x86/64: Fix PAE-on-64 mmuext_op() preemption.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

diff --git a/xen/arch/x86/x86_64/compat/mm.c b/xen/arch/x86/x86_64/compat/mm.c
index 14a5f3001f7ecb9337656ddd4b204e0a48b52696..256f7a5ac87158bfc7a8816d8ab286145cda45d2 100644 (file)
--- a/xen/arch/x86/x86_64/compat/mm.c
+++ b/xen/arch/x86/x86_64/compat/mm.c
@@ -194,19 +194,9 @@ int compat_mmuext_op(XEN_GUEST_HANDLE(mmuext_op_compat_t) cmp_uops,
     for ( ; count; count -= i )
     {
         mmuext_op_t *nat_op = nat_ops.p;
-        unsigned int limit;
+        unsigned int limit = COMPAT_ARG_XLAT_SIZE / sizeof(*nat_op);
         int err;
 
-        if ( hypercall_preempt_check() )
-        {
-            rc = hypercall_create_continuation(
-                __HYPERVISOR_mmuext_op, "hihi",
-                cmp_uops, count | MMU_UPDATE_PREEMPTED, pdone, foreigndom);
-            break;
-        }
-
-        limit = COMPAT_ARG_XLAT_SIZE / sizeof(*nat_op);
-
         for ( i = 0; i < min(limit, count); ++i )
         {
             mmuext_op_compat_t cmp_op;