From d68987865ef6260baef6d2afd625f569b1ebedd8 Mon Sep 17 00:00:00 2001
From: tianzy <tianzy>
Date: Wed, 3 Jun 2009 06:38:49 +0000
Subject: [PATCH] Branch HEAD fix "rhel5 i686 patchless build failure" b=19590
 i=johann i=brian

---
 lnet/autoconf/lustre-lnet.m4 | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lnet/autoconf/lustre-lnet.m4 b/lnet/autoconf/lustre-lnet.m4
index ddfce23..dbbdc09 100644
--- a/lnet/autoconf/lustre-lnet.m4
+++ b/lnet/autoconf/lustre-lnet.m4
@@ -907,10 +907,22 @@ AC_SUBST(RALND)
 AC_DEFUN([LN_FUNC_DUMP_TRACE],
 [LB_CHECK_SYMBOL_EXPORT([dump_trace],
 [kernel/ksyms.c arch/${LINUX_ARCH%_64}/kernel/traps_64.c],[
-	AC_DEFINE(HAVE_DUMP_TRACE, 1, [dump_trace is exported])
-	AC_MSG_CHECKING([whether print_trace_address has reliable argument])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
+	AC_MSG_CHECKING([whether we can really use dump_stack])
+	LB_LINUX_TRY_COMPILE([
+		struct task_struct;
+		struct pt_regs;
+		#include <asm/stacktrace.h>
+	],[
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_DUMP_TRACE, 1, [dump_trace is exported])
+	],[
+		AC_MSG_RESULT(no)
+	],[
+	])
+	AC_MSG_CHECKING([whether print_trace_address has reliable argument])
 	LB_LINUX_TRY_COMPILE([
 		struct task_struct;
 		struct pt_regs;
-- 
1.8.3.1