mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 17:24:17 +08:00
7832681b36
- The old driver statement has been added to the kernel docs.
- We have a couple of new helper scripts. find-unused-docs.sh from Sayli
Karnic will point out kerneldoc comments that are not actually used in
the documentation. Jani Nikula's documentation-file-ref-check finds
references to non-existing files.
- A new ftrace document from Steve Rostedt.
- Vinod Koul converted the dmaengine docs to RST
Beyond that, it's mostly simple fixes.
-----BEGIN PGP SIGNATURE-----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=H6ud
-----END PGP SIGNATURE-----
Merge tag 'docs-4.15' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"A relatively calm cycle for the docs tree again.
- The old driver statement has been added to the kernel docs.
- We have a couple of new helper scripts. find-unused-docs.sh from
Sayli Karnic will point out kerneldoc comments that are not actually
used in the documentation. Jani Nikula's
documentation-file-ref-check finds references to non-existing files.
- A new ftrace document from Steve Rostedt.
- Vinod Koul converted the dmaengine docs to RST
Beyond that, it's mostly simple fixes.
This set reaches outside of Documentation/ a bit more than most. In
all cases, the changes are to comment docs, mostly from Randy, in
places where there didn't seem to be anybody better to take them"
* tag 'docs-4.15' of git://git.lwn.net/linux: (52 commits)
documentation: fb: update list of available compiled-in fonts
MAINTAINERS: update DMAengine documentation location
dmaengine: doc: ReSTize pxa_dma doc
dmaengine: doc: ReSTize dmatest doc
dmaengine: doc: ReSTize client API doc
dmaengine: doc: ReSTize provider doc
dmaengine: doc: Add ReST style dmaengine document
ftrace/docs: Add documentation on how to use ftrace from within the kernel
bug-hunting.rst: Fix an example and a typo in a Sphinx tag
scripts: Add a script to find unused documentation
samples: Convert timers to use timer_setup()
documentation: kernel-api: add more info on bitmap functions
Documentation: fix selftests related file refs
Documentation: fix ref to power basic-pm-debugging
Documentation: fix ref to trace stm content
Documentation: fix ref to coccinelle content
Documentation: fix ref to workqueue content
Documentation: fix ref to sphinx/kerneldoc.py
Documentation: fix locking rt-mutex doc refs
docs: dev-tools: correct Coccinelle version number
...
425 lines
8.3 KiB
ReStructuredText
425 lines
8.3 KiB
ReStructuredText
====================
|
|
The Linux Kernel API
|
|
====================
|
|
|
|
|
|
List Management Functions
|
|
=========================
|
|
|
|
.. 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
|
|
:doc: bitmap introduction
|
|
|
|
.. kernel-doc:: include/linux/bitmap.h
|
|
:doc: declare bitmap
|
|
|
|
.. kernel-doc:: include/linux/bitmap.h
|
|
:doc: bitmap overview
|
|
|
|
.. kernel-doc:: include/linux/bitmap.h
|
|
:doc: bitmap bitops
|
|
|
|
.. kernel-doc:: lib/bitmap.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/bitmap.c
|
|
:internal:
|
|
|
|
.. kernel-doc:: include/linux/bitmap.h
|
|
:internal:
|
|
|
|
Command-line Parsing
|
|
--------------------
|
|
|
|
.. kernel-doc:: lib/cmdline.c
|
|
:export:
|
|
|
|
CRC Functions
|
|
-------------
|
|
|
|
.. kernel-doc:: lib/crc4.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/crc7.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/crc8.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/crc16.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/crc32.c
|
|
|
|
.. kernel-doc:: lib/crc-ccitt.c
|
|
:export:
|
|
|
|
.. kernel-doc:: lib/crc-itu-t.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:
|
|
|
|
Math Functions in Linux
|
|
=======================
|
|
|
|
Base 2 log and power Functions
|
|
------------------------------
|
|
|
|
.. kernel-doc:: include/linux/log2.h
|
|
:internal:
|
|
|
|
Division Functions
|
|
------------------
|
|
|
|
.. kernel-doc:: include/asm-generic/div64.h
|
|
:functions: do_div
|
|
|
|
.. kernel-doc:: include/linux/math64.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: lib/div64.c
|
|
:functions: div_s64_rem div64_u64_rem div64_u64 div64_s64
|
|
|
|
.. kernel-doc:: lib/gcd.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.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:
|
|
|
|
Synchronization Primitives
|
|
==========================
|
|
|
|
Read-Copy Update (RCU)
|
|
----------------------
|
|
|
|
.. kernel-doc:: include/linux/rcupdate.h
|
|
|
|
.. kernel-doc:: include/linux/rcupdate_wait.h
|
|
|
|
.. kernel-doc:: include/linux/rcutree.h
|
|
|
|
.. kernel-doc:: kernel/rcu/tree.c
|
|
|
|
.. kernel-doc:: kernel/rcu/tree_plugin.h
|
|
|
|
.. kernel-doc:: kernel/rcu/tree_exp.h
|
|
|
|
.. kernel-doc:: kernel/rcu/update.c
|
|
|
|
.. kernel-doc:: include/linux/srcu.h
|
|
|
|
.. kernel-doc:: kernel/rcu/srcutree.c
|
|
|
|
.. kernel-doc:: include/linux/rculist_bl.h
|
|
|
|
.. kernel-doc:: include/linux/rculist.h
|
|
|
|
.. kernel-doc:: include/linux/rculist_nulls.h
|
|
|
|
.. kernel-doc:: include/linux/rcu_sync.h
|
|
|
|
.. kernel-doc:: kernel/rcu/sync.c
|
|
|