From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 16 Jul 2014 21:03:55 +0000 (+0000)
Subject: ktime: Sanitize ktime_to_us/ms conversion
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c06ecb5f940200504159bd3bd63c0a29c4780b83;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

ktime: Sanitize ktime_to_us/ms conversion

With the plain nanoseconds based ktime_t we can simply use
ktime_divns() instead of going through loops and hoops of
timespec/timeval conversion.

Change-Id: Ib33ea80bc3fdd26fcada1072b1f8ffc26081c0ba
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
---

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index d19a5c2d227..a3919d428fd 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -452,12 +452,6 @@ extern void hrtimer_run_pending(void);
 /* Bootup initialization: */
 extern void __init hrtimers_init(void);
 
-#if BITS_PER_LONG < 64
-extern u64 ktime_divns(const ktime_t kt, s64 div);
-#else /* BITS_PER_LONG < 64 */
-# define ktime_divns(kt, div)		(u64)((kt).tv64 / (div))
-#endif
-
 /* Show pending timers: */
 extern void sysrq_timer_list_show(void);
 
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index bbca12804d1..e18ab688f9c 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -301,16 +301,20 @@ static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
 	return 0;
 }
 
+#if BITS_PER_LONG < 64
+extern u64 ktime_divns(const ktime_t kt, s64 div);
+#else /* BITS_PER_LONG < 64 */
+# define ktime_divns(kt, div)		(u64)((kt).tv64 / (div))
+#endif
+
 static inline s64 ktime_to_us(const ktime_t kt)
 {
-	struct timeval tv = ktime_to_timeval(kt);
-	return (s64) tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
+	return ktime_divns(kt, NSEC_PER_USEC);
 }
 
 static inline s64 ktime_to_ms(const ktime_t kt)
 {
-	struct timeval tv = ktime_to_timeval(kt);
-	return (s64) tv.tv_sec * MSEC_PER_SEC + tv.tv_usec / USEC_PER_MSEC;
+	return ktime_divns(kt, NSEC_PER_MSEC);
 }
 
 static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 0b6513de91a..e1ef3f3b18f 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -349,6 +349,7 @@ u64 ktime_divns(const ktime_t kt, s64 div)
 
 	return dclc;
 }
+EXPORT_SYMBOL_GPL(ktime_divns);
 #endif /* BITS_PER_LONG >= 64 */
 
 /*