[PATCH] taskstats: cleanup do_exit() path

do_exit:
	taskstats_exit_alloc()
	...
	taskstats_exit_send()
	taskstats_exit_free()

I think this is not good, let it be a single function exported to the core
kernel, taskstats_exit(), which does alloc + send + free itself.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index 06de6c4..4e3f919 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -850,9 +850,7 @@
 fastcall NORET_TYPE void do_exit(long code)
 {
 	struct task_struct *tsk = current;
-	struct taskstats *tidstats;
 	int group_dead;
-	unsigned int mycpu;
 
 	profile_task_exit(tsk);
 
@@ -890,8 +888,6 @@
 				current->comm, current->pid,
 				preempt_count());
 
-	taskstats_exit_alloc(&tidstats, &mycpu);
-
 	acct_update_integrals(tsk);
 	if (tsk->mm) {
 		update_hiwater_rss(tsk->mm);
@@ -911,8 +907,8 @@
 #endif
 	if (unlikely(tsk->audit_context))
 		audit_free(tsk);
-	taskstats_exit_send(tsk, tidstats, group_dead, mycpu);
-	taskstats_exit_free(tidstats);
+
+	taskstats_exit(tsk, group_dead);
 
 	exit_mm(tsk);