1 files changed, 11 insertions, 5 deletions

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 99947919e30b..c91b09770ebd 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -258,16 +258,22 @@ static __always_inline bool steal_account_process_tick(void)
 {
 #ifdef CONFIG_PARAVIRT
         if (static_key_false(&paravirt_steal_enabled)) {
-                u64 steal, st = 0;
+                u64 steal;
+                cputime_t steal_ct;
 
                 steal = paravirt_steal_clock(smp_processor_id());
                 steal -= this_rq()->prev_steal_time;
 
-                st = steal_ticks(steal);
-                this_rq()->prev_steal_time += st * TICK_NSEC;
+                /*
+                 * cputime_t may be less precise than nsecs (eg: if it's
+                 * based on jiffies). Lets cast the result to cputime
+                 * granularity and account the rest on the next rounds.
+                 */
+                steal_ct = nsecs_to_cputime(steal);
+                this_rq()->prev_steal_time += cputime_to_nsecs(steal_ct);
 
-                account_steal_time(st);
-                return st;
+                account_steal_time(steal_ct);
+                return steal_ct;
         }
 #endif
         return false;