+
+#ifdef CONFIG_TASK_XACCT
+
+#define KB 1024
+#define MB (1024*KB)
+/*
+ * fill in extended accounting fields
+ */
+void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
+{
+ struct mm_struct *mm;
+
+ /* convert pages-usec to Mbyte-usec */
+ stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
+ stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
+ mm = get_task_mm(p);
+ if (mm) {
+ /* adjust to KB unit */
+ stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
+ stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
+ mmput(mm);
+ }
+ stats->read_char = p->ioac.rchar;
+ stats->write_char = p->ioac.wchar;
+ stats->read_syscalls = p->ioac.syscr;
+ stats->write_syscalls = p->ioac.syscw;
+#ifdef CONFIG_TASK_IO_ACCOUNTING
+ stats->read_bytes = p->ioac.read_bytes;
+ stats->write_bytes = p->ioac.write_bytes;
+ stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
+#else
+ stats->read_bytes = 0;
+ stats->write_bytes = 0;
+ stats->cancelled_write_bytes = 0;
+#endif
+}
+#undef KB
+#undef MB
+
+/**
+ * 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)) {
+ 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);
+ delta = value.tv_sec;
+ delta = delta * USEC_PER_SEC + value.tv_usec;
+
+ if (delta == 0)
+ 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);
+ }
+}
+
+/**
+ * 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_timexpd = 0;
+ tsk->acct_rss_mem1 = 0;
+ tsk->acct_vm_mem1 = 0;
+}
+#endif