local_irq_restore(flags);
         }
         console_locked = 0;
+        mutex_release(&console_lock_dep_map, 1, _RET_IP_);
 
         /* Release the exclusive_console once it is used */
         if (unlikely(exclusive_console))