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unmap_and_free_physical_pages(): Don't try to free already free pages.

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Apparently (at least when running in VMware >=2) the boot loader can still
map the same physical page more than once -- in the ACPI or HPET code I
suppose -- which would lead to this situation.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34954 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-01-08 20:01:19 +00:00
parent 1de5dffb8a
commit aac9b8e4af
1 changed files with 2 additions and 1 deletions
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3
src/system/kernel/vm/vm.cpp
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@ -2929,7 +2929,8 @@ unmap_and_free_physical_pages(vm_translation_map* map, addr_t start, addr_t end)
if (map->ops->query(map, current, &physicalAddress, &flags) == B_OK
&& (flags & PAGE_PRESENT) != 0) {
vm_page* page = vm_lookup_page(physicalAddress / B_PAGE_SIZE);
if (page != NULL) {
if (page != NULL && page->state != PAGE_STATE_FREE
&& page->state != PAGE_STATE_CLEAR) {
DEBUG_PAGE_ACCESS_START(page);
vm_page_set_state(page, PAGE_STATE_FREE);
}