Commit a1839272 authored by Fenkart/Bostandzhyan's avatar Fenkart/Bostandzhyan Committed by Russell King
Browse files

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



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

Signed-off-by: default avatarAndreas Fenkart <andreas.fenkart@streamunlimited.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c931b4f6

arch/arm/mm/init.c

+17 −0
Original line number Diff line number Diff line
@@ -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;

		/*