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[PATCH] KVM: MMU: kvm_mmu_put_page() only removes one link to the page 

...  and so must not free it unconditionally.

Move the freeing to kvm_mmu_zap_page().

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Avi Kivity 2007-01-05 16:36:47 -08:00 committed by Linus Torvalds
parent 697fe2e24a
commit cc4529efc7
1 changed files with 4 additions and 4 deletions
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8
drivers/kvm/mmu.c
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@ -521,10 +521,6 @@ static void kvm_mmu_put_page(struct kvm_vcpu *vcpu,
u64 *parent_pte)
{
mmu_page_remove_parent_pte(page, parent_pte);
kvm_mmu_page_unlink_children(vcpu, page);
hlist_del(&page->hash_link);
list_del(&page->link);
list_add(&page->link, &vcpu->free_pages);
}
static void kvm_mmu_zap_page(struct kvm_vcpu *vcpu,
@ -546,6 +542,10 @@ static void kvm_mmu_zap_page(struct kvm_vcpu *vcpu,
kvm_mmu_put_page(vcpu, page, parent_pte);
*parent_pte = 0;
}
kvm_mmu_page_unlink_children(vcpu, page);
hlist_del(&page->hash_link);
list_del(&page->link);
list_add(&page->link, &vcpu->free_pages);
}
static int kvm_mmu_unprotect_page(struct kvm_vcpu *vcpu, gfn_t gfn)