[PATCH 07/18] f2fs crypto: add f2fs encryption facilities

Most of parts were copied from ext4, except: - add f2fs_restore_and_release_control_page which returns control page and restore control page - remove ext4_encrypted_zeroout() - remove sbi->s_file_encryption_mode & sbi->s_dir_encryption_mode - add f2fs_end_io_crypto_work for mpage_end_io -

[PATCH 07/18] f2fs crypto: add f2fs encryption facilities

Most of parts were copied from ext4, except: - add f2fs_restore_and_release_control_page which returns control page and restore control page - remove ext4_encrypted_zeroout() - remove sbi-s_file_encryption_mode sbi-s_dir_encryption_mode - add f2fs_end_io_crypto_work for mpage_end_io -