From 3dba3c0c883e28d96f778c3208e638f56679a554 Mon Sep 17 00:00:00 2001
From: freexperia <jerpelea@gmail.com>
Date: Wed, 11 Jul 2012 09:33:09 +0300
Subject: [PATCH] msm7x30: swap patch

---
 include/linux/blkdev.h | 1 +
 mm/swapfile.c          | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 912b8ff3..1ac81718 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1274,6 +1274,7 @@ struct block_device_operations {
 						unsigned long long);
 	int (*revalidate_disk) (struct gendisk *);
 	int (*getgeo)(struct block_device *, struct hd_geometry *);
+	void (*swap_slot_free_notify) (struct block_device *, unsigned long);
 	struct module *owner;
 };
 
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9c590eef..2c82f906 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -577,6 +577,7 @@ static int swap_entry_free(struct swap_info_struct *p,
 	count = p->swap_map[offset];
 	/* free if no reference */
 	if (!count) {
+		struct gendisk *disk = p->bdev->bd_disk;
 		if (offset < p->lowest_bit)
 			p->lowest_bit = offset;
 		if (offset > p->highest_bit)
@@ -585,6 +586,9 @@ static int swap_entry_free(struct swap_info_struct *p,
 			swap_list.next = p - swap_info;
 		nr_swap_pages++;
 		p->inuse_pages--;
+		if (disk->fops->swap_slot_free_notify)
+				disk->fops->swap_slot_free_notify(p->bdev,
+								offset);
 	}
 	if (!swap_count(count))
 		mem_cgroup_uncharge_swap(ent);