There's a function-wide variable rc, so no need to re-declare it in
individual case handling blocks.

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

--- 2010-01-06.orig/xen/arch/x86/mm.c	2010-01-06 11:23:46.000000000 +0100
+++ 2010-01-06/xen/arch/x86/mm.c	2010-01-12 12:03:44.000000000 +0100
@@ -4237,7 +4237,6 @@ long arch_memory_op(int op, XEN_GUEST_HA
         struct xen_add_to_physmap xatp;
         unsigned long prev_mfn, mfn = 0, gpfn;
         struct domain *d;
-        int rc;
 
         if ( copy_from_guest(&xatp, arg, 1) )
             return -EFAULT;
@@ -4349,7 +4348,6 @@ long arch_memory_op(int op, XEN_GUEST_HA
     {
         struct xen_foreign_memory_map fmap;
         struct domain *d;
-        int rc;
 
         if ( copy_from_guest(&fmap, arg, 1) )
             return -EFAULT;
@@ -4401,7 +4399,6 @@ long arch_memory_op(int op, XEN_GUEST_HA
         struct memory_map_context ctxt;
         XEN_GUEST_HANDLE(e820entry_t) buffer;
         unsigned int i;
-        int rc;
 
         if ( !IS_PRIV(current->domain) )
             return -EINVAL;