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authorAndrei Vagin <avagin@gmail.com>2019-11-12 04:26:58 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-01-14 14:20:51 +0300
commit9c71a2e8a757bc6aee256bc97c6fb711144b0a0f (patch)
treea0a11da36b1c82409506d496dc7b779b9d8bce27 /kernel/time/posix-timers.h
parent2f58bf909abf9670fa4e848b433dc12ba4c2a44e (diff)
downloadlinux-9c71a2e8a757bc6aee256bc97c6fb711144b0a0f.tar.xz
posix-clocks: Introduce clock_get_ktime() callback
The callsite in common_timer_get() has already a comment: /* * The timespec64 based conversion is suboptimal, but it's not * worth to implement yet another callback. */ kc->clock_get(timr->it_clock, &ts64); now = timespec64_to_ktime(ts64); The upcoming support for time namespaces requires to have access to: - The time in a task's time namespace for sys_clock_gettime() - The time in the root name space for common_timer_get() That adds a valid reason to finally implement a separate callback which returns the time in ktime_t format. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-10-dima@arista.com
Diffstat (limited to 'kernel/time/posix-timers.h')
-rw-r--r--kernel/time/posix-timers.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h
index 070611b2c253..f32a2ebba9b8 100644
--- a/kernel/time/posix-timers.h
+++ b/kernel/time/posix-timers.h
@@ -6,8 +6,11 @@ struct k_clock {
struct timespec64 *tp);
int (*clock_set)(const clockid_t which_clock,
const struct timespec64 *tp);
+ /* Returns the clock value in the current time namespace. */
int (*clock_get_timespec)(const clockid_t which_clock,
struct timespec64 *tp);
+ /* Returns the clock value in the root time namespace. */
+ ktime_t (*clock_get_ktime)(const clockid_t which_clock);
int (*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
int (*timer_create)(struct k_itimer *timer);
int (*nsleep)(const clockid_t which_clock, int flags,