Merge commit 'origin/master' into next

1 files changed, 5 insertions, 1 deletions

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 43f891b05a4b..00d59d048edf 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -122,8 +122,10 @@ void acct_update_integrals(struct task_struct *tsk)
         if (likely(tsk->mm)) {
                 cputime_t time, dtime;
                 struct timeval value;
+                unsigned long flags;
                 u64 delta;
 
+                local_irq_save(flags);
                 time = tsk->stime + tsk->utime;
                 dtime = cputime_sub(time, tsk->acct_timexpd);
                 jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
@@ -131,10 +133,12 @@ void acct_update_integrals(struct task_struct *tsk)
                 delta = delta * USEC_PER_SEC + value.tv_usec;
 
                 if (delta == 0)
-                        return;
+                        goto out;
                 tsk->acct_timexpd = time;
                 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
                 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
+        out:
+                local_irq_restore(flags);
         }
 }