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2016-05-09can: ifi: Increment TX counters only on real transmissionMarek Vasut
Only increment the TX counters in the irq handler if a CAN message was sent. The current code incremented the counters also if the TX FIFO empty interrupt happened, which is incorrect. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: ifi: Treat CAN_CTRLMODE_FD_NON_ISO correctlyMarek Vasut
The CAN_CTRLMODE_FD flag is set for both ISO and BOSCH CANFD mode, while the CAN_CTRLMODE_FD_NON_ISO is additional flag which is only set for CANFD-BOSCH mode. Fix the handling of the flags to reflect this. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Reviewed-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: ifi: Unify timing constantsMarek Vasut
There is no distinction between bittiming constants for the slow and fast part of the CANFD operation on this controller, so just use one single bittiming constant set. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: ifi: Update timing configuration codeMarek Vasut
The updated documentation regarding the IFI CANFD core from April 2016 adds more details regarding the timing calculation. There is no longer any distinction in the timing calculation between CANFD and CAN2.0, but instead there are two timing modes -- 4_12_6_6 and 7_9_8_8 -- where the numbers mean the width in bits of the SJW/Prescaler/TimeA/TimeB fields. The code uses 7_9_8_8 mode, which allows more fine-grained control over the timing. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: ifi: Start NAPI poll on bus warning tooMarek Vasut
Start the NAPI polling in case the bus warning interrupt happens, since it is the poll function which checks and reports the warning. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: gs_usb: modify the usb device table to use only the first usb interfaceMaximilian Schneider
Modified the USB device table to use only the first USB interface, as is the case with GS USB devices. This allows other GS USB compatible devices to be more flexible with their remaining interfaces. Signed-off-by: Maximilian Schneider <max@schneidersoft.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: janz-ican3: error handling for CAL/CANopen firmwareAndreas Gröger
My patch of May 2015 was missing the changed handling of error indications. With CAL/CANopen firmware the NMTS-SlaveEventIndication must be used instead of CAN-EventIndication. An appropriate slave node must be configured to report the errors. In our department (about 15 development systems with Janz ICAN3- modules with firmware 1.48, my system also with firmware ICANOS 1.35) we use the driver with this patch for about one year: no known problems. Signed-off-by: Andreas Gröger <andreas24groeger@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: fix handling of unmodifiable configuration optionsOliver Hartkopp
As described in 'can: m_can: tag current CAN FD controllers as non-ISO' (6cfda7fbebe) it is possible to define fixed configuration options by setting the according bit in 'ctrlmode' and clear it in 'ctrlmode_supported'. This leads to the incovenience that the fixed configuration bits can not be passed by netlink even when they have the correct values (e.g. non-ISO, FD). This patch fixes that issue and not only allows fixed set bit values to be set again but now requires(!) to provide these fixed values at configuration time. A valid CAN FD configuration consists of a nominal/arbitration bittiming, a data bittiming and a control mode with CAN_CTRLMODE_FD set - which is now enforced by a new can_validate() function. This fix additionally removed the inconsistency that was prohibiting the support of 'CANFD-only' controller drivers, like the RCar CAN FD. For this reason a new helper can_set_static_ctrlmode() has been introduced to provide a proper interface to handle static enabled CAN controller options. Reported-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Reviewed-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Cc: <stable@vger.kernel.org> # >= 3.18 Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: mcp251x: Replace create_freezable_workqueue with alloc_workqueueAmitoj Kaur Chawla
Replace scheduled to be removed create_freezable_workqueue with alloc_workqueue. priv->wq should be explicitly set as freezable to ensure it is frozen in the suspend sequence and work items are drained so that no new work item starts execution until thawed. Thus, use of WQ_FREEZABLE flag here is required. WQ_MEM_RECLAIM flag has been set here to ensure forward progress regardless of memory pressure. The order of execution is not important so set @max_active as 0. Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: sja1000: plx_pci: Add support for Marathon CAN-bus-PCIe cardNikita Edward Baruzdin
This patch adds support for the Marathon CAN-bus-PCIe card to the sja1000 driver. For more information see: http://can.marathon.ru/page/devices/can-bus-pcie Signed-off-by: Nikita Edward Baruzdin <nebaruzdin@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09can: sja1000: Fix error location forwardingAlexander Gerasiov
According to SJA1000 documentation the location of error is available regardless of an error type. Therefore it should always be forwarded to SocketCAN. Signed-off-by: Nikita Edward Baruzdin <nebaruzdin@lvk.cs.msu.su> Signed-off-by: Alexander GQ Gerasiov <gq@cs.msu.su> Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2016-05-09crypto: testmgr - Use kmalloc memory for RSA inputHerbert Xu
As akcipher uses an SG interface, you must not use vmalloc memory as input for it. This patch fixes testmgr to copy the vmalloc test vectors to kmalloc memory before running the test. This patch also removes a superfluous sg_virt call in do_test_rsa. Cc: <stable@vger.kernel.org> Reported-by: Anatoly Pugachev <matorola@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-05-09arm/dst: Add Aspeed ast2500 device treeJoel Stanley
This adds a common device tree for all fifth generation Aspeed systems, and a board specific device tree for the ast2500 evaluation board. Signed-off-by: Joel Stanley <joel@jms.id.au>
2016-05-09arm/dts: Add Aspeed ast2400 device treeJoel Stanley
A common device tree for all forth gen/ast2400 systems and a board specific dts for the Palmetto OpenPower developemnt machine which was used for testing. Signed-off-by: Joel Stanley <joel@jms.id.au>
2016-05-09arm: Add Aspeed machineJoel Stanley
Aspeed devices are a common Baseboard Management Controller (BMC) system on chip containing an ARM9 or ARM11 core, off-chip DDR RAM and support for a large number of peripherals. This patch adds basic support for the ast2400 and ast2500 machines, capable of booting to a prompt in QEMU (-M palmetto-bmc), on an Palmetto OpenPower development machine, and on the ast2500 EVB. Signed-off-by: Joel Stanley <joel@jms.id.au>
2016-05-09Merge 4.6-rc7 into tty-nextGreg Kroah-Hartman
We want the pty fixes in here as well so that patches can build on it. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09Merge 4.6-rc7 into char-misc-testingGreg Kroah-Hartman
This resolves a merge issue with drivers/hv/ring_buffer.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09Merge 4.6-rc7 into usb-nextGreg Kroah-Hartman
We want the USB fixes in here to resolve merge issues and make it easier for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09Merge tag 'usb-serial-4.6-rc7' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-next Johan writes: USB-serial fixes for v4.6-rc7 Here are some more new device ids. Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-09mfd: as3722: Use devm_mfd_add_devices and devm_regmap_add_irq_chipLaxman Dewangan
Use devm_mfd_add_devices() for adding MFD child devices and devm_regmap_add_irq_chip() for IRQ chip registration. This reduces the error code path and .remove callback for removing MFD child devices and deleting IRQ chip data. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: twl4030-power: Remove driver path in file commentJavier Martinez Canillas
The driver's file path in the comment is wrong, so just remove it since these tends to get out of date and they serve very little purpose. Suggested-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09MAINTAINERS: Add entry for X-Powers AXP family PMIC driversChen-Yu Tsai
Add an entry for X-Powers AXP family PMIC drivers and list myself as maintainer. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: smsc-ece1099: Remove unnecessarily remove callbackLaxman Dewangan
SMSC MFD driver does not add any MFD child devices via mfd_add_devices() and hence it is not required to call mfd_remove_devices() to remove MFD child devices. Remove the call of the API mfd_remove_devices() which will result as remove of .remove callback for driver. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: Use IS_ENABLED(CONFIG_FOO) instead of checking FOO || FOO_MODULEJavier Martinez Canillas
The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either built-in or as a module, use that macro instead of open coding the same. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: twl6040: Disable and unprepare clk32k in twl6040_power() error pathJavier Martinez Canillas
The clk32k clock is prepared and enabled in twl6040_power() but the clock is left enabled in case of an error while it should be disable/unprepared. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: twl6040: Check clk_prepare_enable() return value in twl6040_power()Javier Martinez Canillas
The clk_prepare_enable() function can fail so check the return value and propagate the error in case of a failure. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: tps6105x: Remove linux/regulator/driver.h includeMark Brown
This driver makes no use of linux/regulator/driver.h which should only be used by drivers implementing a regulator. Since it's unlikely to ever need anything from there remove the include. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: intel_quark_i2c_gpio: Remove CLK_IS_ROOTStephen Boyd
This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate CLK_IS_ROOT", 2016-02-02) so remove it. Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: intel-lpss: Remove CLK_IS_ROOTStephen Boyd
This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate CLK_IS_ROOT", 2016-02-02) so remove it. Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: intel-lpss: Save register context on suspendHeikki Krogerus
All configurations are lost and the registers will have default values when the hardware is suspended and resumed, so saving the private register space context on suspend, and restoring it on resume. Fixes: 4b45efe85263 (mfd: Add support for Intel Sunrisepoint LPSS devices) Cc: stable@vger.kernel.org # v4.3+ Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: wm8400-core: Delete wm8400_reg_read()Dan Carpenter
There was a static checker warning in wm8400_reg_read() because we were returning u16 and that can't hold the negative error codes. The function isn't used, so let's just delete it. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: arizona: Update device ordering to allow clean driver removalCharles Keepax
Since this commit: commit b9a8a271c38f ("mfd: make mfd_remove_devices() iterate in reverse order") The order in which the MFD children remove has been reversed, as our driver contains some dependencies between the devices we need to make some changes to ensure the driver unloads cleanly. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09mfd: mt6397: IRQ domain should initialize before mfd_add_devices()Henry Chen
Some sub driver like RTC module need irq domain from parent to create irq mapping when driver initialize. so move mt6397_irq_init() before mfd_add_devices(). Acked-by: John Crispin <blogic@openwrt.org> Signed-off-by: Henry Chen <henryc.chen@mediatek.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-05-09sched/core: Fix comment typo in wake_q_add()Davidlohr Bueso
... the comment clearly refers to wake_up_q(), and not wake_up_list(). Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dave@stgolabs.net Link: http://lkml.kernel.org/r/1462766290-28664-1-git-send-email-dave@stgolabs.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-09sched/core: Remove unused variableMuhammad Falak R Wani
Remove unused variable 'ret', and directly return 0. Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1462441879-10092-1-git-send-email-falakreyaz@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-09ALSA: hda - Fix white noise on Asus UX501VW headsetKaho Ng
For reducing the noise from the headset output on ASUS UX501VW, call the existing fixup, alc_fixup_headset_mode_alc668(), additionally. Thread: https://bbs.archlinux.org/viewtopic.php?id=209554 Signed-off-by: Kaho Ng <ngkaho1234@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-05-09Merge branch 'mlx5-build-fix'David S. Miller
Saeed Mahameed says: ==================== net/mlx5e: Kconfig fixes for VxLAN Reposting to net the build errors fixes posted by Arnd last week. Originally Arnd posted those fixes to net-next, while the issue is also seen in net. For net-next a different approach is required for fixing the issue as VXLAN and Device Drivers are no longer dependent, but there is no harm for those fixes to get into net-next. Optionally, once net is merged into net-next we can Revert "net/mlx5e: make VXLAN support conditional" as the CONFIG_MLX5_CORE_EN_VXLAN will no longer be required. Applied on top: 288928658583 ('mlxsw: spectrum: Add missing rollback in flood configuration') ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09net/mlx5e: make VXLAN support conditionalArnd Bergmann
VXLAN can be disabled at compile-time or it can be a loadable module while mlx5 is built-in, which leads to a link error: drivers/net/built-in.o: In function `mlx5e_create_netdev': ntb_netdev.c:(.text+0x106de4): undefined reference to `vxlan_get_rx_port' This avoids the link error and makes the vxlan code optional, like the other ethernet drivers do as well. Link: https://patchwork.ozlabs.org/patch/589296/ Fixes: b3f63c3d5e2c ("net/mlx5e: Add netdev support for VXLAN tunneling") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09Revert "net/mlx5: Kconfig: Fix MLX5_EN/VXLAN build issue"Arnd Bergmann
This reverts commit 69976fb1045850a742deb9790ea49cbc6f497531. We cannot select VXLAN when IPv4 support is disabled, that just gives us additional build errors, including: warning: (MLX5_CORE_EN) selects VXLAN which has unmet direct dependencies (NETDEVICES && NET_CORE && INET) In file included from ../drivers/net/vxlan.c:36:0: include/net/udp_tunnel.h: In function 'udp_tunnel_handle_offloads': include/net/udp_tunnel.h:112:9: error: implicit declaration of function 'iptunnel_handle_offloads' [-Werror=implicit-function-declaration] return iptunnel_handle_offloads(skb, type); ^~~~~~~~~~~~~~~~~~~~~~~~ I'm sending a proper fix for the original bug in a separate patch. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09Merge branch 'sh_eth-sw-reset'David S. Miller
Sergei Shtylyov says: ==================== sh_eth: couple of software reset bit cleanups Here's a set of 2 patches against DaveM's 'net-next.git' repo. We can save on the repetitive chip reset code... [1/2] sh_eth: call sh_eth_tsu_write() from sh_eth_chip_reset_giga() [2/2] sh_eth: reuse sh_eth_chip_reset() ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09sh_eth: reuse sh_eth_chip_reset()Sergei Shtylyov
All the chip_reset() methods repeat the code writing to the ARSTR register and delaying for 1 ms, so that we can reuse sh_eth_chip_reset() twice. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09sh_eth: call sh_eth_tsu_write() from sh_eth_chip_reset_giga()Sergei Shtylyov
sh_eth_chip_reset_giga() doesn't really need to use direct iowrite32() when writing to the ARSTR register, it can use sh_eth_tsu_write() as all other chip_reset() methods. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09pxa168_eth: mdiobus_scan() doesn't return NULL anymoreSergei Shtylyov
Now that mdiobus_scan() doesn't return NULL on failure anymore, this driver no longer needs to check for it... Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09Merge branch 'for-upstream' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg says: ==================== pull request: bluetooth-next 2016-05-07 Here are a few more Bluetooth patches for the 4.7 kernel: - NULL pointer fix in hci_intel driver - New Intel Bluetooth controller id in btusb driver - Added device tree binding documentation for Marvel's bt-sd8xxx - Platform specific wakeup interrupt support for btmrvl driver Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09macsec: key identifier is 128 bits, not 64Sabrina Dubroca
The MACsec standard mentions a key identifier for each key, but doesn't specify anything about it, so I arbitrarily chose 64 bits. IEEE 802.1X-2010 specifies MKA (MACsec Key Agreement), and defines the key identifier to be 128 bits (96 bits "member identifier" + 32 bits "key number"). Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09tcp: refactor struct tcp_skb_cbLawrence Brakmo
Refactor tcp_skb_cb to create two overlaping areas to store state for incoming or outgoing skbs based on comments by Neal Cardwell to tcp_nv patch: AFAICT this patch would not require an increase in the size of sk_buff cb[] if it were to take advantage of the fact that the tcp_skb_cb header.h4 and header.h6 fields are only used in the packet reception code path, and this in_flight field is only used on the transmit side. Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09ARC: Add eznps platform to Kconfig and MakefileNoam Camus
This commit should be left last since only now eznps platform is in state which one can actually use. Signed-off-by: Noam Camus <noamc@ezchip.com>
2016-05-09ARC: [plat-eznps] Use dedicated COMMAND_LINE_SIZENoam Camus
The default 256 bytes sometimes is just not enough. We usually provide earlycon=... and console=... and ip=... All this and more may need more room. Signed-off-by: Noam Camus <noamc@ezchip.com> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2016-05-09ARC: [plat-eznps] Use dedicated cpu_relax()Tal Zilcer
Since the CTOP is SMT hardware multi-threaded, we need to hint the HW that now will be a very good time to do a hardware thread context switching. This is done by issuing the schd.rw instruction (binary coded here so as to not require specific revision of GCC to build the kernel). sched.rw means that Thread becomes eligible for execution by the threads scheduler after all pending read/write transactions were completed. Implementing cpu_relax_lowlatency() with barrier() Since with current semantics of cpu_relax() it may take a while till yielded CPU will get back. Signed-off-by: Noam Camus <noamc@ezchip.com> Cc: Peter Zijlstra <peterz@infradead.org> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2016-05-09ARC: [plat-eznps] Use dedicated identity auxiliary register.Noam Camus
With generic "identity" num of CPUs is limited to 256 (8 bit). We use our alternative AUX register GLOBAL_ID (12 bit). Now we can support up to 4096 CPUs. Signed-off-by: Noam Camus <noamc@ezchip.com>
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