From patchwork Mon Dec  3 06:19:22 2012
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Subject: [powerpc] Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32
From: Li Zhong <zhong@linux.vnet.ibm.com>
X-Patchwork-Id: 203294
Message-Id: <1354515562.3243.27.camel@ThinkPad-T5421.cn.ibm.com>
To: PowerPC email list <linuxppc-dev@lists.ozlabs.org>
Cc: Christian Kujau <lists@nerdbynature.de>, Paul Mackerras <paulus@samba.org>
Date: Mon, 03 Dec 2012 14:19:22 +0800

This patch fixes MAX_STACK_TRACE_ENTRIES too low warning for ppc32,
which is similar to commit 12660b17. 

Reported-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>

---
arch/powerpc/kernel/entry_32.S |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index d22e73e..e514de5 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -439,6 +439,8 @@ ret_from_fork:
 ret_from_kernel_thread:
 	REST_NVGPRS(r1)
 	bl	schedule_tail
+	li	r3,0
+	stw	r3,0(r1)
 	mtlr	r14
 	mr	r3,r15
 	PPC440EP_ERR42