From 178d2c3f85d9e9198358e0d008bc8feb78a55e60 Mon Sep 17 00:00:00 2001
From: Ken Sumrall <ksumrall@android.com>
Date: Tue, 28 Sep 2010 20:40:59 -0700
Subject: [PATCH] Reserve the first 4K of phys ram for safety from errant
 drivers/hardware.

Signed-off-by: Ken Sumrall <ksumrall@android.com>
---
 arch/arm/mach-tegra/board-stingray.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-tegra/board-stingray.c b/arch/arm/mach-tegra/board-stingray.c
index f013e6458499..ece5dd386322 100644
--- a/arch/arm/mach-tegra/board-stingray.c
+++ b/arch/arm/mach-tegra/board-stingray.c
@@ -30,6 +30,7 @@
 #include <linux/reboot.h>
 #include <linux/i2c-tegra.h>
 #include <linux/spi/cpcap.h>
+#include <linux/bootmem.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -1044,6 +1045,10 @@ static void __init tegra_stingray_init(void)
 
 void __init stingray_map_io(void)
 {
+	if (reserve_bootmem(0x0, 4096, BOOTMEM_EXCLUSIVE) != 0) {
+		printk(KERN_WARNING "Cannot reserve first 4K of memory for safety\n");
+	}
+
 	tegra_map_common_io();
 	stingray_fb_alloc();
 }
-- 
2.34.1