From: Avi Kivity <avi@qumranet.com>
Date: Fri, 2 May 2008 10:23:10 +0000 (+0300)
Subject: KVM: MMU: Allow more than PAGES_PER_HPAGE write protections per large page
X-Git-Tag: v2.6.26-rc2~80^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93df766322ba1db2801e4b826985a4932dd75866;p=linux-2.6

KVM: MMU: Allow more than PAGES_PER_HPAGE write protections per large page

nonpae guests can call rmap_write_protect twice per page (for page tables)
or four times per page (for page directories), triggering a bogus warning.

Remove the warning.

Signed-off-by: Avi Kivity <avi@qumranet.com>
---

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d9344be364..36c5406b18 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -376,7 +376,6 @@ static void account_shadowed(struct kvm *kvm, gfn_t gfn)
 
 	write_count = slot_largepage_idx(gfn, gfn_to_memslot(kvm, gfn));
 	*write_count += 1;
-	WARN_ON(*write_count > KVM_PAGES_PER_HPAGE);
 }
 
 static void unaccount_shadowed(struct kvm *kvm, gfn_t gfn)