From 54b8f87dadb0cf99ccacfedbc5212ebb747f9698 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Tue, 26 Jul 2011 08:18:32 +0200
Subject: [PATCH] lm32: Disable interrupts while restoring irq and syscall
 stackframe

---
 arch/lm32/boot/dts/mm1.dts | 4 ++--
 arch/lm32/kernel/entry.S   | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/lm32/boot/dts/mm1.dts b/arch/lm32/boot/dts/mm1.dts
index b3d7dff231de2..24535c1225fe1 100644
--- a/arch/lm32/boot/dts/mm1.dts
+++ b/arch/lm32/boot/dts/mm1.dts
@@ -6,12 +6,12 @@
 	interrupt-parent = <&pic>;
 
 	chosen {
-		bootargs = "root=/dev/root";
+		bootargs = "root=/dev/ram0 rootfstype=ext2 init=/bin/foobar.sh";
 	};
 
 	memory@0 {
 		device_type = "memory";
-		reg = <0x00000000 0x8000000>;
+		reg = <0x40000000 0x8000000>;
 	};
 
 	cpus {
diff --git a/arch/lm32/kernel/entry.S b/arch/lm32/kernel/entry.S
index 37ee1466bcd86..e522718913472 100644
--- a/arch/lm32/kernel/entry.S
+++ b/arch/lm32/kernel/entry.S
@@ -261,6 +261,9 @@ ret
 
 /* restore all caller saved registers saved in _save_irq_frame and return from exception */
 _restore_irq_frame_and_return:
+	rcsr r2, IE
+	andi r3, r2, 0xfffe
+	wcsr IE, r3
 	lw r2, (sp+132)
 	mvhi r1, hi(kernel_mode)
 	ori r1, r1, lo(kernel_mode)
@@ -332,6 +335,9 @@ _save_syscall_frame:
 
 #define RETURN_FROM_SYSCALL_OR_EXCEPTION(label, addr_register, return_instr) \
 label: \
+	rcsr r2, IE; \
+	andi r3, r2, 0xfffe; \
+	wcsr IE, r3; \
 	lw r2, (sp+132); \
 	mvhi r1, hi(kernel_mode); \
 	ori r1, r1, lo(kernel_mode); \