From: Alan Cox <alan@lxorguk.ukuu.org.uk>

If we are going to BUG() not panic() here then we should cover the case of
the BUG being compiled out

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/exit.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -puN kernel/exit.c~exit-fix-crash-case kernel/exit.c
--- a/kernel/exit.c~exit-fix-crash-case
+++ a/kernel/exit.c
@@ -964,7 +964,8 @@ fastcall NORET_TYPE void do_exit(long co
 	schedule();
 	BUG();
 	/* Avoid "noreturn function does return".  */
-	for (;;) ;
+	for (;;)
+		cpu_relax();	/* For when BUG is null */
 }
 
 EXPORT_SYMBOL_GPL(do_exit);
_