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-rw-r--r--kernel/acct.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/acct.c b/kernel/acct.c
index ca5619039367..69a40c9777a2 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -485,12 +485,9 @@ static void do_acct_process(struct file *file)
ac.ac_ppid = current->parent->tgid;
#endif
- mutex_lock(&tty_mutex);
- tty = get_current_tty();
- ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
- mutex_unlock(&tty_mutex);
-
spin_lock_irq(&current->sighand->siglock);
+ tty = current->signal->tty;
+ ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
ac.ac_flag = pacct->ac_flag;