kernel: fix a reference counting bug in overlayfs

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37014 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic/patches-3.10/101-overlayfs_path_ref.patch

+--- a/fs/overlayfs/super.c
++++ b/fs/overlayfs/super.c
+@@ -385,7 +385,6 @@ struct dentry *ovl_lookup(struct inode *
+ 
+ struct file *ovl_path_open(struct path *path, int flags)
+ {
+-	path_get(path);
+ 	return dentry_open(path, flags, current_cred());
+ }
+ 

target/linux/generic/patches-3.8/101-overlayfs_path_ref.patch

+--- a/fs/overlayfs/super.c
++++ b/fs/overlayfs/super.c
+@@ -385,7 +385,6 @@ struct dentry *ovl_lookup(struct inode *
+ 
+ struct file *ovl_path_open(struct path *path, int flags)
+ {
+-	path_get(path);
+ 	return dentry_open(path, flags, current_cred());
+ }
+ 

target/linux/generic/patches-3.9/101-overlayfs_path_ref.patch

+--- a/fs/overlayfs/super.c
++++ b/fs/overlayfs/super.c
+@@ -385,7 +385,6 @@ struct dentry *ovl_lookup(struct inode *
+ 
+ struct file *ovl_path_open(struct path *path, int flags)
+ {
+-	path_get(path);
+ 	return dentry_open(path, flags, current_cred());
+ }
+