From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 21 Feb 2008 15:15:36 +0000 (+0000)
Subject: x86/64: Fix PAE-on-64 mmuext_op() preemption.
X-Git-Tag: 3.1.4-rc1~31
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=e59fd74032752e324410d9162784fe940d923660;p=people%2Fvhanquez%2Fxen.git

x86/64: Fix PAE-on-64 mmuext_op() preemption.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
xen-unstable changeset:   17096:ea1dc85d7122c6f0c11afbe4500c191b6896056f
xen-unstable date:        Wed Feb 20 18:18:03 2008 +0000
---

diff --git a/xen/arch/x86/x86_64/compat/mm.c b/xen/arch/x86/x86_64/compat/mm.c
index 34795d16e..98235e721 100644
--- 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;