x86/shadow: don't needlessly expose internal functions

... and drop an unused one.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -2383,7 +2383,7 @@ int sh_remove_write_access_from_sl1p(str
 /* Remove all mappings of a guest frame from the shadow tables.
  * Returns non-zero if we need to flush TLBs. */
 
-int sh_remove_all_mappings(struct vcpu *v, mfn_t gmfn)
+static int sh_remove_all_mappings(struct vcpu *v, mfn_t gmfn)
 {
     struct page_info *page = mfn_to_page(gmfn);
 
--- a/xen/arch/x86/mm/shadow/private.h
+++ b/xen/arch/x86/mm/shadow/private.h
@@ -387,6 +387,11 @@ int shadow_write_guest_entry(struct vcpu
 int shadow_cmpxchg_guest_entry(struct vcpu *v, intpte_t *p,
                                intpte_t *old, intpte_t new, mfn_t gmfn);
 
+/* Update all the things that are derived from the guest's CR0/CR3/CR4.
+ * Called to initialize paging structures if the paging mode
+ * has changed, and when bringing up a VCPU for the first time. */
+void shadow_update_paging_modes(struct vcpu *v);
+
 /* Unhook the non-Xen mappings in this top-level shadow mfn.
  * With user_only == 1, unhooks only the user-mode mappings. */
 void shadow_unhook_mappings(struct vcpu *v, mfn_t smfn, int user_only);
--- a/xen/include/asm-x86/shadow.h
+++ b/xen/include/asm-x86/shadow.h
@@ -77,23 +77,6 @@ void shadow_teardown(struct domain *d);
 /* Call once all of the references to the domain have gone away */
 void shadow_final_teardown(struct domain *d);
 
-/* Update all the things that are derived from the guest's CR0/CR3/CR4.
- * Called to initialize paging structures if the paging mode
- * has changed, and when bringing up a VCPU for the first time. */
-void shadow_update_paging_modes(struct vcpu *v);
-
-
-/* Remove all mappings of the guest page from the shadows. 
- * This is called from common code.  It does not flush TLBs. */
-int sh_remove_all_mappings(struct vcpu *v, mfn_t target_mfn);
-static inline void 
-shadow_drop_references(struct domain *d, struct page_info *p)
-{
-    if ( unlikely(shadow_mode_enabled(d)) )
-        /* See the comment about locking in sh_remove_all_mappings */
-        sh_remove_all_mappings(d->vcpu[0], _mfn(page_to_mfn(p)));
-}
-
 /* Remove all shadows of the guest mfn. */
 void sh_remove_shadows(struct vcpu *v, mfn_t gmfn, int fast, int all);
 static inline void shadow_remove_all_shadows(struct vcpu *v, mfn_t gmfn)