ecryptfs_i_size_init
ecryptfs_i_size_init(page_virt, d_inode(ecryptfs_dentry));
ecryptfs_i_size_init(file_size, inode);
ecryptfs_i_size_init(file_size, inode);
void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);