Revert "ecryptfs: modify write path to encrypt page in writepage"

fs/ecryptfs/super.c

Index: fs/ecryptfs/super.c
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index 9bcba4b80e8028f1ca5d34fb4091a65168ca8c6b..1a037f77aa52c1a0abcccfcfd24dcb9cceb63bff 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -55,6 +55,7 @@ static struct inode *ecryptfs_alloc_inode(struct super_block *sb)
 	if (unlikely(!inode_info))
 		goto out;
 	ecryptfs_init_crypt_stat(&inode_info->crypt_stat);
+	mutex_init(&inode_info->lower_file_mutex);
 	inode_info->lower_file = NULL;
 	inode = &inode_info->vfs_inode;
 out:
@@ -199,7 +200,7 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt)
 const struct super_operations ecryptfs_sops = {
 	.alloc_inode = ecryptfs_alloc_inode,
 	.destroy_inode = ecryptfs_destroy_inode,
-	.drop_inode = generic_drop_inode,
+	.drop_inode = generic_delete_inode,
 	.put_super = ecryptfs_put_super,
 	.statfs = ecryptfs_statfs,
 	.remount_fs = NULL,