posix-timers: Unify MONOTONIC and BOOTTIME clock behavior

KAGA-KOKO · Ingo Molnar · commit 7250a4047aa6 · 2018-03-13T07:34:22.000+01:00
Now that the MONOTONIC and BOOTTIME clocks are indentical remove all the special casing. The user space visible interfaces still support both clocks, but their behavior is identical. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kevin Easton <kevin@guarana.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Salyzyn <salyzyn@android.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20180301165150.315745557@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
@@ -251,12 +251,6 @@ static int posix_get_coarse_res(const clockid_t which_clock, struct timespec64 *
 	return 0;
 }
 
-static int posix_get_boottime(const clockid_t which_clock, struct timespec64 *tp)
-{
-	get_monotonic_boottime64(tp);
-	return 0;
-}
-
 static int posix_get_tai(clockid_t which_clock, struct timespec64 *tp)
 {
 	timekeeping_clocktai64(tp);
@@ -1322,21 +1316,6 @@ static const struct k_clock clock_tai = {
 	.timer_arm		= common_hrtimer_arm,
 };
 
-static const struct k_clock clock_boottime = {
-	.clock_getres		= posix_get_hrtimer_res,
-	.clock_get		= posix_get_boottime,
-	.nsleep			= common_nsleep,
-	.timer_create		= common_timer_create,
-	.timer_set		= common_timer_set,
-	.timer_get		= common_timer_get,
-	.timer_del		= common_timer_del,
-	.timer_rearm		= common_hrtimer_rearm,
-	.timer_forward		= common_hrtimer_forward,
-	.timer_remaining	= common_hrtimer_remaining,
-	.timer_try_to_cancel	= common_hrtimer_try_to_cancel,
-	.timer_arm		= common_hrtimer_arm,
-};
-
 static const struct k_clock clock_monotonic_active = {
 	.clock_getres		= posix_get_hrtimer_res,
 	.clock_get		= posix_get_monotonic_active,
@@ -1350,7 +1329,7 @@ static const struct k_clock * const posix_clocks[] = {
 	[CLOCK_MONOTONIC_RAW]		= &clock_monotonic_raw,
 	[CLOCK_REALTIME_COARSE]		= &clock_realtime_coarse,
 	[CLOCK_MONOTONIC_COARSE]	= &clock_monotonic_coarse,
-	[CLOCK_BOOTTIME]		= &clock_boottime,
+	[CLOCK_BOOTTIME]		= &clock_monotonic,
 	[CLOCK_REALTIME_ALARM]		= &alarm_clock,
 	[CLOCK_BOOTTIME_ALARM]		= &alarm_clock,
 	[CLOCK_TAI]			= &clock_tai,
