tsacct: fix bacct_add_tsk()'s use of do_div()

[linux-2.6-omap-h63xx.git] / kernel / tsacct.c

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 1da6990af8e066d4be1d7d0f8b73d5a739f8dbb0..3da47ccdc5e594b242dc30f1e3471a27822c53f8 100644 (file)
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -28,14 +28,14 @@
 void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
 {
        struct timespec uptime, ts;
-       s64 ac_etime;
+       u64 ac_etime;
 
        BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
 
        /* calculate task elapsed time in timespec */
        do_posix_clock_monotonic_gettime(&uptime);
        ts = timespec_sub(uptime, tsk->start_time);
-       /* rebase elapsed time to usec */
+       /* rebase elapsed time to usec (should never be negative) */
        ac_etime = timespec_to_ns(&ts);
        do_div(ac_etime, NSEC_PER_USEC);
        stats->ac_etime = ac_etime;