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+====================
+The Linux Kernel API
+====================
+
+Data Types
+==========
+
+Doubly Linked Lists
+-------------------
+
+.. kernel-doc:: include/linux/list.h
+   :internal:
+
+Basic C Library Functions
+=========================
+
+When writing drivers, you cannot in general use routines which are from
+the C Library. Some of the functions have been found generally useful
+and they are listed below. The behaviour of these functions may vary
+slightly from those defined by ANSI, and these deviations are noted in
+the text.
+
+String Conversions
+------------------
+
+.. kernel-doc:: lib/vsprintf.c
+   :export:
+
+.. kernel-doc:: include/linux/kernel.h
+   :functions: kstrtol
+
+.. kernel-doc:: include/linux/kernel.h
+   :functions: kstrtoul
+
+.. kernel-doc:: lib/kstrtox.c
+   :export:
+
+String Manipulation
+-------------------
+
+.. kernel-doc:: lib/string.c
+   :export:
+
+Bit Operations
+--------------
+
+.. kernel-doc:: arch/x86/include/asm/bitops.h
+   :internal:
+
+Basic Kernel Library Functions
+==============================
+
+The Linux kernel provides more basic utility functions.
+
+Bitmap Operations
+-----------------
+
+.. kernel-doc:: lib/bitmap.c
+   :export:
+
+.. kernel-doc:: lib/bitmap.c
+   :internal:
+
+Command-line Parsing
+--------------------
+
+.. kernel-doc:: lib/cmdline.c
+   :export:
+
+CRC Functions
+-------------
+
+.. kernel-doc:: lib/crc7.c
+   :export:
+
+.. kernel-doc:: lib/crc16.c
+   :export:
+
+.. kernel-doc:: lib/crc-itu-t.c
+   :export:
+
+.. kernel-doc:: lib/crc32.c
+
+.. kernel-doc:: lib/crc-ccitt.c
+   :export:
+
+idr/ida Functions
+-----------------
+
+.. kernel-doc:: include/linux/idr.h
+   :doc: idr sync
+
+.. kernel-doc:: lib/idr.c
+   :doc: IDA description
+
+.. kernel-doc:: lib/idr.c
+   :export:
+
+Memory Management in Linux
+==========================
+
+The Slab Cache
+--------------
+
+.. kernel-doc:: include/linux/slab.h
+   :internal:
+
+.. kernel-doc:: mm/slab.c
+   :export:
+
+.. kernel-doc:: mm/util.c
+   :export:
+
+User Space Memory Access
+------------------------
+
+.. kernel-doc:: arch/x86/include/asm/uaccess_32.h
+   :internal:
+
+.. kernel-doc:: arch/x86/lib/usercopy_32.c
+   :export:
+
+More Memory Management Functions
+--------------------------------
+
+.. kernel-doc:: mm/readahead.c
+   :export:
+
+.. kernel-doc:: mm/filemap.c
+   :export:
+
+.. kernel-doc:: mm/memory.c
+   :export:
+
+.. kernel-doc:: mm/vmalloc.c
+   :export:
+
+.. kernel-doc:: mm/page_alloc.c
+   :internal:
+
+.. kernel-doc:: mm/mempool.c
+   :export:
+
+.. kernel-doc:: mm/dmapool.c
+   :export:
+
+.. kernel-doc:: mm/page-writeback.c
+   :export:
+
+.. kernel-doc:: mm/truncate.c
+   :export:
+
+Kernel IPC facilities
+=====================
+
+IPC utilities
+-------------
+
+.. kernel-doc:: ipc/util.c
+   :internal:
+
+FIFO Buffer
+===========
+
+kfifo interface
+---------------
+
+.. kernel-doc:: include/linux/kfifo.h
+   :internal:
+
+relay interface support
+=======================
+
+Relay interface support is designed to provide an efficient mechanism
+for tools and facilities to relay large amounts of data from kernel
+space to user space.
+
+relay interface
+---------------
+
+.. kernel-doc:: kernel/relay.c
+   :export:
+
+.. kernel-doc:: kernel/relay.c
+   :internal:
+
+Module Support
+==============
+
+Module Loading
+--------------
+
+.. kernel-doc:: kernel/kmod.c
+   :export:
+
+Inter Module support
+--------------------
+
+Refer to the file kernel/module.c for more information.
+
+Hardware Interfaces
+===================
+
+Interrupt Handling
+------------------
+
+.. kernel-doc:: kernel/irq/manage.c
+   :export:
+
+DMA Channels
+------------
+
+.. kernel-doc:: kernel/dma.c
+   :export:
+
+Resources Management
+--------------------
+
+.. kernel-doc:: kernel/resource.c
+   :internal:
+
+.. kernel-doc:: kernel/resource.c
+   :export:
+
+MTRR Handling
+-------------
+
+.. kernel-doc:: arch/x86/kernel/cpu/mtrr/main.c
+   :export:
+
+Security Framework
+==================
+
+.. kernel-doc:: security/security.c
+   :internal:
+
+.. kernel-doc:: security/inode.c
+   :export:
+
+Audit Interfaces
+================
+
+.. kernel-doc:: kernel/audit.c
+   :export:
+
+.. kernel-doc:: kernel/auditsc.c
+   :internal:
+
+.. kernel-doc:: kernel/auditfilter.c
+   :internal:
+
+Accounting Framework
+====================
+
+.. kernel-doc:: kernel/acct.c
+   :internal:
+
+Block Devices
+=============
+
+.. kernel-doc:: block/blk-core.c
+   :export:
+
+.. kernel-doc:: block/blk-core.c
+   :internal:
+
+.. kernel-doc:: block/blk-map.c
+   :export:
+
+.. kernel-doc:: block/blk-sysfs.c
+   :internal:
+
+.. kernel-doc:: block/blk-settings.c
+   :export:
+
+.. kernel-doc:: block/blk-exec.c
+   :export:
+
+.. kernel-doc:: block/blk-flush.c
+   :export:
+
+.. kernel-doc:: block/blk-lib.c
+   :export:
+
+.. kernel-doc:: block/blk-tag.c
+   :export:
+
+.. kernel-doc:: block/blk-tag.c
+   :internal:
+
+.. kernel-doc:: block/blk-integrity.c
+   :export:
+
+.. kernel-doc:: kernel/trace/blktrace.c
+   :internal:
+
+.. kernel-doc:: block/genhd.c
+   :internal:
+
+.. kernel-doc:: block/genhd.c
+   :export:
+
+Char devices
+============
+
+.. kernel-doc:: fs/char_dev.c
+   :export:
+
+Clock Framework
+===============
+
+The clock framework defines programming interfaces to support software
+management of the system clock tree. This framework is widely used with
+System-On-Chip (SOC) platforms to support power management and various
+devices which may need custom clock rates. Note that these "clocks"
+don't relate to timekeeping or real time clocks (RTCs), each of which
+have separate frameworks. These :c:type:`struct clk <clk>`
+instances may be used to manage for example a 96 MHz signal that is used
+to shift bits into and out of peripherals or busses, or otherwise
+trigger synchronous state machine transitions in system hardware.
+
+Power management is supported by explicit software clock gating: unused
+clocks are disabled, so the system doesn't waste power changing the
+state of transistors that aren't in active use. On some systems this may
+be backed by hardware clock gating, where clocks are gated without being
+disabled in software. Sections of chips that are powered but not clocked
+may be able to retain their last state. This low power state is often
+called a *retention mode*. This mode still incurs leakage currents,
+especially with finer circuit geometries, but for CMOS circuits power is
+mostly used by clocked state changes.
+
+Power-aware drivers only enable their clocks when the device they manage
+is in active use. Also, system sleep states often differ according to
+which clock domains are active: while a "standby" state may allow wakeup
+from several active domains, a "mem" (suspend-to-RAM) state may require
+a more wholesale shutdown of clocks derived from higher speed PLLs and
+oscillators, limiting the number of possible wakeup event sources. A
+driver's suspend method may need to be aware of system-specific clock
+constraints on the target sleep state.
+
+Some platforms support programmable clock generators. These can be used
+by external chips of various kinds, such as other CPUs, multimedia
+codecs, and devices with strict requirements for interface clocking.
+
+.. kernel-doc:: include/linux/clk.h
+   :internal: