From: Fenkart/Bostandzhyan <andreas.fenkart@streamunlimited.com>
Date: Sun, 7 Feb 2010 20:47:58 +0000 (+0100)
Subject: ARM: 5929/1: Add checks to detect overlap of memory regions.
X-Git-Tag: v3.12-rc1~11254^2~1^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a183927213df225bd93d21857b6aaafbb95e590d;p=kernel%2Fkernel-generic.git

ARM: 5929/1: Add checks to detect overlap of memory regions.

Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>

Signed-off-by: Andreas Fenkart <andreas.fenkart@streamunlimited.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 3a20772..7829cb5 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -686,6 +686,23 @@ void __init mem_init(void)
 #undef MLM
 #undef MLK_ROUNDUP
 
+	/*
+	 * Check boundaries twice: Some fundamental inconsistencies can
+	 * be detected at build time already.
+	 */
+#ifdef CONFIG_MMU
+	BUILD_BUG_ON(VMALLOC_END			> CONSISTENT_BASE);
+	BUG_ON(VMALLOC_END				> CONSISTENT_BASE);
+
+	BUILD_BUG_ON(TASK_SIZE				> MODULES_VADDR);
+	BUG_ON(TASK_SIZE 				> MODULES_VADDR);
+#endif
+
+#ifdef CONFIG_HIGHMEM
+	BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
+	BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE	> PAGE_OFFSET);
+#endif
+
 	if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
 		extern int sysctl_overcommit_memory;
 		/*