repository: /home/avi/kvm/linux-2.6
branch: master
commit 9b6895d0e4bb62f46bdd05c7e4b4e99709462385
Author: Avi Kivity <[EMAIL PROTECTED]>
Date: Wed Oct 17 11:03:06 2007 +0200
Revert "KVM: MMU: Call update_dirty_bit() without disabling preemption"
This reverts commit 5a691bafbc79643d60f1925a581d1af5a9f0f60d. It unmaps
walker->table while leaving ptep pointing into it. Fails spectacularly on
i386.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 28c7377..a9e687b 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -160,8 +160,6 @@ static int FNAME(walk_addr)(struct guest_walker *walker,
if (walker->level == PT_PAGE_TABLE_LEVEL) {
walker->gfn = (*ptep & PT_BASE_ADDR_MASK)
>> PAGE_SHIFT;
- kunmap_atomic(walker->table, KM_USER0);
- walker->table = NULL;
FNAME(update_dirty_bit)(vcpu, write_fault, ptep,
table_gfn);
break;
@@ -173,8 +171,6 @@ static int FNAME(walk_addr)(struct guest_walker *walker,
walker->gfn = (*ptep & PT_DIR_BASE_ADDR_MASK)
>> PAGE_SHIFT;
walker->gfn += PT_INDEX(addr, PT_PAGE_TABLE_LEVEL);
- kunmap_atomic(walker->table, KM_USER0);
- walker->table = NULL;
FNAME(update_dirty_bit)(vcpu, write_fault, ptep,
table_gfn);
break;
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