[PATCH] x86: drop a bogus SHARED_M2P() check from Dom0 building code

[Jan Beulich]

If anything, a check covering a wider range of invalid M2P entries ought
to be used (e.g. VALID_M2P()). But since everything is fully under Xen's
control at this stage, simply remove the BUG_ON().

Signed-off-by: Jan Beulich <jbeul...@suse.com>

--- a/xen/arch/x86/pv/dom0_build.c
+++ b/xen/arch/x86/pv/dom0_build.c
@@ -815,7 +815,6 @@ int __init dom0_construct_pv(struct doma
     page_list_for_each ( page, &d->page_list )
     {
         mfn = mfn_x(page_to_mfn(page));
-        BUG_ON(SHARED_M2P(get_gpfn_from_mfn(mfn)));
         if ( get_gpfn_from_mfn(mfn) >= count )
         {
             BUG_ON(compat);