diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 58b72c0322af..7f4a4baa370a 100755
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -429,6 +429,74 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
 
 	__vmpressure(gfp, memcg, false, tree, scanned, reclaimed);
 }
+#else
+static void vmpressure_memcg(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
+		unsigned long scanned, unsigned long reclaimed)
+{
+}
+#endif
+
+static void vmpressure_global(gfp_t gfp, unsigned long scanned,
+		unsigned long reclaimed)
+{
+	struct vmpressure *vmpr = &global_vmpressure;
+	unsigned long pressure;
+
+	if (!(gfp & (__GFP_HIGHMEM | __GFP_MOVABLE | __GFP_IO | __GFP_FS)))
+		return;
+
+	if (!scanned)
+		return;
+
+	spin_lock(&vmpr->sr_lock);
+	vmpr->scanned += scanned;
+	vmpr->reclaimed += reclaimed;
+	scanned = vmpr->scanned;
+	reclaimed = vmpr->reclaimed;
+	spin_unlock(&vmpr->sr_lock);
+
+	if (scanned < vmpressure_win)
+		return;
+
+	spin_lock(&vmpr->sr_lock);
+	vmpr->scanned = 0;
+	vmpr->reclaimed = 0;
+	spin_unlock(&vmpr->sr_lock);
+
+	pressure = vmpressure_calc_pressure(scanned, reclaimed);
+	vmpressure_notify(pressure);
+}
+
+/**
+ * vmpressure() - Account memory pressure through scanned/reclaimed ratio
+ * @gfp:	reclaimer's gfp mask
+ * @memcg:	cgroup memory controller handle
+ * @tree:	legacy subtree mode
+ * @scanned:	number of pages scanned
+ * @reclaimed:	number of pages reclaimed
+ *
+ * This function should be called from the vmscan reclaim path to account
+ * "instantaneous" memory pressure (scanned/reclaimed ratio). The raw
+ * pressure index is then further refined and averaged over time.
+ *
+ * If @tree is set, vmpressure is in traditional userspace reporting
+ * mode: @memcg is considered the pressure root and userspace is
+ * notified of the entire subtree's reclaim efficiency.
+ *
+ * If @tree is not set, reclaim efficiency is recorded for @memcg, and
+ * only in-kernel users are notified.
+ *
+ * This function does not return any value.
+ */
+void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
+		unsigned long scanned, unsigned long reclaimed)
+{
+	if (!memcg && tree)
+		vmpressure_global(gfp, scanned, reclaimed);
+
+	if (IS_ENABLED(CONFIG_MEMCG))
+		vmpressure_memcg(gfp, memcg, tree, scanned, reclaimed);
+}
 
 /**
  * vmpressure_prio() - Account memory pressure through reclaimer priority level