lguest: make pending notifications per-vcpu

this patch makes the pending_notify field, used to control
pending notifications, per-vcpu, instead of per-guest

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index 0563764..95b473c 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -51,6 +51,8 @@
 	u32 esp1;
 	u8 ss1;
 
+	unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
+
 	/* At end of a page shared mapped over lguest_pages in guest.  */
 	unsigned long regs_page;
 	struct lguest_regs *regs;
@@ -95,7 +97,6 @@
 	struct pgdir pgdirs[4];
 
 	unsigned long noirq_start, noirq_end;
-	unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
 
 	unsigned int stack_pages;
 	u32 tsc_khz;