itimers: Merge ITIMER_VIRT and ITIMER_PROF

Both cpu itimers have same data flow in the few places, this
patch make unification of code related with VIRT and PROF
itimers.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
LKML-Reference: <1248862529-6063-2-git-send-email-sgruszka@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 3 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3ab08e4bb6b8..3b3efaddd953 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -470,6 +470,11 @@ struct pacct_struct {
         unsigned long           ac_minflt, ac_majflt;
 };
 
+struct cpu_itimer {
+        cputime_t expires;
+        cputime_t incr;
+};
+
 /**
  * struct task_cputime - collected CPU time counts
  * @utime:              time spent in user mode, in &cputime_t units
@@ -564,9 +569,12 @@ struct signal_struct {
         struct pid *leader_pid;
         ktime_t it_real_incr;
 
-        /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
-        cputime_t it_prof_expires, it_virt_expires;
-        cputime_t it_prof_incr, it_virt_incr;
+        /*
+         * ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use
+         * CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these
+         * values are defined to 0 and 1 respectively
+         */
+        struct cpu_itimer it[2];
 
         /*
          * Thread group totals for process CPU timers.