[src/trunk]: src/sys/external/bsd/drm2/include/linux Rework Linux ktime.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e66f280c1641
branches:  trunk
changeset: 992674:e66f280c1641
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 07:27:27 2018 +0000

description:
Rework Linux ktime.

- Remove union crap which has been removed upstream.
- Define everything in terms of ns_to_ktime and ktime_to_ns.
- Add ktime_to_us.
- Add ktime_us_delta.

diffstat:

 sys/external/bsd/drm2/include/linux/ktime.h |  56 +++++++++++-----------------
 1 files changed, 23 insertions(+), 33 deletions(-)

diffs (116 lines):

diff -r a69086f3ce4c -r e66f280c1641 sys/external/bsd/drm2/include/linux/ktime.h
--- a/sys/external/bsd/drm2/include/linux/ktime.h       Mon Aug 27 07:27:16 2018 +0000
+++ b/sys/external/bsd/drm2/include/linux/ktime.h       Mon Aug 27 07:27:27 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ktime.h,v 1.5 2018/08/27 07:05:00 riastradh Exp $      */
+/*     $NetBSD: ktime.h,v 1.6 2018/08/27 07:27:27 riastradh Exp $      */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -40,39 +40,32 @@
 
 union ktime {
        int64_t kt_nsec;
-       struct {
-#if _BYTE_ORDER == _BIG_ENDIAN
-               int32_t ktsn_sec;
-               int32_t ktsn_nsec;
-#else
-               int32_t ktsn_nsec;
-               int32_t ktsn_sec;
-#endif
-       } kt_sec_nsec;
 };
 
 typedef union ktime ktime_t;
 
-static inline ktime_t
-ktime_add_ns(ktime_t kt, int64_t nsec)
-{
-       return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) };
-}
-
 static inline int64_t
 ktime_to_ns(ktime_t kt)
 {
        return kt.kt_nsec;
 }
 
+static inline int64_t
+ktime_to_us(ktime_t kt)
+{
+       return ktime_to_ns(kt)/1000;
+}
+
 static inline ktime_t
 ns_to_ktime(int64_t nsec)
 {
-       ktime_t kt;
+       return (ktime_t) { .kt_nsec = nsec };
+}
 
-       kt.kt_nsec = nsec;
-
-       return kt;
+static inline ktime_t
+ktime_add_ns(ktime_t kt, int64_t nsec)
+{
+       return ns_to_ktime(ktime_to_ns(kt) + nsec);
 }
 
 static inline ktime_t
@@ -102,37 +95,28 @@
 static inline ktime_t
 timespec_to_ktime(struct timespec ts)
 {
-       return ns_to_ktime(1000000000*ts.tv_sec + ts.tv_nsec);
+       /* XXX Silently truncate?  */
+       return ns_to_ktime(1000000000*(int64_t)ts.tv_sec + ts.tv_nsec);
 }
 
 static inline ktime_t
 ktime_get(void)
 {
        struct timespec ts;
-       ktime_t kt;
 
        nanouptime(&ts);
 
-       /* XXX Silently truncate?  */
-       kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
-       kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
-
-       return kt;
+       return timespec_to_ktime(ts);
 }
 
 static inline ktime_t
 ktime_get_real(void)
 {
        struct timespec ts;
-       ktime_t kt;
 
        nanotime(&ts);
 
-       /* XXX Silently truncate?  */
-       kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
-       kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
-
-       return kt;
+       return timespec_to_ktime(ts);
 }
 
 static inline uint64_t
@@ -159,6 +143,12 @@
        return timespec_to_ktime(ts);
 }
 
+static inline int64_t
+ktime_us_delta(ktime_t a, ktime_t b)
+{
+       return ktime_to_us(ktime_sub(a, b));
+}
+
 static inline bool
 time_in_range(unsigned long x, unsigned long a, unsigned long b)
 {