timekeeping: Remove timekeeper.total_sleep_time

No more users. Remove it

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

2 files changed, 5 insertions, 15 deletions

diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index 87e0992564f2..8e5d77a01787 100644
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -20,8 +20,8 @@
  * the tv_nsec part positive so we can use the usual normalization.
  *
  * wall_to_monotonic is moved after resume from suspend for the
- * monotonic time not to jump. We need to add total_sleep_time to
- * wall_to_monotonic to get the real boot based time offset.
+ * monotonic time not to jump. To calculate the real boot time offset
+ * we need to do offs_real - offs_boot.
  *
  * - wall_to_monotonic is no longer the boot time, getboottime must be
  * used instead.
@@ -51,8 +51,6 @@ struct timekeeper {
         /* Offset clock monotonic -> clock tai */
         ktime_t                 offs_tai;
 
-        /* time spent in suspend */
-        struct timespec64       total_sleep_time;
         /* The current UTC to TAI offset in seconds */
         s32                     tai_offset;
 
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 3edc0c1d6fe8..50d5de05b837 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -97,13 +97,9 @@ static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec64 wtm)
         tk->offs_tai = ktime_add(tk->offs_real, ktime_set(tk->tai_offset, 0));
 }
 
-static void tk_set_sleep_time(struct timekeeper *tk, struct timespec64 t)
+static inline void tk_update_sleep_time(struct timekeeper *tk, ktime_t delta)
 {
-        /* Verify consistency before modifying */
-        WARN_ON_ONCE(tk->offs_boot.tv64 != timespec64_to_ktime(tk->total_sleep_time).tv64);
-
-        tk->total_sleep_time    = t;
-        tk->offs_boot           = timespec64_to_ktime(t);
+        tk->offs_boot = ktime_add(tk->offs_boot, delta);
 }
 
 /**
@@ -919,10 +915,6 @@ void __init timekeeping_init(void)
         set_normalized_timespec64(&tmp, -boot.tv_sec, -boot.tv_nsec);
         tk_set_wall_to_mono(tk, tmp);
 
-        tmp.tv_sec = 0;
-        tmp.tv_nsec = 0;
-        tk_set_sleep_time(tk, tmp);
-
         timekeeping_update(tk, TK_MIRROR);
 
         write_seqcount_end(&tk_core.seq);
@@ -950,7 +942,7 @@ static void __timekeeping_inject_sleeptime(struct timekeeper *tk,
         }
         tk_xtime_add(tk, delta);
         tk_set_wall_to_mono(tk, timespec64_sub(tk->wall_to_monotonic, *delta));
-        tk_set_sleep_time(tk, timespec64_add(tk->total_sleep_time, *delta));
+        tk_update_sleep_time(tk, timespec64_to_ktime(*delta));
         tk_debug_account_sleep_time(delta);
 }