Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / arch / x86 / kernel / process_64.c
index 61270e8..2b154da 100644 (file)
@@ -14,7 +14,6 @@
  * This file handles the architecture-dependent parts of process handling..
  */
 
-#include <linux/stackprotector.h>
 #include <linux/cpu.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/notifier.h>
 #include <linux/kprobes.h>
 #include <linux/kdebug.h>
-#include <linux/tick.h>
 #include <linux/prctl.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
 #include <linux/ftrace.h>
-#include <linux/cpuidle.h>
 
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/idle.h>
 #include <asm/syscalls.h>
 #include <asm/debugreg.h>
-#include <asm/nmi.h>
 #include <asm/switch_to.h>
 
 asmlinkage extern void ret_from_fork(void);
 
 DEFINE_PER_CPU(unsigned long, old_rsp);
-static DEFINE_PER_CPU(unsigned char, is_idle);
-
-static ATOMIC_NOTIFIER_HEAD(idle_notifier);
-
-void idle_notifier_register(struct notifier_block *n)
-{
-       atomic_notifier_chain_register(&idle_notifier, n);
-}
-EXPORT_SYMBOL_GPL(idle_notifier_register);
-
-void idle_notifier_unregister(struct notifier_block *n)
-{
-       atomic_notifier_chain_unregister(&idle_notifier, n);
-}
-EXPORT_SYMBOL_GPL(idle_notifier_unregister);
-
-void enter_idle(void)
-{
-       percpu_write(is_idle, 1);
-       atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
-}
-
-static void __exit_idle(void)
-{
-       if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
-               return;
-       atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
-}
-
-/* Called from interrupts to signify idle end */
-void exit_idle(void)
-{
-       /* idle loop has pid 0 */
-       if (current->pid)
-               return;
-       __exit_idle();
-}
-
-#ifndef CONFIG_SMP
-static inline void play_dead(void)
-{
-       BUG();
-}
-#endif
-
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle(void)
-{
-       current_thread_info()->status |= TS_POLLING;
-
-       /*
-        * If we're the non-boot CPU, nothing set the stack canary up
-        * for us.  CPU0 already has it initialized but no harm in
-        * doing it again.  This is a good place for updating it, as
-        * we wont ever return from this function (so the invalid
-        * canaries already on the stack wont ever trigger).
-        */
-       boot_init_stack_canary();
-
-       /* endless idle loop with no priority at all */
-       while (1) {
-               tick_nohz_idle_enter();
-               while (!need_resched()) {
-
-                       rmb();
-
-                       if (cpu_is_offline(smp_processor_id()))
-                               play_dead();
-                       /*
-                        * Idle routines should keep interrupts disabled
-                        * from here on, until they go to idle.
-                        * Otherwise, idle callbacks can misfire.
-                        */
-                       local_touch_nmi();
-                       local_irq_disable();
-                       enter_idle();
-                       /* Don't trace irqs off for idle */
-                       stop_critical_timings();
-
-                       /* enter_idle() needs rcu for notifiers */
-                       rcu_idle_enter();
-
-                       if (cpuidle_idle_call())
-                               pm_idle();
-
-                       rcu_idle_exit();
-                       start_critical_timings();
-
-                       /* In many cases the interrupt that ended idle
-                          has already called exit_idle. But some idle
-                          loops can be woken up without interrupt. */
-                       __exit_idle();
-               }
-
-               tick_nohz_idle_exit();
-               schedule_preempt_disabled();
-       }
-}
 
 /* Prints also some state that isn't saved in the pt_regs */
 void __show_regs(struct pt_regs *regs, int all)