posix-timers: Cleanup restart_block usage

posix timers still use the legacy arg0-arg3 members of
restart_block. Use restart_block.nanosleep instead

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <johnstul@us.ibm.com>
Tested-by: Richard Cochran <richard.cochran@omicron.at>
LKML-Reference: <20110201134418.232288779@linutronix.de>
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 4dd86d1..4762986 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -1034,7 +1034,7 @@
  */
 long clock_nanosleep_restart(struct restart_block *restart_block)
 {
-	clockid_t which_clock = restart_block->arg0;
+	clockid_t which_clock = restart_block->nanosleep.index;
 	struct k_clock *kc = clockid_to_kclock(which_clock);
 
 	if (WARN_ON_ONCE(!kc || !kc->nsleep_restart))