2 files changed, 5 insertions, 17 deletions

diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index 3e276eb23d1b..787e1bb5aafc 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -52,7 +52,8 @@ extern unsigned long set_phys_range_identity(unsigned long pfn_s,
 extern int m2p_add_override(unsigned long mfn, struct page *page,
                             struct gnttab_map_grant_ref *kmap_op);
 extern int m2p_remove_override(struct page *page,
-                                struct gnttab_map_grant_ref *kmap_op);
+                               struct gnttab_map_grant_ref *kmap_op,
+                               unsigned long mfn);
 extern struct page *m2p_find_override(unsigned long mfn);
 extern unsigned long m2p_find_override_pfn(unsigned long mfn, unsigned long pfn);
 
@@ -121,7 +122,7 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn)
                 pfn = m2p_find_override_pfn(mfn, ~0);
         }
 
-        /* 
+        /*
          * pfn is ~0 if there are no entries in the m2p for mfn or if the
          * entry doesn't map back to the mfn and m2p_override doesn't have a
          * valid entry for it.
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 696c694986d0..8009acbe41e4 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -899,13 +899,6 @@ int m2p_add_override(unsigned long mfn, struct page *page,
                                         "m2p_add_override: pfn %lx not mapped", pfn))
                         return -EINVAL;
         }
-        WARN_ON(PagePrivate(page));
-        SetPagePrivate(page);
-        set_page_private(page, mfn);
-        page->index = pfn_to_mfn(pfn);
-
-        if (unlikely(!set_phys_to_machine(pfn, FOREIGN_FRAME(mfn))))
-                return -ENOMEM;
 
         if (kmap_op != NULL) {
                 if (!PageHighMem(page)) {
@@ -944,19 +937,16 @@ int m2p_add_override(unsigned long mfn, struct page *page,
 }
 EXPORT_SYMBOL_GPL(m2p_add_override);
 int m2p_remove_override(struct page *page,
-                struct gnttab_map_grant_ref *kmap_op)
+                        struct gnttab_map_grant_ref *kmap_op,
+                        unsigned long mfn)
 {
         unsigned long flags;
-        unsigned long mfn;
         unsigned long pfn;
         unsigned long uninitialized_var(address);
         unsigned level;
         pte_t *ptep = NULL;
 
         pfn = page_to_pfn(page);
-        mfn = get_phys_to_machine(pfn);
-        if (mfn == INVALID_P2M_ENTRY || !(mfn & FOREIGN_FRAME_BIT))
-                return -EINVAL;
 
         if (!PageHighMem(page)) {
                 address = (unsigned long)__va(pfn << PAGE_SHIFT);
@@ -970,10 +960,7 @@ int m2p_remove_override(struct page *page,
         spin_lock_irqsave(&m2p_override_lock, flags);
         list_del(&page->lru);
         spin_unlock_irqrestore(&m2p_override_lock, flags);
-        WARN_ON(!PagePrivate(page));
-        ClearPagePrivate(page);
 
-        set_phys_to_machine(pfn, page->index);
         if (kmap_op != NULL) {
                 if (!PageHighMem(page)) {
                         struct multicall_space mcs;