3 files changed, 15 insertions, 4 deletions

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 3b65746c7f15..e07fb093f819 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -401,7 +401,10 @@ static __always_inline u64 __ktime_get_fast_ns(struct tk_fast *tkf)
         do {
                 seq = raw_read_seqcount_latch(&tkf->seq);
                 tkr = tkf->base + (seq & 0x01);
-                now = ktime_to_ns(tkr->base) + timekeeping_get_ns(tkr);
+                now = ktime_to_ns(tkr->base);
+
+                now += clocksource_delta(tkr->read(tkr->clock),
+                                         tkr->cycle_last, tkr->mask);
         } while (read_seqcount_retry(&tkf->seq, seq));
 
         return now;
diff --git a/kernel/time/timekeeping_debug.c b/kernel/time/timekeeping_debug.c
index f6bd65236712..107310a6f36f 100644
--- a/kernel/time/timekeeping_debug.c
+++ b/kernel/time/timekeeping_debug.c
@@ -23,7 +23,9 @@
 
 #include "timekeeping_internal.h"
 
-static unsigned int sleep_time_bin[32] = {0};
+#define NUM_BINS 32
+
+static unsigned int sleep_time_bin[NUM_BINS] = {0};
 
 static int tk_debug_show_sleep_time(struct seq_file *s, void *data)
 {
@@ -69,6 +71,9 @@ late_initcall(tk_debug_sleep_time_init);
 
 void tk_debug_account_sleep_time(struct timespec64 *t)
 {
-        sleep_time_bin[fls(t->tv_sec)]++;
+        /* Cap bin index so we don't overflow the array */
+        int bin = min(fls(t->tv_sec), NUM_BINS-1);
+
+        sleep_time_bin[bin]++;
 }
 
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 555670a5143c..32bf6f75a8fe 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1496,6 +1496,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
         struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]);
         u64 expires = KTIME_MAX;
         unsigned long nextevt;
+        bool is_max_delta;
 
         /*
          * Pretend that there is no timer pending if the cpu is offline.
@@ -1506,6 +1507,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
 
         spin_lock(&base->lock);
         nextevt = __next_timer_interrupt(base);
+        is_max_delta = (nextevt == base->clk + NEXT_TIMER_MAX_DELTA);
         base->next_expiry = nextevt;
         /*
          * We have a fresh next event. Check whether we can forward the base:
@@ -1519,7 +1521,8 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
                 expires = basem;
                 base->is_idle = false;
         } else {
-                expires = basem + (nextevt - basej) * TICK_NSEC;
+                if (!is_max_delta)
+                        expires = basem + (nextevt - basej) * TICK_NSEC;
                 /*
                  * If we expect to sleep more than a tick, mark the base idle:
                  */