openwrt/staging/blogic.git
5 years agoMerge branch 'topic/sh' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:02:16 +0000 (19:32 +0530)]
Merge branch 'topic/sh' into for-linus

5 years agoMerge branch 'topic/sa11x0' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:02:10 +0000 (19:32 +0530)]
Merge branch 'topic/sa11x0' into for-linus

5 years agoMerge branch 'topic/mtk' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:59 +0000 (19:31 +0530)]
Merge branch 'topic/mtk' into for-linus

5 years agoMerge branch 'topic/imx' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:54 +0000 (19:31 +0530)]
Merge branch 'topic/imx' into for-linus

5 years agoMerge branch 'topic/ep93xx' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:47 +0000 (19:31 +0530)]
Merge branch 'topic/ep93xx' into for-linus

5 years agoMerge branch 'topic/dw' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:42 +0000 (19:31 +0530)]
Merge branch 'topic/dw' into for-linus

5 years agoMerge branch 'topic/dmatest' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:37 +0000 (19:31 +0530)]
Merge branch 'topic/dmatest' into for-linus

5 years agoMerge branch 'topic/dirn_remove' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:31 +0000 (19:31 +0530)]
Merge branch 'topic/dirn_remove' into for-linus

5 years agoMerge branch 'topic/coh' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:25 +0000 (19:31 +0530)]
Merge branch 'topic/coh' into for-linus

5 years agoMerge branch 'topic/bcm' into for-linus
Vinod Koul [Mon, 31 Dec 2018 14:01:21 +0000 (19:31 +0530)]
Merge branch 'topic/bcm' into for-linus

5 years agodmaengine: qcom_hidma: convert to DEFINE_SHOW_ATTRIBUTE
Yangtao Li [Wed, 5 Dec 2018 16:19:00 +0000 (11:19 -0500)]
dmaengine: qcom_hidma: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: pxa: remove DBGFS_FUNC_DECL()
Yangtao Li [Wed, 5 Dec 2018 16:18:59 +0000 (11:18 -0500)]
dmaengine: pxa: remove DBGFS_FUNC_DECL()

We already have the DEFINE_SHOW_ATTRIBUTE, There is no need to define
such a macro, so remove DBGFS_FUNC_DECL.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: mic_x100_dma: convert to DEFINE_SHOW_ATTRIBUTE
Yangtao Li [Wed, 5 Dec 2018 16:18:58 +0000 (11:18 -0500)]
dmaengine: mic_x100_dma: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: amba-pl08x: convert to DEFINE_SHOW_ATTRIBUTE
Yangtao Li [Wed, 5 Dec 2018 16:18:57 +0000 (11:18 -0500)]
dmaengine: amba-pl08x: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: Documentation: Add documentation for multi chan testing
Seraj Alijan [Mon, 10 Dec 2018 08:52:42 +0000 (08:52 +0000)]
dmaengine: Documentation: Add documentation for multi chan testing

Modify documentation to add multi channel testing support.

Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: Add transfer_size parameter
Seraj Alijan [Mon, 10 Dec 2018 08:52:39 +0000 (08:52 +0000)]
dmaengine: dmatest: Add transfer_size parameter

Existing transfer size "len" is either generated randomly or set to the
size of test_buf_size. In some cases we need to explicitly specify a
transfer size that is different from the buffer size and non aligned to
test the target device's ability to handle unaligned transfers.

This patch adds optional parameter "transfer_size" to allow setting
explicit transfer size for dma transfers.

Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: Add alignment parameter
Seraj Alijan [Mon, 10 Dec 2018 08:52:37 +0000 (08:52 +0000)]
dmaengine: dmatest: Add alignment parameter

Add parameter "alignment" to allow setting the address alignment
manually. Having the ability to configure address alignment from
user space adds new testing capabilities where different alignments can
be configured for testing without having to modify the dma device
alignment properties.

If configured, the alignment value will override the device alignment
property of the target device.

Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: Use fixed point div to calculate iops
Seraj Alijan [Mon, 10 Dec 2018 08:52:34 +0000 (08:52 +0000)]
dmaengine: dmatest: Use fixed point div to calculate iops

Use fixed point division to calculate iops to prevent reporting 0 iops
when operations last for longer than a second.

Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: Add support for multi channel testing
Seraj Alijan [Mon, 10 Dec 2018 08:52:31 +0000 (08:52 +0000)]
dmaengine: dmatest: Add support for multi channel testing

Add support for running tests on multiple channels simultaneously as the
driver currently limits to 1 channel per test run. This will add support
for stress testing DMA controllers with multi channel capabilities.

This is done by adding a callback function to the "channel" parameter
that registers the requested channel prior to the "run" parameter being
set to 1. Each time the "channel" parameter is populated with a new
dma channel, a new test is appended to the thread queue. Once the "run"
parameter is set to 1, the test will kick start all pending threads.

Signed-off-by: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: rcar-dmac: Document R8A774C0 bindings
Fabrizio Castro [Thu, 13 Dec 2018 20:17:43 +0000 (20:17 +0000)]
dmaengine: rcar-dmac: Document R8A774C0 bindings

Renesas' RZ/G2E (R8A774C0) SoC has DMA controllers compatible
with this driver, therefore document RZ/G2E specific bindings.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodt-bindings: dmaengine: usb-dmac: Add binding for r8a774c0
Fabrizio Castro [Thu, 13 Dec 2018 20:21:31 +0000 (20:21 +0000)]
dt-bindings: dmaengine: usb-dmac: Add binding for r8a774c0

This patch adds bindings for the r8a774c0 (RZ/G2E).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: zynqmp_dma: replace spin_lock_bh with spin_lock_irqsave
Michael Tretter [Mon, 26 Nov 2018 15:14:25 +0000 (16:14 +0100)]
dmaengine: zynqmp_dma: replace spin_lock_bh with spin_lock_irqsave

All device_prep_dma_* functions and device_issue_pending can be called
from an interrupt context. As this includes hard IRQs, we must use
spin_lock_irqsave() instead of spin_lock_bh() to access chan->lock.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: fix a small memory leak in dmatest_func()
Dan Carpenter [Mon, 3 Dec 2018 14:49:33 +0000 (17:49 +0300)]
dmaengine: dmatest: fix a small memory leak in dmatest_func()

We recently moved the test size tests around but it means we need to
adjust the error handling as well or we leak the "pq_coefs" memory.  I
updated the label name to reflect that we're freeing coefs.

Fixes: 787d3083caf8 ("dmaengine: dmatest: move size checks earlier in function")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: sh: Remove R-Mobile APE6 support
Geert Uytterhoeven [Mon, 3 Dec 2018 14:18:06 +0000 (15:18 +0100)]
dmaengine: sh: Remove R-Mobile APE6 support

Renesas R-Mobile APE6 support is currently unused:
  - DMA slaves were never enabled in r8a73a4.dtsi,
  - The driver relies on legacy filter matching and describing all
    slaves and MID/RIDs in a table, unlike modern DMA engine drivers for
    similar hardware like rcar-dmac,
  - The driver doesn't seem to work well.

Remove the driver, it can be resurrected from git history when needed.

As this was the last user of SH_DMAE_BASE on Renesas ARM SoCs, the
sh-dma-engine driver core is now used on SuperH only.

Note that the DT bindings are still present, as r8a73a4.dtsi uses them.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: coh901318: Remove unused variable
Vinod Koul [Mon, 26 Nov 2018 08:04:15 +0000 (13:34 +0530)]
dmaengine: coh901318: Remove unused variable

Commit 627469e4445b ("dmaengine: coh901318: Fix a double-lock bug") left
flags variable unused, so remove it to fix the warning.

drivers/dma/coh901318.c: In function 'coh901318_config':
drivers/dma/coh901318.c:1805:16: warning: unused variable 'flags' [-Wunused-variable]
  unsigned long flags;
                ^~~~~

Fixes: 627469e4445b ("dmaengine: coh901318: Fix a double-lock bug")
Reported-By: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: ste_dma40: remove dma_slave_config direction usage
Vinod Koul [Mon, 29 Oct 2018 04:39:47 +0000 (10:09 +0530)]
dmaengine: ste_dma40: remove dma_slave_config direction usage

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: pl330: remove dma_slave_config direction usage
Vinod Koul [Thu, 25 Oct 2018 14:26:07 +0000 (15:26 +0100)]
dmaengine: pl330: remove dma_slave_config direction usage

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed

Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: imx-sdma: remove dma_slave_config direction usage and leave sdma_event_ena...
Vinod Koul [Thu, 25 Oct 2018 14:15:28 +0000 (15:15 +0100)]
dmaengine: imx-sdma: remove dma_slave_config direction usage and leave sdma_event_enable()

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed

ENBLn bit should be set before any dma request triggered, please
refer to the below information from i.mx6sololite RM. Otherwise,
spi/uart test will be fail because there is dma request from tx
fifo always before dmaengine_prep_slave_sg() in where ENBLn set
and violate the below rule.

https://www.nxp.com/docs/en/reference-manual/IMX6SLRM.pdf:

40.8.28 Channel Enable RAM (SDMAARM_CHNENBLn)
"It is thus essential for the Arm platform to program them before
any DMA request is triggered to the SDMA, otherwise an unpredictable
combination of channels may be started".

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
[vkoul: sqashed patch from Robin into direction change]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dw-dmac: implement dma protection control setting
Christian Lamparter [Sat, 17 Nov 2018 16:17:21 +0000 (17:17 +0100)]
dmaengine: dw-dmac: implement dma protection control setting

This patch adds a new device-tree property that allows to
specify the dma protection control bits for the all of the
DMA controller's channel uniformly.

Setting the "correct" bits can have a huge impact on the
PPC460EX and APM82181 that use this DMA engine in combination
with a DesignWare' SATA-II core (sata_dwc_460ex driver).

In the OpenWrt Forum, the user takimata reported that:
|It seems your patch unleashed the full power of the SATA port.
|Where I was previously hitting a really hard limit at around
|82 MB/s for reading and 27 MB/s for writing, I am now getting this:
|
|root@OpenWrt:/mnt# time dd if=/dev/zero of=tempfile bs=1M count=1024
|1024+0 records in
|1024+0 records out
|real    0m 13.65s
|user    0m 0.01s
|sys     0m 11.89s
|
|root@OpenWrt:/mnt# time dd if=tempfile of=/dev/null bs=1M count=1024
|1024+0 records in
|1024+0 records out
|real    0m 8.41s
|user    0m 0.01s
|sys     0m 4.70s
|
|This means: 121 MB/s reading and 75 MB/s writing!
|
|The drive is a WD Green WD10EARX taken from an older MBL Single.
|I repeated the test a few times with even larger files to rule out
|any caching, I'm still seeing the same great performance. OpenWrt is
|now completely on par with the original MBL firmware's performance.

Another user And.short reported:
|I can report that your fix worked! Boots up fine with two
|drives even with more partitions, and no more reboot on
|concurrent disk access!

A closer look into the sata_dwc_460ex code revealed that
the driver did initally set the correct protection control
bits. However, this feature was lost when the sata_dwc_460ex
driver was converted to the generic DMA driver framework.

BugLink: https://forum.openwrt.org/t/wd-mybook-live-duo-two-disks/16195/55
BugLink: https://forum.openwrt.org/t/wd-mybook-live-duo-two-disks/16195/50
Fixes: 8b3444852a2b ("sata_dwc_460ex: move to generic DMA driver")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodt-bindings: dmaengine: dw-dmac: add protection control property
Christian Lamparter [Sat, 17 Nov 2018 16:17:20 +0000 (17:17 +0100)]
dt-bindings: dmaengine: dw-dmac: add protection control property

This patch for the DesignWare AHB Central
Direct Memory Access Controller adds the dma
protection control property:
"snps,dma-protection-control"

as well as the properties specific values defines into
a new include file: include/dt-bindings/dma/dw-dmac.h

Note: The protection control signals are one-to-one
mapped to the AHB HPROT[1:3] signals for this controller.
The HPROT0 (Data Access) is always hardwired to 1.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodt-bindings: dmaengine: usb-dmac: Add binding for r8a774a1
Biju Das [Thu, 15 Nov 2018 11:59:14 +0000 (11:59 +0000)]
dt-bindings: dmaengine: usb-dmac: Add binding for r8a774a1

This patch adds binding for r8a774a1 (RZ/G2M).

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: rcar-dmac: Document R8A774A1 bindings
Fabrizio Castro [Thu, 15 Nov 2018 11:58:29 +0000 (11:58 +0000)]
dmaengine: rcar-dmac: Document R8A774A1 bindings

Renesas' RZ/G2M (R8A774A1) SoC has DMA controllers compatible
with this driver, therefore document RZ/G2M specific bindings.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: coh901318: Fix a double-lock bug
Jia-Ju Bai [Tue, 6 Nov 2018 03:33:48 +0000 (11:33 +0800)]
dmaengine: coh901318: Fix a double-lock bug

The function coh901318_alloc_chan_resources() calls spin_lock_irqsave()
before calling coh901318_config().
But coh901318_config() calls spin_lock_irqsave() again in its
definition, which may cause a double-lock bug.

Because coh901318_config() is only called by
coh901318_alloc_chan_resources(), the bug fix is to remove the
calls to spin-lock and -unlock functions in coh901318_config().

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: move size checks earlier in function
Alexandru Ardelean [Thu, 1 Nov 2018 16:07:16 +0000 (18:07 +0200)]
dmaengine: dmatest: move size checks earlier in function

There's no need to allocate all that memory if these sizes are invalid
anyway.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: use dmaengine_terminate_sync() instead
Alexandru Ardelean [Mon, 29 Oct 2018 09:23:36 +0000 (11:23 +0200)]
dmaengine: dmatest: use dmaengine_terminate_sync() instead

The `dmaengine_terminate_all()` is marked as deprecated, so update the test
with `dmaengine_terminate_sync()` which is the recommended alternative.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: dmatest: unmap data on a single code-path when xfer done
Alexandru Ardelean [Mon, 29 Oct 2018 10:08:08 +0000 (12:08 +0200)]
dmaengine: dmatest: unmap data on a single code-path when xfer done

After the DMA transfer is done, we don't need to call the un-mapping code
in 3 places. One is enough.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: imx-sdma: Use a single line for dma_alloc_coherent()
Fabio Estevam [Thu, 25 Oct 2018 17:52:36 +0000 (14:52 -0300)]
dmaengine: imx-sdma: Use a single line for dma_alloc_coherent()

Make the call to dma_alloc_coherent() to fit into a single line, which
helps readability.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: mediatek: Add MediaTek Command-Queue DMA controller for MT6765 SoC
Shun-Chih Yu [Thu, 18 Oct 2018 07:49:11 +0000 (15:49 +0800)]
dmaengine: mediatek: Add MediaTek Command-Queue DMA controller for MT6765 SoC

MediaTek Command-Queue DMA controller (CQDMA) on MT6765 SoC is dedicated
to memory-to-memory transfer through queue based descriptor management.

There are only 3 physical channels inside CQDMA, while the driver is
extended to support 32 virtual channels for multiple dma users to issue
dma requests onto the CQDMA simultaneously.

Signed-off-by: Shun-Chih Yu <shun-chih.yu@mediatek.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodt-bindings: dmaengine: usb-dmac: Add binding for r8a77470
Biju Das [Thu, 25 Oct 2018 14:53:37 +0000 (15:53 +0100)]
dt-bindings: dmaengine: usb-dmac: Add binding for r8a77470

This patch adds usb high-speed dmac binding for r8a77470 (RZ/G1C) SoC.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: ep93xx: fix some typo
Yangtao Li [Thu, 1 Nov 2018 15:35:43 +0000 (11:35 -0400)]
dmaengine: ep93xx: fix some typo

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: sa11x0: unexport sa11x0_dma_filter_fn and clean up
Russell King [Tue, 6 Nov 2018 13:45:10 +0000 (13:45 +0000)]
dmaengine: sa11x0: unexport sa11x0_dma_filter_fn and clean up

As we now have no users of sa11x0_dma_filter_fn() in the tree, we can
unexport this function, and remove the now unused header file.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: sh: convert to SPDX identifiers
Kuninori Morimoto [Thu, 8 Nov 2018 06:32:44 +0000 (06:32 +0000)]
dmaengine: sh: convert to SPDX identifiers

This patch updates license to use SPDX-License-Identifier
instead of verbose license text.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: bcm2835: Switch to SPDX identifier
Stefan Wahren [Sat, 10 Nov 2018 15:34:40 +0000 (16:34 +0100)]
dmaengine: bcm2835: Switch to SPDX identifier

Adopt the SPDX license identifier headers to ease license compliance
management.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
5 years agodmaengine: bcm2835: make license text and module license match
Stefan Wahren [Tue, 23 Oct 2018 11:06:07 +0000 (13:06 +0200)]
dmaengine: bcm2835: make license text and module license match

The license text is specifying GPL v2 or later but the MODULE_LICENSE
is set to GPL v2 which means GNU Public License v2 only. So choose the
license text as the correct one.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Florian Kauer <florian.kauer@koalo.de>
Acked-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
6 years agodmaengine: mmp_pdma: remove dma_slave_config direction usage
Vinod Koul [Thu, 25 Oct 2018 14:06:06 +0000 (15:06 +0100)]
dmaengine: mmp_pdma: remove dma_slave_config direction usage

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed

Signed-off-by: Vinod Koul <vkoul@kernel.org>
6 years agoLinux 4.20-rc1
Linus Torvalds [Sun, 4 Nov 2018 23:37:52 +0000 (15:37 -0800)]
Linux 4.20-rc1

6 years agoMerge tag 'tags/upstream-4.20-rc1' of git://git.infradead.org/linux-ubifs
Linus Torvalds [Sun, 4 Nov 2018 22:46:04 +0000 (14:46 -0800)]
Merge tag 'tags/upstream-4.20-rc1' of git://git.infradead.org/linux-ubifs

Pull UBIFS updates from Richard Weinberger:

 - Full filesystem authentication feature, UBIFS is now able to have the
   whole filesystem structure authenticated plus user data encrypted and
   authenticated.

 - Minor cleanups

* tag 'tags/upstream-4.20-rc1' of git://git.infradead.org/linux-ubifs: (26 commits)
  ubifs: Remove unneeded semicolon
  Documentation: ubifs: Add authentication whitepaper
  ubifs: Enable authentication support
  ubifs: Do not update inode size in-place in authenticated mode
  ubifs: Add hashes and HMACs to default filesystem
  ubifs: authentication: Authenticate super block node
  ubifs: Create hash for default LPT
  ubfis: authentication: Authenticate master node
  ubifs: authentication: Authenticate LPT
  ubifs: Authenticate replayed journal
  ubifs: Add auth nodes to garbage collector journal head
  ubifs: Add authentication nodes to journal
  ubifs: authentication: Add hashes to index nodes
  ubifs: Add hashes to the tree node cache
  ubifs: Create functions to embed a HMAC in a node
  ubifs: Add helper functions for authentication support
  ubifs: Add separate functions to init/crc a node
  ubifs: Format changes for authentication support
  ubifs: Store read superblock node
  ubifs: Drop write_node
  ...

6 years agoMerge tag 'nfs-for-4.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Sun, 4 Nov 2018 16:20:09 +0000 (08:20 -0800)]
Merge tag 'nfs-for-4.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Bugfix:
   - Fix build issues on architectures that don't provide 64-bit cmpxchg

  Cleanups:
   - Fix a spelling mistake"

* tag 'nfs-for-4.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: fix spelling mistake, EACCESS -> EACCES
  SUNRPC: Use atomic(64)_t for seq_send(64)

6 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Nov 2018 16:15:15 +0000 (08:15 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull more timer updates from Thomas Gleixner:
 "A set of commits for the new C-SKY architecture timers"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  dt-bindings: timer: gx6605s SOC timer
  clocksource/drivers/c-sky: Add gx6605s SOC system timer
  dt-bindings: timer: C-SKY Multi-processor timer
  clocksource/drivers/c-sky: Add C-SKY SMP timer

6 years agoMerge tag 'ntb-4.20' of git://github.com/jonmason/ntb
Linus Torvalds [Sun, 4 Nov 2018 16:12:44 +0000 (08:12 -0800)]
Merge tag 'ntb-4.20' of git://github.com/jonmason/ntb

Pull NTB updates from Jon Mason:
 "Fairly minor changes and bug fixes:

  NTB IDT thermal changes and hook into hwmon, ntb_netdev clean-up of
  private struct, and a few bug fixes"

* tag 'ntb-4.20' of git://github.com/jonmason/ntb:
  ntb: idt: Alter the driver info comments
  ntb: idt: Discard temperature sensor IRQ handler
  ntb: idt: Add basic hwmon sysfs interface
  ntb: idt: Alter temperature read method
  ntb_netdev: Simplify remove with client device drvdata
  NTB: transport: Try harder to alloc an aligned MW buffer
  ntb: ntb_transport: Mark expected switch fall-throughs
  ntb: idt: Set PCIe bus address to BARLIMITx
  NTB: ntb_hw_idt: replace IS_ERR_OR_NULL with regular NULL checks
  ntb: intel: fix return value for ndev_vec_mask()
  ntb_netdev: fix sleep time mismatch

6 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Nov 2018 01:37:09 +0000 (18:37 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
 "A memory (under-)allocation fix and a comment fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/topology: Fix off by one bug
  sched/rt: Update comment in pick_next_task_rt()

6 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Nov 2018 01:25:17 +0000 (18:25 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "A number of fixes and some late updates:

   - make in_compat_syscall() behavior on x86-32 similar to other
     platforms, this touches a number of generic files but is not
     intended to impact non-x86 platforms.

   - objtool fixes

   - PAT preemption fix

   - paravirt fixes/cleanups

   - cpufeatures updates for new instructions

   - earlyprintk quirk

   - make microcode version in sysfs world-readable (it is already
     world-readable in procfs)

   - minor cleanups and fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  compat: Cleanup in_compat_syscall() callers
  x86/compat: Adjust in_compat_syscall() to generic code under !COMPAT
  objtool: Support GCC 9 cold subfunction naming scheme
  x86/numa_emulation: Fix uniform-split numa emulation
  x86/paravirt: Remove unused _paravirt_ident_32
  x86/mm/pat: Disable preemption around __flush_tlb_all()
  x86/paravirt: Remove GPL from pv_ops export
  x86/traps: Use format string with panic() call
  x86: Clean up 'sizeof x' => 'sizeof(x)'
  x86/cpufeatures: Enumerate MOVDIR64B instruction
  x86/cpufeatures: Enumerate MOVDIRI instruction
  x86/earlyprintk: Add a force option for pciserial device
  objtool: Support per-function rodata sections
  x86/microcode: Make revision and processor flags world-readable

6 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Nov 2018 01:13:43 +0000 (18:13 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf updates and fixes from Ingo Molnar:
 "These are almost all tooling updates: 'perf top', 'perf trace' and
  'perf script' fixes and updates, an UAPI header sync with the merge
  window versions, license marker updates, much improved Sparc support
  from David Miller, and a number of fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (66 commits)
  perf intel-pt/bts: Calculate cpumode for synthesized samples
  perf intel-pt: Insert callchain context into synthesized callchains
  perf tools: Don't clone maps from parent when synthesizing forks
  perf top: Start display thread earlier
  tools headers uapi: Update linux/if_link.h header copy
  tools headers uapi: Update linux/netlink.h header copy
  tools headers: Sync the various kvm.h header copies
  tools include uapi: Update linux/mmap.h copy
  perf trace beauty: Use the mmap flags table generated from headers
  perf beauty: Wire up the mmap flags table generator to the Makefile
  perf beauty: Add a generator for MAP_ mmap's flag constants
  tools include uapi: Update asound.h copy
  tools arch uapi: Update asm-generic/unistd.h and arm64 unistd.h copies
  tools include uapi: Update linux/fs.h copy
  perf callchain: Honour the ordering of PERF_CONTEXT_{USER,KERNEL,etc}
  perf cs-etm: Correct CPU mode for samples
  perf unwind: Take pgoff into account when reporting elf to libdwfl
  perf top: Do not use overwrite mode by default
  perf top: Allow disabling the overwrite mode
  perf trace: Beautify mount's first pathname arg
  ...

6 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Nov 2018 01:12:09 +0000 (18:12 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Ingo Molnar:
 "An irqchip driver fix and a memory (over-)allocation fix"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/irq-mvebu-sei: Fix a NULL vs IS_ERR() bug in probe function
  irq/matrix: Fix memory overallocation

6 years agosched/topology: Fix off by one bug
Peter Zijlstra [Fri, 2 Nov 2018 13:22:25 +0000 (14:22 +0100)]
sched/topology: Fix off by one bug

With the addition of the NUMA identity level, we increased @level by
one and will run off the end of the array in the distance sort loop.

Fixed: 051f3ca02e46 ("sched/topology: Introduce NUMA identity node sched domain")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
6 years agoMerge branch 'core/urgent' into x86/urgent, to pick up objtool fix
Ingo Molnar [Sat, 3 Nov 2018 22:42:16 +0000 (23:42 +0100)]
Merge branch 'core/urgent' into x86/urgent, to pick up objtool fix

Signed-off-by: Ingo Molnar <mingo@kernel.org>
6 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Sat, 3 Nov 2018 19:13:57 +0000 (12:13 -0700)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "A few fixes who have come in near or during the merge window:

   - Removal of a VLA usage in Marvell mpp platform code

   - Enable some IPMI options for ARM64 servers by default, helps
     testing

   - Enable PREEMPT on 32-bit ARMv7 defconfig

   - Minor fix for stm32 DT (removal of an unused DMA property)

   - Bugfix for TI OMAP1-based ams-delta (-EINVAL -> IRQ_NOTCONNECTED)"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: dts: stm32: update HASH1 dmas property on stm32mp157c
  ARM: orion: avoid VLA in orion_mpp_conf
  ARM: defconfig: Update multi_v7 to use PREEMPT
  arm64: defconfig: Enable some IPMI configs
  soc: ti: QMSS: Fix usage of irq_set_affinity_hint
  ARM: OMAP1: ams-delta: Fix impossible .irq < 0

6 years agoMerge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64...
Linus Torvalds [Sat, 3 Nov 2018 17:55:23 +0000 (10:55 -0700)]
Merge tag 'arm64-upstream' of git://git./linux/kernel/git/arm64/linux

Pull more arm64 updates from Catalin Marinas:

 - fix W+X page (mark RO) allocated by the arm64 kprobes code

 - Makefile fix for .i files in out of tree modules

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: kprobe: make page to RO mode when allocate it
  arm64: kdump: fix small typo
  arm64: makefile fix build of .i file in external module case

6 years agoMerge tag 'dma-mapping-4.20-2' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Sat, 3 Nov 2018 17:53:33 +0000 (10:53 -0700)]
Merge tag 'dma-mapping-4.20-2' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:
 "Avoid compile warnings on non-default arm64 configs"

* tag 'dma-mapping-4.20-2' of git://git.infradead.org/users/hch/dma-mapping:
  arm64: fix warnings without CONFIG_IOMMU_DMA

6 years agoMerge tag 'kbuild-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...
Linus Torvalds [Sat, 3 Nov 2018 17:47:33 +0000 (10:47 -0700)]
Merge tag 'kbuild-v4.20-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - clean-up leftovers in Kconfig files

 - remove stale oldnoconfig and silentoldconfig targets

 - remove unneeded cc-fullversion and cc-name variables

 - improve merge_config script to allow overriding option prefix

* tag 'kbuild-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: remove cc-name variable
  kbuild: replace cc-name test with CONFIG_CC_IS_CLANG
  merge_config.sh: Allow to define config prefix
  kbuild: remove unused cc-fullversion variable
  kconfig: remove silentoldconfig target
  kconfig: remove oldnoconfig target
  powerpc: PCI_MSI needs PCI
  powerpc: remove CONFIG_MCA leftovers
  powerpc: remove CONFIG_PCI_QSPAN
  scsi: aha152x: rename the PCMCIA define

6 years agoMerge tag '4.20-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 3 Nov 2018 17:45:55 +0000 (10:45 -0700)]
Merge tag '4.20-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes and updates from Steve French:
 "Three small fixes (one Kerberos related, one for stable, and another
  fixes an oops in xfstest 377), two helpful debugging improvements,
  three patches for cifs directio and some minor cleanup"

* tag '4.20-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix signed/unsigned mismatch on aio_read patch
  cifs: don't dereference smb_file_target before null check
  CIFS: Add direct I/O functions to file_operations
  CIFS: Add support for direct I/O write
  CIFS: Add support for direct I/O read
  smb3: missing defines and structs for reparse point handling
  smb3: allow more detailed protocol info on open files for debugging
  smb3: on kerberos mount if server doesn't specify auth type use krb5
  smb3: add trace point for tree connection
  cifs: fix spelling mistake, EACCESS -> EACCES
  cifs: fix return value for cifs_listxattr

6 years agoMerge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 3 Nov 2018 17:35:52 +0000 (10:35 -0700)]
Merge branch 'work.afs' of git://git./linux/kernel/git/viro/vfs

Pull 9p fix from Al Viro:
 "Regression fix for net/9p handling of iov_iter; broken by braino when
  switching to iov_iter_is_kvec() et.al., spotted and fixed by Marc"

* 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  iov_iter: Fix 9p virtio breakage

6 years agoMerge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 3 Nov 2018 17:34:03 +0000 (10:34 -0700)]
Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi

Pull more SCSI updates from James Bottomley:
 "This is a set of minor small (and safe changes) that didn't make the
  initial pull request plus some bug fixes"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: mvsas: Remove set but not used variable 'id'
  scsi: qla2xxx: Remove two arguments from qlafx00_error_entry()
  scsi: qla2xxx: Make sure that qlafx00_ioctl_iosb_entry() initializes 'res'
  scsi: qla2xxx: Remove a set-but-not-used variable
  scsi: qla2xxx: Make qla2x00_sysfs_write_nvram() easier to analyze
  scsi: qla2xxx: Declare local functions 'static'
  scsi: qla2xxx: Improve several kernel-doc headers
  scsi: qla2xxx: Modify fall-through annotations
  scsi: 3w-sas: 3w-9xxx: Use unsigned char for cdb
  scsi: mvsas: Use dma_pool_zalloc
  scsi: target: Don't request modules that aren't even built
  scsi: target: Set response length for REPORT TARGET PORT GROUPS

6 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 3 Nov 2018 17:21:43 +0000 (10:21 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge more updates from Andrew Morton:

 - more ocfs2 work

 - various leftovers

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  memory_hotplug: cond_resched in __remove_pages
  bfs: add sanity check at bfs_fill_super()
  kernel/sysctl.c: remove duplicated include
  kernel/kexec_file.c: remove some duplicated includes
  mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask
  ocfs2: fix clusters leak in ocfs2_defrag_extent()
  ocfs2: dlmglue: clean up timestamp handling
  ocfs2: don't put and assigning null to bh allocated outside
  ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry
  ocfs2: don't use iocb when EIOCBQUEUED returns
  ocfs2: without quota support, avoid calling quota recovery
  ocfs2: remove ocfs2_is_o2cb_active()
  mm: thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings
  include/linux/notifier.h: SRCU: fix ctags
  mm: handle no memcg case in memcg_kmem_charge() properly

6 years agomemory_hotplug: cond_resched in __remove_pages
Michal Hocko [Fri, 2 Nov 2018 22:48:46 +0000 (15:48 -0700)]
memory_hotplug: cond_resched in __remove_pages

We have received a bug report that unbinding a large pmem (>1TB) can
result in a soft lockup:

  NMI watchdog: BUG: soft lockup - CPU#9 stuck for 23s! [ndctl:4365]
  [...]
  Supported: Yes
  CPU: 9 PID: 4365 Comm: ndctl Not tainted 4.12.14-94.40-default #1 SLE12-SP4
  Hardware name: Intel Corporation S2600WFD/S2600WFD, BIOS SE5C620.86B.01.00.0833.051120182255 05/11/2018
  task: ffff9cce7d4410c0 task.stack: ffffbe9eb1bc4000
  RIP: 0010:__put_page+0x62/0x80
  Call Trace:
   devm_memremap_pages_release+0x152/0x260
   release_nodes+0x18d/0x1d0
   device_release_driver_internal+0x160/0x210
   unbind_store+0xb3/0xe0
   kernfs_fop_write+0x102/0x180
   __vfs_write+0x26/0x150
   vfs_write+0xad/0x1a0
   SyS_write+0x42/0x90
   do_syscall_64+0x74/0x150
   entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  RIP: 0033:0x7fd13166b3d0

It has been reported on an older (4.12) kernel but the current upstream
code doesn't cond_resched in the hot remove code at all and the given
range to remove might be really large.  Fix the issue by calling
cond_resched once per memory section.

Link: http://lkml.kernel.org/r/20181031125840.23982-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Dan Williams <dan.j.williams@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agobfs: add sanity check at bfs_fill_super()
Tetsuo Handa [Fri, 2 Nov 2018 22:48:42 +0000 (15:48 -0700)]
bfs: add sanity check at bfs_fill_super()

syzbot is reporting too large memory allocation at bfs_fill_super() [1].
Since file system image is corrupted such that bfs_sb->s_start == 0,
bfs_fill_super() is trying to allocate 8MB of continuous memory. Fix
this by adding a sanity check on bfs_sb->s_start, __GFP_NOWARN and
printf().

[1] https://syzkaller.appspot.com/bug?id=16a87c236b951351374a84c8a32f40edbc034e96

Link: http://lkml.kernel.org/r/1525862104-3407-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+71c6b5d68e91149fc8a4@syzkaller.appspotmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Tigran Aivazian <aivazian.tigran@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agokernel/sysctl.c: remove duplicated include
Michael Schupikov [Fri, 2 Nov 2018 22:48:38 +0000 (15:48 -0700)]
kernel/sysctl.c: remove duplicated include

Remove one include of <linux/pipe_fs_i.h>.
No functional changes.

Link: http://lkml.kernel.org/r/20181004134223.17735-1-michael@schupikov.de
Signed-off-by: Michael Schupikov <michael@schupikov.de>
Reviewed-by: Richard Weinberger <richard@nod.at>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agokernel/kexec_file.c: remove some duplicated includes
zhong jiang [Fri, 2 Nov 2018 22:48:35 +0000 (15:48 -0700)]
kernel/kexec_file.c: remove some duplicated includes

We include kexec.h and slab.h twice in kexec_file.c. It's unnecessary.
hence just remove them.

Link: http://lkml.kernel.org/r/1537498098-19171-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agomm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask
Michal Hocko [Fri, 2 Nov 2018 22:48:31 +0000 (15:48 -0700)]
mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask

THP allocation mode is quite complex and it depends on the defrag mode.
This complexity is hidden in alloc_hugepage_direct_gfpmask from a large
part currently. The NUMA special casing (namely __GFP_THISNODE) is
however independent and placed in alloc_pages_vma currently. This both
adds an unnecessary branch to all vma based page allocation requests and
it makes the code more complex unnecessarily as well. Not to mention
that e.g. shmem THP used to do the node reclaiming unconditionally
regardless of the defrag mode until recently. This was not only
unexpected behavior but it was also hardly a good default behavior and I
strongly suspect it was just a side effect of the code sharing more than
a deliberate decision which suggests that such a layering is wrong.

Get rid of the thp special casing from alloc_pages_vma and move the
logic to alloc_hugepage_direct_gfpmask. __GFP_THISNODE is applied to the
resulting gfp mask only when the direct reclaim is not requested and
when there is no explicit numa binding to preserve the current logic.

Please note that there's also a slight difference wrt MPOL_BIND now. The
previous code would avoid using __GFP_THISNODE if the local node was
outside of policy_nodemask(). After this patch __GFP_THISNODE is avoided
for all MPOL_BIND policies. So there's a difference that if local node
is actually allowed by the bind policy's nodemask, previously
__GFP_THISNODE would be added, but now it won't be. From the behavior
POV this is still correct because the policy nodemask is used.

Link: http://lkml.kernel.org/r/20180925120326.24392-3-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: Zi Yan <zi.yan@cs.rutgers.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: fix clusters leak in ocfs2_defrag_extent()
Larry Chen [Fri, 2 Nov 2018 22:48:27 +0000 (15:48 -0700)]
ocfs2: fix clusters leak in ocfs2_defrag_extent()

ocfs2_defrag_extent() might leak allocated clusters.  When the file
system has insufficient space, the number of claimed clusters might be
less than the caller wants.  If that happens, the original code might
directly commit the transaction without returning clusters.

This patch is based on code in ocfs2_add_clusters_in_btree().

[akpm@linux-foundation.org: include localalloc.h, reduce scope of data_ac]
Link: http://lkml.kernel.org/r/20180904041621.16874-3-lchen@suse.com
Signed-off-by: Larry Chen <lchen@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: dlmglue: clean up timestamp handling
Arnd Bergmann [Fri, 2 Nov 2018 22:48:23 +0000 (15:48 -0700)]
ocfs2: dlmglue: clean up timestamp handling

The handling of timestamps outside of the 1970..2038 range in the dlm
glue is rather inconsistent: on 32-bit architectures, this has always
wrapped around to negative timestamps in the 1902..1969 range, while on
64-bit kernels all timestamps are interpreted as positive 34 bit numbers
in the 1970..2514 year range.

Now that the VFS code handles 64-bit timestamps on all architectures, we
can make the behavior more consistent here, and return the same result
that we had on 64-bit already, making the file system y2038 safe in the
process.  Outside of dlmglue, it already uses 64-bit on-disk timestamps
anway, so that part is fine.

For consistency, I'm changing ocfs2_pack_timespec() to clamp anything
outside of the supported range to the minimum and maximum values.  This
avoids a possible ambiguity of values before 1970 in particular, which
used to be interpreted as times at the end of the 2514 range previously.

Link: http://lkml.kernel.org/r/20180619155826.4106487-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: don't put and assigning null to bh allocated outside
Changwei Ge [Fri, 2 Nov 2018 22:48:19 +0000 (15:48 -0700)]
ocfs2: don't put and assigning null to bh allocated outside

ocfs2_read_blocks() and ocfs2_read_blocks_sync() are both used to read
several blocks from disk.  Currently, the input argument *bhs* can be
NULL or NOT.  It depends on the caller's behavior.  If the function
fails in reading blocks from disk, the corresponding bh will be assigned
to NULL and put.

Obviously, above process for non-NULL input bh is not appropriate.
Because the caller doesn't even know its bhs are put and re-assigned.

If buffer head is managed by caller, ocfs2_read_blocks and
ocfs2_read_blocks_sync() should not evaluate it to NULL.  It will cause
caller accessing illegal memory, thus crash.

Link: http://lkml.kernel.org/r/HK2PR06MB045285E0F4FBB561F9F2F9B3D5680@HK2PR06MB0452.apcprd06.prod.outlook.com
Signed-off-by: Changwei Ge <ge.changwei@h3c.com>
Reviewed-by: Guozhonghua <guozhonghua@h3c.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry
Changwei Ge [Fri, 2 Nov 2018 22:48:15 +0000 (15:48 -0700)]
ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry

Somehow, file system metadata was corrupted, which causes
ocfs2_check_dir_entry() to fail in function ocfs2_dir_foreach_blk_el().

According to the original design intention, if above happens we should
skip the problematic block and continue to retrieve dir entry.  But
there is obviouse misuse of brelse around related code.

After failure of ocfs2_check_dir_entry(), current code just moves to
next position and uses the problematic buffer head again and again
during which the problematic buffer head is released for multiple times.
I suppose, this a serious issue which is long-lived in ocfs2.  This may
cause other file systems which is also used in a the same host insane.

So we should also consider about bakcporting this patch into linux
-stable.

Link: http://lkml.kernel.org/r/HK2PR06MB045211675B43EED794E597B6D56E0@HK2PR06MB0452.apcprd06.prod.outlook.com
Signed-off-by: Changwei Ge <ge.changwei@h3c.com>
Suggested-by: Changkuo Shi <shi.changkuo@h3c.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: don't use iocb when EIOCBQUEUED returns
Changwei Ge [Fri, 2 Nov 2018 22:48:11 +0000 (15:48 -0700)]
ocfs2: don't use iocb when EIOCBQUEUED returns

When -EIOCBQUEUED returns, it means that aio_complete() will be called
from dio_complete(), which is an asynchronous progress against
write_iter.  Generally, IO is a very slow progress than executing
instruction, but we still can't take the risk to access a freed iocb.

And we do face a BUG crash issue.  Using the crash tool, iocb is
obviously freed already.

  crash> struct -x kiocb ffff881a350f5900
  struct kiocb {
    ki_filp = 0xffff881a350f5a80,
    ki_pos = 0x0,
    ki_complete = 0x0,
    private = 0x0,
    ki_flags = 0x0
  }

And the backtrace shows:
  ocfs2_file_write_iter+0xcaa/0xd00 [ocfs2]
  aio_run_iocb+0x229/0x2f0
  do_io_submit+0x291/0x540
  SyS_io_submit+0x10/0x20
  system_call_fastpath+0x16/0x75

Link: http://lkml.kernel.org/r/1523361653-14439-1-git-send-email-ge.changwei@h3c.com
Signed-off-by: Changwei Ge <ge.changwei@h3c.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: without quota support, avoid calling quota recovery
Guozhonghua [Fri, 2 Nov 2018 22:48:07 +0000 (15:48 -0700)]
ocfs2: without quota support, avoid calling quota recovery

During one dead node's recovery by other node, quota recovery work will
be queued.  We should avoid calling quota when it is not supported, so
check the quota flags.

Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA401071AC9FB@H3CMLB12-EX.srv.huawei-3com.com
Signed-off-by: guozhonghua <guozhonghua@h3c.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoocfs2: remove ocfs2_is_o2cb_active()
Gang He [Fri, 2 Nov 2018 22:48:03 +0000 (15:48 -0700)]
ocfs2: remove ocfs2_is_o2cb_active()

Remove ocfs2_is_o2cb_active().  We have similar functions to identify
which cluster stack is being used via osb->osb_cluster_stack.

Secondly, the current implementation of ocfs2_is_o2cb_active() is not
totally safe.  Based on the design of stackglue, we need to get
ocfs2_stack_lock before using ocfs2_stack related data structures, and
that active_stack pointer can be NULL in the case of mount failure.

Link: http://lkml.kernel.org/r/1495441079-11708-1-git-send-email-ghe@suse.com
Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Reviewed-by: Eric Ren <zren@suse.com>
Acked-by: Changwei Ge <ge.changwei@h3c.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agomm: thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings
Andrea Arcangeli [Fri, 2 Nov 2018 22:47:59 +0000 (15:47 -0700)]
mm: thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings

THP allocation might be really disruptive when allocated on NUMA system
with the local node full or hard to reclaim.  Stefan has posted an
allocation stall report on 4.12 based SLES kernel which suggests the
same issue:

  kvm: page allocation stalls for 194572ms, order:9, mode:0x4740ca(__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE|__GFP_MOVABLE|__GFP_DIRECT_RECLAIM), nodemask=(null)
  kvm cpuset=/ mems_allowed=0-1
  CPU: 10 PID: 84752 Comm: kvm Tainted: G        W 4.12.0+98-ph <a href="/view.php?id=1" title="[geschlossen] Integration Ramdisk" class="resolved">0000001</a> SLE15 (unreleased)
  Hardware name: Supermicro SYS-1029P-WTRT/X11DDW-NT, BIOS 2.0 12/05/2017
  Call Trace:
   dump_stack+0x5c/0x84
   warn_alloc+0xe0/0x180
   __alloc_pages_slowpath+0x820/0xc90
   __alloc_pages_nodemask+0x1cc/0x210
   alloc_pages_vma+0x1e5/0x280
   do_huge_pmd_wp_page+0x83f/0xf00
   __handle_mm_fault+0x93d/0x1060
   handle_mm_fault+0xc6/0x1b0
   __do_page_fault+0x230/0x430
   do_page_fault+0x2a/0x70
   page_fault+0x7b/0x80
   [...]
  Mem-Info:
  active_anon:126315487 inactive_anon:1612476 isolated_anon:5
   active_file:60183 inactive_file:245285 isolated_file:0
   unevictable:15657 dirty:286 writeback:1 unstable:0
   slab_reclaimable:75543 slab_unreclaimable:2509111
   mapped:81814 shmem:31764 pagetables:370616 bounce:0
   free:32294031 free_pcp:6233 free_cma:0
  Node 0 active_anon:254680388kB inactive_anon:1112760kB active_file:240648kB inactive_file:981168kB unevictable:13368kB isolated(anon):0kB isolated(file):0kB mapped:280240kB dirty:1144kB writeback:0kB shmem:95832kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 81225728kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
  Node 1 active_anon:250583072kB inactive_anon:5337144kB active_file:84kB inactive_file:0kB unevictable:49260kB isolated(anon):20kB isolated(file):0kB mapped:47016kB dirty:0kB writeback:4kB shmem:31224kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 31897600kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no

The defrag mode is "madvise" and from the above report it is clear that
the THP has been allocated for MADV_HUGEPAGA vma.

Andrea has identified that the main source of the problem is
__GFP_THISNODE usage:

: The problem is that direct compaction combined with the NUMA
: __GFP_THISNODE logic in mempolicy.c is telling reclaim to swap very
: hard the local node, instead of failing the allocation if there's no
: THP available in the local node.
:
: Such logic was ok until __GFP_THISNODE was added to the THP allocation
: path even with MPOL_DEFAULT.
:
: The idea behind the __GFP_THISNODE addition, is that it is better to
: provide local memory in PAGE_SIZE units than to use remote NUMA THP
: backed memory. That largely depends on the remote latency though, on
: threadrippers for example the overhead is relatively low in my
: experience.
:
: The combination of __GFP_THISNODE and __GFP_DIRECT_RECLAIM results in
: extremely slow qemu startup with vfio, if the VM is larger than the
: size of one host NUMA node. This is because it will try very hard to
: unsuccessfully swapout get_user_pages pinned pages as result of the
: __GFP_THISNODE being set, instead of falling back to PAGE_SIZE
: allocations and instead of trying to allocate THP on other nodes (it
: would be even worse without vfio type1 GUP pins of course, except it'd
: be swapping heavily instead).

Fix this by removing __GFP_THISNODE for THP requests which are
requesting the direct reclaim.  This effectivelly reverts 5265047ac301
on the grounds that the zone/node reclaim was known to be disruptive due
to premature reclaim when there was memory free.  While it made sense at
the time for HPC workloads without NUMA awareness on rare machines, it
was ultimately harmful in the majority of cases.  The existing behaviour
is similar, if not as widespare as it applies to a corner case but
crucially, it cannot be tuned around like zone_reclaim_mode can.  The
default behaviour should always be to cause the least harm for the
common case.

If there are specialised use cases out there that want zone_reclaim_mode
in specific cases, then it can be built on top.  Longterm we should
consider a memory policy which allows for the node reclaim like behavior
for the specific memory ranges which would allow a

[1] http://lkml.kernel.org/r/20180820032204.9591-1-aarcange@redhat.com

Mel said:

: Both patches look correct to me but I'm responding to this one because
: it's the fix.  The change makes sense and moves further away from the
: severe stalling behaviour we used to see with both THP and zone reclaim
: mode.
:
: I put together a basic experiment with usemem configured to reference a
: buffer multiple times that is 80% the size of main memory on a 2-socket
: box with symmetric node sizes and defrag set to "always".  The defrag
: setting is not the default but it would be functionally similar to
: accessing a buffer with madvise(MADV_HUGEPAGE).  Usemem is configured to
: reference the buffer multiple times and while it's not an interesting
: workload, it would be expected to complete reasonably quickly as it fits
: within memory.  The results were;
:
: usemem
:                                   vanilla           noreclaim-v1
: Amean     Elapsd-1       42.78 (   0.00%)       26.87 (  37.18%)
: Amean     Elapsd-3       27.55 (   0.00%)        7.44 (  73.00%)
: Amean     Elapsd-4        5.72 (   0.00%)        5.69 (   0.45%)
:
: This shows the elapsed time in seconds for 1 thread, 3 threads and 4
: threads referencing buffers 80% the size of memory.  With the patches
: applied, it's 37.18% faster for the single thread and 73% faster with two
: threads.  Note that 4 threads showing little difference does not indicate
: the problem is related to thread counts.  It's simply the case that 4
: threads gets spread so their workload mostly fits in one node.
:
: The overall view from /proc/vmstats is more startling
:
:                          4.19.0-rc1  4.19.0-rc1
:                             vanillanoreclaim-v1r1
: Minor Faults               35593425      708164
: Major Faults                 484088          36
: Swap Ins                    3772837           0
: Swap Outs                   3932295           0
:
: Massive amounts of swap in/out without the patch
:
: Direct pages scanned        6013214           0
: Kswapd pages scanned              0           0
: Kswapd pages reclaimed            0           0
: Direct pages reclaimed      4033009           0
:
: Lots of reclaim activity without the patch
:
: Kswapd efficiency              100%        100%
: Kswapd velocity               0.000       0.000
: Direct efficiency               67%        100%
: Direct velocity           11191.956       0.000
:
: Mostly from direct reclaim context as you'd expect without the patch.
:
: Page writes by reclaim  3932314.000       0.000
: Page writes file                 19           0
: Page writes anon            3932295           0
: Page reclaim immediate        42336           0
:
: Writes from reclaim context is never good but the patch eliminates it.
:
: We should never have default behaviour to thrash the system for such a
: basic workload.  If zone reclaim mode behaviour is ever desired but on a
: single task instead of a global basis then the sensible option is to build
: a mempolicy that enforces that behaviour.

This was a severe regression compared to previous kernels that made
important workloads unusable and it starts when __GFP_THISNODE was
added to THP allocations under MADV_HUGEPAGE.  It is not a significant
risk to go to the previous behavior before __GFP_THISNODE was added, it
worked like that for years.

This was simply an optimization to some lucky workloads that can fit in
a single node, but it ended up breaking the VM for others that can't
possibly fit in a single node, so going back is safe.

[mhocko@suse.com: rewrote the changelog based on the one from Andrea]
Link: http://lkml.kernel.org/r/20180925120326.24392-2-mhocko@kernel.org
Fixes: 5265047ac301 ("mm, thp: really limit transparent hugepage allocation to local node")
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Stefan Priebe <s.priebe@profihost.ag>
Debugged-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Mel Gorman <mgorman@techsingularity.net>
Tested-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Zi Yan <zi.yan@cs.rutgers.edu>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: <stable@vger.kernel.org> [4.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoinclude/linux/notifier.h: SRCU: fix ctags
Sam Protsenko [Fri, 2 Nov 2018 22:47:53 +0000 (15:47 -0700)]
include/linux/notifier.h: SRCU: fix ctags

ctags indexing ("make tags" command) throws this warning:

    ctags: Warning: include/linux/notifier.h:125:
    null expansion of name pattern "\1"

This is the result of DEFINE_PER_CPU() macro expansion.  Fix that by
getting rid of line break.

Similar fix was already done in commit 25528213fe9f ("tags: Fix
DEFINE_PER_CPU expansions"), but this one probably wasn't noticed.

Link: http://lkml.kernel.org/r/20181030202808.28027-1-semen.protsenko@linaro.org
Fixes: 9c80172b902d ("kernel/SRCU: provide a static initializer")
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agomm: handle no memcg case in memcg_kmem_charge() properly
Roman Gushchin [Fri, 2 Nov 2018 22:47:49 +0000 (15:47 -0700)]
mm: handle no memcg case in memcg_kmem_charge() properly

Mike Galbraith reported a regression caused by the commit 9b6f7e163cd0
("mm: rework memcg kernel stack accounting") on a system with
"cgroup_disable=memory" boot option: the system panics with the following
stack trace:

  BUG: unable to handle kernel NULL pointer dereference at 00000000000000f8
  PGD 0 P4D 0
  Oops: 0002 [#1] PREEMPT SMP PTI
  CPU: 0 PID: 1 Comm: systemd Not tainted 4.19.0-preempt+ #410
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20180531_142017-buildhw-08.phx2.fed4
  RIP: 0010:page_counter_try_charge+0x22/0xc0
  Code: 41 5d c3 c3 0f 1f 40 00 0f 1f 44 00 00 48 85 ff 0f 84 a7 00 00 00 41 56 48 89 f8 49 89 fe 49
  Call Trace:
   try_charge+0xcb/0x780
   memcg_kmem_charge_memcg+0x28/0x80
   memcg_kmem_charge+0x8b/0x1d0
   copy_process.part.41+0x1ca/0x2070
   _do_fork+0xd7/0x3d0
   do_syscall_64+0x5a/0x180
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

The problem occurs because get_mem_cgroup_from_current() returns the NULL
pointer if memory controller is disabled.  Let's check if this is a case
at the beginning of memcg_kmem_charge() and just return 0 if
mem_cgroup_disabled() returns true.  This is how we handle this case in
many other places in the memory controller code.

Link: http://lkml.kernel.org/r/20181029215123.17830-1-guro@fb.com
Fixes: 9b6f7e163cd0 ("mm: rework memcg kernel stack accounting")
Signed-off-by: Roman Gushchin <guro@fb.com>
Reported-by: Mike Galbraith <efault@gmx.de>
Acked-by: Rik van Riel <riel@surriel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoMerge tag 'omap-for-v4.20/omap1-fix-signed' of git://git.kernel.org/pub/scm/linux...
Olof Johansson [Sat, 3 Nov 2018 05:31:40 +0000 (22:31 -0700)]
Merge tag 'omap-for-v4.20/omap1-fix-signed' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

Fix for omap1 ams-delta irq

We need to use IRQ_NOTCONNECTED instead of -EINVAL for
ams_delta_modem_ports irq.

* tag 'omap-for-v4.20/omap1-fix-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP1: ams-delta: Fix impossible .irq < 0

Signed-off-by: Olof Johansson <olof@lixom.net>
6 years agoARM: dts: stm32: update HASH1 dmas property on stm32mp157c
Alexandre Torgue [Thu, 20 Sep 2018 16:34:17 +0000 (18:34 +0200)]
ARM: dts: stm32: update HASH1 dmas property on stm32mp157c

Remove unused parameter from HASH1 dmas property on stm32mp157c SoC.

Fixes: 1e726a40e067 ("ARM: dts: stm32: Add HASH support on stm32mp157c")
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
[Olof: Bug doesn't cause any harm, so shouldn't need stable backport]
Signed-off-by: Olof Johansson <olof@lixom.net>
6 years agoARM: orion: avoid VLA in orion_mpp_conf
Arnd Bergmann [Fri, 5 Oct 2018 16:15:49 +0000 (18:15 +0200)]
ARM: orion: avoid VLA in orion_mpp_conf

Testing randconfig builds found an instance of a VLA that was
missed when determining that we have removed them all:

arch/arm/plat-orion/mpp.c: In function 'orion_mpp_conf':
arch/arm/plat-orion/mpp.c:31:2: error: ISO C90 forbids variable length array 'mpp_ctrl' [-Werror=vla]

This one is fairly straightforward: we know what all three
callers are, and the maximum length is not very long.

Fixes: 68664695ae57 ("Makefile: Globally enable VLA warning")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
6 years agoiov_iter: Fix 9p virtio breakage
Marc Zyngier [Fri, 2 Nov 2018 17:16:51 +0000 (17:16 +0000)]
iov_iter: Fix 9p virtio breakage

When switching to the new iovec accessors, a negation got subtly
dropped, leading to 9p being remarkably broken (here with kvmtool):

[    7.430941] VFS: Mounted root (9p filesystem) on device 0:15.
[    7.432080] devtmpfs: mounted
[    7.432717] Freeing unused kernel memory: 1344K
[    7.433658] Run /virt/init as init process
  Warning: unable to translate guest address 0x7e00902ff000 to host
  Warning: unable to translate guest address 0x7e00902fefc0 to host
  Warning: unable to translate guest address 0x7e00902ff000 to host
  Warning: unable to translate guest address 0x7e008febef80 to host
  Warning: unable to translate guest address 0x7e008febf000 to host
  Warning: unable to translate guest address 0x7e008febef00 to host
  Warning: unable to translate guest address 0x7e008febf000 to host
[    7.436376] Kernel panic - not syncing: Requested init /virt/init failed (error -8).
[    7.437554] CPU: 29 PID: 1 Comm: swapper/0 Not tainted 4.19.0-rc8-02267-g00e23707442a #291
[    7.439006] Hardware name: linux,dummy-virt (DT)
[    7.439902] Call trace:
[    7.440387]  dump_backtrace+0x0/0x148
[    7.441104]  show_stack+0x14/0x20
[    7.441768]  dump_stack+0x90/0xb4
[    7.442425]  panic+0x120/0x27c
[    7.443036]  kernel_init+0xa4/0x100
[    7.443725]  ret_from_fork+0x10/0x18
[    7.444444] SMP: stopping secondary CPUs
[    7.445391] Kernel Offset: disabled
[    7.446169] CPU features: 0x0,23000438
[    7.446974] Memory Limit: none
[    7.447645] ---[ end Kernel panic - not syncing: Requested init /virt/init failed (error -8). ]---

Restoring the missing "!" brings the guest back to life.

Fixes: 00e23707442a ("iov_iter: Use accessor function")
Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
6 years agoMerge branch 'clockevents/4.20-rc1' of https://git.linaro.org/people/daniel.lezcano...
Thomas Gleixner [Fri, 2 Nov 2018 20:58:39 +0000 (21:58 +0100)]
Merge branch 'clockevents/4.20-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/urgent

Pull clockevent update from Daniel Lezcano:

 - Add the per cpu timer for the c-sky architecture (Guo Ren)

 - Add the global timer for the c-sky architecture (Guo Ren)

6 years agocifs: fix signed/unsigned mismatch on aio_read patch
Steve French [Thu, 1 Nov 2018 15:54:32 +0000 (10:54 -0500)]
cifs: fix signed/unsigned mismatch on aio_read patch

The patch "CIFS: Add support for direct I/O read" had
a signed/unsigned mismatch (ssize_t vs. size_t) in the
return from one function.  Similar trivial change
in aio_write

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
6 years agocifs: don't dereference smb_file_target before null check
Colin Ian King [Thu, 1 Nov 2018 13:14:30 +0000 (13:14 +0000)]
cifs: don't dereference smb_file_target before null check

There is a null check on dst_file->private data which suggests
it can be potentially null. However, before this check, pointer
smb_file_target is derived from dst_file->private and dereferenced
in the call to tlink_tcon, hence there is a potential null pointer
deference.

Fix this by assigning smb_file_target and target_tcon after the
null pointer sanity checks.

Detected by CoverityScan, CID#1475302 ("Dereference before null check")

Fixes: 04b38d601239 ("vfs: pull btrfs clone API to vfs layer")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
6 years agoCIFS: Add direct I/O functions to file_operations
Long Li [Wed, 31 Oct 2018 22:13:11 +0000 (22:13 +0000)]
CIFS: Add direct I/O functions to file_operations

With direct read/write functions implemented, add them to file_operations.

Dircet I/O is used under two conditions:
1. When mounting with "cache=none", CIFS uses direct I/O for all user file
data transfer.
2. When opening a file with O_DIRECT, CIFS uses direct I/O for all data
transfer on this file.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
6 years agoCIFS: Add support for direct I/O write
Long Li [Wed, 31 Oct 2018 22:13:10 +0000 (22:13 +0000)]
CIFS: Add support for direct I/O write

With direct I/O write, user supplied buffers are pinned to the memory and data
are transferred directly from user buffers to the transport layer.

Change in v3: add support for kernel AIO

Change in v4:
Refactor common write code to __cifs_writev for direct and non-direct I/O.
Retry on direct I/O failure.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
6 years agoCIFS: Add support for direct I/O read
Long Li [Wed, 31 Oct 2018 22:13:09 +0000 (22:13 +0000)]
CIFS: Add support for direct I/O read

With direct I/O read, we transfer the data directly from transport layer to
the user data buffer.

Change in v3: add support for kernel AIO

Change in v4:
Refactor common read code to __cifs_readv for direct and non-direct I/O.
Retry on direct I/O failure.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
6 years agosmb3: missing defines and structs for reparse point handling
Steve French [Wed, 31 Oct 2018 16:24:33 +0000 (11:24 -0500)]
smb3: missing defines and structs for reparse point handling

We were missing some structs from MS-FSCC relating to
reparse point handling.  Add them to protocol defines
in smb2pdu.h

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
6 years agosmb3: allow more detailed protocol info on open files for debugging
Steve French [Wed, 31 Oct 2018 00:50:31 +0000 (19:50 -0500)]
smb3: allow more detailed protocol info on open files for debugging

In order to debug complex problems it is often helpful to
have detailed information on the client and server view
of the open file information.  Add the ability for root to
view the list of smb3 open files and dump the persistent
handle and other info so that it can be more easily
correlated with server logs.

Sample output from "cat /proc/fs/cifs/open_files"

 # Version:1
 # Format:
 # <tree id> <persistent fid> <flags> <count> <pid> <uid> <filename> <mid>
 0x5 0x800000378 0x8000 1 7704 0 some-file 0x14
 0xcb903c0c 0x84412e67 0x8000 1 7754 1001 rofile 0x1a6d
 0xcb903c0c 0x9526b767 0x8000 1 7720 1000 file 0x1a5b
 0xcb903c0c 0x9ce41a21 0x8000 1 7715 0 smallfile 0xd67

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
6 years agosmb3: on kerberos mount if server doesn't specify auth type use krb5
Steve French [Sun, 28 Oct 2018 18:13:23 +0000 (13:13 -0500)]
smb3: on kerberos mount if server doesn't specify auth type use krb5

Some servers (e.g. Azure) do not include a spnego blob in the SMB3
negotiate protocol response, so on kerberos mounts ("sec=krb5")
we can fail, as we expected the server to list its supported
auth types (OIDs in the spnego blob in the negprot response).
Change this so that on krb5 mounts we default to trying krb5 if the
server doesn't list its supported protocol mechanisms.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Stable <stable@vger.kernel.org>
6 years agosmb3: add trace point for tree connection
Steve French [Sun, 28 Oct 2018 05:47:11 +0000 (00:47 -0500)]
smb3: add trace point for tree connection

In debugging certain scenarios, especially reconnect cases,
it can be helpful to have a dynamic trace point for the
result of tree connect.  See sample output below
from a reconnect event. The new event is 'smb3_tcon'

            TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
               | |       |   ||||       |         |
           cifsd-6071  [001] ....  2659.897923: smb3_reconnect: server=localhost current_mid=0xa
     kworker/1:1-71    [001] ....  2666.026342: smb3_cmd_done:  sid=0x0 tid=0x0 cmd=0 mid=0
     kworker/1:1-71    [001] ....  2666.026576: smb3_cmd_err:  sid=0xc49e1787 tid=0x0 cmd=1 mid=1 status=0xc0000016 rc=-5
     kworker/1:1-71    [001] ....  2666.031677: smb3_cmd_done:  sid=0xc49e1787 tid=0x0 cmd=1 mid=2
     kworker/1:1-71    [001] ....  2666.031921: smb3_cmd_done:  sid=0xc49e1787 tid=0x6e78f05f cmd=3 mid=3
     kworker/1:1-71    [001] ....  2666.031923: smb3_tcon: xid=0 sid=0xc49e1787 tid=0x0 unc_name=\\localhost\test rc=0
     kworker/1:1-71    [001] ....  2666.032097: smb3_cmd_done:  sid=0xc49e1787 tid=0x6e78f05f cmd=11 mid=4
     kworker/1:1-71    [001] ....  2666.032265: smb3_cmd_done:  sid=0xc49e1787 tid=0x7912332f cmd=3 mid=5
     kworker/1:1-71    [001] ....  2666.032266: smb3_tcon: xid=0 sid=0xc49e1787 tid=0x0 unc_name=\\localhost\IPC$ rc=0
     kworker/1:1-71    [001] ....  2666.032386: smb3_cmd_done:  sid=0xc49e1787 tid=0x7912332f cmd=11 mid=6

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
6 years agocifs: fix spelling mistake, EACCESS -> EACCES
Colin Ian King [Fri, 26 Oct 2018 18:07:21 +0000 (19:07 +0100)]
cifs: fix spelling mistake, EACCESS -> EACCES

Trivial fix to a spelling mistake of the error access name EACCESS,
rename to EACCES

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
6 years agocifs: fix return value for cifs_listxattr
Ronnie Sahlberg [Thu, 25 Oct 2018 05:43:36 +0000 (15:43 +1000)]
cifs: fix return value for cifs_listxattr

If the application buffer was too small to fit all the names
we would still count the number of bytes and return this for
listxattr. This would then trigger a BUG in usercopy.c

Fix the computation of the size so that we return -ERANGE
correctly when the buffer is too small.

This fixes the kernel BUG for xfstest generic/377

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
6 years agodt-bindings: timer: gx6605s SOC timer
Guo Ren [Fri, 2 Nov 2018 16:51:31 +0000 (00:51 +0800)]
dt-bindings: timer: gx6605s SOC timer

Dt-bindings doc for gx6605s SOC's system timer.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
6 years agoclocksource/drivers/c-sky: Add gx6605s SOC system timer
Guo Ren [Fri, 2 Nov 2018 16:51:30 +0000 (00:51 +0800)]
clocksource/drivers/c-sky: Add gx6605s SOC system timer

The driver is for gx6605s SOC system timer and there are two
same timers in gx6605s. We use one for clkevt and another one for
clksrc.

The timer is mmio map to access, so we need give mmio address in dts.

The counter at 0x0  offset is clock event.
The counter at 0x40 offset is clock source.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
6 years agodt-bindings: timer: C-SKY Multi-processor timer
Guo Ren [Fri, 2 Nov 2018 16:51:29 +0000 (00:51 +0800)]
dt-bindings: timer: C-SKY Multi-processor timer

Dt-bingdings doc for C-SKY SMP system setting.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
6 years agoclocksource/drivers/c-sky: Add C-SKY SMP timer
Guo Ren [Fri, 2 Nov 2018 16:51:28 +0000 (00:51 +0800)]
clocksource/drivers/c-sky: Add C-SKY SMP timer

The driver is for C-SKY SMP timer. It only supports oneshot event
and 32bit overflow for clocksource. Per cpu core has one timer and
all timers share one clock-counter-input from the same clocksource.

This use mfcr&mtcr instructions to access the regs.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
6 years agoARM: defconfig: Update multi_v7 to use PREEMPT
Linus Walleij [Fri, 19 Oct 2018 09:24:26 +0000 (11:24 +0200)]
ARM: defconfig: Update multi_v7 to use PREEMPT

Using CONFIG_PREEMPT as preemption model for ARMv7 systems
appear to be the most reasonable default.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>