The mount id is always same when mount several partition
        ps -ef:
        root       927     2  0 Jan01 ?        00:00:00 [yaffs-bg-1]
        root      1310     2  0 19:17 ?        00:00:00 [yaffs-bg-1]

This patch find mount id which not used
        ps -ef:
        root 1234 2 0 23:45 ? 00:00:00 [yaffs-bg-0]
        root 1236 2 0 23:45 ? 00:00:00 [yaffs-bg-1]

Signed-off-by: chenjie <chenjie6@huawei.com>
---
 yaffs_vfs_multi.c  |   37 ++++++++++++++++++++++++++-----------
 yaffs_vfs_single.c |   39 +++++++++++++++++++++++++++++----------
 2 files changed, 55 insertions(+), 21 deletions(-)

diff --git a/yaffs_vfs_multi.c b/yaffs_vfs_multi.c
index f767315..fb7394a 100644
--- a/yaffs_vfs_multi.c
+++ b/yaffs_vfs_multi.c
@@ -2591,8 +2591,33 @@ static struct dentry *yaffs_make_root(struct inode *inode)
 #endif
 }
 
+static unsigned yaffs_find_mount_id(void) {
+	unsigned mount_id = 0;
+	int found = 0;
+	struct yaffs_linux_context *context_iterator;
+	struct list_head *l;
 
+	if (list_empty(&yaffs_context_list)) {
+		return mount_id;
+	}
 
+	for (mount_id=0; mount_id < 0xffffffff; mount_id++) {
+		found = 0;
+		list_for_each(l, &yaffs_context_list) {
+			context_iterator =
+				list_entry(l, struct yaffs_linux_context,
+				context_list);
+			if (context_iterator->mount_id == mount_id) {
+				found = 1;
+				break;
+			}
+		}
+		if (!found)
+			return mount_id;
+	}
+	
+	return mount_id;
+}
 
 static struct super_block *yaffs_internal_read_super(int yaffs_version,
 						     struct super_block *sb,
@@ -2812,17 +2837,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	mutex_lock(&yaffs_context_lock);
 	/* Get a mount id */
-	found = 0;
-	for (mount_id = 0; !found; mount_id++) {
-		found = 1;
-		list_for_each(l, &yaffs_context_list) {
-			context_iterator =
-			    list_entry(l, struct yaffs_linux_context,
-				       context_list);
-			if (context_iterator->mount_id == mount_id)
-				found = 0;
-		}
-	}
+	mount_id = yaffs_find_mount_id();
 	context->mount_id = mount_id;
 
 	list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
diff --git a/yaffs_vfs_single.c b/yaffs_vfs_single.c
index 232dc26..3f439fd 100644
--- a/yaffs_vfs_single.c
+++ b/yaffs_vfs_single.c
@@ -1960,6 +1960,34 @@ static const struct super_operations yaffs_super_ops = {
 	.write_super = yaffs_write_super,
 };
 
+static unsigned yaffs_find_mount_id(void) {
+        unsigned mount_id = 0;
+        int found = 0;
+        struct yaffs_linux_context *context_iterator;
+        struct list_head *l;
+
+        if (list_empty(&yaffs_context_list)) {
+                return mount_id;
+        }
+
+        for (mount_id=0; mount_id < 0xffffffff; mount_id++) {
+                found = 0;
+                list_for_each(l, &yaffs_context_list) {
+                        context_iterator =
+                                list_entry(l, struct yaffs_linux_context,
+                                context_list);
+                        if (context_iterator->mount_id == mount_id) {
+                                found = 1;
+                                break;
+                        }
+                }
+                if (!found)
+                        return mount_id;
+        }
+
+        return mount_id;
+}
+
 static struct super_block *yaffs_internal_read_super(int yaffs_version,
 						     struct super_block *sb,
 						     void *data, int silent)
@@ -2221,16 +2249,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
 
 	mutex_lock(&yaffs_context_lock);
 	/* Get a mount id */
-	for (mount_id = 0, found = 0; !found; mount_id++) {
-		found = 1;
-		list_for_each(l, &yaffs_context_list) {
-			context_iterator =
-				list_entry(l, struct yaffs_linux_context,
-					context_list);
-			if (context_iterator->mount_id == mount_id)
-				found = 0;
-		}
-	}
+	mount_id = yaffs_find_mount_id();
 	context->mount_id = mount_id;
 
 	list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
-- 
1.6.0.2