[PATCH] AB-BA deadlock between uidhash_lock and tasklist_lock.

switch_uid() doesn't care about tasklist_lock, so do it outside
the lock and avoid a subtle (and very very unlikely to trigger)
AB-BA deadlock.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/exit.c

@@ -242,9 +242,8 @@ void reparent_to_init(void)
 	memcpy(current->signal->rlim, init_task.signal->rlim,
 	       sizeof(current->signal->rlim));
 	atomic_inc(&(INIT_USER->__count));
-	switch_uid(INIT_USER);
-
 	write_unlock_irq(&tasklist_lock);
+	switch_uid(INIT_USER);
 }
 
 void __set_special_pids(pid_t session, pid_t pgrp)