Peter Hurley [Mon, 13 Jul 2015 02:49:11 +0000 (22:49 -0400)]
tty: Replace inline #ifdef TTY_DEBUG_WAIT_UNTIL_SENT
Add tty_debug_wait_until_sent() macro which uses tty_debug() to print
the debug message; remove inlined #ifdef.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 02:49:10 +0000 (22:49 -0400)]
tty: Use tty_debug() for tty_ldisc_debug()
Replace tty_ldisc_debug() macro definition; substitute with equivalent
tty_debug() invocation.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 02:49:09 +0000 (22:49 -0400)]
tty: Replace #ifdef TTY_DEBUG_HANGUP with tty_debug_hangup()
Add tty_debug_hangup() macro which uses tty_debug to print the
debug message; remove inlined #ifdefs.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 02:49:08 +0000 (22:49 -0400)]
tty: core: Add tty_debug() for printk(KERN_DEBUG) messages
Introduce tty_debug() macro to output uniform debug information for
tty core debug messages (function name and tty name).
Note: printk(KERN_DEBUG) is retained here over pr_debug() since
messages can be enabled in non-DEBUG builds.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 02:49:07 +0000 (22:49 -0400)]
tty: core: Improve debug message content
Output the function name, tty name, and invariant failure (if applicable).
Add the tty count to the tty_open() message. Fix the disassociate_ctty()
message, which printed the NULL pointer and the wrong message.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 22 Jul 2015 02:02:18 +0000 (22:02 -0400)]
drivers/tty: make serial/sunhv.c driver explicitly non-modular
The Kconfig for this driver is currently:
config SERIAL_SUNHV
bool "Sun4v Hypervisor Console support"
...meaning that it currently is not being built as a module by
anyone. Lets remove the modular and unused code here, so that
when reading the driver there is no doubt it is builtin-only.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We don't swap module.h for init.h since this file has init.h already.
We leave some tags like MODULE_LICENSE for documentation purposes, and
for the "git blame" value. Also note that MODULE_DEVICE_TABLE is a
no-op for non-modular code, so we remove that too.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: sparclinux@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 22 Jul 2015 02:02:17 +0000 (22:02 -0400)]
drivers/tty: make serial/suncore.c driver explicitly non-modular
The Kconfig for this driver is currently:
config SERIAL_SUNCORE
bool
...meaning that it currently is not being built as a module by
anyone. Lets remove the modular and unused code here, so that
when reading the driver there is no doubt it is builtin-only.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We don't swap module.h for init.h since this file has init.h already.
We leave some tags like MODULE_LICENSE for documentation purposes, and
for the "git blame" value.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: sparclinux@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 22 Jul 2015 02:02:16 +0000 (22:02 -0400)]
drivers/tty: make serial/lantic.c driver explicitly non-modular
The Kconfig for this option is currently:
config SERIAL_LANTIQ
bool "Lantiq serial driver"
...meaning that it currently is not being built as a module by anyone.
Lets remove the couple traces of modularity, so that when reading the
driver there is no doubt it is builtin-only.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We delete the MODULE_DESCRIPTION and LICENSE tags since they are
not adding any new information above and beyond what is at the top
of the file. Also note that MODULE_DEVICE_TABLE is a no-op for
non-modular code, so we remove that as well.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-serial@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 22 Jul 2015 02:02:15 +0000 (22:02 -0400)]
drivers/tty: make serial/sn_console.c driver explicitly non-modular
The Kconfig for this option is currently:
config SERIAL_SGI_L1_CONSOLE
bool "SGI Altix L1 serial console support"
...meaning that it currently is not being built as a module by anyone.
Lets remove the orphaned module code, so that when reading the
driver there is no doubt it is builtin-only. We could consider
making it tristate, but the above bool has been there since before
the start of git history, which isn't all that surprising, since
consoles are typically critical to have at early boot. So adding
tristate is really of no value here.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-serial@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Javier Martinez Canillas [Mon, 13 Jul 2015 11:18:51 +0000 (13:18 +0200)]
serial: samsung: Remove redundant DEBUG_LL check
Commit
84f57d9e3685 ("tty: serial/samsung: fix modular build") fixed
build issues when the driver was built as a module. One of those was
that printascii is only accessible when the driver is built-in.
But there is no need to check for defined(CONFIG_DEBUG_LL) since the
SERIAL_SAMSUNG_DEBUG Kconfig symbol already depends on DEBUG_LL.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 00:50:50 +0000 (20:50 -0400)]
tty: buffers: Move hidden buffer index advance into outer loop
The advance of the 'read' buffer index belongs in the outer
flip buffer consume loop, with the other buffer index arithmetic.
No functional change.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 00:50:49 +0000 (20:50 -0400)]
tty: Replace smp_rmb/smp_wmb with smp_load_acquire/smp_store_release
Clarify flip buffer producer/consumer operation; the use of
smp_load_acquire() and smp_store_release() more clearly indicates
which memory access requires a barrier.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Stein [Thu, 9 Jul 2015 08:34:34 +0000 (10:34 +0200)]
serial/uuc_uart: Support higher bitrates than 115200 Bit/s
The maximum bitrate supported depends on the clock rate used in BRG.
This is stored in port.uartclk during probe. Respecting the 16x
oversampling higher bitrates can be supported.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Krzysztof Kozlowski [Fri, 10 Jul 2015 06:36:20 +0000 (15:36 +0900)]
tty: serial: Drop owner assignment from i2c_driver
i2c_driver does not need to set an owner because i2c_register_driver()
will set it.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Krzysztof Kozlowski [Fri, 10 Jul 2015 06:36:19 +0000 (15:36 +0900)]
tty: serial: Drop owner assignment from platform_driver
platform_driver does not need to set an owner because
platform_driver_register() will set it.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Thu, 2 Jul 2015 13:18:13 +0000 (15:18 +0200)]
tty/serial: at91: use 32bit writes into TX FIFO when DMA is enabled
For now this improvement is only used with TX DMA transfers. The data
width must be set properly when configuring the DMA controller. Also
the FIFO configuration must be set to match the DMA transfer data
width:
TXRDYM (Transmitter Ready Mode) and RXRDYM (Receiver Ready Mode) must
be set into the FIFO Mode Register. These values are used by the
USART to trigger the DMA controller. In single data mode they are not
used and should be reset to 0.
So the TXRDYM bits are changed to FOUR_DATA; then USART triggers the
DMA controller when at least 4 data can be written into the TX FIFO
througth the THR. On the other hand the RXRDYM bits are left unchanged
to ONE_DATA.
Atmel eXtended DMA controller allows us to set a different data width
for each part of a scatter-gather transfer. So when calling
dmaengine_slave_config() to configure the TX path, we just need to set
dst_addr_width to the maximum data width. Then DMA writes into THR are
split into up to two parts. The first part carries the first data to
be sent and has a length equal to the greatest multiple of 4 (bytes)
lower than or equal to the total length of the TX DMA transfer. The
second part carries the trailing data (up to 3 bytes). The first part
is written by the DMA into THR using 32 bit accesses, whereas 8bit
accesses are used for the second part.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Thu, 2 Jul 2015 13:18:12 +0000 (15:18 +0200)]
tty/serial: at91: add support to FIFOs
Depending on the hardware, TX and RX FIFOs may be available. The RX
FIFO can avoid receive overruns, especially when DMA transfers are
not used to read data from the Receive Holding Register. For heavy
system load, The CPU is likely not be able to fetch data fast enough
from the RHR.
In addition, the RX FIFO can supersede the DMA/PDC to control the RTS
line when the Hardware Handshaking mode is enabled. Two thresholds
are to be set for that purpose:
- When the number of data in the RX FIFO crosses and becomes lower
than or equal to the low threshold, the RTS line is set to low
level: the remote peer is requested to send data.
- When the number of data in the RX FIFO crosses and becomes greater
than or equal to the high threshold, the RTS line is set to high
level: the remote peer should stop sending new data.
- low threshold <= high threshold
Once these two thresholds are set properly, this new feature is
enabled by setting the FIFO RTS Control bit of the FIFO Mode Register.
FIFOs also introduce a new multiple data mode: the USART works either
in multiple data mode or in single data (legacy) mode.
If MODE9 bit is set into the Mode Register or if USMODE is set to
either LIN_MASTER, LIN_SLAVE or LON_MODE, FIFOs operate in single
data mode. Otherwise, they operate in multiple data mode.
In this new multiple data mode, accesses to the Receive Holding
Register or Transmit Holding Register slightly change.
Since this driver implements neither the 9bit data feature (MODE9 bit
set into the Mode Register) nor LIN modes, the USART works in
multiple data mode whenever FIFOs are available and enabled. We also
assume that data are 8bit wide.
In single data mode, 32bit access CAN be used to read a single data
from RHR or write a single data into THR.
However in multiple data mode, a 32bit access to RHR now allows us to
read four consecutive data from RX FIFO. Also a 32bit access to THR
now allows to write four consecutive data into TX FIFO. So we MUST
use 8bit access whenever only one data have to be read/written at a
time.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Thu, 2 Jul 2015 13:18:11 +0000 (15:18 +0200)]
tty/serial: at91: remove bunch of macros to access UART registers
This patch replaces the UART_PUT_*, resp. UART_GET_*, macros by
atmel_uart_writel(), resp. atmel_uart_readl(), inline function calls.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Thu, 2 Jul 2015 13:18:10 +0000 (15:18 +0200)]
tty/serial: at91: fix some macro definitions to fit coding style
This patch updates macro definitions in atmel_serial.h to fit the
80 column rule.
Please note that some deprecated comments such as "[AT91SAM9261 only]"
are removed as the corresponding bits also exist in some later chips.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Thu, 2 Jul 2015 13:18:09 +0000 (15:18 +0200)]
ARM: at91/dt: add a new DT property to support FIFOs on Atmel USARTs
This patch adds a new DT property, "atmel,fifo-size", to enable and set
the maximum number of data the RX and TX FIFOs can store on FIFO capable
USARTs.
Please be aware that the VERSION register can not be used to guess the
size of FIFOs. Indeed, for a given hardware version, the USARTs can be
integrated on Atmel SoCs with different FIFO sizes. Also the
"atmel,fifo-size" property is optional as older USARTs don't embed FIFO at
all.
Besides, the FIFO size can not be read or guessed from other registers:
When designing the FIFO feature, no dedicated registers were added to
store this size. Unsed spaces in the I/O register range are limited and
better reserved for future usages. Instead, the FIFO size of each
peripheral is documented in the programmer datasheet.
Finally, on a given SoC, there can be several instances of USART with
different FIFO sizes. This explain why we'd rather use a dedicated DT
property than use the "compatible" property.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrick Donnelly [Sun, 12 Jul 2015 22:51:52 +0000 (18:51 -0400)]
tty: add missing rcu_read_lock for task_pgrp
task_pgrp requires an rcu or tasklist lock to be obtained if the returned pid
is to be dereferenced, which kill_pgrp does. Obtain an RCU lock for the
duration of use.
Signed-off-by: Patrick Donnelly <batrick@batbytes.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joerg Roedel [Thu, 16 Jul 2015 08:29:13 +0000 (10:29 +0200)]
serial: 8250: Do XR17V35X specific wakeup in serial8250_do_startup
The XR17V35X UART needs the ECB bit set in its XR_EFR
register to enable access to IER [7:5], ISR [5:4], FCR[5:4],
MCR[7:5], and MSR [7:0].
Also reset the IER register to mask interrupts after access
to all bits of this register has been enabled.
This makes my 8-port XR17V35X working with the in-kernel
serial driver.
Cc: Joe Schultz <jschultz@xes-inc.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Mon, 13 Jul 2015 01:11:31 +0000 (21:11 -0400)]
serial: 8250: Defer interrupt enable until fifos enabled
An already-active sender can swamp the interrupt handler with
"too much work" if the rx interrupts are enabled when the fifo is
disabled and operating in single-byte mode.
Defer rx and line status interrupt enable until after the fifos
are enabled in set_termios(), but at least initialize the shadow
IER value with the interrupts which will be enabled.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Slaby [Tue, 23 Jun 2015 17:09:59 +0000 (19:09 +0200)]
tty: linux/gsmmux.h needs linux/types.h
We use __u8 in linux/gsmmux.h, so include linux/types.h to have that
defined.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vineet Gupta [Thu, 9 Jul 2015 06:20:38 +0000 (11:50 +0530)]
tty/early: make serial8250_early_{in,out} static again
Commit
ed71871bed719 ("tty/8250_early: Turn serial_in/serial_out into
weak symbols") made these routines weak to allow platform specific
Big endian override
However recent updates to core, specifically
ebc5e20082 ("serial:
of_serial: Support big-endian register accesses") and
6e63be3fee14
("serial: earlycon: Add support for big-endian MMIO accesses") means
that round about way to overide the early serial accessors is no longer
needed.
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Sat, 27 Jun 2015 13:19:00 +0000 (09:19 -0400)]
serial: 8250: Split base port operations from universal driver
Refactor base port operations into new file; 8250_port.c.
Legacy irq handling, RSA port support, port storage for universal
driver, driver definition, module parameters and linkage remain in
8250_core.c
The source file split and resulting modules is diagrammed below:
8250_core.c ====> 8250_core.c __
\ \
\ +-- 8250.ko (alias 8250_core)
\ 8250_pnp.c __/ (universal driver)
\
=> 8250_port.c __
\
+-- 8250_base.ko
8250_dma.c __/ (port operations)
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Jander [Thu, 2 Jul 2015 14:29:49 +0000 (16:29 +0200)]
tty: serial: imx.c: Reset UART before activating interrupts
If the UART has been in use before this driver was loaded, IRQs might be
active and get fired as soon as we set the handler, which will crash
in the spin_lock_irqsave(&sport->port.lock, flags) because port.lock is
not initialized until the port is added at the end of probe.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Manfred Schlaegl [Sat, 20 Jun 2015 17:25:52 +0000 (19:25 +0200)]
serial: imx: reduce irq-latency after rx overflow
To prevent problems with interrupt latency, and due to the fact, that
the error will be counted anyway (icount.overrun), the dev_err is simply
removed.
Background:
If an rx-fifo overflow occurs a dev_err message was called in interrupt
context. Since dev_err messages are written to console in a synchronous way
(unbuffered), and console may be a serial terminal, this leads to a
highly increased interrupt-latency (several milliseconds).
As a result of the high latency more rx-fifo overflows will happen, and
therefore a feedback loop of errors is created.
Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Acked-By: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Manfred Schlaegl [Sat, 20 Jun 2015 17:25:35 +0000 (19:25 +0200)]
serial: imx: count tty buffer overruns
As can be seen in function uart_insert_char (serial_core) the element
buf_overrun of struct uart_icount is used to count overruns of
tty-buffer.
Added support for counting of overruns in imx driver analogue to
serial_core.
Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Wed, 17 Jun 2015 20:35:43 +0000 (17:35 -0300)]
serial: imx: Disable irqs before requesting them
Disable interrupts before requesting them in order to fix a kernel oops
after lauching a kernel via kexec.
Tested on a imx6sl-evk board.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Mon, 15 Jun 2015 14:36:07 +0000 (16:36 +0200)]
serial/uartlite: Let it build on any arch with IOMEM
Being a soft core, it can be located not only on PPC or Microblaze
platforms.
Since the driver already does endianness detection we only need to
change the Kconfig to use it in other arches.
This is also done in other softcores as xilinx-spi.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maxime Coquelin [Tue, 16 Jun 2015 09:12:19 +0000 (11:12 +0200)]
serial: stm32-usart: Fix SysRq support
SysRq support activation depends on CONFIG_SERIAL_STM32_USART_CONSOLE, but
this config flag does not exists.
This patch fix this by depending on the valid config flag, which is
SERIAL_STM32_CONSOLE.
Reported-by: Andreas Ruprecht <andreas.ruprecht@fau.de>
Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qipan Li [Tue, 14 Jul 2015 00:52:23 +0000 (00:52 +0000)]
serial: sirf: let uart's receive start in right place
While UART work in DMA mode, function start_rx will request descriptor
from DMA engine, if there is no left descriptor UART, driver will give
err logs "DMA slave single fail".
currently start_rx is called in set_termios function, so everytime, port
setting will call start_rx once.
Now put start_rx in startup, it will be called once while open the port.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qipan Li [Tue, 14 Jul 2015 00:52:22 +0000 (00:52 +0000)]
serial: sirf: workaround rx process to avoid possible data loss
when UART works in DMA mode and left bytes in rx fifo less than
a dma transfer unit, DMA engine can't transfer the bytes out
to rx DMA buffer. so it need a way to fetch them out and
flush them into tty buffer in time.
in the above case, we want UART switch from DMA mode to PIO mode and
fetch && flush bytes into tty layer buffer until rxfifo become empty,
after that done let UART switch from PIO mode back to DMA mode.
(record as method1)
method1 result in the next receive result wrong. for example in PIO part
of method1, we fetched && pushed X1...X3 bytes, when UART rxfifo newly
received Y1...Y4 bytes, UART trigger a DMA unit transfer, the DMA unit's
content is X1...X3Y1 and rxfifo fifo status is empty, so X1X2X3 pushed
twice by PIO way and DMA way also the bytes Y2Y3Y4 missed. add rxfifo
reset operation before UART switch back to DMA mode would resolve the
issue. ([method1 + do fifo reset] record as method2)
before the commit, UART driver use method2. but methd2 have a risk of
data loss, as if UART's shift register receive a complete byte and
transfer it into rxfifo before rxfifo reset operation the byte will
loss.
UART and USP have the similar bits CLEAR_RX_ADDR_EN(uart)/FRADDR_CLR_EN(usp),
When found UART controller changing I/O to DMA mode, UART controller
clears the two low bits of read point (rx_fifo_addr[1:0]).
when enable the bit + method1(record as method3), in above example
the DMA unit's content is X1...X3Y1 and there are Y2Y3Y4 in rxfifo by
experiment, we just push bytes in rx DMA buffer.
BTW, the workaround works only for UART receive DMA channel use SINGLE
DMA mode.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Axel Lin [Sun, 28 Jun 2015 01:46:43 +0000 (09:46 +0800)]
serial: etraxfs-uart: Convert to uart_console_device instead of open-coded
The implementation of cris_console_device() is exactly the same as
uart_console_device(), so let's switch to use uart_console_device().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Niklas Cassel <nks@flawful.org>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Sat, 27 Jun 2015 13:28:55 +0000 (09:28 -0400)]
serial: 8250_omap: Remove auto-IXON flow control
OMAP h/w-assisted IXON flow control is borked. The transmitter becomes
stuck if XON is never received; clearing the fifos or resetting the
rx flow control bits has no effect.
Remove auto-IXANY as well, since without auto-IXON, it has no purpose.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:08 +0000 (13:32 +0530)]
serial: 8250_omap: workaround module disable errata on dra7x SoCs
Due to Advisory 21 as documented in AM437x errata document,
UART module cannot be disabled once DMA is used. The only
workaround is to softreset the module before disabling it.
DRA7x UARTs are compatible to AM437x UARTs in terms of
this errata and prescribed workaround.
Enable usage of workaround for this errata on DRA7x SoCs.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:07 +0000 (13:32 +0530)]
serial: 8250_omap: workaround errata around idling UART after using DMA
AM335x, AM437x and DRA7x SoCs have an errata[1] due to which UART
cannot be idled after it has been used with DMA.
OMAP3 has a similar sounding errata which has been worked around
in
a2fc36613ac1af2e9 ("ARM: OMAP3: Use manual idle for UARTs
because of DMA errata"). But the workaround used there does not
apply to AM335x, AM437x SoCs.
After using DMA, the UART module on these SoCs must be soft reset
to go to idle.
This patch implements that errata workaround. It is expected that
UART will be used with DMA so no explicit check for DMA usage
has been added for errata applicability.
MDR1 register needs to be restored right after soft-reset because
"UART mode" must be set in that register for module wake-up on AM335x
to work. As a result, SCR register is now used to determine if
context was lost during sleep.
[1] See Advisory 21 in AM437x errata SPRZ408B, updated April 2015.
http://www.ti.com/lit/er/sprz408b/sprz408b.pdf
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:06 +0000 (13:32 +0530)]
serial: 8250_omap: introduce "ti,am3352-uart" compatible property
Use of of_machine_is_compatible() for handling AM335x specific
"DMA kick" quirk in 8250_omap driver makes it ugly to extend the
quirk for other platforms. Instead use a new compatible.
The new compatible will also make it easier to take care of
other quirks on AM335x and like SoCs.
In order to not break backward DTB compatibility for users of
8250_omap driver on AM335x based boards, existing use of
of_machine_is_compatible() has not been removed.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:05 +0000 (13:32 +0530)]
serial: 8250_omap: refactor mdr1 update
The silicon errata[1] workaround implemented in a follow-on
patch, "serial: 8250_omap: workaround errata on disabling
UART after using DMA", requires MDR1 register programming.
Extract MDR1 register update into helper function,
omap8250_update_mdr1() to help with that.
[1] Advisory 21 in http://www.ti.com/lit/er/sprz408b/sprz408b.pdf
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:04 +0000 (13:32 +0530)]
Documentation: DT: omap_serial: document missing compatible
The compatible "ti,am4372-uart" is used in arch/arm/boot/dts/am4372.dtsi
but not documented. Add necessary documentation.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sekhar Nori [Tue, 14 Jul 2015 08:02:03 +0000 (13:32 +0530)]
serial: 8250_omap: fix kernel crash in suspend-to-ram
omap_device infrastructure has a suspend_noirq hook which
runtime suspends all devices late in the suspend cycle (see
_od_suspend_noirq() in arch/arm/mach-omap2/omap_device.c)
This leads to a NULL pointer exception in 8250_omap driver
since by the time omap8250_runtime_suspend() is called, 8250_dma
driver has already set rxchan to NULL via serial8250_release_dma().
Make an explicit check to see if rxchan is NULL in
runtime_{suspend|resume} hooks to fix this.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Tue, 16 Jun 2015 08:59:40 +0000 (10:59 +0200)]
serial/8250_fintek: Support for any io address.
Fintek chip can be configured for io addresses different than the standard.
Query the chip for the configured addresses and try to match it with the
pnp address.
Reported-by: Peter Hong <peter_hong@fintek.com.tw>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Tue, 16 Jun 2015 08:59:39 +0000 (10:59 +0200)]
serial/8250_fintek: Support keys different than default
Chip can be configured to use entry key different than 0x77. Try all the
valid keys until one gives out the right chip id.
Reported-by: Peter Hong <peter_hong@fintek.com.tw>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Tue, 16 Jun 2015 08:59:38 +0000 (10:59 +0200)]
serial/8250_fintek: Support for chip_ip 0x0501
There are some chips with the same interface but different chip ip.
Reported-by: Peter Hong <peter_hong@fintek.com.tw>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Tue, 16 Jun 2015 08:59:37 +0000 (10:59 +0200)]
serial/8250_fintek: Support for multiple base_ports
Fintek chip can be connected at address 0x4e and also 0x2e.
Add some logic to find out the address of the chip.
Reported-by: Peter Hong <peter_hong@fintek.com.tw>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Tue, 16 Jun 2015 08:59:36 +0000 (10:59 +0200)]
serial/8250_fintek: Use private data structure
Save the port index and the line id in a private structure.
Reported-by: Peter Hong <peter_hong@fintek.com.tw>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vaishali Thakkar [Sat, 6 Jun 2015 00:35:24 +0000 (06:05 +0530)]
tty: Convert use of __constant_htons to htons
In little endian cases, macro htons unfolds to __swab16 which
provides special case for constants. In big endian cases,
__constant_htons and htons expand directly to the same expression.
So, replace __constant_htons with htons with the goal of getting
rid of the definition of __constant_htons completely.
The semantic patch that performs this transformation is as follows:
@@expression x;@@
- __constant_htons(x)
+ htons(x)
Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds [Sun, 19 Jul 2015 21:45:02 +0000 (14:45 -0700)]
Linux 4.2-rc3
Linus Torvalds [Sun, 19 Jul 2015 21:18:00 +0000 (14:18 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Two fairly simple fixes: one is a change that causes us to have a very
low queue depth leading to performance issues and the other is a null
deref occasionally in tapes thanks to use after put"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: fix host max depth checking for the 'queue_depth' sysfs interface
st: null pointer dereference panic caused by use after kref_put by st_open
Linus Torvalds [Sun, 19 Jul 2015 21:12:22 +0000 (14:12 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
"Another round of MIPS fixes for 4.2.
Things are looking quite decent at this stage but the recent work on
the FPU support took its toll:
- fix an incorrect overly restrictive ifdef
- select O32 64-bit FP support for O32 binary compatibility
- remove workarounds for Sibyte SB1250 Pass1 parts. There are rare
fixing the workarounds is not worth the effort.
- patch up an outdated and now incorrect comment"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: fpu.h: Allow 64-bit FPU on a 64-bit MIPS R6 CPU
MIPS: SB1: Remove support for Pass 1 parts.
MIPS: Require O32 FP64 support for MIPS64 with O32 compat
MIPS: asm-offset.c: Patch up various comments refering to the old filename.
Linus Torvalds [Sun, 19 Jul 2015 20:46:24 +0000 (13:46 -0700)]
Merge branch 'parisc-4.2-2' of git://git./linux/kernel/git/deller/parisc-linux
Pull parisc fix from Helge Deller:
"A memory leak fix from Christophe Jaillet which was introduced with
kernel 4.0 and which leads to kernel crashes on parisc after 1-3 days"
* 'parisc-4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: mm: Fix a memory leak related to pmd not attached to the pgd
Linus Torvalds [Sun, 19 Jul 2015 20:37:44 +0000 (13:37 -0700)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"By far most of the fixes here are updates to DTS files to deal with
some mostly minor bugs.
There's also a fix to deal with non-PM kernel configs on i.MX, a
regression fix for ethernet on PXA platforms and a dependency fix for
OMAP"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: keystone: dts: rename pcie nodes to help override status
ARM: keystone: dts: fix dt bindings for PCIe
ARM: pxa: fix dm9000 platform data regression
ARM: dts: Correct audio input route & set mic bias for am335x-pepper
ARM: OMAP2+: Add HAVE_ARM_SCU for AM43XX
MAINTAINERS: digicolor: add dts files
ARM: ux500: fix MMC/SD card regression
ARM: ux500: define serial port aliases
ARM: dts: OMAP5: Add #iommu-cells property to IOMMUs
ARM: dts: OMAP4: Add #iommu-cells property to IOMMUs
ARM: dts: Fix frequency scaling on Gumstix Pepper
ARM: dts: configure regulators for Gumstix Pepper
ARM: dts: omap3: overo: Update LCD panel names
ARM: dts: cros-ec-keyboard: Add support for some Japanese keys
ARM: imx6: gpc: always enable PU domain if CONFIG_PM is not set
ARM: dts: imx53-qsb: fix TVE entry
ARM: dts: mx23: fix iio-hwmon support
ARM: dts: imx27: Adjust the GPT compatible string
ARM: socfpga: dts: Fix entries order
ARM: socfpga: dts: Fix adxl34x formating and compatible string
Markos Chandras [Thu, 16 Jul 2015 14:30:04 +0000 (15:30 +0100)]
MIPS: fpu.h: Allow 64-bit FPU on a 64-bit MIPS R6 CPU
Commit
6134d94923d0 ("MIPS: asm: fpu: Allow 64-bit FPU on MIPS32 R6")
added support for 64-bit FPU on a 32-bit MIPS R6 processor but it missed
the 64-bit CPU case leading to FPU failures when requesting FR=1 mode
(which is always the case for MIPS R6 userland) when running a 32-bit
kernel on a 64-bit CPU. We also fix the MIPS R2 case.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Fixes: 6134d94923d0 ("MIPS: asm: fpu: Allow 64-bit FPU on MIPS32 R6")
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: <stable@vger.kernel.org> # 4.0+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10734/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Christophe Jaillet [Mon, 13 Jul 2015 09:32:43 +0000 (11:32 +0200)]
parisc: mm: Fix a memory leak related to pmd not attached to the pgd
Commit
0e0da48dee8d ("parisc: mm: don't count preallocated pmds")
introduced a memory leak.
After this commit, the 'return' statement in pmd_free is executed in all
cases. Even for pmd that are not attached to the pgd. So 'free_pages'
can never be called anymore, leading to a memory leak.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v4.0+
Signed-off-by: Helge Deller <deller@gmx.de>
Olof Johansson [Sun, 19 Jul 2015 04:06:10 +0000 (21:06 -0700)]
Merge tag 'pxa-fixes-v4.2-rc2' of https://github.com/rjarzmik/linux into fixesD
Merge "pxa fixes for v4.2" from Robert Jarzmik:
ARM: pxa: fixes for v4.2-rc2
This single fix reenables ethernet cards for several pxa boards,
broken by regulator addition to dm9000 driver.
* tag 'pxa-fixes-v4.2-rc2' of https://github.com/rjarzmik/linux:
ARM: pxa: fix dm9000 platform data regression
Linus Torvalds [Sat, 18 Jul 2015 18:03:48 +0000 (11:03 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"A small set of ARM fixes for -rc3, most of them not far off
one-liners, with the exception of fixing the V7 cache invalidation for
incoming SMP processors which was causing problems for SoCFPGA
devices"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: fix __virt_to_idmap build error on !MMU
ARM: invalidate L1 before enabling coherency
ARM: 8404/1: dma-mapping: fix off-by-one error in bitmap size check
ARM: 8402/1: perf: Don't use of_node after putting it
ARM: 8400/1: use virt_to_idmap to get phys_reset address
Linus Torvalds [Sat, 18 Jul 2015 17:49:57 +0000 (10:49 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Two families of fixes:
- Fix an FPU context related boot crash on newer x86 hardware with
larger context sizes than what most people test. To fix this
without ugly kludges or extensive reverts we had to touch core task
allocator, to allow x86 to determine the task size dynamically, at
boot time.
I've tested it on a number of x86 platforms, and I cross-built it
to a handful of architectures:
(warns) (warns)
testing x86-64: -git: pass ( 0), -tip: pass ( 0)
testing x86-32: -git: pass ( 0), -tip: pass ( 0)
testing arm: -git: pass ( 1359), -tip: pass ( 1359)
testing cris: -git: pass ( 1031), -tip: pass ( 1031)
testing m32r: -git: pass ( 1135), -tip: pass ( 1135)
testing m68k: -git: pass ( 1471), -tip: pass ( 1471)
testing mips: -git: pass ( 1162), -tip: pass ( 1162)
testing mn10300: -git: pass ( 1058), -tip: pass ( 1058)
testing parisc: -git: pass ( 1846), -tip: pass ( 1846)
testing sparc: -git: pass ( 1185), -tip: pass ( 1185)
... so I hope the cross-arch impact 'none', as intended.
(by Dave Hansen)
- Fix various NMI handling related bugs unearthed by the big asm code
rewrite and generally make the NMI code more robust and more
maintainable while at it. These changes are a bit late in the
cycle, I hope they are still acceptable.
(by Andy Lutomirski)"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86
x86/fpu, sched: Dynamically allocate 'struct fpu'
x86/entry/64, x86/nmi/64: Add CONFIG_DEBUG_ENTRY NMI testing code
x86/nmi/64: Make the "NMI executing" variable more consistent
x86/nmi/64: Minor asm simplification
x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI detection
x86/nmi/64: Reorder nested NMI checks
x86/nmi/64: Improve nested NMI comments
x86/nmi/64: Switch stacks on userspace NMI entry
x86/nmi/64: Remove asm code that saves CR2
x86/nmi: Enable nested do_nmi() handling for 64-bit kernels
Linus Torvalds [Sat, 18 Jul 2015 17:49:11 +0000 (10:49 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fix from Ingo Molnar:
"Fix for a misplaced export that can cause build failures in certain
(rare) Kconfig situations"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick: Move the export of tick_broadcast_oneshot_control to the proper place
Linus Torvalds [Sat, 18 Jul 2015 17:47:44 +0000 (10:47 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"A oneliner rq throttling fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Test list head instead of list entry in throttle_cfs_rq()
Linus Torvalds [Sat, 18 Jul 2015 17:44:21 +0000 (10:44 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, plus a static key fix fixing /sys/devices/cpu/rdpmc"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Really allow to specify custom CC, AR or LD
perf auxtrace: Fix misplaced check for HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
perf hists browser: Take the --comm, --dsos, etc filters into account
perf symbols: Store if there is a filter in place
x86, perf: Fix static_key bug in load_mm_cr4()
tools: Copy lib/hweight.c from the kernel sources
perf tools: Fix the detached tarball wrt rbtree copy
perf thread_map: Fix the sizeof() calculation for map entries
tools lib: Improve clean target
perf stat: Fix shadow declaration of close
perf tools: Fix lockup using 32-bit compat vdso
Linus Torvalds [Sat, 18 Jul 2015 17:27:12 +0000 (10:27 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Ingo Molnar:
"Misc irq fixes:
- two driver fixes
- a Xen regression fix
- a nested irq thread crash fix"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gicv3-its: Fix mapping of LPIs to collections
genirq: Prevent resend to interrupts marked IRQ_NESTED_THREAD
genirq: Revert sparse irq locking around __cpu_up() and move it to x86 for now
gpio/davinci: Fix race in installing chained irq handler
Linus Torvalds [Sat, 18 Jul 2015 17:01:04 +0000 (10:01 -0700)]
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"25 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (25 commits)
lib/decompress: set the compressor name to NULL on error
mm/cma_debug: correct size input to bitmap function
mm/cma_debug: fix debugging alloc/free interface
mm/page_owner: set correct gfp_mask on page_owner
mm/page_owner: fix possible access violation
fsnotify: fix oops in fsnotify_clear_marks_by_group_flags()
/proc/$PID/cmdline: fixup empty ARGV case
dma-debug: skip debug_dma_assert_idle() when disabled
hexdump: fix for non-aligned buffers
checkpatch: fix long line messages about patch context
mm: clean up per architecture MM hook header files
MAINTAINERS: uclinux-h8-devel is moderated for non-subscribers
mailmap: update Sudeep Holla's email id
Update Viresh Kumar's email address
mm, meminit: suppress unused memory variable warning
configfs: fix kernel infoleak through user-controlled format string
include, lib: add __printf attributes to several function prototypes
s390/hugetlb: add hugepages_supported define
mm: hugetlb: allow hugepages_supported to be architecture specific
revert "s390/mm: make hugepages_supported a boot time decision"
...
Linus Torvalds [Sat, 18 Jul 2015 04:46:57 +0000 (21:46 -0700)]
Merge branch 'for-linus-4.2' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"These are all from Filipe, and cover a few problems we've had reported
on the list recently (along with ones he found on his own)"
* 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix file corruption after cloning inline extents
Btrfs: fix order by which delayed references are run
Btrfs: fix list transaction->pending_ordered corruption
Btrfs: fix memory leak in the extent_same ioctl
Btrfs: fix shrinking truncate when the no_holes feature is enabled
Linus Torvalds [Sat, 18 Jul 2015 04:24:31 +0000 (21:24 -0700)]
Merge tag 'rtc-v4.2-2' of git://git./linux/kernel/git/abelloni/linux
Pull rtc fixes from Alexandre Belloni:
"A few fixes for the RTC susbsystem for 4.2.
The mt6397 driver was introduce in 4.2 so it is worth fixing before
the final release. I though the compilation warning for armada38x was
fixed by akpm in commit
f98b733e93e0 ("rtc-armada38x.c: remove unused
local `flags'") but he actually missed some occurrences of the
variables. Since I received 4 patches for that, I think we can
include it now.
Summary:
- fix mt6397 wakealarm creation
- remove a compilation warning for armada38x that was forgotten"
* tag 'rtc-v4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
rtc: armada38x: Remove unused variable from armada38x_rtc_set_time()
rtc: mt6397: enable wakeup before registering rtc device
Linus Torvalds [Sat, 18 Jul 2015 03:53:57 +0000 (20:53 -0700)]
Merge tag 'dm-4.2-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- revert a request-based DM core change that caused IO latency to
increase and adversely impact both throughput and system load
- fix for a use after free bug in DM core's device cleanup
- a couple DM btree removal fixes (used by dm-thinp)
- a DM thinp fix for order-5 allocation failure
- a DM thinp fix to not degrade to read-only metadata mode when in
out-of-data-space mode for longer than the 'no_space_timeout'
- fix a long-standing oversight in both dm-thinp and dm-cache by now
exporting 'needs_check' in status if it was set in metadata
- fix an embarrassing dm-cache busy-loop that caused worker threads to
eat cpu even if no IO was actively being issued to the cache device
* tag 'dm-4.2-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache: avoid calls to prealloc_free_structs() if possible
dm cache: avoid preallocation if no work in writeback_some_dirty_blocks()
dm cache: do not wake_worker() in free_migration()
dm cache: display 'needs_check' in status if it is set
dm thin: display 'needs_check' in status if it is set
dm thin: stay in out-of-data-space mode once no_space_timeout expires
dm: fix use after free crash due to incorrect cleanup sequence
Revert "dm: only run the queue on completion if congested or no requests pending"
dm btree: silence lockdep lock inversion in dm_btree_del()
dm thin: allocate the cell_sort_array dynamically
dm btree remove: fix bug in redistribute3
Ingo Molnar [Fri, 17 Jul 2015 10:28:12 +0000 (12:28 +0200)]
x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86
Don't burden architectures without dynamic task_struct sizing
with the overhead of dynamic sizing.
Also optimize the x86 code a bit by caching task_struct_size.
Acked-and-Tested-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437128892-9831-3-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Dave Hansen [Fri, 17 Jul 2015 10:28:11 +0000 (12:28 +0200)]
x86/fpu, sched: Dynamically allocate 'struct fpu'
The FPU rewrite removed the dynamic allocations of 'struct fpu'.
But, this potentially wastes massive amounts of memory (2k per
task on systems that do not have AVX-512 for instance).
Instead of having a separate slab, this patch just appends the
space that we need to the 'task_struct' which we dynamically
allocate already. This saves from doing an extra slab
allocation at fork().
The only real downside here is that we have to stick everything
and the end of the task_struct. But, I think the
BUILD_BUG_ON()s I stuck in there should keep that from being too
fragile.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437128892-9831-2-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Aneesh Kumar K.V [Fri, 17 Jul 2015 23:24:26 +0000 (16:24 -0700)]
lib/decompress: set the compressor name to NULL on error
Without this we end up using the previous name of the compressor in the
loop in unpack_rootfs. For example we get errors like "compression
method gzip not configured" even when we have CONFIG_DECOMPRESS_GZIP
enabled.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joonsoo Kim [Fri, 17 Jul 2015 23:24:23 +0000 (16:24 -0700)]
mm/cma_debug: correct size input to bitmap function
In CMA, 1 bit in bitmap means 1 << order_per_bits pages so size of
bitmap is cma->count >> order_per_bits rather than just cma->count.
This patch fixes it.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Stefan Strogin <stefan.strogin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joonsoo Kim [Fri, 17 Jul 2015 23:24:20 +0000 (16:24 -0700)]
mm/cma_debug: fix debugging alloc/free interface
CMA has alloc/free interface for debugging. It is intended that
alloc/free occurs in specific CMA region, but, currently, alloc/free
interface is on root dir due to the bug so we can't select CMA region
where alloc/free happens.
This patch fixes this problem by making alloc/free interface per CMA
region.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Stefan Strogin <stefan.strogin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joonsoo Kim [Fri, 17 Jul 2015 23:24:18 +0000 (16:24 -0700)]
mm/page_owner: set correct gfp_mask on page_owner
Currently, we set wrong gfp_mask to page_owner info in case of isolated
freepage by compaction and split page. It causes incorrect mixed
pageblock report that we can get from '/proc/pagetypeinfo'. This metric
is really useful to measure fragmentation effect so should be accurate.
This patch fixes it by setting correct information.
Without this patch, after kernel build workload is finished, number of
mixed pageblock is 112 among roughly 210 movable pageblocks.
But, with this fix, output shows that mixed pageblock is just 57.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joonsoo Kim [Fri, 17 Jul 2015 23:24:15 +0000 (16:24 -0700)]
mm/page_owner: fix possible access violation
When I tested my new patches, I found that page pointer which is used
for setting page_owner information is changed. This is because page
pointer is used to set new migratetype in loop. After this work, page
pointer could be out of bound. If this wrong pointer is used for
page_owner, access violation happens. Below is error message that I
got.
BUG: unable to handle kernel paging request at
0000000000b00018
IP: [<
ffffffff81025f30>] save_stack_address+0x30/0x40
PGD
1af2d067 PUD
166e0067 PMD 0
Oops: 0002 [#1] SMP
...snip...
Call Trace:
print_context_stack+0xcf/0x100
dump_trace+0x15f/0x320
save_stack_trace+0x2f/0x50
__set_page_owner+0x46/0x70
__isolate_free_page+0x1f7/0x210
split_free_page+0x21/0xb0
isolate_freepages_block+0x1e2/0x410
compaction_alloc+0x22d/0x2d0
migrate_pages+0x289/0x8b0
compact_zone+0x409/0x880
compact_zone_order+0x6d/0x90
try_to_compact_pages+0x110/0x210
__alloc_pages_direct_compact+0x3d/0xe6
__alloc_pages_nodemask+0x6cd/0x9a0
alloc_pages_current+0x91/0x100
runtest_store+0x296/0xa50
simple_attr_write+0xbd/0xe0
__vfs_write+0x28/0xf0
vfs_write+0xa9/0x1b0
SyS_write+0x46/0xb0
system_call_fastpath+0x16/0x75
This patch fixes this error by moving up set_page_owner().
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jan Kara [Fri, 17 Jul 2015 23:24:12 +0000 (16:24 -0700)]
fsnotify: fix oops in fsnotify_clear_marks_by_group_flags()
fsnotify_clear_marks_by_group_flags() can race with
fsnotify_destroy_marks() so when fsnotify_destroy_mark_locked() drops
mark_mutex, a mark from the list iterated by
fsnotify_clear_marks_by_group_flags() can be freed and we dereference free
memory in the loop there.
Fix the problem by keeping mark_mutex held in
fsnotify_destroy_mark_locked(). The reason why we drop that mutex is that
we need to call a ->freeing_mark() callback which may acquire mark_mutex
again. To avoid this and similar lock inversion issues, we move the call
to ->freeing_mark() callback to the kthread destroying the mark.
Signed-off-by: Jan Kara <jack@suse.cz>
Reported-by: Ashish Sangwan <a.sangwan@samsung.com>
Suggested-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alexey Dobriyan [Fri, 17 Jul 2015 23:24:09 +0000 (16:24 -0700)]
/proc/$PID/cmdline: fixup empty ARGV case
/proc/*/cmdline code checks if it should look at ENVP area by checking
last byte of ARGV area:
rv = access_remote_vm(mm, arg_end - 1, &c, 1, 0);
if (rv <= 0)
goto out_free_page;
If ARGV is somehow made empty (by doing execve(..., NULL, ...) or
manually setting ->arg_start and ->arg_end to equal values), the decision
will be based on byte which doesn't even belong to ARGV/ENVP.
So, quickly check if ARGV area is empty and report 0 to match previous
behaviour.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Haggai Eran [Fri, 17 Jul 2015 23:24:06 +0000 (16:24 -0700)]
dma-debug: skip debug_dma_assert_idle() when disabled
If dma-debug is disabled due to a memory error, DMA unmaps do not affect
the dma_active_cacheline radix tree anymore, and debug_dma_assert_idle()
can print false warnings.
Disable debug_dma_assert_idle() when dma_debug_disabled() is true.
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Fixes: 0abdd7a81b7e ("dma-debug: introduce debug_dma_assert_idle()")
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Horacio Mijail Anton Quiles [Fri, 17 Jul 2015 23:24:04 +0000 (16:24 -0700)]
hexdump: fix for non-aligned buffers
A hexdump with a buf not aligned to the groupsize causes
non-naturally-aligned memory accesses. This was causing a kernel panic
on the processor BlackFin BF527, when such an unaligned buffer was fed
by the function ubifs_scanned_corruption in fs/ubifs/scan.c .
To fix this, change accesses to the contents of the buffer so they go
through get_unaligned(). This change should be harmless to unaligned-
access-capable architectures, and any performance hit should be anyway
dwarfed by the snprintf() processing time.
Signed-off-by: Horacio Mijail Antón Quiles <hmijail@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Joe Perches <joe@perches.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joe Perches [Fri, 17 Jul 2015 23:24:01 +0000 (16:24 -0700)]
checkpatch: fix long line messages about patch context
Changes in ("checkpatch: categorize some long line length checks")
now erroneously reports long line defects in patch context.
Fix it.
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Laurent Dufour [Fri, 17 Jul 2015 23:23:58 +0000 (16:23 -0700)]
mm: clean up per architecture MM hook header files
Commit
2ae416b142b6 ("mm: new mm hook framework") introduced an empty
header file (mm-arch-hooks.h) for every architecture, even those which
doesn't need to define mm hooks.
As suggested by Geert Uytterhoeven, this could be cleaned through the use
of a generic header file included via each per architecture
asm/include/Kbuild file.
The PowerPC architecture is not impacted here since this architecture has
to defined the arch_remap MM hook.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Geert Uytterhoeven [Fri, 17 Jul 2015 23:23:55 +0000 (16:23 -0700)]
MAINTAINERS: uclinux-h8-devel is moderated for non-subscribers
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sudeep Holla [Fri, 17 Jul 2015 23:23:53 +0000 (16:23 -0700)]
mailmap: update Sudeep Holla's email id
Since the get_maintainer script still reports my old email id based on
few old commits, update mailmap to report new/updated address. It also
helps to fix email address for 'git shortlog'
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Viresh Kumar [Fri, 17 Jul 2015 23:23:50 +0000 (16:23 -0700)]
Update Viresh Kumar's email address
Switch to my kernel.org alias instead of a badly named gmail address,
which I rarely use.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mel Gorman [Fri, 17 Jul 2015 23:23:48 +0000 (16:23 -0700)]
mm, meminit: suppress unused memory variable warning
The kbuild test robot reported the following
tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:
14a6f1989dae9445d4532941bdd6bbad84f4c8da
commit:
3b242c66ccbd60cf47ab0e8992119d9617548c23 x86: mm: enable deferred struct page initialisation on x86-64
date: 3 days ago
config: x86_64-randconfig-x006-201527 (attached as .config)
reproduce:
git checkout
3b242c66ccbd60cf47ab0e8992119d9617548c23
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
mm/page_alloc.c: In function 'early_page_uninitialised':
>> mm/page_alloc.c:247:6: warning: unused variable 'nid' [-Wunused-variable]
int nid = early_pfn_to_nid(pfn);
It's due to the NODE_DATA macro ignoring the nid parameter on !NUMA
configurations. This patch avoids the warning by not declaring nid.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nicolas Iooss [Fri, 17 Jul 2015 23:23:45 +0000 (16:23 -0700)]
configfs: fix kernel infoleak through user-controlled format string
Some modules call config_item_init_type_name() and config_group_init_type_name()
with parameter "name" directly controlled by userspace. These two
functions call config_item_set_name() with this name used as a format
string, which can be used to leak information such as content of the
stack to userspace.
For example, make_netconsole_target() in netconsole module calls
config_item_init_type_name() with the name of a newly-created directory.
This means that the following commands give some unexpected output, with
configfs mounted in /sys/kernel/config/ and on a system with a
configured eth0 ethernet interface:
# modprobe netconsole
# mkdir /sys/kernel/config/netconsole/target_%lx
# echo eth0 > /sys/kernel/config/netconsole/target_%lx/dev_name
# echo 1 > /sys/kernel/config/netconsole/target_%lx/enabled
# echo eth0 > /sys/kernel/config/netconsole/target_%lx/dev_name
# dmesg |tail -n1
[ 142.697668] netconsole: target (target_ffffffffc0ae8080) is
enabled, disable to update parameters
The directory name is correct but %lx has been interpreted in the
internal item name, displayed here in the error message used by
store_dev_name() in drivers/net/netconsole.c.
To fix this, update every caller of config_item_set_name to use "%s"
when operating on untrusted input.
This issue was found using -Wformat-security gcc flag, once a __printf
attribute has been added to config_item_set_name().
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nicolas Iooss [Fri, 17 Jul 2015 23:23:42 +0000 (16:23 -0700)]
include, lib: add __printf attributes to several function prototypes
Using __printf attributes helps to detect several format string issues
at compile time (even though -Wformat-security is currently disabled in
Makefile). For example it can detect when formatting a pointer as a
number, like the issue fixed in commit
a3fa71c40f18 ("wl18xx: show
rx_frames_per_rates as an array as it really is"), or when the arguments
do not match the format string, c.f. for example commit
5ce1aca81435
("reiserfs: fix __RASSERT format string").
To prevent similar bugs in the future, add a __printf attribute to every
function prototype which needs one in include/linux/ and lib/. These
functions were mostly found by using gcc's -Wsuggest-attribute=format
flag.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dominik Dingel [Fri, 17 Jul 2015 23:23:39 +0000 (16:23 -0700)]
s390/hugetlb: add hugepages_supported define
On s390 we only can enable hugepages if the underlying hardware/hypervisor
also does support this. Common code now would assume this to be
signaled by setting HPAGE_SHIFT to 0. But on s390, where we only
support one hugepage size, there is a link between HPAGE_SHIFT and
pageblock_order.
So instead of setting HPAGE_SHIFT to 0, we will implement the check for
the hardware capability.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dominik Dingel [Fri, 17 Jul 2015 23:23:37 +0000 (16:23 -0700)]
mm: hugetlb: allow hugepages_supported to be architecture specific
s390 has a constant hugepage size, by setting HPAGE_SHIFT we also change
e.g. the pageblock_order, which should be independent in respect to
hugepage support.
With this patch every architecture is free to define how to check
for hugepage support.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dominik Dingel [Fri, 17 Jul 2015 23:23:34 +0000 (16:23 -0700)]
revert "s390/mm: make hugepages_supported a boot time decision"
Heiko noticed that the current check for hugepage support on s390 is a
little bit too harsh as systems which do not support will crash.
The reason is that pageblock_order can now get negative when we set
HPAGE_SHIFT to 0. To avoid all this and to avoid opening another can of
worms with enabling HUGETLB_PAGE_SIZE_VARIABLE I think it would be best
to simply allow architectures to define their own hugepages_supported().
Revert
bea41197ead3 ("s390/mm: make hugepages_supported a boot time
decision") in preparation.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dominik Dingel [Fri, 17 Jul 2015 23:23:31 +0000 (16:23 -0700)]
revert "s390/mm: change HPAGE_SHIFT type to int"
Heiko noticed that the current check for hugepage support on s390 is a
little bit too harsh as systems which do not support will crash.
The reason is that pageblock_order can now get negative when we set
HPAGE_SHIFT to 0. To avoid all this and to avoid opening another can of
worms with enabling HUGETLB_PAGE_SIZE_VARIABLE I think it would be best
to simply allow architectures to define their own hugepages_supported().
This patch (of 4): revert commit
cf54e2fce51c ("s390/mm: change
HPAGE_SHIFT type to int") in preparation.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Fri, 17 Jul 2015 23:23:28 +0000 (16:23 -0700)]
openrisc: fix CONFIG_UID16 setting
openrisc-allnoconfig:
kernel/uid16.c: In function 'SYSC_setgroups16':
kernel/uid16.c:184:2: error: implicit declaration of function 'groups_alloc'
kernel/uid16.c:184:13: warning: assignment makes pointer from integer without a cast
openrisc shouldn't be setting CONFIG_UID16 when CONFIG_MULTIUSER=n.
Fixes: 2813893f8b197a1 ("kernel: conditionally support non-root users, groups and capabilities")
Reported-by: Fengguang Wu <fengguang.wu@gmail.com>
Cc: Iulia Manda <iulia.manda21@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michal Hocko [Fri, 17 Jul 2015 23:23:26 +0000 (16:23 -0700)]
MAINTAINERS: change mhocko's email address to
I am moving from mhocko@suse.cz to mhocko@kernel.org for kernel related
stuff.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Iago López Galeiras [Fri, 17 Jul 2015 23:23:23 +0000 (16:23 -0700)]
fs, proc: add help for CONFIG_PROC_CHILDREN
The purpose of the option was documented in
Documentation/filesystems/proc.txt but the help text was missing.
Add small help text that also points to the documentation.
Signed-off-by: Iago López Galeiras <iago@endocode.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Fri, 17 Jul 2015 23:23:20 +0000 (16:23 -0700)]
MAINTAINERS: switch to suse.com many-in-one (fwd)
Since suse.{de,cz} is deprecated to use (but will still work for some
time), switch to suse.com which is now to be used instead.
Signed-off-by: Jiri Slaby <jslaby@suse.com>
Acked-by: Alexander Graf <agraf@suse.de>
Acked-by: David Sterba <dsterba@suse.com>
Acked-by: Hannes Reinecke <hare@suse.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Jean Delvare <jdelvare@suse.com>
Acked-by: Jiri Kosina <jkosina@suse.com>
Acked-by: Michal Marek <mmarek@suse.com>
Acked-by: NeilBrown <neilb@suse.com>
Acked-by: Oliver Neukum <oneukum@suse.de>
Acked-by: Takashi Iwai <tiwai@suse.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Acked-by: Tomas Cech <sleep_walker@suse.com>
Acked-by: Vojtech Pavlik <vojtech@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fabio Estevam [Sat, 4 Jul 2015 18:27:34 +0000 (15:27 -0300)]
rtc: armada38x: Remove unused variable from armada38x_rtc_set_time()
Remove the 'flags' variable in order to fix the following warning:
drivers/rtc/rtc-armada38x.c:91:22: warning: unused variable 'flags' [-Wunused-variable]
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Wei-Ning Huang [Thu, 2 Jul 2015 08:36:56 +0000 (16:36 +0800)]
rtc: mt6397: enable wakeup before registering rtc device
rtc_sysfs_add_device checks if device can wakeup before creating the
wakealarm file in sysfs. Thus the driver must set wakeup capability
before registering the rtc device.
Signed-off-by: Wei-Ning Huang <wnhuang@google.com>
Acked-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Linus Torvalds [Fri, 17 Jul 2015 18:30:59 +0000 (11:30 -0700)]
Merge tag 'staging-4.2-rc3' of git://git./linux/kernel/git/gregkh/staging
Pull staging and IIO driver fixes from Greg KH:
"Here's some staging and IIO driver fixes for 4.2-rc3.
Nothing major, the majority are IIO issues that were reported, with a
few other minor staging driver fixes. All have been in linux-next for
a while with no reported issues"
* tag 'staging-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (25 commits)
staging: vt6656: check ieee80211_bss_conf bssid not NULL
staging: vt6655: check ieee80211_bss_conf bssid not NULL
staging:lustre: remove irq.h from socklnd.h
staging: make board support depend on OF_IRQ and CLKDEV_LOOKUP
iio: tmp006: Check channel info on write
iio: sx9500: Add missing init in sx9500_buffer_pre{en,dis}able()
iio:light:ltr501: fix regmap dependency
iio:light:ltr501: fix variable in ltr501_init
iio: sx9500: fix bug in compensation code
iio: sx9500: rework error handling of raw readings
iio: magnetometer: mmc35240: fix available sampling frequencies
iio:light:stk3310: Fix REGMAP_I2C dependency
iio: light: STK3310: un-invert proximity values
iio:adc:cc10001_adc: fix Kconfig dependency
iio: light: tcs3414: Fix bug preventing to set integration time
iio:accel:bmc150-accel: fix counting direction
iio:light:cm3323: clear bitmask before set
iio: adc: at91_adc: allow to use full range of startup time
iio: DAC: ad5624r_spi: fix bit shift of output data value
iio: proximity: sx9500: Fix proximity value
...
Linus Torvalds [Fri, 17 Jul 2015 18:24:31 +0000 (11:24 -0700)]
Merge tag 'usb-4.2-rc3' of git://git./linux/kernel/git/gregkh/usb
Pull USB driver fixes from Greg KH:
"Here's some USB driver fixes for 4.2-rc3.
The ususal number of gadget driver fixes are in here, along with some
new device ids and a build fix for the mn10300 arch which required
some symbols to be renamed in the mos7720 driver.
All have been in linux-next for a while with no reported issues"
* tag 'usb-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: serial: Destroy serial_minors IDR on module exit
usb: gadget: f_midi: fix error recovery path
usb: phy: mxs: suspend to RAM causes NULL pointer dereference
usb: gadget: udc: fix free_irq() after request_irq() failed
usb: gadget: composite: Fix NULL pointer dereference
usb: gadget: f_fs: do not set cancel function on synchronous {read,write}
usb: f_mass_storage: limit number of reported LUNs
usb: dwc3: core: avoid NULL pointer dereference
usb: dwc2: embed storage for reg backup in struct dwc2_hsotg
usb: dwc2: host: allocate qtd before atomic enqueue
usb: dwc2: host: allocate qh before atomic enqueue
usb: musb: host: rely on port_mode to call musb_start()
USB: cp210x: add ID for Aruba Networks controllers
USB: mos7720: rename registers
USB: option: add 2020:4000 ID
Linus Torvalds [Fri, 17 Jul 2015 17:54:30 +0000 (10:54 -0700)]
Merge tag 'sound-4.2-rc3' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"There are two small fixes for HD-audio and USB LINE6, and the rest are
a few new quirks and device ID addition that are good enough to get
into 4.2"
* tag 'sound-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek: Enable HP amp and mute LED on HP Folio 9480m [v3]
ALSA: line6: Fix -EBUSY error during active monitoring
ALSA: hda - Fix a wrong busy check in alt PCM open
ALSA: hda - add codec ID for Broxton display audio codec
ALSA: usb-audio: Add MIDI support for Steinberg MI2/MI4
Linus Torvalds [Fri, 17 Jul 2015 17:40:45 +0000 (10:40 -0700)]
Merge tag 'gpio-v4.2-2' of git://git./linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"This is a first set of GPIO fixes for the v4.2 series, all hitting
individual drivers and nothing else (except for a documentation
oneliner. I intended to send a request earlier but life intervened)"
* tag 'gpio-v4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: pca953x: fix nested irqs rescheduling
gpio: omap: prevent module from being unloaded while in use
gpio: max732x: Add missing dev reference to gpiochip
gpio/xilinx: Use correct address when setting initial values.
gpio: zynq: Fix problem with unbalanced pm_runtime_enable
gpio: omap: add missed spin_unlock_irqrestore in omap_gpio_irq_type
gpio: brcmstb: fix null ptr dereference in driver remove
gpio: Remove double "base" in comment
Olof Johansson [Fri, 17 Jul 2015 17:10:22 +0000 (10:10 -0700)]
Merge tag 'keystone-dts-fixes' of git://git./linux/kernel/git/ssantosh/linux-keystone into fixes
Merge "ARM: Couple of dts fixes for v4.2-rcx" from Santosh Shilimkar:
Couple of DTS fixes 4.2-rcx for Keystone EVMs:
K2E EVM boot hangs because of missing serdes driver which is needed to bring up
PCIe on K2E. These couple of fixes makes the PCIE disabled on common default and
let the specific board DTS to enable it.
* tag 'keystone-dts-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
ARM: keystone: dts: rename pcie nodes to help override status
ARM: keystone: dts: fix dt bindings for PCIe
Signed-off-by: Olof Johansson <olof@lixom.net>