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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>
This commit is contained in:
Fenkart/Bostandzhyan 2010-02-07 21:47:58 +01:00 committed by Russell King
parent c931b4f655
commit a183927213
1 changed files with 17 additions and 0 deletions
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17
arch/arm/mm/init.c
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@ -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;
/*