[PATCH] revert "timer exit cleanup"

Revert this June 17 patch: it broke persistence of timers across execve().

Cc: Roland McGrath <roland@redhat.com>
Cc: george anzinger <george@mvista.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/exit.c

@@ -829,8 +829,10 @@ fastcall NORET_TYPE void do_exit(long code)
 	acct_update_integrals(tsk);
 	update_mem_hiwater(tsk);
 	group_dead = atomic_dec_and_test(&tsk->signal->live);
-	if (group_dead)
+	if (group_dead) {
+ 		del_timer_sync(&tsk->signal->real_timer);
 		acct_process(code);
+	}
 	exit_mm(tsk);
 
 	exit_sem(tsk);

kernel/posix-timers.c

@@ -1166,7 +1166,6 @@ void exit_itimers(struct signal_struct *sig)
 		tmr = list_entry(sig->posix_timers.next, struct k_itimer, list);
 		itimer_delete(tmr);
 	}
-	del_timer_sync(&sig->real_timer);
 }
 
 /*