platform/kernel/linux-exynos.git
8 years agokernel-doc/rst: change the output layout
Jani Nikula [Thu, 26 May 2016 15:30:27 +0000 (18:30 +0300)]
kernel-doc/rst: change the output layout

Move away from field lists, and simply use **strong emphasis** for
section headings on lines of their own. Do not use rst section headings,
because their nesting depth depends on the surrounding context, which
kernel-doc has no knowledge of. Also, they do not need to end up in any
table of contexts or indexes.

There are two related immediate benefits. Field lists are typically
rendered in two columns, while the new style uses the horizontal width
better. With no extra indent on the left, there's no need to be as fussy
about it. Field lists are more susceptible to indentation problems than
the new style.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: strip leading blank lines from inline doc comments
Jani Nikula [Thu, 26 May 2016 19:04:42 +0000 (22:04 +0300)]
kernel-doc: strip leading blank lines from inline doc comments

The inline member markup allows whitespace lines before the actual
documentation starts. Strip the leading blank lines. This improves the
rst output.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: blank lines in output are not needed
Jani Nikula [Thu, 26 May 2016 19:04:33 +0000 (22:04 +0300)]
kernel-doc/rst: blank lines in output are not needed

Current approach leads to two blank lines, while one is enough.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: fix wrong code indentation
Jani Nikula [Thu, 26 May 2016 19:04:06 +0000 (22:04 +0300)]
kernel-doc: fix wrong code indentation

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: do not regard $, %, or & prefixes as special in section names
Jani Nikula [Thu, 26 May 2016 05:57:29 +0000 (08:57 +0300)]
kernel-doc: do not regard $, %, or & prefixes as special in section names

The use of these is confusing in the script, and per this grep, they're
not used anywhere anyway:

$ git grep " \* [%$&][a-zA-Z0-9_]*:" -- *.[ch] | grep -v "\$\(Id\|Revision\|Date\)"

While at it, throw out the constants array, nothing is ever put there
again.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: highlight function/struct/enum purpose lines too
Jani Nikula [Thu, 26 May 2016 14:18:17 +0000 (17:18 +0300)]
kernel-doc/rst: highlight function/struct/enum purpose lines too

Let the user use @foo, &bar, %baz, etc. in the first kernel-doc purpose
line too.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: drop redundant unescape in highlighting
Jani Nikula [Thu, 26 May 2016 13:56:27 +0000 (16:56 +0300)]
kernel-doc/rst: drop redundant unescape in highlighting

This bit is already done by xml_unescape() above.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: add support for struct/union/enum member references
Jani Nikula [Thu, 26 May 2016 13:35:02 +0000 (16:35 +0300)]
kernel-doc/rst: add support for struct/union/enum member references

Link "&foo->bar", "&foo->bar()", "&foo.bar", and "&foo.bar()" to the
struct/union/enum foo definition. The members themselves do not
currently have anchors to link to, but this is better than nothing, and
promotes a universal notation.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: add support for &union foo and &typedef foo references
Jani Nikula [Thu, 26 May 2016 10:57:18 +0000 (13:57 +0300)]
kernel-doc/rst: add support for &union foo and &typedef foo references

Let the user use "&union foo" and "&typedef foo" to reference foo. The
difference to using "union &foo", "typedef &foo", or just "&foo" (which
are valid too) is that "union" and "typedef" become part of the link
text.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: &foo references are more universal than structs
Jani Nikula [Thu, 26 May 2016 10:57:06 +0000 (13:57 +0300)]
kernel-doc/rst: &foo references are more universal than structs

It's possible to use &foo to reference structs, enums, typedefs, etc. in
the Sphinx C domain. Thus do not prefix the links with "struct".

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: reference functions according to C domain spec
Jani Nikula [Thu, 26 May 2016 08:28:16 +0000 (11:28 +0300)]
kernel-doc/rst: reference functions according to C domain spec

The Sphinx C domain spec says function references should include the
parens ().

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: do not output DOC: section titles for requested ones
Jani Nikula [Sun, 29 May 2016 19:27:35 +0000 (22:27 +0300)]
kernel-doc/rst: do not output DOC: section titles for requested ones

If the user requests a specific DOC: section by name, do not output its
section title. In these cases, the surrounding context already has a
heading, and the DOC: section title is only used as an identifier and a
heading for clarity in the source file.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: add names for output selection
Jani Nikula [Sun, 29 May 2016 19:19:35 +0000 (22:19 +0300)]
kernel-doc: add names for output selection

Make the output selection a bit more readable by adding constants for
the various types of output selection. While at it, actually call the
variable for choosing what to output $output_selection.

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: add names for states and substates
Jani Nikula [Thu, 26 May 2016 11:56:05 +0000 (14:56 +0300)]
kernel-doc: add names for states and substates

Make the state machine a bit more readable by adding constants for
parser states and inline member documentation parser substates. While at
it, rename the "split" documentation to "inline" documentation.

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: nicer referencing of struct in docbook->rst conversion
Jani Nikula [Thu, 26 May 2016 07:40:17 +0000 (10:40 +0300)]
Documentation/sphinx: nicer referencing of struct in docbook->rst conversion

Add "struct" in the label of the reference.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agosphinx: update docbook->rst conversion script match C domain spec
Jani Nikula [Thu, 26 May 2016 07:15:18 +0000 (10:15 +0300)]
sphinx: update docbook->rst conversion script match C domain spec

Function references should include the parens (), struct references
should not include "struct".

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agosphinx: cheesy script to convert .tmpl files
Jonathan Corbet [Mon, 7 Mar 2016 03:29:31 +0000 (20:29 -0700)]
sphinx: cheesy script to convert .tmpl files

This script uses pandoc to convert existing DocBook template files to RST
templates.  A couple of sed scripts are need to massage things both before
and after the conversion, but the result is then usable with no hand
editing.

[Jani: Change usage to tmplcvt <in> <out>. Fix escaping for docproc
directives. Add support the new kernel-doc extension.]

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: set version and release properly
Jani Nikula [Sat, 28 May 2016 12:25:41 +0000 (15:25 +0300)]
Documentation/sphinx: set version and release properly

Read the version and release from the top level Makefile (for use when
Sphinx is invoked directly, by e.g. Read the Docs), but override them
via Sphinx command line arguments in a normal documentation build.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: configure the kernel-doc extension
Jani Nikula [Fri, 20 May 2016 08:51:47 +0000 (11:51 +0300)]
Documentation/sphinx: configure the kernel-doc extension

Tell Sphinx where to find the extension, and pass on the kernel src tree
and kernel-doc paths to the extension.

With this, any .rst files under Documentation may contain the kernel-doc
rst directive to include kernel-doc documentation from any source file.

While building, it may be handy to pass kernel-doc extension
configuration on the command line. For example, 'make SPHINXOPTS="-D
kerneldoc_verbosity=0" htmldocs' silences all stderr output from
kernel-doc when the kernel-doc exit code is 0. (The stderr will be
logged unconditionally when the exit code is non-zero.)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: add Sphinx kernel-doc directive extension
Jani Nikula [Wed, 18 May 2016 20:30:30 +0000 (23:30 +0300)]
Documentation/sphinx: add Sphinx kernel-doc directive extension

Add an extension to handle kernel-doc directives, to call kernel-doc
according to the arguments and parameters given to the reStructuredText
directive.

The syntax for the kernel-doc directive is:

.. kernel-doc:: FILENAME
   :export:
   :internal:
   :functions: FUNCTION [FUNCTION ...]
   :doc: SECTION TITLE

Of the directive options export, internal, functions, and doc, currently
only one option may be given at a time.

The FILENAME is relative from the kernel source tree root.

The extension notifies Sphinx about the document dependency on FILENAME,
causing the document to be rebuilt when the file has been changed.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation: add .gitignore
Jani Nikula [Thu, 19 May 2016 17:53:23 +0000 (20:53 +0300)]
Documentation: add .gitignore

The Sphinx output directory is generated.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: add basic working Sphinx configuration and build
Jani Nikula [Thu, 19 May 2016 12:14:05 +0000 (15:14 +0300)]
Documentation/sphinx: add basic working Sphinx configuration and build

Add basic configuration and makefile to build documentation from any
.rst files under Documentation using Sphinx. For starters, there's just
the placeholder index.rst.

At the top level Makefile, hook Sphinx documentation targets alongside
(but independent of) the DocBook toolchain, having both be run on the
various 'make *docs' targets.

All Sphinx processing is placed into Documentation/Makefile.sphinx. Both
that and the Documentation/DocBook/Makefile are now expected to handle
all the documentation targets, explicitly ignoring them if they're not
relevant for that particular toolchain. The changes to the existing
DocBook Makefile are kept minimal.

There is graceful handling of missing Sphinx and rst2pdf (which is
needed for pdf output) by checking for the tool and python module,
respectively, with informative messages to the user.

If the Read the Docs theme (sphinx_rtd_theme) is available, use it, but
otherwise gracefully fall back to the Sphinx default theme, with an
informative message to the user, and slightly less pretty HTML output.

Sphinx can now handle htmldocs, pdfdocs (if rst2pdf is available),
epubdocs and xmldocs targets. The output documents are written into per
output type subdirectories under Documentation/output.

Finally, you can pass options to sphinx-build using the SPHINXBUILD make
variable. For example, 'make SPHINXOPTS=-v htmldocs' for more verbose
output from Sphinx.

This is based on the original work by Jonathan Corbet, but he probably
wouldn't recognize this as his own anymore.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: support printing exported and non-exported symbols
Jani Nikula [Thu, 21 Jan 2016 11:05:22 +0000 (13:05 +0200)]
kernel-doc: support printing exported and non-exported symbols

Currently we use docproc to figure out which symbols are exported, and
then docproc calls kernel-doc on specific functions, to get
documentation on exported functions. According to git blame and docproc
comments, this is due to historical reasons, as functions and their
corresponding EXPORT_SYMBOL* may have been in different files. However
for more than ten years the recommendation in CodingStyle has been to
place the EXPORT_SYMBOL* immediately after the closing function brace
line.

Additionally, the kernel-doc comments for functions are generally placed
above the function definition in the .c files (i.e. where the
EXPORT_SYMBOL* is) rather than above the declaration in the .h
files. There are some exceptions to this, but AFAICT none of these are
included in DocBook documentation using the "!E" docproc directive.

Therefore, assuming the EXPORT_SYMBOL* and kernel-doc are with the
function definition, kernel-doc can extract the exported vs. not
information by making two passes on the input file. Add support for that
via the new -export and -internal parameters.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc/rst: fix use of uninitialized value
Jani Nikula [Thu, 19 May 2016 17:32:48 +0000 (20:32 +0300)]
kernel-doc/rst: fix use of uninitialized value

I'm not quite sure why the errors below are happening, but this fixes
them.

Use of uninitialized value in string ne at ./scripts/kernel-doc line 1819, <IN> line 6494.
Use of uninitialized value $_[0] in join or string at ./scripts/kernel-doc line 1759, <IN> line 6494.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoLinux 4.7-rc1 v4.7-rc1
Linus Torvalds [Sun, 29 May 2016 16:29:24 +0000 (09:29 -0700)]
Linux 4.7-rc1

8 years agohash_string: Fix zero-length case for !DCACHE_WORD_ACCESS
George Spelvin [Sun, 29 May 2016 12:05:56 +0000 (08:05 -0400)]
hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS

The self-test was updated to cover zero-length strings; the function
needs to be updated, too.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoRename other copy of hash_string to hashlen_string
George Spelvin [Sun, 29 May 2016 05:26:41 +0000 (01:26 -0400)]
Rename other copy of hash_string to hashlen_string

The original name was simply hash_string(), but that conflicted with a
function with that name in drivers/base/power/trace.c, and I decided
that calling it "hashlen_" was better anyway.

But you have to do it in two places.

[ This caused build errors for architectures that don't define
  CONFIG_DCACHE_WORD_ACCESS   - Linus ]

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agohpfs: implement the show_options method
Mikulas Patocka [Tue, 24 May 2016 20:49:18 +0000 (22:49 +0200)]
hpfs: implement the show_options method

The HPFS filesystem used generic_show_options to produce string that is
displayed in /proc/mounts.  However, there is a problem that the options
may disappear after remount.  If we mount the filesystem with option1
and then remount it with option2, /proc/mounts should show both option1
and option2, however it only shows option2 because the whole option
string is replaced with replace_mount_options in hpfs_remount_fs.

To fix this bug, implement the hpfs_show_options function that prints
options that are currently selected.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoaffs: fix remount failure when there are no options changed
Mikulas Patocka [Tue, 24 May 2016 20:48:33 +0000 (22:48 +0200)]
affs: fix remount failure when there are no options changed

Commit c8f33d0bec99 ("affs: kstrdup() memory handling") checks if the
kstrdup function returns NULL due to out-of-memory condition.

However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL.  In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists.  The mount syscall then fails with
ENOMEM.

This patch fixes the bug.  We fail with ENOMEM only if data is non-NULL.

The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).

Fixes: c8f33d0bec99 ("affs: kstrdup() memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agohpfs: fix remount failure when there are no options changed
Mikulas Patocka [Tue, 24 May 2016 20:47:00 +0000 (22:47 +0200)]
hpfs: fix remount failure when there are no options changed

Commit ce657611baf9 ("hpfs: kstrdup() out of memory handling") checks if
the kstrdup function returns NULL due to out-of-memory condition.

However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL.  In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists.  The mount syscall then fails with
ENOMEM.

This patch fixes the bug.  We fail with ENOMEM only if data is non-NULL.

The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).

Fixes: ce657611baf9 ("hpfs: kstrdup() out of memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sat, 28 May 2016 23:41:39 +0000 (16:41 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull more MIPS updates from Ralf Baechle:
 "This is the secondnd batch of MIPS patches for 4.7. Summary:

  CPS:
   - Copy EVA configuration when starting secondary VPs.

  EIC:
   - Clear Status IPL.

  Lasat:
   - Fix a few off by one bugs.

  lib:
   - Mark intrinsics notrace.  Not only are the intrinsics
     uninteresting, it would cause infinite recursion.

  MAINTAINERS:
   - Add file patterns for MIPS BRCM device tree bindings.
   - Add file patterns for mips device tree bindings.

  MT7628:
   - Fix MT7628 pinmux typos.
   - wled_an pinmux gpio.
   - EPHY LEDs pinmux support.

  Pistachio:
   - Enable KASLR

  VDSO:
   - Build microMIPS VDSO for microMIPS kernels.
   - Fix aliasing warning by building with `-fno-strict-aliasing' for
     debugging but also tracing them might result in recursion.

  Misc:
   - Add missing FROZEN hotplug notifier transitions.
   - Fix clk binding example for varioius PIC32 devices.
   - Fix cpu interrupt controller node-names in the DT files.
   - Fix XPA CPU feature separation.
   - Fix write_gc0_* macros when writing zero.
   - Add inline asm encoding helpers.
   - Add missing VZ accessor microMIPS encodings.
   - Fix little endian microMIPS MSA encodings.
   - Add 64-bit HTW fields and fix its configuration.
   - Fix sigreturn via VDSO on microMIPS kernel.
   - Lots of typo fixes.
   - Add definitions of SegCtl registers and use them"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (49 commits)
  MIPS: Add missing FROZEN hotplug notifier transitions
  MIPS: Build microMIPS VDSO for microMIPS kernels
  MIPS: Fix sigreturn via VDSO on microMIPS kernel
  MIPS: devicetree: fix cpu interrupt controller node-names
  MIPS: VDSO: Build with `-fno-strict-aliasing'
  MIPS: Pistachio: Enable KASLR
  MIPS: lib: Mark intrinsics notrace
  MIPS: Fix 64-bit HTW configuration
  MIPS: Add 64-bit HTW fields
  MAINTAINERS: Add file patterns for mips device tree bindings
  MAINTAINERS: Add file patterns for mips brcm device tree bindings
  MIPS: Simplify DSP instruction encoding macros
  MIPS: Add missing tlbinvf/XPA microMIPS encodings
  MIPS: Fix little endian microMIPS MSA encodings
  MIPS: Add missing VZ accessor microMIPS encodings
  MIPS: Add inline asm encoding helpers
  MIPS: Spelling fix lets -> let's
  MIPS: VR41xx: Fix typo
  MIPS: oprofile: Fix typo
  MIPS: math-emu: Fix typo
  ...

8 years agofs: fix binfmt_aout.c build error
Guenter Roeck [Sat, 28 May 2016 22:26:02 +0000 (15:26 -0700)]
fs: fix binfmt_aout.c build error

Various builds (such as i386:allmodconfig) fail with

  fs/binfmt_aout.c:133:2: error: expected identifier or '(' before 'return'
  fs/binfmt_aout.c:134:1: error: expected identifier or '(' before '}' token

[ Oops. My bad, I had stupidly thought that "allmodconfig" covered this
  on x86-64 too, but it obviously doesn't.  Egg on my face.  - Linus ]

Fixes: 5d22fc25d4fc ("mm: remove more IS_ERR_VALUE abuses")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'hash' of git://ftp.sciencehorizons.net/linux
Linus Torvalds [Sat, 28 May 2016 23:15:25 +0000 (16:15 -0700)]
Merge branch 'hash' of git://ftp.sciencehorizons.net/linux

Pull string hash improvements from George Spelvin:
 "This series does several related things:

   - Makes the dcache hash (fs/namei.c) useful for general kernel use.

     (Thanks to Bruce for noticing the zero-length corner case)

   - Converts the string hashes in <linux/sunrpc/svcauth.h> to use the
     above.

   - Avoids 64-bit multiplies in hash_64() on 32-bit platforms.  Two
     32-bit multiplies will do well enough.

   - Rids the world of the bad hash multipliers in hash_32.

     This finishes the job started in commit 689de1d6ca95 ("Minimal
     fix-up of bad hashing behavior of hash_64()")

     The vast majority of Linux architectures have hardware support for
     32x32-bit multiply and so derive no benefit from "simplified"
     multipliers.

     The few processors that do not (68000, h8/300 and some models of
     Microblaze) have arch-specific implementations added.  Those
     patches are last in the series.

   - Overhauls the dcache hash mixing.

     The patch in commit 0fed3ac866ea ("namei: Improve hash mixing if
     CONFIG_DCACHE_WORD_ACCESS") was an off-the-cuff suggestion.
     Replaced with a much more careful design that's simultaneously
     faster and better.  (My own invention, as there was noting suitable
     in the literature I could find.  Comments welcome!)

   - Modify the hash_name() loop to skip the initial HASH_MIX().  This
     would let us salt the hash if we ever wanted to.

   - Sort out partial_name_hash().

     The hash function is declared as using a long state, even though
     it's truncated to 32 bits at the end and the extra internal state
     contributes nothing to the result.  And some callers do odd things:

      - fs/hfs/string.c only allocates 32 bits of state
      - fs/hfsplus/unicode.c uses it to hash 16-bit unicode symbols not bytes

   - Modify bytemask_from_count to handle inputs of 1..sizeof(long)
     rather than 0..sizeof(long)-1.  This would simplify users other
     than full_name_hash"

  Special thanks to Bruce Fields for testing and finding bugs in v1.  (I
  learned some humbling lessons about "obviously correct" code.)

  On the arch-specific front, the m68k assembly has been tested in a
  standalone test harness, I've been in contact with the Microblaze
  maintainers who mostly don't care, as the hardware multiplier is never
  omitted in real-world applications, and I haven't heard anything from
  the H8/300 world"

* 'hash' of git://ftp.sciencehorizons.net/linux:
  h8300: Add <asm/hash.h>
  microblaze: Add <asm/hash.h>
  m68k: Add <asm/hash.h>
  <linux/hash.h>: Add support for architecture-specific functions
  fs/namei.c: Improve dcache hash function
  Eliminate bad hash multipliers from hash_32() and  hash_64()
  Change hash_64() return value to 32 bits
  <linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
  fs/namei.c: Add hashlen_string() function
  Pull out string hash to <linux/stringhash.h>

8 years agoh8300: Add <asm/hash.h>
George Spelvin [Wed, 25 May 2016 18:19:49 +0000 (14:19 -0400)]
h8300: Add <asm/hash.h>

This will improve the performance of hash_32() and hash_64(), but due
to complete lack of multi-bit shift instructions on H8, performance will
still be bad in surrounding code.

Designing H8-specific hash algorithms to work around that is a separate
project.  (But if the maintainers would like to get in touch...)

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
8 years agomicroblaze: Add <asm/hash.h>
George Spelvin [Wed, 25 May 2016 15:06:09 +0000 (11:06 -0400)]
microblaze: Add <asm/hash.h>

Microblaze is an FPGA soft core that can be configured various ways.

If it is configured without a multiplier, the standard __hash_32()
will require a call to __mulsi3, which is a slow software loop.

Instead, use a shift-and-add sequence for the constant multiply.
GCC knows how to do this, but it's not as clever as some.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
8 years agom68k: Add <asm/hash.h>
George Spelvin [Thu, 26 May 2016 15:36:19 +0000 (11:36 -0400)]
m68k: Add <asm/hash.h>

This provides a multiply by constant GOLDEN_RATIO_32 = 0x61C88647
for the original mc68000, which lacks a 32x32-bit multiply instruction.

Yes, the amount of optimization effort put in is excessive. :-)

Shift-add chain found by Yevgen Voronenko's Hcub algorithm at
http://spiral.ece.cmu.edu/mcm/gen.html

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
8 years ago<linux/hash.h>: Add support for architecture-specific functions
George Spelvin [Fri, 27 May 2016 02:11:51 +0000 (22:11 -0400)]
<linux/hash.h>: Add support for architecture-specific functions

This is just the infrastructure; there are no users yet.

This is modelled on CONFIG_ARCH_RANDOM; a CONFIG_ symbol declares
the existence of <asm/hash.h>.

That file may define its own versions of various functions, and define
HAVE_* symbols (no CONFIG_ prefix!) to suppress the generic ones.

Included is a self-test (in lib/test_hash.c) that verifies the basics.
It is NOT in general required that the arch-specific functions compute
the same thing as the generic, but if a HAVE_* symbol is defined with
the value 1, then equality is tested.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
Cc: Alistair Francis <alistai@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
8 years agofs/namei.c: Improve dcache hash function
George Spelvin [Mon, 23 May 2016 11:43:58 +0000 (07:43 -0400)]
fs/namei.c: Improve dcache hash function

Patch 0fed3ac866 improved the hash mixing, but the function is slower
than necessary; there's a 7-instruction dependency chain (10 on x86)
each loop iteration.

Word-at-a-time access is a very tight loop (which is good, because
link_path_walk() is one of the hottest code paths in the entire kernel),
and the hash mixing function must not have a longer latency to avoid
slowing it down.

There do not appear to be any published fast hash functions that:
1) Operate on the input a word at a time, and
2) Don't need to know the length of the input beforehand, and
3) Have a single iterated mixing function, not needing conditional
   branches or unrolling to distinguish different loop iterations.

One of the algorithms which comes closest is Yann Collet's xxHash, but
that's two dependent multiplies per word, which is too much.

The key insights in this design are:

1) Barring expensive ops like multiplies, to diffuse one input bit
   across 64 bits of hash state takes at least log2(64) = 6 sequentially
   dependent instructions.  That is more cycles than we'd like.
2) An operation like "hash ^= hash << 13" requires a second temporary
   register anyway, and on a 2-operand machine like x86, it's three
   instructions.
3) A better use of a second register is to hold a two-word hash state.
   With careful design, no temporaries are needed at all, so it doesn't
   increase register pressure.  And this gets rid of register copying
   on 2-operand machines, so the code is smaller and faster.
4) Using two words of state weakens the requirement for one-round mixing;
   we now have two rounds of mixing before cancellation is possible.
5) A two-word hash state also allows operations on both halves to be
   done in parallel, so on a superscalar processor we get more mixing
   in fewer cycles.

I ended up using a mixing function inspired by the ChaCha and Speck
round functions.  It is 6 simple instructions and 3 cycles per iteration
(assuming multiply by 9 can be done by an "lea" instruction):

x ^= *input++;
y ^= x; x = ROL(x, K1);
x += y; y = ROL(y, K2);
y *= 9;

Not only is this reversible, two consecutive rounds are reversible:
if you are given the initial and final states, but not the intermediate
state, it is possible to compute both input words.  This means that at
least 3 words of input are required to create a collision.

(It also has the property, used by hash_name() to avoid a branch, that
it hashes all-zero to all-zero.)

The rotate constants K1 and K2 were found by experiment.  The search took
a sample of random initial states (I used 1023) and considered the effect
of flipping each of the 64 input bits on each of the 128 output bits two
rounds later.  Each of the 8192 pairs can be considered a biased coin, and
adding up the Shannon entropy of all of them produces a score.

The best-scoring shifts also did well in other tests (flipping bits in y,
trying 3 or 4 rounds of mixing, flipping all 64*63/2 pairs of input bits),
so the choice was made with the additional constraint that the sum of the
shifts is odd and not too close to the word size.

The final state is then folded into a 32-bit hash value by a less carefully
optimized multiply-based scheme.  This also has to be fast, as pathname
components tend to be short (the most common case is one iteration!), but
there's some room for latency, as there is a fair bit of intervening logic
before the hash value is used for anything.

(Performance verified with "bonnie++ -s 0 -n 1536:-2" on tmpfs.  I need
a better benchmark; the numbers seem to show a slight dip in performance
between 4.6.0 and this patch, but they're too noisy to quote.)

Special thanks to Bruce fields for diligent testing which uncovered a
nasty fencepost error in an earlier version of this patch.

[checkpatch.pl formatting complaints noted and respectfully disagreed with.]

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
8 years agoEliminate bad hash multipliers from hash_32() and hash_64()
George Spelvin [Fri, 27 May 2016 03:00:23 +0000 (23:00 -0400)]
Eliminate bad hash multipliers from hash_32() and  hash_64()

The "simplified" prime multipliers made very bad hash functions, so get rid
of them.  This completes the work of 689de1d6ca.

To avoid the inefficiency which was the motivation for the "simplified"
multipliers, hash_64() on 32-bit systems is changed to use a different
algorithm.  It makes two calls to hash_32() instead.

drivers/media/usb/dvb-usb-v2/af9015.c uses the old GOLDEN_RATIO_PRIME_32
for some horrible reason, so it inherits a copy of the old definition.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
8 years agoChange hash_64() return value to 32 bits
George Spelvin [Fri, 27 May 2016 02:22:01 +0000 (22:22 -0400)]
Change hash_64() return value to 32 bits

That's all that's ever asked for, and it makes the return
type of hash_long() consistent.

It also allows (upcoming patch) an optimized implementation
of hash_64 on 32-bit machines.

I tried adding a BUILD_BUG_ON to ensure the number of bits requested
was never more than 32 (most callers use a compile-time constant), but
adding <linux/bug.h> to <linux/hash.h> breaks the tools/perf compiler
unless tools/perf/MANIFEST is updated, and understanding that code base
well enough to update it is too much trouble.  I did the rest of an
allyesconfig build with such a check, and nothing tripped.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
8 years ago<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
George Spelvin [Fri, 20 May 2016 17:31:33 +0000 (13:31 -0400)]
<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()

Finally, the first use of previous two patches: eliminate the
separate ad-hoc string hash functions in the sunrpc code.

Now hash_str() is a wrapper around hash_string(), and hash_mem() is
likewise a wrapper around full_name_hash().

Note that sunrpc code *does* call hash_mem() with a zero length, which
is why the previous patch needed to handle that in full_name_hash().
(Thanks, Bruce, for finding that!)

This also eliminates the only caller of hash_long which asks for
more than 32 bits of output.

The comment about the quality of hashlen_string() and full_name_hash()
is jumping the gun by a few patches; they aren't very impressive now,
but will be improved greatly later in the series.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: linux-nfs@vger.kernel.org
8 years agofs/namei.c: Add hashlen_string() function
George Spelvin [Fri, 20 May 2016 12:41:37 +0000 (08:41 -0400)]
fs/namei.c: Add hashlen_string() function

We'd like to make more use of the highly-optimized dcache hash functions
throughout the kernel, rather than have every subsystem create its own,
and a function that hashes basic null-terminated strings is required
for that.

(The name is to emphasize that it returns both hash and length.)

It's actually useful in the dcache itself, specifically d_alloc_name().
Other uses in the next patch.

full_name_hash() is also tweaked to make it more generally useful:
1) Take a "char *" rather than "unsigned char *" argument, to
   be consistent with hash_name().
2) Handle zero-length inputs.  If we want more callers, we don't want
   to make them worry about corner cases.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
8 years agoPull out string hash to <linux/stringhash.h>
George Spelvin [Fri, 20 May 2016 11:26:00 +0000 (07:26 -0400)]
Pull out string hash to <linux/stringhash.h>

... so they can be used without the rest of <linux/dcache.h>

The hashlen_* macros will make sense next patch.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
8 years agoMerge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 28 May 2016 19:38:50 +0000 (12:38 -0700)]
Merge branch 'i2c/for-next' of git://git./linux/kernel/git/wsa/linux

Pull i2c fix from Wolfram Sang:
 "A fix for a regression introduced yesterday.

  The regression didn't show up here locally because I did not have
  PAGE_POISONING enabled.  And buildbots discovered this only after it
  hit your tree.  Thanks to Dan for the quick response"

* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: dev: use after free in detach

8 years agoMerge tag 'chrome-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/olof...
Linus Torvalds [Sat, 28 May 2016 19:32:01 +0000 (12:32 -0700)]
Merge tag 'chrome-platform' of git://git./linux/kernel/git/olof/chrome-platform

Pull chrome platform updates from Olof Johansson
 "A handful of Chrome driver and binding changes this merge window:

   - a few patches to fix probing and configuration of pstore

   - a few patches adding Elan touchpad registration on a few devices

   - EC changes: a security fix dealing with max message sizes and
     addition of compat_ioctl support.

   - keyboard backlight control support

  There was also an accidential duplicate registration of trackpads on
  'Leon', which was reverted just recently"

* tag 'chrome-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform:
  Revert "platform/chrome: chromeos_laptop: Add Leon Touch"
  platform/chrome: chromeos_laptop - Add Elan touchpad for Wolf
  platform/chrome: chromeos_laptop - Add elan trackpad option for C720
  platform/chrome: cros_ec_dev - Populate compat_ioctl
  platform/chrome: cros_ec_lightbar - use name instead of ID to hide lightbar attributes
  platform/chrome: cros_ec_dev - Fix security issue
  platform/chrome: Add Chrome OS keyboard backlight LEDs support
  platform/chrome: use to_platform_device()
  platform/chrome: pstore: Move to larger record size.
  platform/chrome: pstore: probe for ramoops buffer using acpi
  platform/chrome: chromeos_laptop: Add Leon Touch

8 years agoMerge tag 'sound-4.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Sat, 28 May 2016 19:23:12 +0000 (12:23 -0700)]
Merge tag 'sound-4.7-rc1-2' of git://git./linux/kernel/git/tiwai/sound

Pull more sound updates from Takashi Iwai:
 "This is the second update round for 4.7-rc1.  Most of changes are
  about the pending ASoC updates and fixes, including a few new drivers.
  Below are some highlights:

  ASoC:
   - New drivers for MAX98371 and TAS5720
   - SPI support for TLV320AIC32x4, along with the module split
   - TDM support for STI Uniperf IPs
   - Remaining topology API fixes / updates

  HDA:
   - A couple of Dell quirks and new Realtek codec support"

* tag 'sound-4.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (63 commits)
  ALSA: hda - Fix headset mic detection problem for one Dell machine
  spi: spi-ep93xx: Fix the PTR_ERR() argument
  ALSA: hda/realtek - Add support for ALC295/ALC3254
  ASoC: kirkwood: fix build failure
  ALSA: hda - Fix headphone noise on Dell XPS 13 9360
  ASoC: ak4642: Enable cache usage to fix crashes on resume
  ASoC: twl6040: Disconnect AUX output pads on digital mute
  ASoC: tlv320aic32x4: Properly implement the positive and negative pins into the mixers
  rcar: src: skip disabled-SRC nodes
  ASoC: max98371 Remove duplicate entry in max98371_reg
  ASoC: twl6040: Select LPPLL during standby
  ASoC: rsnd: don't use prohibited number to PDMACHCRn.SRS
  ASoC: simple-card: Add pm callbacks to platform driver
  ASoC: pxa: Fix module autoload for platform drivers
  ASoC: topology: Fix memory leak in widget creation
  ASoC: Add max98371 codec driver
  ASoC: rsnd: count .probe/.remove for rsnd_mod_call()
  ASoC: topology: Check size mismatch of ABI objects before parsing
  ASoC: topology: Check failure to create a widget
  ASoC: add support for TAS5720 digital amplifier
  ...

8 years agoMerge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
Linus Torvalds [Sat, 28 May 2016 19:04:17 +0000 (12:04 -0700)]
Merge branch 'for-next' of git://git./linux/kernel/git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "Here are the outstanding target pending updates for v4.7-rc1.

  The highlights this round include:

   - Allow external PR/ALUA metadata path be defined at runtime via top
     level configfs attribute (Lee)
   - Fix target session shutdown bug for ib_srpt multi-channel (hch)
   - Make TFO close_session() and shutdown_session() optional (hch)
   - Drop se_sess->sess_kref + convert tcm_qla2xxx to internal kref
     (hch)
   - Add tcm_qla2xxx endpoint attribute for basic FC jammer (Laurence)
   - Refactor iscsi-target RX/TX PDU encode/decode into common code
     (Varun)
   - Extend iscsit_transport with xmit_pdu, release_cmd, get_rx_pdu,
     validate_parameters, and get_r2t_ttt for generic ISO offload
     (Varun)
   - Initial merge of cxgb iscsi-segment offload target driver (Varun)

  The bulk of the changes are Chelsio's new driver, along with a number
  of iscsi-target common code improvements made by Varun + Co along the
  way"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (29 commits)
  iscsi-target: Fix early sk_data_ready LOGIN_FLAGS_READY race
  cxgbit: Use type ISCSI_CXGBIT + cxgbit tpg_np attribute
  iscsi-target: Convert transport drivers to signal rdma_shutdown
  iscsi-target: Make iscsi_tpg_np driver show/store use generic code
  tcm_qla2xxx Add SCSI command jammer/discard capability
  iscsi-target: graceful disconnect on invalid mapping to iovec
  target: need_to_release is always false, remove redundant check and kfree
  target: remove sess_kref and ->shutdown_session
  iscsi-target: remove usage of ->shutdown_session
  tcm_qla2xxx: introduce a private sess_kref
  target: make close_session optional
  target: make ->shutdown_session optional
  target: remove acl_stop
  target: consolidate and fix session shutdown
  cxgbit: add files for cxgbit.ko
  iscsi-target: export symbols
  iscsi-target: call complete on conn_logout_comp
  iscsi-target: clear tx_thread_active
  iscsi-target: add new offload transport type
  iscsi-target: use conn_transport->transport_type in text rsp
  ...

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 28 May 2016 18:04:16 +0000 (11:04 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull more rdma updates from Doug Ledford:
 "This is the second group of code for the 4.7 merge window.  It looks
  large, but only in one sense.  I'll get to that in a minute.  The list
  of changes here breaks down as follows:

   - Dynamic counter infrastructure in the IB drivers

     This is a sysfs based code to allow free form access to the
     hardware counters RDMA devices might support so drivers don't need
     to code this up repeatedly themselves

   - SendOnlyFullMember multicast support

   - IB router support

   - A couple misc fixes

   - The big item on the list: hfi1 driver updates, plus moving the hfi1
     driver out of staging

  There was a group of 15 patches in the hfi1 list that I thought I had
  in the first pull request but they weren't.  So that added to the
  length of the hfi1 section here.

  As far as these go, everything but the hfi1 is pretty straight
  forward.

  The hfi1 is, if you recall, the driver that Al had complaints about
  how it used the write/writev interfaces in an overloaded fashion.  The
  write portion of their interface behaved like the write handler in the
  IB stack proper and did bi-directional communications.  The writev
  interface, on the other hand, only accepts SDMA request structures.
  The completions for those structures are sent back via an entirely
  different event mechanism.

  With the security patch, we put security checks on the write
  interface, however, we also knew they would be going away soon.  Now,
  we've converted the write handler in the hfi1 driver to use ioctls
  from the IB reserved magic area for its bidirectional communications.
  With that change, Intel has addressed all of the items originally on
  their TODO when they went into staging (as well as many items added to
  the list later).

  As such, I moved them out, and since they were the last item in the
  staging/rdma directory, and I don't have immediate plans to use the
  staging area again, I removed the staging/rdma area.

  Because of the move out of staging, as well as a series of 5 patches
  in the hfi1 driver that removed code people thought should be done in
  a different way and was optional to begin with (a snoop debug
  interface, an eeprom driver for an eeprom connected directory to their
  hfi1 chip and not via an i2c bus, and a few other things like that),
  the line count, especially the removal count, is high"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (56 commits)
  staging/rdma: Remove the entire rdma subdirectory of staging
  IB/core: Make device counter infrastructure dynamic
  IB/hfi1: Fix pio map initialization
  IB/hfi1: Correct 8051 link parameter settings
  IB/hfi1: Update pkey table properly after link down or FM start
  IB/rdamvt: Fix rdmavt s_ack_queue sizing
  IB/rdmavt: Max atomic value should be a u8
  IB/hfi1: Fix hard lockup due to not using save/restore spin lock
  IB/hfi1: Add tracing support for send with invalidate opcode
  IB/hfi1, qib: Add ieth to the packet header definitions
  IB/hfi1: Move driver out of staging
  IB/hfi1: Do not free hfi1 cdev parent structure early
  IB/hfi1: Add trace message in user IOCTL handling
  IB/hfi1: Remove write(), use ioctl() for user cmds
  IB/hfi1: Add ioctl() interface for user commands
  IB/hfi1: Remove unused user command
  IB/hfi1: Remove snoop/diag interface
  IB/hfi1: Remove EPROM functionality from data device
  IB/hfi1: Remove UI char device
  IB/hfi1: Remove multiple device cdev
  ...

8 years agoRevert "platform/chrome: chromeos_laptop: Add Leon Touch"
Benson Leung [Sat, 28 May 2016 15:25:33 +0000 (08:25 -0700)]
Revert "platform/chrome: chromeos_laptop: Add Leon Touch"

This reverts commit bff3c624dc7261a084a4d25a0b09c3fb0fec872a.

Board "Leon" is otherwise known as "Toshiba CB35" and we already have
the entry that supports that board as of this commit :
963cb6f platform/chrome: chromeos_laptop - Add Toshiba CB35 Touch

Remove this duplicate.

Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
8 years agoi2c: dev: use after free in detach
Dan Carpenter [Sat, 28 May 2016 05:01:46 +0000 (08:01 +0300)]
i2c: dev: use after free in detach

The call to put_i2c_dev() frees "i2c_dev" so there is a use after
free when we call cdev_del(&i2c_dev->cdev).

Fixes: d6760b14d4a1 ('i2c: dev: switch from register_chrdev to cdev API')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
8 years agoMIPS: Add missing FROZEN hotplug notifier transitions
Anna-Maria Gleixner [Tue, 24 May 2016 13:08:47 +0000 (15:08 +0200)]
MIPS: Add missing FROZEN hotplug notifier transitions

The corresponding FROZEN hotplug notifier transitions used on
suspend/resume are ignored. Therefore the switch case action argument
is masked with the frozen hotplug notifier transition mask.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: rt@linutronix.de
Patchwork: https://patchwork.linux-mips.org/patch/13351/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Build microMIPS VDSO for microMIPS kernels
James Hogan [Tue, 24 May 2016 08:35:11 +0000 (09:35 +0100)]
MIPS: Build microMIPS VDSO for microMIPS kernels

MicroMIPS kernels may be expected to run on microMIPS only cores which
don't support the normal MIPS instruction set, so be sure to pass the
-mmicromips flag through to the VDSO cflags.

Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.4.x-
Patchwork: https://patchwork.linux-mips.org/patch/13349/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Fix sigreturn via VDSO on microMIPS kernel
James Hogan [Tue, 24 May 2016 08:35:10 +0000 (09:35 +0100)]
MIPS: Fix sigreturn via VDSO on microMIPS kernel

In microMIPS kernels, handle_signal() sets the isa16 mode bit in the
vdso address so that the sigreturn trampolines (which are offset from
the VDSO) get executed as microMIPS.

However commit ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
changed the offsets to come from the VDSO image, which already have the
isa16 mode bit set correctly since they're extracted from the VDSO
shared library symbol table.

Drop the isa16 mode bit handling from handle_signal() to fix sigreturn
for cores which support both microMIPS and normal MIPS. This doesn't fix
microMIPS only cores, since the VDSO is still built for normal MIPS, but
thats a separate problem.

Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.4.x-
Patchwork: https://patchwork.linux-mips.org/patch/13348/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: devicetree: fix cpu interrupt controller node-names
Antony Pavlov [Mon, 23 May 2016 11:39:00 +0000 (14:39 +0300)]
MIPS: devicetree: fix cpu interrupt controller node-names

Here is the quote from [1]:

    The unit-address must match the first address specified
    in the reg property of the node. If the node has no reg property,
    the @ and unit-address must be omitted and the node-name alone
    differentiates the node from other nodes at the same level

This patch adjusts MIPS dts-files and devicetree binding
documentation in accordance with [1].

    [1] Power.org(tm) Standard for Embedded Power Architecture(tm)
        Platform Requirements (ePAPR). Version 1.1 – 08 April 2011.
        Chapter 2.2.1.1 Node Name Requirements

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13345/
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: VDSO: Build with `-fno-strict-aliasing'
Maciej W. Rozycki [Thu, 26 May 2016 11:55:45 +0000 (12:55 +0100)]
MIPS: VDSO: Build with `-fno-strict-aliasing'

Avoid an aliasing issue causing a build error in VDSO:

In file included from include/linux/srcu.h:34:0,
                 from include/linux/notifier.h:15,
                 from ./arch/mips/include/asm/uprobes.h:9,
                 from include/linux/uprobes.h:61,
                 from include/linux/mm_types.h:13,
                 from ./arch/mips/include/asm/vdso.h:14,
                 from arch/mips/vdso/vdso.h:27,
                 from arch/mips/vdso/gettimeofday.c:11:
include/linux/workqueue.h: In function 'work_static':
include/linux/workqueue.h:186:2: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
  return *work_data_bits(work) & WORK_STRUCT_STATIC;
  ^
cc1: all warnings being treated as errors
make[2]: *** [arch/mips/vdso/gettimeofday.o] Error 1

with a CONFIG_DEBUG_OBJECTS_WORK configuration and GCC 5.2.0.  Include
`-fno-strict-aliasing' along with compiler options used, as required for
kernel code, fixing a problem present since the introduction of VDSO
with commit ebb5e78cc634 ("MIPS: Initial implementation of a VDSO").

Thanks to Tejun for diagnosing this properly!

Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.3+
Patchwork: https://patchwork.linux-mips.org/patch/13357/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Pistachio: Enable KASLR
Matt Redfearn [Wed, 25 May 2016 11:58:40 +0000 (12:58 +0100)]
MIPS: Pistachio: Enable KASLR

Allow KASLR to be selected on Pistachio based systems. Tested on a
Creator Ci40.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13356/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: lib: Mark intrinsics notrace
Harvey Hunt [Wed, 25 May 2016 10:06:35 +0000 (11:06 +0100)]
MIPS: lib: Mark intrinsics notrace

On certain MIPS32 devices, the ftrace tracer "function_graph" uses
__lshrdi3() during the capturing of trace data. ftrace then attempts to
trace __lshrdi3() which leads to infinite recursion and a stack overflow.
Fix this by marking __lshrdi3() as notrace. Mark the other compiler
intrinsics as notrace in case the compiler decides to use them in the
ftrace path.

Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Cc: <linux-mips@linux-mips.org>
Cc: <linux-kernel@vger.kernel.org>
Cc: <stable@vger.kernel.org> # 4.2.x-
Patchwork: https://patchwork.linux-mips.org/patch/13354/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Fix 64-bit HTW configuration
James Hogan [Fri, 27 May 2016 21:25:23 +0000 (22:25 +0100)]
MIPS: Fix 64-bit HTW configuration

The Hardware page Table Walker (HTW) is being misconfigured on 64-bit
kernels. The PWSize.PS (pointer size) bit determines whether pointers
within directories are loaded as 32-bit or 64-bit addresses, but was
never being set to 1 for 64-bit kernels where the unsigned long in pgd_t
is 64-bits wide.

This actually reduces rather than improves performance when the HTW is
enabled on P6600 since the HTW is initiated lots, but walks are all
aborted due I think to bad intermediate pointers.

Since we were already taking the width of the PTEs into account by
setting PWSize.PTEW, which is the left shift applied to the page table
index *in addition to* the native pointer size, we also need to reduce
PTEW by 1 when PS=1. This is done by calculating PTEW based on the
relative size of pte_t compared to pgd_t.

Finally in order for the HTW to be used when PS=1, the appropriate
XK/XS/XU bits corresponding to the different 64-bit segments need to be
set in PWCtl. We enable only XU for now to enable walking for XUSeg.

Supporting walking for XKSeg would be a bit more involved so is left for
a future patch. It would either require the use of a per-CPU top level
base directory if supported by the HTW (a bit like pgd_current but with
a second entry pointing at swapper_pg_dir), or the HTW would prepend bit
63 of the address to the global directory index which doesn't really
match how we split user and kernel page directories.

Fixes: cab25bc7537b ("MIPS: Extend hardware table walking support to MIPS64")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13364/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Add 64-bit HTW fields
James Hogan [Fri, 27 May 2016 21:25:22 +0000 (22:25 +0100)]
MIPS: Add 64-bit HTW fields

Add field definitions for some of the 64-bit specific Hardware page
Table Walker (HTW) register fields in PWSize and PWCtl, in preparation
for fixing the 64-bit HTW configuration.

Also print these fields out along with the others in print_htw_config().

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13363/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMAINTAINERS: Add file patterns for mips device tree bindings
Geert Uytterhoeven [Sun, 22 May 2016 09:06:07 +0000 (11:06 +0200)]
MAINTAINERS: Add file patterns for mips device tree bindings

Submitters of device tree binding documentation may forget to CC
the subsystem maintainer if this is missing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13340/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMAINTAINERS: Add file patterns for mips brcm device tree bindings
Geert Uytterhoeven [Sun, 22 May 2016 09:05:45 +0000 (11:05 +0200)]
MAINTAINERS: Add file patterns for mips brcm device tree bindings

Submitters of device tree binding documentation may forget to CC
the subsystem maintainer if this is missing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13339/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Simplify DSP instruction encoding macros
James Hogan [Fri, 20 May 2016 22:28:41 +0000 (23:28 +0100)]
MIPS: Simplify DSP instruction encoding macros

Simplify the DSP instruction wrapper macros which use explicit encodings
for microMIPS and normal MIPS by using the new encoding macros and
removing duplication.

To me this makes it easier to read since it is much shorter, but it also
ensures .insn is used, preventing objdump disassembling the microMIPS
code as normal MIPS.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13314/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Add missing tlbinvf/XPA microMIPS encodings
James Hogan [Fri, 20 May 2016 22:28:40 +0000 (23:28 +0100)]
MIPS: Add missing tlbinvf/XPA microMIPS encodings

Hardcoded MIPS instruction encodings are provided for tlbinvf, mfhc0 &
mthc0 instructions, but microMIPS encodings are missing. I doubt any
microMIPS cores exist at present which support these instructions, but
the microMIPS encodings exist, and microMIPS cores may support them in
the future. Add the missing microMIPS encodings using the new macros.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13313/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Fix little endian microMIPS MSA encodings
James Hogan [Fri, 20 May 2016 22:28:39 +0000 (23:28 +0100)]
MIPS: Fix little endian microMIPS MSA encodings

When the toolchain doesn't support MSA we encode MSA instructions
explicitly in assembly. Unfortunately we use .word for both MIPS and
microMIPS encodings which is wrong, since 32-bit microMIPS instructions
are made up from a pair of halfwords.

- The most significant halfword always comes first, so for little endian
  builds the halves will be emitted in the wrong order.

- 32-bit alignment isn't guaranteed, so the assembler may insert a
  16-bit nop instruction to pad the instruction stream to a 32-bit
  boundary.

Use the new instruction encoding macros to encode microMIPS MSA
instructions correctly.

Fixes: d96cc3d1ec5d ("MIPS: Add microMIPS MSA support.")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <Paul.Burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13312/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Add missing VZ accessor microMIPS encodings
James Hogan [Fri, 20 May 2016 22:28:38 +0000 (23:28 +0100)]
MIPS: Add missing VZ accessor microMIPS encodings

Toolchains may be used which support microMIPS but not VZ instructions
(i.e. binutis 2.22 & 2.23), so extend the explicitly encoded versions of
the guest COP0 register & guest TLB access macros to support microMIPS
encodings too, using the new macros.

This prevents non-microMIPS instructions being executed in microMIPS
mode during CPU probe on cores supporting VZ (e.g. M5150), which cause
reserved instruction exceptions early during boot.

Fixes: bad50d79255a ("MIPS: Fix VZ probe gas errors with binutils <2.24")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13311/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Add inline asm encoding helpers
James Hogan [Fri, 20 May 2016 22:28:37 +0000 (23:28 +0100)]
MIPS: Add inline asm encoding helpers

To allow simplification of macros which use inline assembly to
explicitly encode instructions, add a few simple abstractions to
mipsregs.h which expand to specific microMIPS or normal MIPS encodings
depending on what type of kernel is being built:

_ASM_INSN_IF_MIPS(_enc) : Emit a 32bit MIPS instruction if microMIPS is
                          not enabled.
_ASM_INSN32_IF_MM(_enc) : Emit a 32bit microMIPS instruction if enabled.
_ASM_INSN16_IF_MM(_enc) : Emit a 16bit microMIPS instruction if enabled.

The macros can be used one after another since the MIPS / microMIPS
macros are mutually exclusive, for example:

__asm__ __volatile__(
        ".set push\n\t"
        ".set noat\n\t"
        "# mfgc0 $1, $%1, %2\n\t"
        _ASM_INSN_IF_MIPS(0x40610000 | %1 << 11 | %2)
        _ASM_INSN32_IF_MM(0x002004fc | %1 << 16 | %2 << 11)
        "move %0, $1\n\t"
        ".set pop"
        : "=r" (__res)
        : "i" (source), "i" (sel));

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13310/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Spelling fix lets -> let's
Ralf Baechle [Sat, 21 May 2016 22:39:18 +0000 (00:39 +0200)]
MIPS: Spelling fix lets -> let's

As noticed by Sergei in the discussion of Andrea Gelmini's patch series.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
8 years agoMIPS: VR41xx: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:02:26 +0000 (14:02 +0200)]
MIPS: VR41xx: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13338/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: oprofile: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:57 +0000 (14:01 +0200)]
MIPS: oprofile: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: rric@kernel.org
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Cc: oprofile-list@lists.sf.net
Patchwork: https://patchwork.linux-mips.org/patch/13334/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: math-emu: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:51 +0000 (14:01 +0200)]
MIPS: math-emu: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: macro@imgtec.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13333/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: lib: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:36 +0000 (14:01 +0200)]
MIPS: lib: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13331/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: kernel: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:27 +0000 (14:01 +0200)]
MIPS: kernel: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: paul.burton@imgtec.com
Cc: macro@imgtec.com
Cc: james.hogan@imgtec.com
Cc: jslaby@suse.cz
Cc: adam.buchbinder@gmail.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13330/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: R6: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:20 +0000 (14:01 +0200)]
MIPS: R6: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: macro@imgtec.com
Cc: paul.burton@imgtec.com
Cc: Leonid.Yegoshin@imgtec.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13329/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: IP22/IP28: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:01:12 +0000 (14:01 +0200)]
MIPS: IP22/IP28: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: adam.buchbinder@gmail.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13328/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Cavium: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:40 +0000 (14:00 +0200)]
MIPS: Cavium: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: david.daney@cavium.com
Cc: janne.huttunen@nokia.com
Cc: aaro.koskinen@nokia.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13324/
Patchwork: https://patchwork.linux-mips.org/patch/13325/
Patchwork: https://patchwork.linux-mips.org/patch/13326/
Patchwork: https://patchwork.linux-mips.org/patch/13327/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: MT: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:33 +0000 (14:00 +0200)]
MIPS: MT: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13323/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Loongson64: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:26 +0000 (14:00 +0200)]
MIPS: Loongson64: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: chenhc@lemote.com
Cc: viresh.kumar@linaro.org
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13322/
Patchwork: https://patchwork.linux-mips.org/patch/13332/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: IP32: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:18 +0000 (14:00 +0200)]
MIPS: IP32: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13321/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: IP27: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:11 +0000 (14:00 +0200)]
MIPS: IP27: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13320/
Patchwork: https://patchwork.linux-mips.org/patch/13335/
Patchwork: https://patchwork.linux-mips.org/patch/13336/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: BCM63xx: Fix typo
Andrea Gelmini [Sat, 21 May 2016 12:00:04 +0000 (14:00 +0200)]
MIPS: BCM63xx: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13319/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Alchemy: Fix typo
Andrea Gelmini [Sat, 21 May 2016 11:59:56 +0000 (13:59 +0200)]
MIPS: Alchemy: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13318/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: hazards.h: Fix typo
Andrea Gelmini [Sat, 21 May 2016 11:59:48 +0000 (13:59 +0200)]
MIPS: hazards.h: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: chenhc@lemote.com
Cc: james.hogan@imgtec.com
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13317/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Lasat: A couple off by one bugs in picvue_proc.c
Dan Carpenter [Fri, 8 Nov 2013 09:44:31 +0000 (12:44 +0300)]
MIPS: Lasat: A couple off by one bugs in picvue_proc.c

These should be ">=" instead of ">" or we go past the end of the
pvc_lines[] array.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: linux-mips@linux-mips.org
Cc: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6124/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: ralink: add MT7628 EPHY LEDs pinmux support
Álvaro Fernández Rojas [Thu, 19 May 2016 20:07:36 +0000 (22:07 +0200)]
MIPS: ralink: add MT7628 EPHY LEDs pinmux support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13308/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: ralink: fix MT7628 wled_an pinmux gpio
Álvaro Fernández Rojas [Thu, 19 May 2016 20:07:35 +0000 (22:07 +0200)]
MIPS: ralink: fix MT7628 wled_an pinmux gpio

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13307/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: ralink: fix MT7628 pinmux typos
Álvaro Fernández Rojas [Thu, 19 May 2016 20:07:34 +0000 (22:07 +0200)]
MIPS: ralink: fix MT7628 pinmux typos

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13306/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Fix write_gc0_* macros when writing zero
James Hogan [Wed, 18 May 2016 16:04:38 +0000 (17:04 +0100)]
MIPS: Fix write_gc0_* macros when writing zero

The versions of the __write_{32,64}bit_gc0_register() macros for when
there is no virt support in the assembler use the "J" inline asm
constraint to allow integer zero, but this needs to be accompanied by
the "z" formatting string so that it turns into $0. Fix both macros to
do this.

Fixes: bad50d79255a ("MIPS: Fix VZ probe gas errors with binutils <2.24")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13289/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: CPS: Copy EVA configuration when starting secondary VPs.
Matt Redfearn [Wed, 18 May 2016 16:12:36 +0000 (17:12 +0100)]
MIPS: CPS: Copy EVA configuration when starting secondary VPs.

When starting secondary VPEs which support EVA and the SegCtl registers,
copy the memory segmentation configuration from the running VPE to ensure
that all VPEs in the core have a consistent virtual memory map.

The EVA configuration of secondary cores is dealt with when starting the
core via the CM.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13291/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Add definitions of SegCtl registers and use them
Matt Redfearn [Wed, 18 May 2016 16:12:35 +0000 (17:12 +0100)]
MIPS: Add definitions of SegCtl registers and use them

The SegCtl registers are standard for MIPSr3..MIPSr5. Add definitions of
these registers and use them rather than constants

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Chris Packham <judge.packham@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13290/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 gpio.
Purna Chandra Mandal [Tue, 17 May 2016 05:06:00 +0000 (10:36 +0530)]
dt/bindings: Correct clk binding example for PIC32 gpio.

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: linux-gpio@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13270/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 WDT.
Purna Chandra Mandal [Tue, 17 May 2016 05:05:59 +0000 (10:35 +0530)]
dt/bindings: Correct clk binding example for PIC32 WDT.

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13269/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 DMT.
Purna Chandra Mandal [Tue, 17 May 2016 05:05:58 +0000 (10:35 +0530)]
dt/bindings: Correct clk binding example for PIC32 DMT.

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13268/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 serial.
Purna Chandra Mandal [Tue, 17 May 2016 05:05:57 +0000 (10:35 +0530)]
dt/bindings: Correct clk binding example for PIC32 serial.

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Cc: Andrei Pistirica <andrei.pistirica@microchip.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13267/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 pinctrl
Purna Chandra Mandal [Tue, 17 May 2016 05:05:56 +0000 (10:35 +0530)]
dt/bindings: Correct clk binding example for PIC32 pinctrl

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13266/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agodt/bindings: Correct clk binding example for PIC32 SDHCI
Purna Chandra Mandal [Tue, 17 May 2016 05:05:55 +0000 (10:35 +0530)]
dt/bindings: Correct clk binding example for PIC32 SDHCI

Update binding example based on new clock binding documentation.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Cc: Andrei Pistirica <andrei.pistirica@microchip.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13265/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Fix incomplete separation of XPA CPU feature
James Hogan [Tue, 17 May 2016 23:08:49 +0000 (00:08 +0100)]
MIPS: Fix incomplete separation of XPA CPU feature

Commit 12822570a29b ("MIPS: Separate XPA CPU feature into LPA and MVH")
wasn't fully applied, possibly due to a conflict with commit
f270d881fa55 ("MIPS: Detect MIPSr6 Virtual Processor support"). This
left decode_config5() referring to the non-existent MIPS_CPU_XPA, which
breaks the build when XPA is enabled:

arch/mips/kernel/cpu-probe.c In function ‘decode_config5’:
arch/mips/kernel/cpu-probe.c:838:17: error: ‘MIPS_CPU_XPA’ undeclared (first use in this function)
   c->options |= MIPS_CPU_XPA;
                    ^

Apply the missing hunk, dropping the CONFIG_XPA ifdef and setting the
MIPS_CPU_MVH option when Config5.MVH is set.

Fixes: 12822570a29b ("MIPS: Separate XPA CPU feature into LPA and MVH")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Link: https://patchwork.linux-mips.org/patch/13112/
Patchwork: https://patchwork.linux-mips.org/patch/13277/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoirqchip: mips-gic: Setup EIC mode on each CPU if it's in use
Paul Burton [Tue, 17 May 2016 14:31:06 +0000 (15:31 +0100)]
irqchip: mips-gic: Setup EIC mode on each CPU if it's in use

When EIC mode is in use (cpu_has_veic is true) enable it on each CPU
during GIC initialisation. Otherwise there may be a mismatch between the
hardware default interrupt model & that expected by the kernel.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13274/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: smp-cps: Clear Status IPL field when using EIC
Paul Burton [Tue, 17 May 2016 14:31:05 +0000 (15:31 +0100)]
MIPS: smp-cps: Clear Status IPL field when using EIC

When using an external interrupt controller (EIC) the interrupt mask
bits in the cop0 Status register are reused for the Interrupt Priority
Level, and any interrupts with a priority lower than the field will be
ignored. Clear the field to 0 by default such that all interrupts are
serviced.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Qais Yousef <qsyousef@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13273/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMIPS: Clear Status IPL field when using EIC
Paul Burton [Tue, 17 May 2016 14:31:04 +0000 (15:31 +0100)]
MIPS: Clear Status IPL field when using EIC

When using an external interrupt controller (EIC) the interrupt mask
bits in the cop0 Status register are reused for the Interrupt Priority
Level, and any interrupts with a priority lower than the field will be
ignored. Clear the field to 0 by default such that all interrupts are
serviced. Without doing so we default to arbitrarily ignoring all or
some subset of interrupts.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Joe Perches <joe@perches.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13272/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 28 May 2016 02:14:35 +0000 (19:14 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull more input subsystem updates from Dmitry Torokhov:
 "Just a few more driver fixes; new drivers will be coming in the next
  merge window"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: pwm-beeper - fix - scheduling while atomic
  Input: xpad - xbox one elite controller support
  Input: xpad - add more third-party controllers
  Input: xpad - prevent spurious input from wired Xbox 360 controllers
  Input: xpad - move pending clear to the correct location
  Input: uinput - handle compat ioctl for UI_SET_PHYS