xen: use iret instruction all the time

Change iret implementation to not be dependent on direct-access vcpu
structure.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 8 deletions

diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S
index 6b7190449d07..fe161ed4b01e 100644
--- a/arch/x86/xen/xen-asm.S
+++ b/arch/x86/xen/xen-asm.S
@@ -135,13 +135,8 @@ ENDPATCH(xen_restore_fl_direct)
         current stack state in whatever form its in, we keep things
         simple by only using a single register which is pushed/popped
         on the stack.
-
-        Non-direct iret could be done in the same way, but it would
-        require an annoying amount of code duplication.  We'll assume
-        that direct mode will be the common case once the hypervisor
-        support becomes commonplace.
  */
-ENTRY(xen_iret_direct)
+ENTRY(xen_iret)
         /* test eflags for special cases */
         testl $(X86_EFLAGS_VM | XEN_EFLAGS_NMI), 8(%esp)
         jnz hyper_iret
@@ -155,9 +150,9 @@ ENTRY(xen_iret_direct)
         GET_THREAD_INFO(%eax)
         movl TI_cpu(%eax),%eax
         movl __per_cpu_offset(,%eax,4),%eax
-        lea per_cpu__xen_vcpu_info(%eax),%eax
+        mov per_cpu__xen_vcpu(%eax),%eax
 #else
-        movl $per_cpu__xen_vcpu_info, %eax
+        movl per_cpu__xen_vcpu, %eax
 #endif
 
         /* check IF state we're restoring */