diff --git a/mm/swapfile.c b/mm/swapfile.c
index 8a6cdf9e55f97bf6815789844722fe6bd56256a3..811d90e1c929a84db6a2ca352028c8c1cae16138 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -37,6 +37,7 @@
 #include <linux/swapfile.h>
 #include <linux/export.h>
 #include <linux/swap_slots.h>
+#include <linux/sort.h>
 
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
@@ -1198,6 +1199,13 @@ void put_swap_page(struct page *page, swp_entry_t entry)
 		swapcache_free_cluster(entry);
 }
 
+static int swp_entry_cmp(const void *ent1, const void *ent2)
+{
+	const swp_entry_t *e1 = ent1, *e2 = ent2;
+
+	return (int)swp_type(*e1) - (int)swp_type(*e2);
+}
+
 void swapcache_free_entries(swp_entry_t *entries, int n)
 {
 	struct swap_info_struct *p, *prev;
@@ -1208,6 +1216,14 @@ void swapcache_free_entries(swp_entry_t *entries, int n)
 
 	prev = NULL;
 	p = NULL;
+
+	/*
+	 * Sort swap entries by swap device, so each lock is only taken once.
+	 * nr_swapfiles isn't absolutely correct, but the overhead of sort() is
+	 * so low that it isn't necessary to optimize further.
+	 */
+	if (nr_swapfiles > 1)
+		sort(entries, n, sizeof(entries[0]), swp_entry_cmp, NULL);
 	for (i = 0; i < n; ++i) {
 		p = swap_info_get_cont(entries[i], prev);
 		if (p)