tools: cpupower: fix return checks for sysfs_get_idlestate_count()
[deliverable/linux.git] / Documentation / 00-INDEX
1
2 This is a brief list of all the files in ./linux/Documentation and what
3 they contain. If you add a documentation file, please list it here in
4 alphabetical order as well, or risk being hunted down like a rabid dog.
5 Please keep the descriptions small enough to fit on one line.
6 Thanks -- Paul G.
7
8 Following translations are available on the WWW:
9
10 - Japanese, maintained by the JF Project (jf@listserv.linux.or.jp), at
11 http://linuxjf.sourceforge.jp/
12
13 00-INDEX
14 - this file.
15 ABI/
16 - info on kernel <-> userspace ABI and relative interface stability.
17
18 BUG-HUNTING
19 - brute force method of doing binary search of patches to find bug.
20 Changes
21 - list of changes that break older software packages.
22 CodingStyle
23 - how the maintainers expect the C code in the kernel to look.
24 DMA-API.txt
25 - DMA API, pci_ API & extensions for non-consistent memory machines.
26 DMA-API-HOWTO.txt
27 - Dynamic DMA mapping Guide
28 DMA-ISA-LPC.txt
29 - How to do DMA with ISA (and LPC) devices.
30 DMA-attributes.txt
31 - listing of the various possible attributes a DMA region can have
32 dmatest.txt
33 - how to compile, configure and use the dmatest system.
34 DocBook/
35 - directory with DocBook templates etc. for kernel documentation.
36 EDID/
37 - directory with info on customizing EDID for broken gfx/displays.
38 HOWTO
39 - the process and procedures of how to do Linux kernel development.
40 IPMI.txt
41 - info on Linux Intelligent Platform Management Interface (IPMI) Driver.
42 IRQ-affinity.txt
43 - how to select which CPU(s) handle which interrupt events on SMP.
44 IRQ-domain.txt
45 - info on interrupt numbering and setting up IRQ domains.
46 IRQ.txt
47 - description of what an IRQ is.
48 Intel-IOMMU.txt
49 - basic info on the Intel IOMMU virtualization support.
50 Makefile
51 - some files in Documentation dir are actually sample code to build
52 ManagementStyle
53 - how to (attempt to) manage kernel hackers.
54 RCU/
55 - directory with info on RCU (read-copy update).
56 SAK.txt
57 - info on Secure Attention Keys.
58 SM501.txt
59 - Silicon Motion SM501 multimedia companion chip
60 SecurityBugs
61 - procedure for reporting security bugs found in the kernel.
62 SubmitChecklist
63 - Linux kernel patch submission checklist.
64 SubmittingDrivers
65 - procedure to get a new driver source included into the kernel tree.
66 SubmittingPatches
67 - procedure to get a source patch included into the kernel tree.
68 VGA-softcursor.txt
69 - how to change your VGA cursor from a blinking underscore.
70 accounting/
71 - documentation on accounting and taskstats.
72 acpi/
73 - info on ACPI-specific hooks in the kernel.
74 aoe/
75 - description of AoE (ATA over Ethernet) along with config examples.
76 applying-patches.txt
77 - description of various trees and how to apply their patches.
78 arm/
79 - directory with info about Linux on the ARM architecture.
80 arm64/
81 - directory with info about Linux on the 64 bit ARM architecture.
82 assoc_array.txt
83 - generic associative array intro.
84 atomic_ops.txt
85 - semantics and behavior of atomic and bitmask operations.
86 auxdisplay/
87 - misc. LCD driver documentation (cfag12864b, ks0108).
88 backlight/
89 - directory with info on controlling backlights in flat panel displays
90 bad_memory.txt
91 - how to use kernel parameters to exclude bad RAM regions.
92 basic_profiling.txt
93 - basic instructions for those who wants to profile Linux kernel.
94 bcache.txt
95 - Block-layer cache on fast SSDs to improve slow (raid) I/O performance.
96 binfmt_misc.txt
97 - info on the kernel support for extra binary formats.
98 blackfin/
99 - directory with documentation for the Blackfin arch.
100 block/
101 - info on the Block I/O (BIO) layer.
102 blockdev/
103 - info on block devices & drivers
104 braille-console.txt
105 - info on how to use serial devices for Braille support.
106 bt8xxgpio.txt
107 - info on how to modify a bt8xx video card for GPIO usage.
108 btmrvl.txt
109 - info on Marvell Bluetooth driver usage.
110 bus-devices/
111 - directory with info on TI GPMC (General Purpose Memory Controller)
112 bus-virt-phys-mapping.txt
113 - how to access I/O mapped memory from within device drivers.
114 cachetlb.txt
115 - describes the cache/TLB flushing interfaces Linux uses.
116 cdrom/
117 - directory with information on the CD-ROM drivers that Linux has.
118 cgroups/
119 - cgroups features, including cpusets and memory controller.
120 circular-buffers.txt
121 - how to make use of the existing circular buffer infrastructure
122 clk.txt
123 - info on the common clock framework
124 coccinelle.txt
125 - info on how to get and use the Coccinelle code checking tool.
126 connector/
127 - docs on the netlink based userspace<->kernel space communication mod.
128 console/
129 - documentation on Linux console drivers.
130 cpu-freq/
131 - info on CPU frequency and voltage scaling.
132 cpu-hotplug.txt
133 - document describing CPU hotplug support in the Linux kernel.
134 cpu-load.txt
135 - document describing how CPU load statistics are collected.
136 cpuidle/
137 - info on CPU_IDLE, CPU idle state management subsystem.
138 cputopology.txt
139 - documentation on how CPU topology info is exported via sysfs.
140 crc32.txt
141 - brief tutorial on CRC computation
142 cris/
143 - directory with info about Linux on CRIS architecture.
144 crypto/
145 - directory with info on the Crypto API.
146 dcdbas.txt
147 - information on the Dell Systems Management Base Driver.
148 debugging-modules.txt
149 - some notes on debugging modules after Linux 2.6.3.
150 debugging-via-ohci1394.txt
151 - how to use firewire like a hardware debugger memory reader.
152 dell_rbu.txt
153 - document demonstrating the use of the Dell Remote BIOS Update driver.
154 development-process/
155 - how to work with the mainline kernel development process.
156 device-mapper/
157 - directory with info on Device Mapper.
158 devices.txt
159 - plain ASCII listing of all the nodes in /dev/ with major minor #'s.
160 devicetree/
161 - directory with info on device tree files used by OF/PowerPC/ARM
162 digsig.txt
163 -info on the Digital Signature Verification API
164 dma-buf-sharing.txt
165 - the DMA Buffer Sharing API Guide
166 dmaengine.txt
167 -the DMA Engine API Guide
168 dontdiff
169 - file containing a list of files that should never be diff'ed.
170 driver-model/
171 - directory with info about Linux driver model.
172 dvb/
173 - info on Linux Digital Video Broadcast (DVB) subsystem.
174 dynamic-debug-howto.txt
175 - how to use the dynamic debug (dyndbg) feature.
176 early-userspace/
177 - info about initramfs, klibc, and userspace early during boot.
178 edac.txt
179 - information on EDAC - Error Detection And Correction
180 efi-stub.txt
181 - How to use the EFI boot stub to bypass GRUB or elilo on EFI systems.
182 eisa.txt
183 - info on EISA bus support.
184 email-clients.txt
185 - info on how to use e-mail to send un-mangled (git) patches.
186 extcon/
187 - directory with porting guide for Android kernel switch driver.
188 fault-injection/
189 - dir with docs about the fault injection capabilities infrastructure.
190 fb/
191 - directory with info on the frame buffer graphics abstraction layer.
192 filesystems/
193 - info on the vfs and the various filesystems that Linux supports.
194 firmware_class/
195 - request_firmware() hotplug interface info.
196 flexible-arrays.txt
197 - how to make use of flexible sized arrays in linux
198 fmc/
199 - information about the FMC bus abstraction
200 frv/
201 - Fujitsu FR-V Linux documentation.
202 futex-requeue-pi.txt
203 - info on requeueing of tasks from a non-PI futex to a PI futex
204 gcov.txt
205 - use of GCC's coverage testing tool "gcov" with the Linux kernel
206 gpio/
207 - gpio related documentation
208 hid/
209 - directory with information on human interface devices
210 highuid.txt
211 - notes on the change from 16 bit to 32 bit user/group IDs.
212 hwspinlock.txt
213 - hardware spinlock provides hardware assistance for synchronization
214 timers/
215 - info on the timer related topics
216 hw_random.txt
217 - info on Linux support for random number generator in i8xx chipsets.
218 hwmon/
219 - directory with docs on various hardware monitoring drivers.
220 i2c/
221 - directory with info about the I2C bus/protocol (2 wire, kHz speed).
222 i2o/
223 - directory with info about the Linux I2O subsystem.
224 x86/i386/
225 - directory with info about Linux on Intel 32 bit architecture.
226 ia64/
227 - directory with info about Linux on Intel 64 bit architecture.
228 infiniband/
229 - directory with documents concerning Linux InfiniBand support.
230 init.txt
231 - what to do when the kernel can't find the 1st process to run.
232 initrd.txt
233 - how to use the RAM disk as an initial/temporary root filesystem.
234 input/
235 - info on Linux input device support.
236 intel_txt.txt
237 - info on intel Trusted Execution Technology (intel TXT).
238 io-mapping.txt
239 - description of io_mapping functions in linux/io-mapping.h
240 io_ordering.txt
241 - info on ordering I/O writes to memory-mapped addresses.
242 ioctl/
243 - directory with documents describing various IOCTL calls.
244 iostats.txt
245 - info on I/O statistics Linux kernel provides.
246 irqflags-tracing.txt
247 - how to use the irq-flags tracing feature.
248 isapnp.txt
249 - info on Linux ISA Plug & Play support.
250 isdn/
251 - directory with info on the Linux ISDN support, and supported cards.
252 java.txt
253 - info on the in-kernel binary support for Java(tm).
254 ja_JP/
255 - directory with Japanese translations of various documents
256 kbuild/
257 - directory with info about the kernel build process.
258 kdump/
259 - directory with mini HowTo on getting the crash dump code to work.
260 kernel-doc-nano-HOWTO.txt
261 - mini HowTo on generation and location of kernel documentation files.
262 kernel-docs.txt
263 - listing of various WWW + books that document kernel internals.
264 kernel-parameters.txt
265 - summary listing of command line / boot prompt args for the kernel.
266 kernel-per-CPU-kthreads.txt
267 - List of all per-CPU kthreads and how they introduce jitter.
268 kmemcheck.txt
269 - info on dynamic checker that detects uses of uninitialized memory.
270 kmemleak.txt
271 - info on how to make use of the kernel memory leak detection system
272 ko_KR/
273 - directory with Korean translations of various documents
274 kobject.txt
275 - info of the kobject infrastructure of the Linux kernel.
276 kprobes.txt
277 - documents the kernel probes debugging feature.
278 kref.txt
279 - docs on adding reference counters (krefs) to kernel objects.
280 laptops/
281 - directory with laptop related info and laptop driver documentation.
282 ldm.txt
283 - a brief description of LDM (Windows Dynamic Disks).
284 leds/
285 - directory with info about LED handling under Linux.
286 local_ops.txt
287 - semantics and behavior of local atomic operations.
288 lockdep-design.txt
289 - documentation on the runtime locking correctness validator.
290 locking/
291 - directory with info about kernel locking primitives
292 lockstat.txt
293 - info on collecting statistics on locks (and contention).
294 lockup-watchdogs.txt
295 - info on soft and hard lockup detectors (aka nmi_watchdog).
296 logo.gif
297 - full colour GIF image of Linux logo (penguin - Tux).
298 logo.txt
299 - info on creator of above logo & site to get additional images from.
300 m68k/
301 - directory with info about Linux on Motorola 68k architecture.
302 magic-number.txt
303 - list of magic numbers used to mark/protect kernel data structures.
304 md.txt
305 - info on boot arguments for the multiple devices driver.
306 media-framework.txt
307 - info on media framework, its data structures, functions and usage.
308 memory-barriers.txt
309 - info on Linux kernel memory barriers.
310 memory-devices/
311 - directory with info on parts like the Texas Instruments EMIF driver
312 memory-hotplug.txt
313 - Hotpluggable memory support, how to use and current status.
314 metag/
315 - directory with info about Linux on Meta architecture.
316 mips/
317 - directory with info about Linux on MIPS architecture.
318 misc-devices/
319 - directory with info about devices using the misc dev subsystem
320 mmc/
321 - directory with info about the MMC subsystem
322 mn10300/
323 - directory with info about the mn10300 architecture port
324 module-signing.txt
325 - Kernel module signing for increased security when loading modules.
326 mtd/
327 - directory with info about memory technology devices (flash)
328 mono.txt
329 - how to execute Mono-based .NET binaries with the help of BINFMT_MISC.
330 mutex-design.txt
331 - info on the generic mutex subsystem.
332 namespaces/
333 - directory with various information about namespaces
334 netlabel/
335 - directory with information on the NetLabel subsystem.
336 networking/
337 - directory with info on various aspects of networking with Linux.
338 nfc/
339 - directory relating info about Near Field Communications support.
340 nommu-mmap.txt
341 - documentation about no-mmu memory mapping support.
342 numastat.txt
343 - info on how to read Numa policy hit/miss statistics in sysfs.
344 oops-tracing.txt
345 - how to decode those nasty internal kernel error dump messages.
346 padata.txt
347 - An introduction to the "padata" parallel execution API
348 parisc/
349 - directory with info on using Linux on PA-RISC architecture.
350 parport.txt
351 - how to use the parallel-port driver.
352 parport-lowlevel.txt
353 - description and usage of the low level parallel port functions.
354 pcmcia/
355 - info on the Linux PCMCIA driver.
356 percpu-rw-semaphore.txt
357 - RCU based read-write semaphore optimized for locking for reading
358 phy.txt
359 - Description of the generic PHY framework.
360 pi-futex.txt
361 - documentation on lightweight priority inheritance futexes.
362 pinctrl.txt
363 - info on pinctrl subsystem and the PINMUX/PINCONF and drivers
364 pnp.txt
365 - Linux Plug and Play documentation.
366 power/
367 - directory with info on Linux PCI power management.
368 powerpc/
369 - directory with info on using Linux with the PowerPC.
370 prctl/
371 - directory with info on the priveledge control subsystem
372 preempt-locking.txt
373 - info on locking under a preemptive kernel.
374 printk-formats.txt
375 - how to get printk format specifiers right
376 pps/
377 - directory with information on the pulse-per-second support
378 ptp/
379 - directory with info on support for IEEE 1588 PTP clocks in Linux.
380 pwm.txt
381 - info on the pulse width modulation driver subsystem
382 ramoops.txt
383 - documentation of the ramoops oops/panic logging module.
384 rapidio/
385 - directory with info on RapidIO packet-based fabric interconnect
386 rbtree.txt
387 - info on what red-black trees are and what they are for.
388 remoteproc.txt
389 - info on how to handle remote processor (e.g. AMP) offloads/usage.
390 rfkill.txt
391 - info on the radio frequency kill switch subsystem/support.
392 robust-futex-ABI.txt
393 - documentation of the robust futex ABI.
394 robust-futexes.txt
395 - a description of what robust futexes are.
396 rpmsg.txt
397 - info on the Remote Processor Messaging (rpmsg) Framework
398 rt-mutex-design.txt
399 - description of the RealTime mutex implementation design.
400 rt-mutex.txt
401 - desc. of RT-mutex subsystem with PI (Priority Inheritance) support.
402 rtc.txt
403 - notes on how to use the Real Time Clock (aka CMOS clock) driver.
404 s390/
405 - directory with info on using Linux on the IBM S390.
406 scheduler/
407 - directory with info on the scheduler.
408 scsi/
409 - directory with info on Linux scsi support.
410 security/
411 - directory that contains security-related info
412 serial/
413 - directory with info on the low level serial API.
414 serial-console.txt
415 - how to set up Linux with a serial line console as the default.
416 sgi-ioc4.txt
417 - description of the SGI IOC4 PCI (multi function) device.
418 sh/
419 - directory with info on porting Linux to a new architecture.
420 smsc_ece1099.txt
421 -info on the smsc Keyboard Scan Expansion/GPIO Expansion device.
422 sound/
423 - directory with info on sound card support.
424 sparse.txt
425 - info on how to obtain and use the sparse tool for typechecking.
426 spi/
427 - overview of Linux kernel Serial Peripheral Interface (SPI) support.
428 spinlocks.txt
429 - info on using spinlocks to provide exclusive access in kernel.
430 stable_api_nonsense.txt
431 - info on why the kernel does not have a stable in-kernel api or abi.
432 stable_kernel_rules.txt
433 - rules and procedures for the -stable kernel releases.
434 static-keys.txt
435 - info on how static keys allow debug code in hotpaths via patching
436 svga.txt
437 - short guide on selecting video modes at boot via VGA BIOS.
438 sysfs-rules.txt
439 - How not to use sysfs.
440 sysctl/
441 - directory with info on the /proc/sys/* files.
442 sysrq.txt
443 - info on the magic SysRq key.
444 target/
445 - directory with info on generating TCM v4 fabric .ko modules
446 this_cpu_ops.txt
447 - List rationale behind and the way to use this_cpu operations.
448 thermal/
449 - directory with information on managing thermal issues (CPU/temp)
450 trace/
451 - directory with info on tracing technologies within linux
452 unaligned-memory-access.txt
453 - info on how to avoid arch breaking unaligned memory access in code.
454 unicode.txt
455 - info on the Unicode character/font mapping used in Linux.
456 unshare.txt
457 - description of the Linux unshare system call.
458 usb/
459 - directory with info regarding the Universal Serial Bus.
460 vDSO/
461 - directory with info regarding virtual dynamic shared objects
462 vfio.txt
463 - info on Virtual Function I/O used in guest/hypervisor instances.
464 vgaarbiter.txt
465 - info on enable/disable the legacy decoding on different VGA devices
466 video-output.txt
467 - sysfs class driver interface to enable/disable a video output device.
468 video4linux/
469 - directory with info regarding video/TV/radio cards and linux.
470 virtual/
471 - directory with information on the various linux virtualizations.
472 vm/
473 - directory with info on the Linux vm code.
474 vme_api.txt
475 - file relating info on the VME bus API in linux
476 volatile-considered-harmful.txt
477 - Why the "volatile" type class should not be used
478 w1/
479 - directory with documents regarding the 1-wire (w1) subsystem.
480 watchdog/
481 - how to auto-reboot Linux if it has "fallen and can't get up". ;-)
482 wimax/
483 - directory with info about Intel Wireless Wimax Connections
484 workqueue.txt
485 - information on the Concurrency Managed Workqueue implementation
486 ww-mutex-design.txt
487 - Intro to Mutex wait/would deadlock handling.s
488 x86/x86_64/
489 - directory with info on Linux support for AMD x86-64 (Hammer) machines.
490 xtensa/
491 - directory with documents relating to arch/xtensa port/implementation
492 xz.txt
493 - how to make use of the XZ data compression within linux kernel
494 zh_CN/
495 - directory with Chinese translations of various documents
496 zorro.txt
497 - info on writing drivers for Zorro bus devices found on Amigas.
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