1 files changed, 9 insertions, 7 deletions

diff --git a/kernel/acct.c b/kernel/acct.c
index 6312d6bd43e3..38d57fa6b78f 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -427,6 +427,7 @@ static void do_acct_process(long exitcode, struct file *file)
         u64 elapsed;
         u64 run_time;
         struct timespec uptime;
+        unsigned long jiffies;
 
         /*
          * First check to see if there is enough free_space to continue
@@ -467,12 +468,12 @@ static void do_acct_process(long exitcode, struct file *file)
 #endif
         do_div(elapsed, AHZ);
         ac.ac_btime = xtime.tv_sec - elapsed;
-        ac.ac_utime = encode_comp_t(jiffies_to_AHZ(
-                                            current->signal->utime +
-                                            current->group_leader->utime));
-        ac.ac_stime = encode_comp_t(jiffies_to_AHZ(
-                                            current->signal->stime +
-                                            current->group_leader->stime));
+        jiffies = cputime_to_jiffies(cputime_add(current->group_leader->utime,
+                                                 current->signal->utime));
+        ac.ac_utime = encode_comp_t(jiffies_to_AHZ(jiffies));
+        jiffies = cputime_to_jiffies(cputime_add(current->group_leader->stime,
+                                                 current->signal->stime));
+        ac.ac_stime = encode_comp_t(jiffies_to_AHZ(jiffies));
         /* we really need to bite the bullet and change layout */
         ac.ac_uid = current->uid;
         ac.ac_gid = current->gid;
@@ -580,7 +581,8 @@ void acct_process(long exitcode)
 void acct_update_integrals(struct task_struct *tsk)
 {
         if (likely(tsk->mm)) {
-                long delta = tsk->stime - tsk->acct_stimexpd;
+                long delta =
+                        cputime_to_jiffies(tsk->stime) - tsk->acct_stimexpd;
 
                 if (delta == 0)
                         return;