lguest: Use this_cpu_ops

Use this_cpu_ops in a couple of places in lguest.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

arch/x86/lguest/boot.c

@@ -824,7 +824,7 @@ static void __init lguest_init_IRQ(void)
 
 	for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
 		/* Some systems map "vectors" to interrupts weirdly.  Not us! */
-		__get_cpu_var(vector_irq)[i] = i - FIRST_EXTERNAL_VECTOR;
+		__this_cpu_write(vector_irq[i]) = i - FIRST_EXTERNAL_VECTOR;
 		if (i != SYSCALL_VECTOR)
 			set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
 	}

drivers/lguest/page_tables.c

@@ -1137,7 +1137,7 @@ void free_guest_pagetable(struct lguest *lg)
  */
 void map_switcher_in_guest(struct lg_cpu *cpu, struct lguest_pages *pages)
 {
-	pte_t *switcher_pte_page = __get_cpu_var(switcher_pte_pages);
+	pte_t *switcher_pte_page = __this_cpu_read(switcher_pte_pages);
 	pte_t regs_pte;
 
 #ifdef CONFIG_X86_PAE

drivers/lguest/x86/core.c

@@ -90,8 +90,8 @@ static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
 	 * meanwhile).  If that's not the case, we pretend everything in the
 	 * Guest has changed.
 	 */
-	if (__get_cpu_var(lg_last_cpu) != cpu || cpu->last_pages != pages) {
-		__get_cpu_var(lg_last_cpu) = cpu;
+	if (__this_cpu_read(lg_last_cpu) != cpu || cpu->last_pages != pages) {
+		__this_cpu_read(lg_last_cpu) = cpu;
 		cpu->last_pages = pages;
 		cpu->changed = CHANGED_ALL;
 	}