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Donenfeld" To: linux-kernel@vger.kernel.org Cc: "Jason A. Donenfeld" , Arnd Bergmann , Thomas Gleixner Subject: [PATCH v4 3/4] timekeeping: add missing _ns functions for coarse accessors Date: Fri, 21 Jun 2019 17:37:40 +0200 Message-Id: <20190621153741.20159-3-Jason@zx2c4.com> In-Reply-To: <20190621153741.20159-1-Jason@zx2c4.com> References: <20190621153741.20159-1-Jason@zx2c4.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Arnd Bergmann Cc: Thomas Gleixner --- Documentation/core-api/timekeeping.rst | 10 +++++++--- include/linux/timekeeping.h | 27 ++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 3 deletions(-) -- 2.21.0 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 */