From: 黄涛 <huangtao@rock-chips.com>
Date: Sat, 30 Jul 2011 07:54:41 +0000 (+0800)
Subject: Revert "timer: Added usleep_range timer"
X-Git-Tag: firefly_0821_release~10040
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3f2bbceb464219b187fbb1e954c046157e223cd6;p=firefly-linux-kernel-4.4.55.git

Revert "timer: Added usleep_range timer"

This reverts commit 18464b0b7575266595c3a1b8e0aab9198033b85e.
---

diff --git a/include/linux/delay.h b/include/linux/delay.h
index a6ecb34cf547..fd832c6d419e 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -45,7 +45,6 @@ extern unsigned long lpj_fine;
 void calibrate_delay(void);
 void msleep(unsigned int msecs);
 unsigned long msleep_interruptible(unsigned int msecs);
-void usleep_range(unsigned long min, unsigned long max);
 
 static inline void ssleep(unsigned int seconds)
 {
diff --git a/kernel/timer.c b/kernel/timer.c
index 0015407e18b1..cb3c1f19a2f6 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1690,25 +1690,3 @@ unsigned long msleep_interruptible(unsigned int msecs)
 }
 
 EXPORT_SYMBOL(msleep_interruptible);
-
-static int __sched do_usleep_range(unsigned long min, unsigned long max)
-{
-	ktime_t kmin;
-	unsigned long delta;
-
-	kmin = ktime_set(0, min * NSEC_PER_USEC);
-	delta = (max - min) * NSEC_PER_USEC;
-	return schedule_hrtimeout_range(&kmin, delta, HRTIMER_MODE_REL);
-}
-
-/**
- * usleep_range - Drop in replacement for udelay where wakeup is flexible
- * @min: Minimum time in usecs to sleep
- * @max: Maximum time in usecs to sleep
- */
-void usleep_range(unsigned long min, unsigned long max)
-{
-	__set_current_state(TASK_UNINTERRUPTIBLE);
-	do_usleep_range(min, max);
-}
-EXPORT_SYMBOL(usleep_range);