[PATCH] rcu: Mention rcu_bh in description of rcutorture's torture_type parameter
[linux-2.6.git] / kernel / acct.c
index 2a7c933..0aad5ca 100644 (file)
@@ -483,10 +483,14 @@ static void do_acct_process(struct file *file)
        ac.ac_ppid = current->parent->tgid;
 #endif
 
-       read_lock(&tasklist_lock);      /* pin current->signal */
+       mutex_lock(&tty_mutex);
+       /* FIXME: Whoever is responsible for current->signal locking needs
+          to use the same locking all over the kernel and document it */
+       read_lock(&tasklist_lock);
        ac.ac_tty = current->signal->tty ?
                old_encode_dev(tty_devnum(current->signal->tty)) : 0;
        read_unlock(&tasklist_lock);
+       mutex_unlock(&tty_mutex);
 
        spin_lock_irq(&current->sighand->siglock);
        ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
@@ -598,33 +602,3 @@ void acct_process(void)
        do_acct_process(file);
        fput(file);
 }
-
-
-/**
- * acct_update_integrals - update mm integral fields in task_struct
- * @tsk: task_struct for accounting
- */
-void acct_update_integrals(struct task_struct *tsk)
-{
-       if (likely(tsk->mm)) {
-               long delta =
-                       cputime_to_jiffies(tsk->stime) - tsk->acct_stimexpd;
-
-               if (delta == 0)
-                       return;
-               tsk->acct_stimexpd = tsk->stime;
-               tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
-               tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
-       }
-}
-
-/**
- * acct_clear_integrals - clear the mm integral fields in task_struct
- * @tsk: task_struct whose accounting fields are cleared
- */
-void acct_clear_integrals(struct task_struct *tsk)
-{
-       tsk->acct_stimexpd = 0;
-       tsk->acct_rss_mem1 = 0;
-       tsk->acct_vm_mem1 = 0;
-}