1 files changed, 14 insertions, 5 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index cca93cc0dd7d..1fd67e16cd31 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -57,6 +57,16 @@
 #include <asm/unistd.h>
 
 /*
+ * Scheduler clock - returns current time in nanosec units.
+ * This is default implementation.
+ * Architectures and sub-architectures can override this.
+ */
+unsigned long long __attribute__((weak)) sched_clock(void)
+{
+        return (unsigned long long)jiffies * (1000000000 / HZ);
+}
+
+/*
  * Convert user-nice values [ -20 ... 0 ... 19 ]
  * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
  * and back.
@@ -4193,13 +4203,12 @@ static void __setscheduler(struct task_struct *p, int policy, int prio)
 }
 
 /**
- * sched_setscheduler - change the scheduling policy and/or RT priority of
- * a thread.
+ * sched_setscheduler - change the scheduling policy and/or RT priority of a thread.
  * @p: the task in question.
  * @policy: new policy.
  * @param: structure containing the new RT priority.
  *
- * NOTE: the task may be already dead
+ * NOTE that the task may be already dead.
  */
 int sched_setscheduler(struct task_struct *p, int policy,
                        struct sched_param *param)
@@ -4567,7 +4576,7 @@ asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len,
 /**
  * sys_sched_yield - yield the current processor to other threads.
  *
- * this function yields the current CPU by moving the calling thread
+ * This function yields the current CPU by moving the calling thread
  * to the expired array. If there are no other threads running on this
  * CPU then this function will return.
  */
@@ -4694,7 +4703,7 @@ EXPORT_SYMBOL(cond_resched_softirq);
 /**
  * yield - yield the current processor to other threads.
  *
- * this is a shortcut for kernel-space yielding - it marks the
+ * This is a shortcut for kernel-space yielding - it marks the
  * thread runnable and calls sys_sched_yield().
  */
 void __sched yield(void)