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take into account areas starting or ending equally

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24612 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Jérôme Duval 2008-03-27 22:31:42 +00:00
parent 071f9c3aa2
commit 9fcee65eaf
1 changed files with 4 additions and 4 deletions
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8
src/system/kernel/arch/x86/arch_vm.cpp
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@ -93,15 +93,15 @@ is_memory_overlapping(uint64 base, uint64 length, int32 *extendedIndex)
x86_get_mtrr(index, &b, &l, &t);
// check first for write combining extensions
if (base < b
&& (base + length) > (b + l)
if (base <= b
&& (base + length) >= (b + l)
&& t == IA32_MTR_WRITE_COMBINING) {
*extendedIndex = index;
return true;
}
if ((base > b && base < (b + l))
if ((base >= b && base < (b + l))
|| ((base + length) > b
&& (base + length) < (b + l)))
&& (base + length) <= (b + l)))
return true;
}
}