i386/xen: add proper unwind annotations to xen_sysenter_target

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 6bc07f0..ad5264c 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1024,6 +1024,7 @@
 ENTRY(xen_sysenter_target)
 	RING0_INT_FRAME
 	addl $5*4, %esp		/* remove xen-provided frame */
+	CFI_ADJUST_CFA_OFFSET -5*4
 	jmp sysenter_past_esp
 	CFI_ENDPROC