From 6792a3f47a2e42d7164292bf7f1a55cfc4c91652 Mon Sep 17 00:00:00 2001
From: Anton Arapov <anton@redhat.com>
Date: Fri, 8 Jun 2012 12:58:00 +0200
Subject: fedora kernel: b920e9b748c595f970bf80ede7832d39f8d567da

Signed-off-by: Anton Arapov <anton@redhat.com>
---
 arch/arm/kernel/setup.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

(limited to 'arch/arm/kernel/setup.c')

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index a255c39612c..ebfac782593 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -33,6 +33,7 @@
 #include <linux/sort.h>
 
 #include <asm/unified.h>
+#include <asm/cp15.h>
 #include <asm/cpu.h>
 #include <asm/cputype.h>
 #include <asm/elf.h>
@@ -44,12 +45,13 @@
 #include <asm/cacheflush.h>
 #include <asm/cachetype.h>
 #include <asm/tlbflush.h>
-#include <asm/system.h>
 
 #include <asm/prom.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/irq.h>
 #include <asm/mach/time.h>
+#include <asm/system_info.h>
+#include <asm/system_misc.h>
 #include <asm/traps.h>
 #include <asm/unwind.h>
 #include <asm/memblock.h>
@@ -521,7 +523,21 @@ int __init arm_add_memory(phys_addr_t start, unsigned long size)
 	 */
 	size -= start & ~PAGE_MASK;
 	bank->start = PAGE_ALIGN(start);
-	bank->size  = size & PAGE_MASK;
+
+#ifndef CONFIG_LPAE
+	if (bank->start + size < bank->start) {
+		printk(KERN_CRIT "Truncating memory at 0x%08llx to fit in "
+			"32-bit physical address space\n", (long long)start);
+		/*
+		 * To ensure bank->start + bank->size is representable in
+		 * 32 bits, we use ULONG_MAX as the upper limit rather than 4GB.
+		 * This means we lose a page after masking.
+		 */
+		size = ULONG_MAX - bank->start;
+	}
+#endif
+
+	bank->size = size & PAGE_MASK;
 
 	/*
 	 * Check whether this memory region has non-zero size or
@@ -974,7 +990,6 @@ void __init setup_arch(char **cmdline_p)
 	conswitchp = &dummy_con;
 #endif
 #endif
-	early_trap_init();
 
 	if (mdesc->init_early)
 		mdesc->init_early();
-- 
cgit