1 files changed, 0 insertions, 90 deletions
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
deleted file mode 100644
index 812dbf00844..00000000000
--- a/lib/kernel_lock.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * lib/kernel_lock.c
- *
- * This is the traditional BKL - big kernel lock. Largely
- * relegated to obsolescence, but used by various less
- * important (or lazy) subsystems.
- */
-#include <linux/smp_lock.h>
-#include <linux/module.h>
-#include <linux/kallsyms.h>
-
-/*
- * The 'big kernel semaphore'
- *
- * This mutex is taken and released recursively by lock_kernel()
- * and unlock_kernel().  It is transparently dropped and reacquired
- * over schedule().  It is used to protect legacy code that hasn't
- * been migrated to a proper locking design yet.
- *
- * Note: code locked by this semaphore will only be serialized against
- * other code using the same locking facility. The code guarantees that
- * the task remains on the same CPU.
- *
- * Don't use in new code.
- */
-static DECLARE_MUTEX(kernel_sem);
-
-/*
- * Re-acquire the kernel semaphore.
- *
- * This function is called with preemption off.
- *
- * We are executing in schedule() so the code must be extremely careful
- * about recursion, both due to the down() and due to the enabling of
- * preemption. schedule() will re-check the preemption flag after
- * reacquiring the semaphore.
- */
-int __lockfunc __reacquire_kernel_lock(void)
-{
-	struct task_struct *task = current;
-	int saved_lock_depth = task->lock_depth;
-
-	BUG_ON(saved_lock_depth < 0);
-
-	task->lock_depth = -1;
-	preempt_enable_no_resched();
-
-	down(&kernel_sem);
-
-	preempt_disable();
-	task->lock_depth = saved_lock_depth;
-
-	return 0;
-}
-
-void __lockfunc __release_kernel_lock(void)
-{
-	up(&kernel_sem);
-}
-
-/*
- * Getting the big kernel semaphore.
- */
-void __lockfunc lock_kernel(void)
-{
-	struct task_struct *task = current;
-	int depth = task->lock_depth + 1;
-
-	if (likely(!depth))
-		/*
-		 * No recursion worries - we set up lock_depth _after_
-		 */
-		down(&kernel_sem);
-
-	task->lock_depth = depth;
-}
-
-void __lockfunc unlock_kernel(void)
-{
-	struct task_struct *task = current;
-
-	BUG_ON(task->lock_depth < 0);
-
-	if (likely(--task->lock_depth < 0))
-		up(&kernel_sem);
-}
-
-EXPORT_SYMBOL(lock_kernel);
-EXPORT_SYMBOL(unlock_kernel);
-