Move the document describing the system sleep state transitions API
for devices to Documentation/driver-api/pm/, convert it to reST and
update it to use current terminology.  Also remove the remaining
reference to the old version of it from pm.h.

The new document still contains references to some documents in the
.txt format that will be converted later.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Refresh the struct dev_pm_ops kerneldoc comment, so that it looks
better and is more readable after processing by Sphinx, and drop
the kerneldoc marker from a few other comments ("PM_EVENT_ messages"
and a couple of enum types declarations) which are not proper
kerneldoc and generally confuse Sphinx.

Also change the comment describing struct dev_pm_domain into
a kerneldoc one.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Ben writes: "This series fixes some bugs I found in the new doc build system."

In any case where we recurse but don't mention $(MAKE) literally in
the recipe, we need to add a '+' at the start of the command to ensure
that parallel makes and various other options work properly.

Fixes: 609afe6b ("Documentation/sphinx: build the media intermediate ...")
Tested-by: Markus Heiser <markus.heiser@darmarit.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

As we use redirection to create the SVG file, even a failed conversion
will create the file and 'make' will consider it up-to-date if the
build is retried.  We should delete it in case of failure.

Fixes: ec868e4e ("docs-rst: media: build SVG from graphviz files")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

As $(SHELL) doesn't include the -e option, any loop or other sequence
needs to include explicit checks for failing commands.

Fixes: 609afe6b ("Documentation/sphinx: build the media intermediate ...")
Fixes: 606b9ac8 ("doc-rst: generic way to build only sphinx sub-folders")
Fixes: cd21379b ("doc-rst: generic way to build PDF of sub-folders")
Tested-by: Markus Heiser <markus.heiser@darmarit.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Make targets that don't depend on Sphinx work without warnings about
missing Sphinx. 'make cleandocs' will work without Sphinx just fine, and
the targets that are no-ops for Sphinx should just be skipped. Move them
outside of the HAVE_SPHINX checks to take precedence over the .DEFAULT
target for HAVE_SPHINX=0.
Reported-by: Jim Davis <jim.epost@gmail.com>
Reference: http://lkml.kernel.org/r/CA+r1ZhjRVqkjPXGOGB_BOAX2Hkfb+qQCtTzFfBMFeH1Mfeej7w@mail.gmail.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

The cleandocs target won't work if I use a different output folder::

  $ make O=/tmp/kernel SPHINXDIRS="process" cleandocs
  make[1]: Entering directory '/tmp/kernel'
  make[3]: *** No rule to make target 'clean'.  Stop.
  ... Documentation/Makefile.sphinx:100: recipe for target 'cleandocs' failed
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Use PYTHONDONTWRITEBYTECODE=1 to prevent python from creating .pyc files
in the source tree. Python 3.2 has a __pycache__ scheme [1], but before
that the only alternative seems to be to copy the source files to the
build tree to ensure the .pyc files are created there too. Just prevent
.pyc file generation for simplicity.

Considering the small amount of python code to compile (assuming sphinx
itself has .pyc around), the impact on build is neglible.

[1] http://stackoverflow.com/questions/3522079/changing-the-directory-where-pyc-files-are-created

References: http://lkml.kernel.org/r/CAMuHMdVxqpH7-9XJ+YE_pgoA+-fe0969cSkOehYh3uubYcrhZA@mail.gmail.comReported-by: Geert Uytterhoeven <geert@linux-m68k.org>
References: http://lkml.kernel.org/r/1485816692.2900.17.camel@decadent.org.ukReported-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

A fairly straightforward conversion to RST; the document is then added to
the driver-api manual.

Of course, this document has seen no substantive changes since 2008, so
chances are it needs work in other areas as well.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Convert deviceiobook.tmpl to RST and incorporate it into the driver API
manual.

Like the rest of our documentation, this one could use some work.  There's
no mention of ioremap() and friends, no mention of io_read*() and friends.
But we have nice documentation for all those folks writing new drivers that
do port I/O :).

The :c:func: notation has been left off of all the read*/write* functions.
There's no kerneldoc comments for them anyway, so those links will never be
live, and writing a bunch of repetitive "read a byte from I/O memory"
comments lacks appeal.

Cc: Matthew Wilcox <willy@infradead.org>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Tested by the command:

    make htmldocs

During the compiling process, zh_CN/coding-style.rst has no errors and
warnings generated, the generated html document has been checked.
Signed-off-by: Andy Deng <theandy.deng@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This commit applies all changes from the English version, and should
be able to work with the documentation build system.
Signed-off-by: Andy Deng <theandy.deng@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Some of the sentences in Chapters 19 and 20 are re-translated:

- Fixed translation errors in Section 2 of Chapter 19 to prevent
  misleading readers;
- Retranslate some sentences to make the translation more clear and
  accurate.
Signed-off-by: Andy Deng <theandy.deng@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This patch fix some double words found in Documentation.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Clearly nobody ever tried to build the documentation for the radix tree
before:

include/linux/radix-tree.h:400: warning: cannot understand function
prototype: 'void ** radix_tree_iter_init(struct radix_tree_iter *iter,
unsigned long start) '

Indeed, the regexes only handled a single '*', not one-or-more.  I have
tried to fix that, but now I have perl regexes all over my hands, and
I fear I shall never be clean again.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Two of the example command lines use an argument to echo of "-c" which
isn't valid in (most versions of) echo causing these examples to fail.
Correct the argument to "-n" which works correctly.
Signed-off-by: Steven Price <steven@ecrips.co.uk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Add a bunch of entries reflective of programs that the kernel build:
sortextable, dtc. And while at it, expand the lex*.c entries to cover
e.g: dtc-lexer.c. Finally, exclude devicetable-offsets.h
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This looks like it was accidentally caught up in e21a05cb (doc:
cpuset: Update the cpuset flag file, 2010-02-24).

While I'm touching the line, also fix the posessive "cpusets" ->
"cpuset's".
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

... and a minor missing period at EOL
Signed-off-by: Sanjeev Gupta <ghane0@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation for array parameters passed in a function, like the first
argument in the function below, weren't getting exported in the rst
format, although they work fine for html and pdf formats:

  void drm_clflush_pages(struct page * pages[], unsigned long num_pages)

That's because the string key to store the description in the
parameterdescs dictionary doesn't have the [] suffix.  This cleans up
the suffix from the key before accessing the dictionary.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Fixes: c0d1b6ee ("kernel-doc: produce RestructuredText output")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

The current CPU hotplug is outdated. During the update to what we
currently have I rewrote it partly and moved to sphinx format.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Joel Schopp <jschopp@austin.ibm.com>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

$type_struct_full and friends are only used by the restructuredText
backend, because it needs to separate enum/struct/typedef/union from
the name of the type.  However, $type_struct is *also* used by the rST
backend.  This is confusing.

This patch replaces $type_struct's use in the rST backend with a new
$type_fallback; it modifies $type_struct so that it can be used in the
rST backend; and creates regular expressions like $type_struct
for enum/typedef/union, for use in all backends.

Note that, compared to $type_*_full, in the new regexes $1 includes both
the "kind" and the name (before, $1 was pretty much a constant).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Note that, in order to produce the correct Docbook markup, the "." or "->"
must be separated from the member name in the regex's captured fields.  For
consistency, this change is applied to $type_member and $type_member_func
too, not just to $type_member_xml.

List mode only prints the struct name, to avoid any undesired change in
the operation of docproc.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

The restructuredText output includes both the parameter type and
the name for functions and function-typed members.  Do the same
for docbook.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

An inline function can have an attribute, as in include/linux/log2.h,
and kernel-doc handles this already for simple cases.  However,
some attributes have arguments (e.g. the "target" attribute).
Handle those too.

Furthermore, attributes could be at the beginning of a function
declaration, before the return type.  To correctly handle this case,
you need to strip spaces after the attributes; otherwise, dump_function
is left confused.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

A prototype like

    /**
     * foo - sample definition
     * @bar: a parameter
     */
    int foo(int (*bar)(int x,
                       int y));

is currently producing

    .. c:function:: int foo (int (*bar) (int x,                    int y)

       sample definition

    **Parameters**

    ``int (*)(int x,                    int y) bar``
      a parameter

Collapse the spaces so that the output is nicer.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Even though the jitter due to USB1.1 may be 1ms,
NTP can reduce its effect significantly.  And
USB2.0 reduces this anyway.
Signed-off-by: Sanjeev Gupta <ghane0@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

No semantic changes.  The next patch in this series will
do the actual changes to sync with NTP current
best practices
Signed-off-by: Sanjeev Gupta <ghane0@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

timepps.h , as well as PPS sample test utilities, are
no longer in the kernel tree.  Update documentation
to point to new locations.
Signed-off-by: Sanjeev Gupta <ghane0@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation: cpufreq: Update supported powernv processors
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This is a manual conversion of the existing DocBook documentation
for IIO.  The intent is not to substantially change any of the
content in this patch, but to give a base to build upon.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

In the actual implementation ether_addr_equal function tests for equality to 0
when returning. It seems in commit 0d74c4 it is somehow overlooked to change
this operator to reflect the actual function.
Signed-off-by: Cihangir Akturk <cakturk@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

The 80211.tmpl DocBook file was removed in commit 819bf593 ("docs-rst:
sphinxify 802.11 documentation"), but the 80211.xml target was re-added to
the Makefile by commit 7ddedebb ("ALSA: doc: ReSTize
writing-an-alsa-driver document"), leading to a failure when building the
documentation:

*** No rule to make target 'Documentation/DocBook/80211.xml', needed by
'Documentation/DocBook/80211.aux.xml'.

cc: stable@vger.kernel.org
Signed-off-by: John Brooks <john@fastquake.com>
Mea-culpa-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Linux 4.10-rc1

I am getting the following warning when I build kernel 4.9-git on my
PowerBook G4 with a 32-bit PPC processor:

    AS      arch/powerpc/kernel/misc_32.o
  arch/powerpc/kernel/misc_32.S:299:7: warning: "CONFIG_FSL_BOOKE" is not defined [-Wundef]

This problem is evident after commit 989cea5c ("kbuild: prevent
lib-ksyms.o rebuilds"); however, this change in kbuild only exposes an
error that has been in the code since 2005 when this source file was
created.  That was with commit 9994a338 ("powerpc: Introduce
entry_{32,64}.S, misc_{32,64}.S, systbl.S").

The offending line does not make a lot of sense.  This error does not
seem to cause any errors in the executable, thus I am not recommending
that it be applied to any stable versions.

Thanks to Nicholas Piggin for suggesting this solution.

Fixes: 9994a338 ("powerpc: Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S")
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The timer type simplifications caused a new gcc warning:

  drivers/base/power/domain.c: In function ‘genpd_runtime_suspend’:
  drivers/base/power/domain.c:562:14: warning: ‘time_start’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));

despite the actual use of "time_start" not having changed in any way.
It appears that simply changing the type of ktime_t from a union to a
plain scalar type made gcc check the use.

The variable wasn't actually used uninitialized, but gcc apparently
failed to notice that the conditional around the use was exactly the
same as the conditional around the initialization of that variable.

Add an unnecessary initialization just to shut up the compiler.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull timer type cleanups from Thomas Gleixner:
 "This series does a tree wide cleanup of types related to
  timers/timekeeping.

   - Get rid of cycles_t and use a plain u64. The type is not really
     helpful and caused more confusion than clarity

   - Get rid of the ktime union. The union has become useless as we use
     the scalar nanoseconds storage unconditionally now. The 32bit
     timespec alike storage got removed due to the Y2038 limitations
     some time ago.

     That leaves the odd union access around for no reason. Clean it up.

  Both changes have been done with coccinelle and a small amount of
  manual mopping up"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ktime: Get rid of ktime_equal()
  ktime: Cleanup ktime_set() usage
  ktime: Get rid of the union
  clocksource: Use a plain u64 instead of cycle_t