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-rw-r--r--drivers/xen/tmem.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/xen/tmem.c b/drivers/xen/tmem.c
index 18e8bd8fa947..0f0493c63371 100644
--- a/drivers/xen/tmem.c
+++ b/drivers/xen/tmem.c
@@ -41,6 +41,8 @@ module_param(selfballooning, bool, S_IRUGO);
#ifdef CONFIG_FRONTSWAP
static bool frontswap __read_mostly = true;
module_param(frontswap, bool, S_IRUGO);
+#else /* CONFIG_FRONTSWAP */
+#define frontswap (0)
#endif /* CONFIG_FRONTSWAP */
#ifdef CONFIG_XEN_SELFBALLOONING
@@ -377,10 +379,10 @@ static int xen_tmem_init(void)
#ifdef CONFIG_FRONTSWAP
if (tmem_enabled && frontswap) {
char *s = "";
- struct frontswap_ops *old_ops =
- frontswap_register_ops(&tmem_frontswap_ops);
+ struct frontswap_ops *old_ops;
tmem_frontswap_poolid = -1;
+ old_ops = frontswap_register_ops(&tmem_frontswap_ops);
if (IS_ERR(old_ops) || old_ops) {
if (IS_ERR(old_ops))
return PTR_ERR(old_ops);