linux-stable.git/arch/mips, branch v4.14.2

MIPS: AR7: Ensure that serial ports are properly set up

2017-11-08T14:57:55+00:00

Without UPF_FIXED_TYPE, the data from the PORT_AR7 uart_config entry is
never copied, resulting in a dead port.

Fixes: 154615d55459 ("MIPS: AR7: Use correct UART port type")
Signed-off-by: Oswald Buddenhagen 
[jonas.gorski: add Fixes tag]
Signed-off-by: Jonas Gorski 
Reviewed-by: Florian Fainelli 
Cc: Ralf Baechle 
Cc: Greg Kroah-Hartman 
Cc: Yoshihiro YUNOMAE 
Cc: Nicolas Schichan 
Cc: Oswald Buddenhagen 
Cc: linux-mips@linux-mips.org
Cc: linux-serial@vger.kernel.org
Cc: 
Patchwork: https://patchwork.linux-mips.org/patch/17543/
Signed-off-by: James Hogan

MIPS: AR7: Defer registration of GPIO

2017-11-08T12:44:26+00:00

When called from prom init code, ar7_gpio_init() will fail as it will
call gpiochip_add() which relies on a working kmalloc() to alloc
the gpio_desc array and kmalloc is not useable yet at prom init time.

Move ar7_gpio_init() to ar7_register_devices() (a device_initcall)
where kmalloc works.

Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array")
Signed-off-by: Jonas Gorski 
Reviewed-by: Florian Fainelli 
Cc: Ralf Baechle 
Cc: Greg Kroah-Hartman 
Cc: Yoshihiro YUNOMAE 
Cc: Nicolas Schichan 
Cc: linux-mips@linux-mips.org
Cc: linux-serial@vger.kernel.org
Cc:  # 3.19+
Patchwork: https://patchwork.linux-mips.org/patch/17542/
Signed-off-by: James Hogan

MIPS: BMIPS: Fix missing cbr address

2017-11-07T21:28:19+00:00

Fix NULL pointer access in BMIPS3300 RAC flush.

Fixes: 738a3f79027b ("MIPS: BMIPS: Add early CPU initialization code")
Signed-off-by: Jaedon Shin 
Reviewed-by: Florian Fainelli 
Cc: Kevin Cernekee 
Cc: linux-mips@linux-mips.org
Cc:  # 4.7+
Patchwork: https://patchwork.linux-mips.org/patch/16423/
Signed-off-by: James Hogan

Merge tag 'mips_fixes_4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

2017-11-04T18:31:02+00:00

Pull MIPS fixes from James Hogan:
 "A selection of important MIPS fixes for 4.14, and some MAINTAINERS /
  email address updates:

  Maintainership updates:
   - imgtec.com -> mips.com email addresses (this trivially updates
     comments in quite a few files, as well as MAINTAINERS)
   - Pistachio SoC maintainership update

  Fixes:
   - NI 169445 build (new platform in 4.14)
   - EVA regression (4.14)
   - SMP-CPS build & preemption regressions (4.14)
   - SMP/hotplug deadlock & race (deadlock reintroduced 4.13)
   - ebpf_jit error return (4.13)
   - SMP-CMP build regressions (4.11 and 4.14)
   - bad UASM microMIPS encoding (3.16)
   - CM definitions (3.15)"

[ I had taken the email address updates separately, because I didn't
  expect James to send a pull request, so those got applied twice.   - Linus]

* tag 'mips_fixes_4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
  MIPS: Update email address for Marcin Nowakowski
  MIPS: smp-cmp: Fix vpe_id build error
  MAINTAINERS: Update Pistachio platform maintainers
  MIPS: smp-cmp: Use right include for task_struct
  MIPS: Update Goldfish RTC driver maintainer email address
  MIPS: Update RINT emulation maintainer email address
  MIPS: CPS: Fix use of current_cpu_data in preemptible code
  MIPS: SMP: Fix deadlock & online race
  MIPS: bpf: Fix a typo in build_one_insn()
  MIPS: microMIPS: Fix incorrect mask in insn_table_MM
  MIPS: Fix CM region target definitions
  MIPS: generic: Fix compilation error from include asm/mips-cpc.h
  MIPS: Fix exception entry when CONFIG_EVA enabled
  MIPS: generic: Fix NI 169445 its build
  Update MIPS email addresses

Update MIPS email addresses

2017-11-03T16:02:30+00:00

MIPS will soon not be a part of Imagination Technologies, and as such
many @imgtec.com email addresses will no longer be valid. This patch
updates the addresses for those who:

 - Have 10 or more patches in mainline authored using an @imgtec.com
   email address, or any patches dated within the past year.

 - Are still with Imagination but leaving as part of the MIPS business
   unit, as determined from an internal email address list.

 - Haven't already updated their email address (ie. JamesH) or expressed
   a desire to be excluded (ie. Maciej).

 - Acked v2 or earlier of this patch, which leaves Deng-Cheng, Matt &
   myself.

New addresses are of the form firstname.lastname@mips.com, and all
verified against an internal email address list.  An entry is added to
.mailmap for each person such that get_maintainer.pl will report the new
addresses rather than @imgtec.com addresses which will soon be dead.

Instances of the affected addresses throughout the tree are then
mechanically replaced with the new @mips.com address.

Signed-off-by: Paul Burton 
Cc: Deng-Cheng Zhu 
Cc: Deng-Cheng Zhu 
Acked-by: Dengcheng Zhu 
Cc: Matt Redfearn 
Cc: Matt Redfearn 
Acked-by: Matt Redfearn 
Cc: Andrew Morton 
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Signed-off-by: Linus Torvalds

MIPS: Update email address for Marcin Nowakowski

2017-11-02T10:58:43+00:00

MIPS is no longer part of Imagination Technologies and my @imgtec.com
address will soon stop working. Update any files containing my address
as well as the .mailmap to point to my new @mips.com address.

Signed-off-by: Marcin Nowakowski 
Patchwork: https://patchwork.linux-mips.org/patch/17579/
Signed-off-by: James Hogan

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02T10:20:11+00:00

Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be.  This makes it hard for
compliance tools to determine the correct license.

Update these files with an SPDX license identifier.  The identifier was
chosen based on the license information in the file.

GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.

Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier.  The format
is:
        ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)

SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text.  The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart 
Reviewed-by: Philippe Ombredanne 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02T10:19:54+00:00

Many user space API headers are missing licensing information, which
makes it hard for compliance tools to determine the correct license.

By default are files without license information under the default
license of the kernel, which is GPLV2.  Marking them GPLV2 would exclude
them from being included in non GPLV2 code, which is obviously not
intended. The user space API headers fall under the syscall exception
which is in the kernels COPYING file:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

otherwise syscall usage would not be possible.

Update the files which contain no license information with an SPDX
license identifier.  The chosen identifier is 'GPL-2.0 WITH
Linux-syscall-note' which is the officially assigned identifier for the
Linux syscall exception.  SPDX license identifiers are a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart 
Reviewed-by: Philippe Ombredanne 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02T10:10:55+00:00

Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart 
Reviewed-by: Philippe Ombredanne 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

MIPS: smp-cmp: Fix vpe_id build error

2017-11-01T23:23:00+00:00

The smp-cmp build has been (further) broken since commit 856fbcee6099
("MIPS: Store core & VP IDs in GlobalNumber-style variable") in
v4.14-rc1 like so:

arch/mips/kernel/smp-cmp.c: In function ‘cmp_init_secondary’:
arch/mips/kernel/smp-cmp.c:53:4: error: ‘struct cpuinfo_mips’ has no member named ‘vpe_id’
   c->vpe_id = (read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) &
    ^

Fix by replacing vpe_id with cpu_set_vpe_id().

Fixes: 856fbcee6099 ("MIPS: Store core & VP IDs in GlobalNumber-style variable")
Signed-off-by: James Hogan 
Reviewed-by: Paul Burton 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17569/
Signed-off-by: James Hogan