Due to a possible deadlock, the waking of the softirq was pushed outside
of the hrtimer base locks. See commit 0c96c5979a
Unfortunately this allows the task to migrate after setting up the softirq
and raising it. Since softirqs run a queue that is per-cpu we may raise the
softirq on the wrong CPU and this will keep the queued softirq task from
running.
To solve this issue, this patch disables preemption around the releasing
of the hrtimer lock and raising of the softirq.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The txx9_tmr_init() will not clear a timer counter register in a certain
case. The counter register is cleared on 1->0 transition of TCE bit if
CRE=1. So just clearing the TCE bit is not enough.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The introduction of a real dma cache invalidate makes it important
to have a correct cache line size, otherwise the kernel will gives
out two memory segment, which might share one cache line. The R4400
Indy/Indigo2 CPU modules are using a second level cache line size
of 128 bytes, so MIPS_L1_CACHE_SHIFT needs to be bumped up to 7 for
IP22.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
It's possible that the crime interrupt handler is called without
pending interrupts (probably a hardware issue). To avoid irritating
"unexpected irq 71" messages, we now just ignore the spurious crime
interrupts.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The non-NUMA case of build_zonelist_cache() would initialize the
zlcache_ptr for both node_zonelists[] to NULL.
Which is problematic, since non-NUMA only has a single node_zonelists[]
entry, and trying to zero the non-existent second one just overwrote the
nr_zones field instead.
As kswapd uses this value to determine what reclaim work is necessary,
the result is that kswapd never reclaims. This causes processes to
stall frequently in low-memory situations as they always direct reclaim.
This patch initialises zlcache_ptr correctly.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Tested-by: Dan Williams <dan.j.williams@intel.com>
[ Simplified patch a bit ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The 192 byte cache is not necessary if we have a basic alignment of 128
byte. If it would be used then the 192 would be aligned to the next 128 byte
boundary which would result in another 256 byte cache. Two 256 kmalloc caches
cause sysfs to complain about a duplicate entry.
MIPS needs 128 byte aligned kmalloc caches and spits out warnings on boot without
this patch.
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
The S3C2410 serial driver in drivers/serial/s3c2410.c has been
growing bigger with the addition of more variants of this hardware
with the growing Samsung SoCs range. As such, it would be
easier to split this code up into a core and per-cpu drivers to
make driver addition easier, and the core smaller.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
For s3c2412, set parent for clk_erefclk and clk_urefclk.
This allow for example to use xtal or extclk for i2s clock.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Matthieu Castet <matthieu.castet@parrot.com>
Move to using the physmap platform device code to attached NOR
flash on Simtec boards so that the old bast-flash driver can be
safely removed.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Change the (as yet unused) IDE bus on the Simtec Anubis board
to use pata_platform and thus libata to provide IDE support.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Use the pata_platform driver to provide the IDE port
drivers on the Simntec BAST and Thorcom VR1000 machines
as a precursor to removing drivers/ide/arm/bast-ide.c
This will mean that the system will need SCSI and SCSI disc
support as a minimum, and any references to hdX will be
changed to sdX.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add the definitions for the VGG2432A4 intelligent
LCD display conneected via an GPIO-based SPI bus
on the Logitech Jive.
Signed-of-by: Ben Dooks <ben-linux@fluff.org>
Ensure that the S3C2412 sleep configuration registers
are approriately setup so that the device can safely
go to sleep.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add timer defines for the MUX settings for
each of the PWM timers to add to the per-timer
defines already in the file.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Enable SCSI support, mainly to help with adding
USB storage support later and for the imminent
changes for libata.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add the following to the networking confgiuration:
1) Packet socket support (useful for userland dhcp)
2) Add bluetooth and USB bluetooth drivers as modules
3) Add basic IPv6 support as modules.
4) Add the wireless core as modules.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Enable new filesystem options, such as:
- JFFS2 summary nodes
- Ext2/3 externed options
- Standard CDROM filesystems
Also add NTFS as a module.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add attribute to show the current clock source for the serial
driver and remove old and annoying debug output.
Note, this only currently shows the current source with a
"* " prefix to indicate that it is the current source. Future
code will list all the clock sources, with the non-selected
one with " " prefix.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
PATCH FOLLOWS
KernelVersion: 2.6.26-rc3
Fix the flags entries for the DM9000 IRQ entries on both the
Simtec BAST and Thorcom VR1000 board. The current entries use
the IRQF_ flags, but we should be using the IORESOURCE_IRQ_
definitions.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
PATCH FOLLOWS
KernelVersion: 2.6.26-rc5
imx_dma_request_by_prio can return channel number by itself.
No need to supply variable address through parameters.
Also converted all drivers using this function.
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM architecture is not using __do_IRQ
Acked-By: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch adds the I-cache invalidation in update_mmu_cache if the
corresponding vma is marked as executable. It also invalidates the
I-cache if a thread migrates to a CPU it never ran on.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch annotates the platform_secondary_init function in
arch/arm/mach-realview/platsmp.c with trace_hardirqs_off to avoid a
warning when LOCKDEP and TRACE_IRQFLAGS are enabled.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: OMAP1: N770: The semaphore audio_pwr_sem is used as a
mutex. Convert it to the mutex API
[akpm@linux-foundation.org: include mutex.h]
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The config option for building drivers/acorn/char/defkeymap-l7200.c is
not present since at least kernel 2.6.0.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The original driver had an MODULE_LICENSE statement for GPL,
but no explict license in the header of the file. To make
this more explicit, and since I am the original authour,
we will add a GPLv2 header.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Remove the changelog which should really be found
in the version control system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
