[PATCH 3/3] docs/zh_TW: link filesystems/ and cpu-freq/ from the index

[Chen-Yu Yeh <chenyou910331@gmail.com>]

filesystems/ and cpu-freq/ each have an index.rst, but nothing links to
either, so their translations cannot be reached from the rest of the
zh_TW documentation.  As agreed in the zh_TW scope discussion, link them
rather than drop them.

The English documentation reaches both through subsystem-apis.rst,
which the zh_TW index lists only as a TODO item.  Translate
subsystem-apis.rst, with the two translated areas in its toctrees and
the rest under TODOList as zh_CN does, and link it from the index.
"Core subsystems" is rendered as 基礎子系統 rather than
核心子系統, which would read the same as the page title
now that "kernel" is 核心.

Like the pages it links to, the new page carries the notice for
translations not kept in sync.

update to commit 4f10f1dfb235 ("net: remove ISDN subsystem and Bluetooth
CMTP")

Link: https://lore.kernel.org/linux-doc/CAKspUhJAbCWoxgh2eq8R5g_MiNK=oXgKPUWqGOpHh0w1-Fv74A@mail.gmail.com/
Link: https://lore.kernel.org/linux-doc/ap5xEtMdwXS8Pvcf@wyuan.org/
Signed-off-by: Chen-Yu Yeh <chenyou910331@gmail.com>
---
 Documentation/translations/zh_TW/index.rst    |  6 +-
 .../translations/zh_TW/subsystem-apis.rst     | 99 +++++++++++++++++++
 2 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/translations/zh_TW/subsystem-apis.rst

diff --git a/Documentation/translations/zh_TW/index.rst b/Documentation/translations/zh_TW/index.rst
index 1dddf5963864..001680d040ea 100644
--- a/Documentation/translations/zh_TW/index.rst
+++ b/Documentation/translations/zh_TW/index.rst
@@ -39,12 +39,16 @@ TODOList:
 
 開發人員使用的內核內部交互接口手冊。
 
+.. toctree::
+   :maxdepth: 1
+
+   subsystem-apis
+
 TODOList:
 
 * core-api/index
 * driver-api/index
 * 內核中的鎖 <locking/index>
-* subsystem-apis
 
 開發工具和流程
 --------------
diff --git a/Documentation/translations/zh_TW/subsystem-apis.rst b/Documentation/translations/zh_TW/subsystem-apis.rst
new file mode 100644
index 000000000000..5c874aafe70c
--- /dev/null
+++ b/Documentation/translations/zh_TW/subsystem-apis.rst
@@ -0,0 +1,99 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ./disclaimer-zh_TW.rst
+.. include:: ./unmaintained-zh_TW.rst
+
+:Original: Documentation/subsystem-apis.rst
+
+==============
+核心子系統文件
+==============
+
+這些書從核心開發者的角度，深入介紹特定核心子系統如何運作。這裡的大部分
+資訊直接取自核心原始碼，並視需要加上補充材料（或者至少是我們設法加上的
+部分——很可能 *並非* 所有需要的材料都已具備）。
+
+基礎子系統
+----------
+
+TODOList:
+
+* core-api/index
+* driver-api/index
+* mm/index
+* power/index
+* scheduler/index
+* timers/index
+* locking/index
+
+人機介面
+--------
+
+TODOList:
+
+* input/index
+* hid/index
+* sound/index
+* gpu/index
+* fb/index
+* leds/index
+
+網路介面
+--------
+
+TODOList:
+
+* networking/index
+* netlabel/index
+* infiniband/index
+* mhi/index
+
+儲存介面
+--------
+
+.. toctree::
+   :maxdepth: 1
+
+   filesystems/index
+
+TODOList:
+
+* block/index
+* cdrom/index
+* scsi/index
+* target/index
+* nvme/index
+
+其他子系統
+----------
+
+**Fixme**：這裡還需要更多的分類整理工作。
+
+.. toctree::
+   :maxdepth: 1
+
+   cpu-freq/index
+
+TODOList:
+
+* accounting/index
+* edac/index
+* fpga/index
+* i2c/index
+* iio/index
+* pcmcia/index
+* spi/index
+* w1/index
+* watchdog/index
+* virt/index
+* hwmon/index
+* accel/index
+* security/index
+* crypto/index
+* bpf/index
+* usb/index
+* PCI/index
+* misc-devices/index
+* peci/index
+* wmi/index
+* tee/index
-- 
2.43.0