sched: remove the !PREEMPT_BKL code

remove the !PREEMPT_BKL code.

this removes 160 lines of legacy code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 3 insertions, 20 deletions

diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
index 4420ef427f83..0669b70fa6a3 100644
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -52,10 +52,6 @@ config PREEMPT
 
 endchoice
 
-config PREEMPT_BKL
-        def_bool y
-        depends on SMP || PREEMPT
-
 config RCU_TRACE
         bool "Enable tracing for RCU - currently stats in debugfs"
         select DEBUG_FS
diff --git a/kernel/sched.c b/kernel/sched.c
index 22712b2e058a..629614ad0358 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3955,10 +3955,9 @@ EXPORT_SYMBOL(schedule);
 asmlinkage void __sched preempt_schedule(void)
 {
         struct thread_info *ti = current_thread_info();
-#ifdef CONFIG_PREEMPT_BKL
         struct task_struct *task = current;
         int saved_lock_depth;
-#endif
+
         /*
          * If there is a non-zero preempt_count or interrupts are disabled,
          * we do not want to preempt the current task. Just return..
@@ -3974,14 +3973,10 @@ asmlinkage void __sched preempt_schedule(void)
                  * clear ->lock_depth so that schedule() doesnt
                  * auto-release the semaphore:
                  */
-#ifdef CONFIG_PREEMPT_BKL
                 saved_lock_depth = task->lock_depth;
                 task->lock_depth = -1;
-#endif
                 schedule();
-#ifdef CONFIG_PREEMPT_BKL
                 task->lock_depth = saved_lock_depth;
-#endif
                 sub_preempt_count(PREEMPT_ACTIVE);
 
                 /*
@@ -4002,10 +3997,9 @@ EXPORT_SYMBOL(preempt_schedule);
 asmlinkage void __sched preempt_schedule_irq(void)
 {
         struct thread_info *ti = current_thread_info();
-#ifdef CONFIG_PREEMPT_BKL
         struct task_struct *task = current;
         int saved_lock_depth;
-#endif
+
         /* Catch callers which need to be fixed */
         BUG_ON(ti->preempt_count || !irqs_disabled());
 
@@ -4017,16 +4011,12 @@ asmlinkage void __sched preempt_schedule_irq(void)
                  * clear ->lock_depth so that schedule() doesnt
                  * auto-release the semaphore:
                  */
-#ifdef CONFIG_PREEMPT_BKL
                 saved_lock_depth = task->lock_depth;
                 task->lock_depth = -1;
-#endif
                 local_irq_enable();
                 schedule();
                 local_irq_disable();
-#ifdef CONFIG_PREEMPT_BKL
                 task->lock_depth = saved_lock_depth;
-#endif
                 sub_preempt_count(PREEMPT_ACTIVE);
 
                 /*
@@ -5241,11 +5231,8 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
         spin_unlock_irqrestore(&rq->lock, flags);
 
         /* Set the preempt count _outside_ the spinlocks! */
-#if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_BKL)
-        task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0);
-#else
         task_thread_info(idle)->preempt_count = 0;
-#endif
+
         /*
          * The idle tasks have their own, simple scheduling class:
          */