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-rw-r--r--mm/swap.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/mm/swap.c b/mm/swap.c
index 4929bc1be60e..4d7d37eb3c40 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -320,11 +320,6 @@ static inline void activate_page_drain(int cpu)
{
}
-static bool need_activate_page_drain(int cpu)
-{
- return false;
-}
-
void activate_page(struct page *page)
{
struct zone *zone = page_zone(page);
@@ -653,13 +648,15 @@ void lru_add_drain(void)
put_cpu();
}
+#ifdef CONFIG_SMP
+
+static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work);
+
static void lru_add_drain_per_cpu(struct work_struct *dummy)
{
lru_add_drain();
}
-static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work);
-
/*
* Doesn't need any cpu hotplug locking because we do rely on per-cpu
* kworkers being shut down before our page_alloc_cpu_dead callback is
@@ -702,6 +699,12 @@ void lru_add_drain_all(void)
mutex_unlock(&lock);
}
+#else
+void lru_add_drain_all(void)
+{
+ lru_add_drain();
+}
+#endif
/**
* release_pages - batched put_page()