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timekeeping: Add missing _ns functions for coarse accessors

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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@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190621203249.3909-3-Jason@zx2c4.com
This commit is contained in:
Jason A. Donenfeld 2019-06-21 22:32:49 +02:00 • committed by Thomas Gleixner
parent 9285ec4c8b
commit 4c54294d01
2 changed files with 35 additions and 3 deletions
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10
Documentation/core-api/timekeeping.rst
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@ -99,16 +99,20 @@ Coarse and fast_ns 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_coarse_boot_ns( void )
u64 ktime_get_coarse_real_ns( void )
u64 ktime_get_coarse_clocktai_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