openwrt/staging/blogic.git
5 years agortc: pcf85063: add RTC_VL_READ/RTC_VL_CLR support
Alexandre Belloni [Mon, 1 Apr 2019 16:08:16 +0000 (18:08 +0200)]
rtc: pcf85063: add RTC_VL_READ/RTC_VL_CLR support

Allow reading the oscillator status bit. Also allow clearing it even if
that makes little sense and can't be done in a race free way.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: add offset correction support
Alexandre Belloni [Mon, 1 Apr 2019 16:08:15 +0000 (18:08 +0200)]
rtc: pcf85063: add offset correction support

The PCF850363 has an offset correction with two modes:

With mode 0, the correction is triggered once every two hours and then
correction pulses are applied once per minute until the programmed
correction values have been implemented. This gives a step of 4.34 ppm.

With mode 1, the correction is triggered once every four minutes and then
correction pulses are applied once per second up to a maximum of 60 pulses.
When correction values greater than 60 pulses are used, additional
correction pulses are made in the 59 th second. This gives a step of 4.069
ppm.

Use the correction closest to the requested value.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: add nvram support
Alexandre Belloni [Mon, 1 Apr 2019 16:08:14 +0000 (18:08 +0200)]
rtc: pcf85063: add nvram support

The pcf85063 has one byte of nvram.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: add Micro Crystal RV8263 support
Alexandre Belloni [Mon, 1 Apr 2019 16:08:13 +0000 (18:08 +0200)]
rtc: pcf85063: add Micro Crystal RV8263 support

The Micro Crystal RV8263 has the same IC as the pcf85063 but has an on
board crystal. This means that the CAP_SEL bit has to be cleared so the
correct capacitance is selected for the crystal.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: add alarm support
Alexandre Belloni [Mon, 1 Apr 2019 16:08:12 +0000 (18:08 +0200)]
rtc: pcf85063: add alarm support

Add support for the alarms. The match on the weekday is not used as it it
not necessarily properly set.

The tested RTC shows a behaviour where setting an alarm on the second right
after an alarm that fired is not working, probably because of the circuit
that ensures an alarm only fires once. This is why uie_unsupported is set.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: differentiate pcf85063a and pcf85063tp
Alexandre Belloni [Mon, 1 Apr 2019 16:08:11 +0000 (18:08 +0200)]
rtc: pcf85063: differentiate pcf85063a and pcf85063tp

As stated in a comment pcf85063a and pcf85063tp don't have the same number
of registers. Especially, pcf85063tp doesn't have alarm support.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: switch to regmap
Alexandre Belloni [Mon, 1 Apr 2019 16:08:10 +0000 (18:08 +0200)]
rtc: pcf85063: switch to regmap

Switch to regmap to simplify register accesses and remove the need for
pcf85063_stop_clock/pcf85063_start_clock.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: set range
Alexandre Belloni [Mon, 1 Apr 2019 16:08:09 +0000 (18:08 +0200)]
rtc: pcf85063: set range

This is a standard BCD RTC that will fail in 2100.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: convert to devm_rtc_allocate_device
Alexandre Belloni [Mon, 1 Apr 2019 16:08:08 +0000 (18:08 +0200)]
rtc: pcf85063: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: remove bogus i2c functionality check
Alexandre Belloni [Mon, 1 Apr 2019 16:08:07 +0000 (18:08 +0200)]
rtc: pcf85063: remove bogus i2c functionality check

Only smbus reads and write are done in the driver, plain i2c functionality
is not required.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: convert to SPDX identifier
Alexandre Belloni [Mon, 1 Apr 2019 16:33:49 +0000 (18:33 +0200)]
rtc: pcf85063: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: pcf85063: switch to probe_new
Alexandre Belloni [Mon, 1 Apr 2019 16:08:05 +0000 (18:08 +0200)]
rtc: pcf85063: switch to probe_new

struct i2c_device_id argument of probe() is not used, so use probe_new()
instead.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: snvs: use devm_platform_ioremap_resource() to simplify code
Anson Huang [Mon, 1 Apr 2019 05:29:13 +0000 (05:29 +0000)]
rtc: snvs: use devm_platform_ioremap_resource() to simplify code

Use the new helper devm_platform_ioremap_resource() which wraps the
platform_get_resource() and devm_ioremap_resource() together, to
simplify the code.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: mxc: use devm_platform_ioremap_resource() to simplify code
Anson Huang [Mon, 1 Apr 2019 05:21:43 +0000 (05:21 +0000)]
rtc: mxc: use devm_platform_ioremap_resource() to simplify code

Use the new helper devm_platform_ioremap_resource() which wraps the
platform_get_resource() and devm_ioremap_resource() together, to
simplify the code.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: snvs: use dev_pm_set_wake_irq() to simplify code
Anson Huang [Wed, 27 Mar 2019 06:18:20 +0000 (06:18 +0000)]
rtc: snvs: use dev_pm_set_wake_irq() to simplify code

With calling dev_pm_set_wake_irq() to set SNVS RTC as wakeup
source for suspend, generic wake irq mechanism will automatically
enable it as wakeup source when suspend, then the suspend/resume
callback which are ONLY for enabling/disabling irq wake can be
removed, it simplifies the code.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: Add ASPEED RTC driver
Joel Stanley [Wed, 27 Mar 2019 01:02:15 +0000 (11:32 +1030)]
rtc: Add ASPEED RTC driver

Read and writes the time to the non-battery backed RTC in the ASPEED BMC
system on chip families.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agodt-bindings: rtc: Add on-chip ASPEED RTC documentation
Joel Stanley [Wed, 27 Mar 2019 01:02:14 +0000 (11:32 +1030)]
dt-bindings: rtc: Add on-chip ASPEED RTC documentation

Describe the RTC as used in the ASPEED BMC SoCs.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: brcmstb-waketimer: switch to rtc_time64_to_tm
Alexandre Belloni [Mon, 25 Mar 2019 17:17:19 +0000 (18:17 +0100)]
rtc: brcmstb-waketimer: switch to rtc_time64_to_tm

Call the 64bit version of rtc_time_to_tm as the range is enforced by the
core.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: mt6397: Don't call irq_dispose_mapping.
Pi-Hsun Shih [Mon, 11 Mar 2019 07:55:40 +0000 (15:55 +0800)]
rtc: mt6397: Don't call irq_dispose_mapping.

The IRQ mapping was changed to not being created in the rtc-mt6397
driver, so the irq_dispose_mapping is no longer needed.
Also the dev_id passed to free_irq should be the same as the last
argument passed to request_threaded_irq.
This prevents a "Trying to free already-free IRQ 274" warning when
unbinding the driver.

Fixes: e695d3a0b3b3 ("mfd: mt6397: Create irq mappings in mfd core driver")
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: opal: Make opal_tpo_alarm_irq_enable static
YueHaibing [Tue, 19 Mar 2019 15:25:31 +0000 (23:25 +0800)]
rtc: opal: Make opal_tpo_alarm_irq_enable static

Fix sparse warning:

drivers/rtc/rtc-opal.c:227:5:
 warning: symbol 'opal_tpo_alarm_irq_enable' was not declared. Should it be static?

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: Fix timestamp value for RTC_TIMESTAMP_BEGIN_1900
Geert Uytterhoeven [Fri, 22 Mar 2019 07:26:12 +0000 (08:26 +0100)]
rtc: Fix timestamp value for RTC_TIMESTAMP_BEGIN_1900

Printing "mktime64(1900, 1, 1, 0, 0, 0)" gives -2208988800.

Fixes: 83bbc5ac63326433 ("rtc: Add useful timestamp definitions")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: wm831x: convert to SPDX identifier
Alexandre Belloni [Fri, 22 Mar 2019 07:16:11 +0000 (08:16 +0100)]
rtc: wm831x: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: wm831x: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Fri, 22 Mar 2019 07:16:10 +0000 (08:16 +0100)]
rtc: wm831x: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion now that the range is
enforced by the core.

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: wm831x: remove unnecessary goto
Alexandre Belloni [Fri, 22 Mar 2019 07:16:09 +0000 (08:16 +0100)]
rtc: wm831x: remove unnecessary goto

There is no specific handling in the error path of wm831x_rtc_probe, remove
the unnecessary goto and label.

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: wm831x: set range
Alexandre Belloni [Fri, 22 Mar 2019 07:16:08 +0000 (08:16 +0100)]
rtc: wm831x: set range

The wm831x has a 32bit second counter.

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: da9063: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Thu, 21 Mar 2019 10:15:57 +0000 (11:15 +0100)]
rtc: da9063: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion now that the range is
enforced by the core.

Acked-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: da9063: set range
Alexandre Belloni [Thu, 21 Mar 2019 10:15:56 +0000 (11:15 +0100)]
rtc: da9063: set range

The DA9062 and DA9063 have a year register that can go up to 0x3F.

Acked-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sun4v: switch to SPDX identifier
Alexandre Belloni [Fri, 22 Mar 2019 07:22:56 +0000 (08:22 +0100)]
rtc: sun4v: switch to SPDX identifier

Use SPDX-License-Identifier to be clearer on the license. Choose the v2
only as this is the default Linux license.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sun4v: set range
Alexandre Belloni [Fri, 22 Mar 2019 07:22:55 +0000 (08:22 +0100)]
rtc: sun4v: set range

The Sun4v Hypervisor Core API Specification states:
Time is described by a single unsigned 64-bit word equivalent to a time_t
for the POSIX time(2) system call. The word contains the time since the
Epoch (00:00:00 UTC, January 1, 1970), measured in seconds.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sun4v: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Fri, 22 Mar 2019 07:22:54 +0000 (08:22 +0100)]
rtc: sun4v: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion as the hypervisor handles
64bit values.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: omap: convert to SPDX identifier
Alexandre Belloni [Mon, 18 Mar 2019 13:22:55 +0000 (14:22 +0100)]
rtc: omap: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: omap: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Mon, 18 Mar 2019 13:26:08 +0000 (14:26 +0100)]
rtc: omap: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_time_to_tm now that the range is enforced by
the core.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ps3: set range
Alexandre Belloni [Wed, 20 Mar 2019 12:44:28 +0000 (13:44 +0100)]
rtc: ps3: set range

The PS3 has a 64bit second counter from 2000. While this exceeds the 64bit
UNIX timestamp, there is not doubt that non of them will still be working
by then.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ps3: convert to devm_rtc_allocate_device
Alexandre Belloni [Wed, 20 Mar 2019 12:44:27 +0000 (13:44 +0100)]
rtc: ps3: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ps3: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:44:26 +0000 (13:44 +0100)]
rtc: ps3: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ps3: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Wed, 20 Mar 2019 12:44:25 +0000 (13:44 +0100)]
rtc: ps3: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion as the PS3 handles 64bit
values.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: correct trivial checkpatch warnings
Alexandre Belloni [Wed, 20 Mar 2019 12:40:42 +0000 (13:40 +0100)]
rtc: at91sam9: correct trivial checkpatch warnings

Correct trivial checkpatch warnings, mostly whitespace issues and
unbalanced braces.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:40:41 +0000 (13:40 +0100)]
rtc: at91sam9: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Wed, 20 Mar 2019 12:40:40 +0000 (13:40 +0100)]
rtc: at91sam9: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion as the range is enforced
by the core.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: set range
Alexandre Belloni [Wed, 20 Mar 2019 12:40:39 +0000 (13:40 +0100)]
rtc: at91sam9: set range

The AT91 RTT is a 32bit second counter that is saved in a 32bit global
purpose register.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: convert to devm_rtc_allocate_device
Alexandre Belloni [Wed, 20 Mar 2019 12:40:38 +0000 (13:40 +0100)]
rtc: at91sam9: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: at91sam9: drop platform_data support
Alexandre Belloni [Wed, 20 Mar 2019 12:40:37 +0000 (13:40 +0100)]
rtc: at91sam9: drop platform_data support

ARCH_AT91 is DT only for a while, drop platform data support.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sh: set range
Alexandre Belloni [Wed, 20 Mar 2019 11:30:10 +0000 (12:30 +0100)]
rtc: sh: set range

The SH RTC is a BCD RTC with some version having 4 digits for the year.

The range for the RTCs with only 2 digits for the year was unfortunately
shifted to handle 1999 to 2098.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sh: fix possible race condition
Alexandre Belloni [Wed, 20 Mar 2019 11:30:09 +0000 (12:30 +0100)]
rtc: sh: fix possible race condition

The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
struct before requesting the IRQ.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: sh: stop resetting time to epoch
Alexandre Belloni [Wed, 20 Mar 2019 11:30:08 +0000 (12:30 +0100)]
rtc: sh: stop resetting time to epoch

There is no point in resetting the time to epoch as this means that
userspace will never get the valuable information that time is actually
invalid.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
[Anders Roxell <anders.roxell@linaro.org>: remove unused variable r]
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: dm355evm: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:43:35 +0000 (13:43 +0100)]
rtc: dm355evm: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: dm355evm: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Wed, 20 Mar 2019 12:43:34 +0000 (13:43 +0100)]
rtc: dm355evm: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion as the range is enforced
by the core.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: dm355evm: set range
Alexandre Belloni [Wed, 20 Mar 2019 12:43:33 +0000 (13:43 +0100)]
rtc: dm355evm: set range

The MSP430 has a 32bit second counter.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: dm355evm: convert to devm_rtc_allocate_device
Alexandre Belloni [Wed, 20 Mar 2019 12:43:32 +0000 (13:43 +0100)]
rtc: dm355evm: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:34:17 +0000 (13:34 +0100)]
rtc: goldfish: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Wed, 20 Mar 2019 12:34:16 +0000 (13:34 +0100)]
rtc: goldfish: switch to rtc_time64_to_tm/rtc_tm_to_time64

This RTC handles dates after 2106 (up to July 2554), call the 64bit
versions of rtc_tm time conversion.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: allow building on more than MIPS
Alexandre Belloni [Wed, 20 Mar 2019 12:34:15 +0000 (13:34 +0100)]
rtc: goldfish: allow building on more than MIPS

Goldfish can be ARM or x86, allow building the driver for more than just
MIPS.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: sort headers
Alexandre Belloni [Wed, 20 Mar 2019 12:34:14 +0000 (13:34 +0100)]
rtc: goldfish: sort headers

Sort headers alphabetically.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: add range
Alexandre Belloni [Wed, 20 Mar 2019 12:34:13 +0000 (13:34 +0100)]
rtc: goldfish: add range

This RTC has a 64bit nanosecond counter.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: goldfish: convert to devm_rtc_allocate_device
Alexandre Belloni [Wed, 20 Mar 2019 12:34:12 +0000 (13:34 +0100)]
rtc: goldfish: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: use .set_time
Alexandre Belloni [Wed, 20 Mar 2019 12:32:33 +0000 (13:32 +0100)]
rtc: xgene: use .set_time

Use .set_time instead of the deprecated .set_mmss.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Wed, 20 Mar 2019 12:32:32 +0000 (13:32 +0100)]
rtc: xgene: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_tm time conversion as the range is enforced
by the core.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: stop caching alarm_time
Alexandre Belloni [Wed, 20 Mar 2019 12:32:31 +0000 (13:32 +0100)]
rtc: xgene: stop caching alarm_time

There is no point in caching alarm_time for .read_alarm because
.read_alarm is only called at boo time and thus alarm_time is always 0.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: correct checkpatch issues
Alexandre Belloni [Wed, 20 Mar 2019 12:32:30 +0000 (13:32 +0100)]
rtc: xgene: correct checkpatch issues

Correct trivial whitespace issues. Also sort the headers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:32:29 +0000 (13:32 +0100)]
rtc: xgene: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: set range
Alexandre Belloni [Wed, 20 Mar 2019 12:32:28 +0000 (13:32 +0100)]
rtc: xgene: set range

CCVR is a 32bit second counter.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: xgene: fix possible race condition
Alexandre Belloni [Wed, 20 Mar 2019 12:32:27 +0000 (13:32 +0100)]
rtc: xgene: fix possible race condition

The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
struct before requesting the IRQ.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: test: do not use assignment in if condition
Alexandre Belloni [Wed, 20 Mar 2019 12:03:12 +0000 (13:03 +0100)]
rtc: test: do not use assignment in if condition

Fix checkpatch error:
drivers/rtc/rtc-test.c:155: ERROR: do not use assignment in if condition

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: 88pm80x: convert to SPDX identifier
Alexandre Belloni [Wed, 20 Mar 2019 12:02:57 +0000 (13:02 +0100)]
rtc: 88pm80x: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: correct checkpatch issues
Alexandre Belloni [Wed, 20 Mar 2019 11:59:59 +0000 (12:59 +0100)]
rtc: ab-b5ze-s3: correct checkpatch issues

Correct trivial whitespace and split strings issues.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: core: correct trivial checkpatch warnings
Alexandre Belloni [Wed, 20 Mar 2019 11:59:09 +0000 (12:59 +0100)]
rtc: core: correct trivial checkpatch warnings

Correct trivial checkpatch warnings, mostly whitespace issues and
unbalanced braces.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: x1205: Add DT probing support
Linus Walleij [Tue, 19 Mar 2019 07:40:14 +0000 (08:40 +0100)]
rtc: x1205: Add DT probing support

This makes it possible to probe the X1205 RTC from the
device tree. This is needed when adding device tree boot
support for the IXP4xx-based NSLU2 which has this RTC.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: x1205: Add DT bindings
Linus Walleij [Tue, 19 Mar 2019 07:40:13 +0000 (08:40 +0100)]
rtc: x1205: Add DT bindings

This adds device tree bindings for the Xircom X1205 RTC found
in the Linksys NSLU2.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[alexandre.belloni@bootlin.com: move doc to rtc.txt]
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: da9063: convert header to SPDX
Wolfram Sang [Mon, 18 Mar 2019 15:57:27 +0000 (16:57 +0100)]
rtc: da9063: convert header to SPDX

Covnert the header of the source file to SPDX.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: omap: let the core handle range
Alexandre Belloni [Mon, 18 Mar 2019 12:44:38 +0000 (13:44 +0100)]
rtc: omap: let the core handle range

Let the core handle the RTC range instead of open coding it.

Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: mv: add range
Alexandre Belloni [Fri, 15 Mar 2019 13:35:10 +0000 (14:35 +0100)]
rtc: mv: add range

This RTC handles time from 2000-01-01 00:00:00 to 2099-12-31 23:59:59 with
a weird rollover to 2000-06-23 00:00:00.

Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: mv: convert to devm_rtc_allocate_device
Alexandre Belloni [Fri, 15 Mar 2019 13:35:09 +0000 (14:35 +0100)]
rtc: mv: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: mv: convert to SPDX identifier
Alexandre Belloni [Fri, 15 Mar 2019 13:35:08 +0000 (14:35 +0100)]
rtc: mv: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: convert core to SPDX identifier
Alexandre Belloni [Wed, 13 Mar 2019 22:02:48 +0000 (23:02 +0100)]
rtc: convert core to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text. Also fix the
block comment alignment.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: remove unnecessary check
Alexandre Belloni [Tue, 12 Mar 2019 22:39:03 +0000 (23:39 +0100)]
rtc: ab-b5ze-s3: remove unnecessary check

The core already checks that the alarm is set in the future. IT is not
necessary to do it again in the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: convert to SPDX identifier
Alexandre Belloni [Tue, 12 Mar 2019 22:33:02 +0000 (23:33 +0100)]
rtc: ab-b5ze-s3: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: switch to rtc_time64_to_tm/rtc_tm_to_time64
Alexandre Belloni [Tue, 12 Mar 2019 22:30:44 +0000 (23:30 +0100)]
rtc: ab-b5ze-s3: switch to rtc_time64_to_tm/rtc_tm_to_time64

Call the 64bit versions of rtc_time_to_tm as the range is enforced by the
core.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: remove unnecessary gotos
Alexandre Belloni [Tue, 12 Mar 2019 22:15:24 +0000 (23:15 +0100)]
rtc: ab-b5ze-s3: remove unnecessary gotos

Rework error handling to remove unnecessary gotos.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: ab-b5ze-s3: remove mutex
Alexandre Belloni [Tue, 12 Mar 2019 22:48:13 +0000 (23:48 +0100)]
rtc: ab-b5ze-s3: remove mutex

The rtc_ops are already called with the RTC mutex locked so there is no
need to have a separate lock, unless it is used in the irq handler.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: zynqmp: convert to SPDX identifier
Alexandre Belloni [Thu, 7 Mar 2019 11:04:08 +0000 (12:04 +0100)]
rtc: zynqmp: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: abx80x: remove useless .remove
Alexandre Belloni [Wed, 6 Mar 2019 09:51:34 +0000 (10:51 +0100)]
rtc: abx80x: remove useless .remove

.remove is empty, remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: abx80x: use rtc_add_group
Alexandre Belloni [Wed, 6 Mar 2019 09:51:33 +0000 (10:51 +0100)]
rtc: abx80x: use rtc_add_group

Use rtc_add_group to add the sysfs group in a race free manner.
This has the side effect of moving the files to their proper location.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agortc: abx80x: convert to SPDX identifier
Alexandre Belloni [Wed, 6 Mar 2019 09:51:32 +0000 (10:51 +0100)]
rtc: abx80x: convert to SPDX identifier

Use SPDX-License-Identifier instead of a verbose license text.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 years agoLinux 5.1-rc1
Linus Torvalds [Sun, 17 Mar 2019 21:22:26 +0000 (14:22 -0700)]
Linux 5.1-rc1

5 years agoMerge tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...
Linus Torvalds [Sun, 17 Mar 2019 20:25:26 +0000 (13:25 -0700)]
Merge tag 'kbuild-v5.1-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - add more Build-Depends to Debian source package

 - prefix header search paths with $(srctree)/

 - make modpost show verbose section mismatch warnings

 - avoid hard-coded CROSS_COMPILE for h8300

 - fix regression for Debian make-kpkg command

 - add semantic patch to detect missing put_device()

 - fix some warnings of 'make deb-pkg'

 - optimize NOSTDINC_FLAGS evaluation

 - add warnings about redundant generic-y

 - clean up Makefiles and scripts

* tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kconfig: remove stale lxdialog/.gitignore
  kbuild: force all architectures except um to include mandatory-y
  kbuild: warn redundant generic-y
  Revert "modsign: Abort modules_install when signing fails"
  kbuild: Make NOSTDINC_FLAGS a simply expanded variable
  kbuild: deb-pkg: avoid implicit effects
  coccinelle: semantic code search for missing put_device()
  kbuild: pkg: grep include/config/auto.conf instead of $KCONFIG_CONFIG
  kbuild: deb-pkg: introduce is_enabled and if_enabled_echo to builddeb
  kbuild: deb-pkg: add CONFIG_ prefix to kernel config options
  kbuild: add workaround for Debian make-kpkg
  kbuild: source include/config/auto.conf instead of ${KCONFIG_CONFIG}
  unicore32: simplify linker script generation for decompressor
  h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-
  kbuild: move archive command to scripts/Makefile.lib
  modpost: always show verbose warning for section mismatch
  ia64: prefix header search path with $(srctree)/
  libfdt: prefix header search paths with $(srctree)/
  deb-pkg: generate correct build dependencies

5 years agoMerge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 17 Mar 2019 16:21:48 +0000 (09:21 -0700)]
Merge branch 'x86-asm-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 asm updates from Thomas Gleixner:
 "Two cleanup patches removing dead conditionals and unused code"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/asm: Remove unused __constant_c_x_memset() macro and inlines
  x86/asm: Remove dead __GNUC__ conditionals

5 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Mar 2019 16:19:22 +0000 (09:19 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "Three fixes for the fallout from the TSX errata workaround:

   - Prevent memory corruption caused by a unchecked out of bound array
     index.

   - Two trivial fixes to address compiler warnings"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Make dev_attr_allow_tsx_force_abort static
  perf/x86: Fixup typo in stub functions
  perf/x86/intel: Fix memory corruption

5 years agoMerge tag 'for-linus-5.1b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Mar 2019 16:16:22 +0000 (09:16 -0700)]
Merge tag 'for-linus-5.1b-rc1b-tag' of git://git./linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "A fix for a Xen bug introduced by David's series for excluding
  ballooned pages in vmcores"

* tag 'for-linus-5.1b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/balloon: Fix mapping PG_offline pages to user space

5 years agoMerge tag '9p-for-5.1' of git://github.com/martinetd/linux
Linus Torvalds [Sun, 17 Mar 2019 16:10:56 +0000 (09:10 -0700)]
Merge tag '9p-for-5.1' of git://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:
 "Here is a 9p update for 5.1; there honestly hasn't been much.

  Two fixes (leak on invalid mount argument and possible deadlock on
  i_size update on 32bit smp) and a fall-through warning cleanup"

* tag '9p-for-5.1' of git://github.com/martinetd/linux:
  9p/net: fix memory leak in p9_client_create
  9p: use inode->i_lock to protect i_size_write() under 32-bit
  9p: mark expected switch fall-through

5 years agoperf/x86/intel: Make dev_attr_allow_tsx_force_abort static
kbuild test robot [Wed, 13 Mar 2019 18:42:43 +0000 (02:42 +0800)]
perf/x86/intel: Make dev_attr_allow_tsx_force_abort static

Fixes: 400816f60c54 ("perf/x86/intel: Implement support for TSX Force Abort")
Signed-off-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: kbuild-all@01.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190313184243.GA10820@lkp-sb-ep06
5 years agokconfig: remove stale lxdialog/.gitignore
Masahiro Yamada [Sun, 17 Mar 2019 06:05:03 +0000 (15:05 +0900)]
kconfig: remove stale lxdialog/.gitignore

When this .gitignore was added, lxdialog was an independent hostprogs-y.

Now that all objects in lxdialog/ are directly linked to mconf, the
lxdialog is no longer generated.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agokbuild: force all architectures except um to include mandatory-y
Masahiro Yamada [Sun, 17 Mar 2019 02:01:09 +0000 (11:01 +0900)]
kbuild: force all architectures except um to include mandatory-y

Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes
the common Kbuild.asm file. Factor out the duplicated include directives
to scripts/Makefile.asm-generic so that no architecture would opt out
of the mandatory-y mechanism.

um is not forced to include mandatory-y since it is a very exceptional
case which does not support UAPI.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agokbuild: warn redundant generic-y
Masahiro Yamada [Sun, 17 Mar 2019 02:01:08 +0000 (11:01 +0900)]
kbuild: warn redundant generic-y

The generic-y is redundant under the following condition:

 - arch has its own implementation

 - the same header is added to generated-y

 - the same header is added to mandatory-y

If a redundant generic-y is found, the warning like follows is displayed:

  scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h

I fixed up arch Kbuild files found by this.

Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agoRevert "modsign: Abort modules_install when signing fails"
Douglas Anderson [Fri, 15 Mar 2019 16:25:03 +0000 (09:25 -0700)]
Revert "modsign: Abort modules_install when signing fails"

This reverts commit caf6fe91ddf62a96401e21e9b7a07227440f4185.

The commit was fine but is no longer needed as of commit 3a2429e1faf4
("kbuild: change if_changed_rule for multi-line recipe").  Let's go
back to using ";" to be consistent.

For some discussion, see:

https://lkml.kernel.org/r/CAK7LNASde0Q9S5GKeQiWhArfER4S4wL1=R_FW8q0++_X3T5=hQ@mail.gmail.com

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agokbuild: Make NOSTDINC_FLAGS a simply expanded variable
Douglas Anderson [Thu, 14 Mar 2019 23:41:59 +0000 (16:41 -0700)]
kbuild: Make NOSTDINC_FLAGS a simply expanded variable

During a simple no-op (nothing changed) build I saw 39 invocations of
the C compiler with the argument "-print-file-name=include".  We don't
need to call the C compiler 39 times for this--one time will suffice.

Let's change NOSTDINC_FLAGS to a simply expanded variable to avoid
this since there doesn't appear to be any reason it should be
recursively expanded.

On my build this shaved ~400 ms off my "no-op" build.

Note that the recursive expansion seems to date back to the (really
old) commit e8f5bdb02ce0 ("[PATCH] Makefile include path ordering").
It's a little unclear to me if the point of that patch was to switch
the variable to be recursively expanded (which it did) or to avoid
directly assigning to NOSTDINC_FLAGS (AKA to switch to +=) because
someone else (out of tree?) was setting it.  I presume later since if
the only goal was to switch to recursive expansion the patch would
have just removed the ":".

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agokbuild: deb-pkg: avoid implicit effects
Arseny Maslennikov [Sat, 9 Mar 2019 15:43:06 +0000 (18:43 +0300)]
kbuild: deb-pkg: avoid implicit effects

* The man page for dpkg-source(1) notes:

>      -b, --build directory [format-specific-parameters]
>             Build  a  source  package  (--build since dpkg 1.17.14).
>             <...>
>
>             dpkg-source will build the source package with the first
>             format found in this ordered list: the format  indicated
>             with  the  --format  command  line  option,  the  format
>             indicated in debian/source/format, “1.0”.  The  fallback
>             to “1.0” is deprecated and will be removed at some point
>             in the future, you should always  document  the  desired
>             source   format  in  debian/source/format.  See  section
>             SOURCE PACKAGE FORMATS for an extensive  description  of
>             the various source package formats.

  Thus it would be more foolproof to explicitly use 1.0 (as we always
  did) than to rely on dpkg-source's defaults.

* In a similar vein, debian/rules is not made executable by mkdebian,
  and dpkg-source warns about that but still silently fixes the file.
  Let's be explicit once again.

Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agococcinelle: semantic code search for missing put_device()
Wen Yang [Fri, 15 Feb 2019 07:55:19 +0000 (15:55 +0800)]
coccinelle: semantic code search for missing put_device()

The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.
The implementation of this semantic code search is:
In a function, for a local variable returned by calling
of_find_device_by_node(),
a, if it is released by a function such as
   put_device()/of_dev_put()/platform_device_put() after the last use,
   it is considered that there is no reference leak;
b, if it is passed back to the caller via
   dev_get_drvdata()/platform_get_drvdata()/get_device(), etc., the
   reference will be released in other functions, and the current function
   also considers that there is no reference leak;
c, for the rest of the situation, the current function should release the
   reference by calling put_device, this code search will report the
   corresponding error message.

By using this semantic code search, we have found some object reference leaks,
such as:
commit 11907e9d3533 ("ASoC: fsl-asoc-card: fix object reference leaks in
fsl_asoc_card_probe")
commit a12085d13997 ("mtd: rawnand: atmel: fix possible object reference leak")
commit 11493f26856a ("mtd: rawnand: jz4780: fix possible object reference leak")

There are still dozens of reference leaks in the current kernel code.

Further, for the case of b, the object returned to other functions may also
have a reference leak, we will continue to develop other cocci scripts to
further check the reference leak.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
5 years agoMerge tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner...
Linus Torvalds [Sat, 16 Mar 2019 20:47:14 +0000 (13:47 -0700)]
Merge tag 'pidfd-v5.1-rc1' of git://git./linux/kernel/git/brauner/linux

Pull pidfd system call from Christian Brauner:
 "This introduces the ability to use file descriptors from /proc/<pid>/
  as stable handles on struct pid. Even if a pid is recycled the handle
  will not change. For a start these fds can be used to send signals to
  the processes they refer to.

  With the ability to use /proc/<pid> fds as stable handles on struct
  pid we can fix a long-standing issue where after a process has exited
  its pid can be reused by another process. If a caller sends a signal
  to a reused pid it will end up signaling the wrong process.

  With this patchset we enable a variety of use cases. One obvious
  example is that we can now safely delegate an important part of
  process management - sending signals - to processes other than the
  parent of a given process by sending file descriptors around via scm
  rights and not fearing that the given process will have been recycled
  in the meantime. It also allows for easy testing whether a given
  process is still alive or not by sending signal 0 to a pidfd which is
  quite handy.

  There has been some interest in this feature e.g. from systems
  management (systemd, glibc) and container managers. I have requested
  and gotten comments from glibc to make sure that this syscall is
  suitable for their needs as well. In the future I expect it to take on
  most other pid-based signal syscalls. But such features are left for
  the future once they are needed.

  This has been sitting in linux-next for quite a while and has not
  caused any issues. It comes with selftests which verify basic
  functionality and also test that a recycled pid cannot be signaled via
  a pidfd.

  Jon has written about a prior version of this patchset. It should
  cover the basic functionality since not a lot has changed since then:

      https://lwn.net/Articles/773459/

  The commit message for the syscall itself is extensively documenting
  the syscall, including it's functionality and extensibility"

* tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  selftests: add tests for pidfd_send_signal()
  signal: add pidfd_send_signal() syscall

5 years agoMerge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm...
Linus Torvalds [Sat, 16 Mar 2019 20:05:32 +0000 (13:05 -0700)]
Merge tag 'devdax-for-5.1' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull device-dax updates from Dan Williams:
 "New device-dax infrastructure to allow persistent memory and other
  "reserved" / performance differentiated memories, to be assigned to
  the core-mm as "System RAM".

  Some users want to use persistent memory as additional volatile
  memory. They are willing to cope with potential performance
  differences, for example between DRAM and 3D Xpoint, and want to use
  typical Linux memory management apis rather than a userspace memory
  allocator layered over an mmap() of a dax file. The administration
  model is to decide how much Persistent Memory (pmem) to use as System
  RAM, create a device-dax-mode namespace of that size, and then assign
  it to the core-mm. The rationale for device-dax is that it is a
  generic memory-mapping driver that can be layered over any "special
  purpose" memory, not just pmem. On subsequent boots udev rules can be
  used to restore the memory assignment.

  One implication of using pmem as RAM is that mlock() no longer keeps
  data off persistent media. For this reason it is recommended to enable
  NVDIMM Security (previously merged for 5.0) to encrypt pmem contents
  at rest. We considered making this recommendation an actively enforced
  requirement, but in the end decided to leave it as a distribution /
  administrator policy to allow for emulation and test environments that
  lack security capable NVDIMMs.

  Summary:

   - Replace the /sys/class/dax device model with /sys/bus/dax, and
     include a compat driver so distributions can opt-in to the new ABI.

   - Allow for an alternative driver for the device-dax address-range

   - Introduce the 'kmem' driver to hotplug / assign a device-dax
     address-range to the core-mm.

   - Arrange for the device-dax target-node to be onlined so that the
     newly added memory range can be uniquely referenced by numa apis"

NOTE! I'm not entirely happy with the whole "PMEM as RAM" model because
we currently have special - and very annoying rules in the kernel about
accessing PMEM only with the "MC safe" accessors, because machine checks
inside the regular repeat string copy functions can be fatal in some
(not described) circumstances.

And apparently the PMEM modules can cause that a lot more than regular
RAM.  The argument is that this happens because PMEM doesn't necessarily
get scrubbed at boot like RAM does, but that is planned to be added for
the user space tooling.

Quoting Dan from another email:
 "The exposure can be reduced in the volatile-RAM case by scanning for
  and clearing errors before it is onlined as RAM. The userspace tooling
  for that can be in place before v5.1-final. There's also runtime
  notifications of errors via acpi_nfit_uc_error_notify() from
  background scrubbers on the DIMM devices. With that mechanism the
  kernel could proactively clear newly discovered poison in the volatile
  case, but that would be additional development more suitable for v5.2.

  I understand the concern, and the need to highlight this issue by
  tapping the brakes on feature development, but I don't see PMEM as RAM
  making the situation worse when the exposure is also there via DAX in
  the PMEM case. Volatile-RAM is arguably a safer use case since it's
  possible to repair pages where the persistent case needs active
  application coordination"

* tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: "Hotplug" persistent memory for use like normal RAM
  mm/resource: Let walk_system_ram_range() search child resources
  mm/memory-hotplug: Allow memory resources to be children
  mm/resource: Move HMM pr_debug() deeper into resource code
  mm/resource: Return real error codes from walk failures
  device-dax: Add a 'modalias' attribute to DAX 'bus' devices
  device-dax: Add a 'target_node' attribute
  device-dax: Auto-bind device after successful new_id
  acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node
  device-dax: Add /sys/class/dax backwards compatibility
  device-dax: Add support for a dax override driver
  device-dax: Move resource pinning+mapping into the common driver
  device-dax: Introduce bus + driver model
  device-dax: Start defining a dax bus model
  device-dax: Remove multi-resource infrastructure
  device-dax: Kill dax_region base
  device-dax: Kill dax_region ida

5 years agoMerge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 16 Mar 2019 19:51:50 +0000 (12:51 -0700)]
Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi

Pull more SCSI updates from James Bottomley:
 "This is the final round of mostly small fixes and performance
  improvements to our initial submit.

  The main regression fix is the ia64 simscsi build failure which was
  missed in the serial number elimination conversion"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (24 commits)
  scsi: ia64: simscsi: use request tag instead of serial_number
  scsi: aacraid: Fix performance issue on logical drives
  scsi: lpfc: Fix error codes in lpfc_sli4_pci_mem_setup()
  scsi: libiscsi: Hold back_lock when calling iscsi_complete_task
  scsi: hisi_sas: Change SERDES_CFG init value to increase reliability of HiLink
  scsi: hisi_sas: Send HARD RESET to clear the previous affiliation of STP target port
  scsi: hisi_sas: Set PHY linkrate when disconnected
  scsi: hisi_sas: print PHY RX errors count for later revision of v3 hw
  scsi: hisi_sas: Fix a timeout race of driver internal and SMP IO
  scsi: hisi_sas: Change return variable type in phy_up_v3_hw()
  scsi: qla2xxx: check for kstrtol() failure
  scsi: lpfc: fix 32-bit format string warning
  scsi: lpfc: fix unused variable warning
  scsi: target: tcmu: Switch to bitmap_zalloc()
  scsi: libiscsi: fall back to sendmsg for slab pages
  scsi: qla2xxx: avoid printf format warning
  scsi: lpfc: resolve static checker warning in lpfc_sli4_hba_unset
  scsi: lpfc: Correct __lpfc_sli_issue_iocb_s4 lockdep check
  scsi: ufs: hisi: fix ufs_hba_variant_ops passing
  scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show
  ...