[PATCH v4 3/4] timekeeping: add missing _ns functions for coarse accessors

[Jason A. Donenfeld]

This further unifies the accessors for the fast and coarse functions, so
that the same types of functions are available for each. There was also
a bit of confusion with the documentation, which prior advertised a
function that has never existed. Finally, the vanilla ktime_get_coarse()
was omitted from the API originally, so this fills this oversight.

Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 Documentation/core-api/timekeeping.rst | 10 +++++++---
 include/linux/timekeeping.h            | 27 ++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/Documentation/core-api/timekeeping.rst b/Documentation/core-api/timekeeping.rst
index 47b41e948459..0d4019fcaa87 100644
--- a/Documentation/core-api/timekeeping.rst
+++ b/Documentation/core-api/timekeeping.rst
@@ -99,16 +99,20 @@ Coarse and fast access
 
 Some additional variants exist for more specialized cases:
 
-.. c:function:: ktime_t ktime_get_coarse_boottime( void )
+.. c:function:: ktime_t ktime_get_coarse( void )
+		ktime_t ktime_get_coarse_boottime( void )
 		ktime_t ktime_get_coarse_real( void )
 		ktime_t ktime_get_coarse_clocktai( void )
-		ktime_t ktime_get_coarse_raw( void )
+
+.. c:function:: u64 ktime_get_coarse_ns( void )
+		u64 ktime_get_boot_coarse_ns( void )
+		u64 ktime_get_real_coarse_ns( void )
+		u64 ktime_get_tai_coarse_ns( void )
 
 .. c:function:: void ktime_get_coarse_ts64( struct timespec64 * )
 		void ktime_get_coarse_boottime_ts64( struct timespec64 * )
 		void ktime_get_coarse_real_ts64( struct timespec64 * )
 		void ktime_get_coarse_clocktai_ts64( struct timespec64 * )
-		void ktime_get_coarse_raw_ts64( struct timespec64 * )
 
 	These are quicker than the non-coarse versions, but less accurate,
 	corresponding to CLOCK_MONONOTNIC_COARSE and CLOCK_REALTIME_COARSE
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index c5d360779fab..3df8e63c704b 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -113,6 +113,33 @@ static inline ktime_t ktime_get_coarse_clocktai(void)
 	return ktime_get_coarse_with_offset(TK_OFFS_TAI);
 }
 
+static inline ktime_t ktime_get_coarse(void)
+{
+	struct timespec64 ts;
+	ktime_get_coarse_ts64(&ts);
+	return timespec64_to_ktime(ts);
+}
+
+static inline u64 ktime_get_coarse_ns(void)
+{
+	return ktime_to_ns(ktime_get_coarse());
+}
+
+static inline u64 ktime_get_real_coarse_ns(void)
+{
+	return ktime_to_ns(ktime_get_coarse_real());
+}
+
+static inline u64 ktime_get_boot_coarse_ns(void)
+{
+	return ktime_to_ns(ktime_get_coarse_boottime());
+}
+
+static inline u64 ktime_get_tai_coarse_ns(void)
+{
+	return ktime_to_ns(ktime_get_coarse_clocktai());
+}
+
 /**
  * ktime_mono_to_real - Convert monotonic time to clock realtime
  */
-- 
2.21.0