linux-stable.git/Documentation, branch linux-4.1.y

Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition

2018-05-23T01:33:58+00:00

[ Upstream commit 0ea66f76ba17a4b229caaadd77de694111b21769 ]

GPIO7 is configured in POWERHOLD mode which has higher priority
over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
bit is turned off. This property enables driver to over ride the
POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
scenarios.

Signed-off-by: Keerthy 
Acked-by: Rob Herring 
Signed-off-by: Linus Walleij 
Signed-off-by: Sasha Levin

x86/paravirt: Remove 'noreplace-paravirt' cmdline option

2018-03-04T15:28:33+00:00

[ Upstream commit 12c69f1e94c89d40696e83804dd2f0965b5250cd ]

The 'noreplace-paravirt' option disables paravirt patching, leaving the
original pv indirect calls in place.

That's highly incompatible with retpolines, unless we want to uglify
paravirt even further and convert the paravirt calls to retpolines.

As far as I can tell, the option doesn't seem to be useful for much
other than introducing surprising corner cases and making the kernel
vulnerable to Spectre v2.  It was probably a debug option from the early
paravirt days.  So just remove it.

Signed-off-by: Josh Poimboeuf 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Juergen Gross 
Cc: Andrea Arcangeli 
Cc: Peter Zijlstra 
Cc: Andi Kleen 
Cc: Ashok Raj 
Cc: Greg KH 
Cc: Jun Nakajima 
Cc: Tim Chen 
Cc: Rusty Russell 
Cc: Dave Hansen 
Cc: Asit Mallick 
Cc: Andy Lutomirski 
Cc: Linus Torvalds 
Cc: Jason Baron 
Cc: Paolo Bonzini 
Cc: Alok Kataria 
Cc: Arjan Van De Ven 
Cc: David Woodhouse 
Cc: Dan Williams 
Link: https://lkml.kernel.org/r/20180131041333.2x6blhxirc2kclrq@treble
Signed-off-by: Sasha Levin

Documentation: Document array_index_nospec

2018-03-04T15:28:33+00:00

[ Upstream commit f84a56f73dddaeac1dba8045b007f742f61cd2da ]

Document the rationale and usage of the new array_index_nospec() helper.

Signed-off-by: Mark Rutland 
Signed-off-by: Will Deacon 
Signed-off-by: Dan Williams 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Kees Cook 
Cc: linux-arch@vger.kernel.org
Cc: Jonathan Corbet 
Cc: Peter Zijlstra 
Cc: gregkh@linuxfoundation.org
Cc: kernel-hardening@lists.openwall.com
Cc: torvalds@linux-foundation.org
Cc: alan@linux.intel.com
Link: https://lkml.kernel.org/r/151727413645.33451.15878817161436755393.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Sasha Levin

ext4: correct documentation for grpid mount option

2018-03-04T15:28:23+00:00

[ Upstream commit 9f0372488cc9243018a812e8cfbf27de650b187b ]

The grpid option is currently described as being the same as nogrpid.

Signed-off-by: Ernesto A. Fernández 
Signed-off-by: Theodore Ts'o 
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin

arm: spear13xx: Fix dmas cells

2018-03-04T15:28:22+00:00

[ Upstream commit cdd10409914184c7eee5ae3e11beb890c9c16c61 ]

The "dmas" cells for the designware DMA controller need to have only 3
properties apart from the phandle: request line, src master and
destination master. But the commit 6e8887f60f60 updated it incorrectly
while moving from platform code to DT. Fix it.

Cc: stable@vger.kernel.org # v3.10+
Fixes: 6e8887f60f60 ("ARM: SPEAr13xx: Pass generic DW DMAC platform data from DT")
Reported-by: Arnd Bergmann 
Signed-off-by: Viresh Kumar 
Signed-off-by: Olof Johansson 
Signed-off-by: Sasha Levin

x86/mm: Add the 'nopcid' boot option to turn off PCID

2018-03-01T00:32:18+00:00

[ Upstream commit 0790c9aad84901ca1bdc14746175549c8b5da215 ]

The parameter is only present on x86_64 systems to save a few bytes,
as PCID is always disabled on x86_32.

Signed-off-by: Andy Lutomirski 
Reviewed-by: Nadav Amit 
Reviewed-by: Borislav Petkov 
Reviewed-by: Thomas Gleixner 
Cc: Andrew Morton 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Linus Torvalds 
Cc: Mel Gorman 
Cc: Peter Zijlstra 
Cc: Rik van Riel 
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/8bbb2e65bcd249a5f18bfb8128b4689f08ac2b60.1498751203.git.luto@kernel.org
Signed-off-by: Ingo Molnar 
Signed-off-by: Sasha Levin

x86/mm: Add a 'noinvpcid' boot option to turn off INVPCID

2018-03-01T00:32:12+00:00

[ Upstream commit d12a72b844a49d4162f24cefdab30bed3f86730e ]

This adds a chicken bit to turn off INVPCID in case something goes
wrong.  It's an early_param() because we do TLB flushes before we
parse __setup() parameters.

Signed-off-by: Andy Lutomirski 
Reviewed-by: Borislav Petkov 
Cc: Andrew Morton 
Cc: Andrey Ryabinin 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Hansen 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Luis R. Rodriguez 
Cc: Oleg Nesterov 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Toshi Kani 
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/f586317ed1bc2b87aee652267e515b90051af385.1454096309.git.luto@kernel.org
Signed-off-by: Ingo Molnar 
Signed-off-by: Sasha Levin

iio: adc: hx711: Add DT binding for avia,hx711

2017-11-06T04:54:14+00:00

[ Upstream commit ff1293f67734da68e23fecb6ecdae7112b8c43f9 ]

Add DT bindings for avia,hx711
Add vendor avia to vendor list

Signed-off-by: Andreas Klinger 
Acked-by: Rob Herring 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

drm: bridge: add DT bindings for TI ths8135

2017-11-06T04:54:13+00:00

[ Upstream commit 2e644be30fcc08c736f66b60f4898d274d4873ab ]

THS8135 is a configurable video DAC. Add DT bindings for this chip.

Signed-off-by: Bartosz Golaszewski 
Reviewed-by: Laurent Pinchart 
Acked-by: Rob Herring 
Signed-off-by: Archit Taneja 
Link: http://patchwork.freedesktop.org/patch/msgid/1481623759-12786-3-git-send-email-bgolaszewski@baylibre.com
Signed-off-by: Sasha Levin

sysctl: enable strict writes

2017-07-31T17:37:49+00:00

[ Upstream commit 41662f5cc55335807d39404371cfcbb1909304c4 ]

SYSCTL_WRITES_WARN was added in commit f4aacea2f5d1 ("sysctl: allow for
strict write position handling"), and released in v3.16 in August of
2014.  Since then I can find only 1 instance of non-zero offset
writing[1], and it was fixed immediately in CRIU[2].  As such, it
appears safe to flip this to the strict state now.

[1] https://www.google.com/search?q="when%20file%20position%20was%20not%200"
[2] http://lists.openvz.org/pipermail/criu/2015-April/019819.html

Signed-off-by: Kees Cook 
Cc: "Eric W. Biederman" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Sasha Levin