Commit Graph

58726 Commits

Author SHA1 Message Date
H. Peter Anvin 4bb82178f5 x86, msr: Fix typo in ENERGY_PERF_BIAS_POWERSAVE
Fix a trivial typo in the name of the constant
ENERGY_PERF_BIAS_POWERSAVE.  This didn't cause trouble because this
constant is not currently used for anything.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/tip-abe48b108247e9b90b4c6739662a2e5c765ed114@git.kernel.org
2011-07-14 14:58:44 -07:00
Len Brown abe48b1082 x86, intel, power: Initialize MSR_IA32_ENERGY_PERF_BIAS
Since 2.6.36 (23016bf0d2), Linux prints the existence of "epb" in /proc/cpuinfo,
Since 2.6.38 (d5532ee7b4), the x86_energy_perf_policy(8) utility has
been available in-tree to update MSR_IA32_ENERGY_PERF_BIAS.

However, the typical BIOS fails to initialize the MSR, presumably
because this is handled by high-volume shrink-wrap operating systems...

Linux distros, on the other hand, do not yet invoke x86_energy_perf_policy(8).
As a result, WSM-EP, SNB, and later hardware from Intel will run in its
default hardware power-on state (performance), which assumes that users
care for performance at all costs and not for energy efficiency.
While that is fine for performance benchmarks, the hardware's intended default
operating point is "normal" mode...

Initialize the MSR to the "normal" by default during kernel boot.

x86_energy_perf_policy(8) is available to change the default after boot,
should the user have a different preference.

Signed-off-by: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1107140051020.18606@x980
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@kernel.org>
2011-07-14 12:13:42 -07:00
Linus Torvalds 7fc7693627 Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm:
  ARM: 6994/1: smp_twd: Fix typo in 'twd_timer_rate' printing
  ARM: 6987/1: l2x0: fix disabling function to avoid deadlock
  ARM: 6966/1: ep93xx: fix inverted RTS/DTR signals on uart1
  ARM: 6980/1: mmci: use StartBitErr to detect bad connections
  ARM: 6979/1: mach-vt8500: add forgotten irq_data conversion
  ARM: move memory layout sanity checking before meminfo initialization
  ARM: 6990/1: MAINTAINERS: add entry for ARM PMU profiling and debugging
  ARM: 6989/1: perf: do not start the PMU when no events are present
  ARM: dmabounce: fix map_single() error return value
2011-07-10 07:28:30 -07:00
Linus Torvalds f1a04dbd1e Merge branch 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung
* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S3C2440: fix section mismatch on mini2440
  ARM: S3C24XX: drop return codes in void function of dma.c
  ARM: S3C24XX: don't use uninitialized variable in dma.c
  ARM: EXYNOS4: Set appropriate I2C device variant
  ARM: S5PC100: Fix for compilation error
  spi/s3c64xx: Bug fix for SPI with different FIFO level
  ARM: SAMSUNG: Add tx_st_done variable
  ARM: EXYNOS4: Address a section mismatch w/ suspend issue.
  ARM: S5P: Fix bug on init of PWMTimers for HRTimer
  ARM: SAMSUNG: header file revised to prevent declaring duplicated
  ARM: EXYNOS4: fix improper gpio configuration
  ARM: EXYNOS4: Fix card detection for sdhci 0 and 2
2011-07-08 23:28:23 -07:00
Linus Torvalds c60ffcbb62 Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  omap: drop __initdata tags from static struct platform_device declarations
2011-07-08 09:00:02 -07:00
Wolfram Sang d34c1fcddc ARM: S3C2440: fix section mismatch on mini2440
If mini2440_init() is in __init, mini2440_parse_features() should also
be in __init. Fixes:

(.text+0x9adc): Section mismatch in reference from the function mini2440_parse_features.clone.0() to the
(unknown reference) .init.data:(unknown)
The function mini2440_parse_features.clone.0() references the (unknown reference) __initdata (unknown).

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Michel Pollet <buserror@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-08 18:16:56 +09:00
Wolfram Sang cb26a7b1c1 ARM: S3C24XX: drop return codes in void function of dma.c
Commit bb072c3c (ARM / Samsung: Use struct syscore_ops for "core" power
management) turned s3c2410_dma_resume_chan() from int to void. So, drop
the actual return values, too. Fixes:

arch/arm/plat-s3c24xx/dma.c: In function 's3c2410_dma_resume_chan':
arch/arm/plat-s3c24xx/dma.c:1238:3: warning: 'return' with a value, in function returning void
arch/arm/plat-s3c24xx/dma.c:1250:2: warning: 'return' with a value, in function returning void

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-08 14:34:05 +09:00
Wolfram Sang 5838e9b8da ARM: S3C24XX: don't use uninitialized variable in dma.c
Commit 8970ef47 (S3C24XX: Remove hardware specific registers from DMA
calls) removed the parameter dcon in s3c2410_dma_config() and calculates
it on its own. So the debug-output for the old parameter can go, too.
Fixes:

arch/arm/plat-s3c24xx/dma.c: In function 's3c2410_dma_config':
arch/arm/plat-s3c24xx/dma.c:1030:2: warning: 'dcon' is used uninitialized in this function

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-08 14:33:47 +09:00
Linus Torvalds 075d9db131 Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/pci: Move check for acpi_sci_override_gsi to xen_setup_acpi_sci.
2011-07-07 13:19:04 -07:00
Linus Torvalds e55f1b1c00 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Don't use the EFI reboot method by default
  x86, suspend: Restore MISC_ENABLE MSR in realmode wakeup
  x86, reboot: Acer Aspire One A110 reboot quirk
  x86-32, NUMA: Fix boot regression caused by NUMA init unification on highmem machines
2011-07-07 13:18:13 -07:00
Linus Torvalds 27a3b735b7 Merge branches 'core-urgent-for-linus', 'perf-urgent-for-linus' and 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  debugobjects: Fix boot crash when kmemleak and debugobjects enabled

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  jump_label: Fix jump_label update for modules
  oprofile, x86: Fix race in nmi handler while starting counters

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Disable (revert) SCHED_LOAD_SCALE increase
  sched, cgroups: Fix MIN_SHARES on 64-bit boxen
2011-07-07 13:17:45 -07:00
Konrad Rzeszutek Wilk ee339fe63a xen/pci: Move check for acpi_sci_override_gsi to xen_setup_acpi_sci.
Previously we would check for acpi_sci_override_gsi == gsi every time
a PCI device was enabled. That works during early bootup, but later
on it could lead to triggering unnecessarily the acpi_gsi_to_irq(..) lookup.
The reason is that acpi_sci_override_gsi was declared in __initdata and
after early bootup could contain bogus values.

This patch moves the check for acpi_sci_override_gsi to the
site where the ACPI SCI is preset.

CC: stable@kernel.org
Reported-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
Tested-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
[http://lists.xensource.com/archives/html/xen-devel/2011-07/msg00154.html]
Suggested-by:  Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-07-07 12:19:08 -04:00
Vitaly Kuzmichev 90c5ffe592 ARM: 6994/1: smp_twd: Fix typo in 'twd_timer_rate' printing
To get hundredths of MHz the rate needs to be divided by 10'000.
Here is an example:
 twd_timer_rate = 123456789
 Before the patch:
    twd_timer_rate / 1000000 = 123
    (twd_timer_rate / 1000000) % 100 = 23
    Result: 123.23MHz.
 After being fixed:
    twd_timer_rate / 1000000 = 123
    (twd_timer_rate / 10000) % 100 = 45
    Result: 123.45MHz.

Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-07 15:00:12 +01:00
Matthew Garrett f70e957cda x86: Don't use the EFI reboot method by default
Testing suggests that at least some Lenovos and some Intels will
fail to reboot via EFI, attempting to jump to an unmapped
physical address. In the long run we could handle this by
providing a page table with a 1:1 mapping of physical addresses,
but for now it's probably just easier to assume that ACPI or
legacy methods will be present and reboot via those.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/1309985557-15350-1-git-send-email-mjg@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-07-07 11:35:05 +02:00
Kees Cook 7a3136666b x86, suspend: Restore MISC_ENABLE MSR in realmode wakeup
Some BIOSes will reset the Intel MISC_ENABLE MSR (specifically the
XD_DISABLE bit) when resuming from S3, which can interact poorly with
ebba638ae7. In 32bit PAE mode, this can
lead to a fault when EFER is restored by the kernel wakeup routines,
due to it setting the NX bit for a CPU that (thanks to the BIOS reset)
now incorrectly thinks it lacks the NX feature. (64bit is not affected
because it uses a common CPU bring-up that specifically handles the
XD_DISABLE bit.)

The need for MISC_ENABLE being restored so early is specific to the S3
resume path. Normally, MISC_ENABLE is saved in save_processor_state(),
but this happens after the resume header is created, so just reproduce
the logic here. (acpi_suspend_lowlevel() creates the header, calls
do_suspend_lowlevel, which calls save_processor_state(), so the saved
processor context isn't available during resume header creation.)

[ hpa: Consider for stable if OK in mainline ]

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Link: http://lkml.kernel.org/r/20110707011034.GA8523@outflux.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: <stable@kernel.org> 2.6.38+
2011-07-06 20:09:34 -07:00
Will Deacon 38a8914f9a ARM: 6987/1: l2x0: fix disabling function to avoid deadlock
The l2x0_disable function attempts to writel with the l2x0_lock held.
This results in deadlock when the writel contains an outer_sync call
for the platform since the l2x0_lock is already held by the disable
function. A further problem is that disabling the L2 without flushing it
first can lead to the spin_lock operation becoming visible after the
spin_unlock, causing any subsequent L2 maintenance to deadlock.

This patch replaces the writel with a call to writel_relaxed in the
disabling code and adds a flush before disabling in the control
register, preventing livelock from occurring.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-06 20:48:08 +01:00
Petr Štetiar 186dcaa448 ARM: 6966/1: ep93xx: fix inverted RTS/DTR signals on uart1
It was discovered by Roberto Bergo, that RTS/DTR signals are inverted after
the boot, because it was causing him problems with hardware controlled modem
connected on ttyAM0. Todd Valentic came with this patch for the issue.

Discussion: http://tech.groups.yahoo.com/group/ts-7000/message/20259

Comments from Petr Štetiar:

 Sorry, but forget to add Acked-by[1]:

 1. https://patchwork.kernel.org/patch/873052/

Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Todd Valentic <todd.valentic@sri.com>
Tested-by: Roberto Bergo <roberto.bergo@robson.it>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-06 20:46:36 +01:00
Wolfram Sang 2eb5af44b1 ARM: 6979/1: mach-vt8500: add forgotten irq_data conversion
This platform has not been converted to 'struct irq_data' when the big
pile was done and fails to compile nowadays. Tested on a JayPC-Tablet.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-06 20:46:04 +01:00
Sylwester Nawrocki 5f27275edb ARM: EXYNOS4: Set appropriate I2C device variant
Set up a correct I2C bus controller variant name for Exynos4.
Without this change the I2C bus driver fails to acquire its
clocks.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 16:04:09 +09:00
Kukjin Kim d60c98c26a Merge branch 'for-spi' into s5p-fixes-for-linus 2011-07-06 15:46:41 +09:00
Padmavathi Venna 8fa9dd04b7 ARM: S5PC100: Fix for compilation error
S5PC100 Compilation fails without this patch

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 15:37:08 +09:00
Padmavathi Venna 8918034dfb ARM: SAMSUNG: Add tx_st_done variable
tx_st_done is required for checking the transmission status of SPI
channels with different fifo levels

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 15:03:08 +09:00
Peter Chubb b49c78d482 x86, reboot: Acer Aspire One A110 reboot quirk
Since git commit
  660e34cebf x86: reorder reboot method
  preferences,
my Acer Aspire One hangs on reboot.  It appears that its ACPI method
for rebooting is broken.  The attached patch adds a quirk so that the
machine will reboot via the BIOS.

[ hpa: verified that the ACPI control on this machine is just plain broken. ]

Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Link: http://lkml.kernel.org/r/w439iki5vl.wl%25peter@chubb.wattle.id.au
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-07-05 19:43:23 -07:00
MyungJoo Ham 152c036a80 ARM: EXYNOS4: Address a section mismatch w/ suspend issue.
The section mismatch in headsmp.S made hotplug stop working after the
first instance of suspend-to-RAM and its wakeup.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 08:43:03 +09:00
Sangbeom Kim 27ea7fd288 ARM: S5P: Fix bug on init of PWMTimers for HRTimer
This patch fixes following.

<6>[    0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[  128.651309] Calibrating delay loop...

There is a big jump. The reason is that PWM Timer which
is for HRTimer was used before its initialization.

So this patch changes its order and following is kernel
boot log message after this.

<6>[    0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[    0.000088] Calibrating delay loop...

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 08:43:02 +09:00
MyungJoo Ham bb8bb57b21 ARM: SAMSUNG: header file revised to prevent declaring duplicated
There has been no #ifndef - #define - #endif protection for this
header file.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 08:43:02 +09:00
Naveen Krishna Chatradhi a3df1d4811 ARM: EXYNOS4: fix improper gpio configuration
These pins are incorrectly configured for PCM2
configure them to SPDIF(_OUT & _EXT_CLK)

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 08:43:02 +09:00
Thomas Abraham a0d8efedb2 ARM: EXYNOS4: Fix card detection for sdhci 0 and 2
On SMDKV310 board, a card detect gpio pin is available that is directly
connected to the io pad of the sdhci controller. Fix incorrect value
of cd_type field in platform data for sdhci instance 0 and 2.

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 08:43:02 +09:00
Russell King 0371d3f7e8 ARM: move memory layout sanity checking before meminfo initialization
Ensure that the meminfo array is sanity checked before we pass the
memory to memblock.  This helps to ensure that memblock and meminfo
agree on the dimensions of memory, especially when more memory is
passed than the kernel can deal with.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-05 20:27:16 +01:00
Will Deacon f4f38430c9 ARM: 6989/1: perf: do not start the PMU when no events are present
armpmu_enable can be called in situations where no events are present
(for example, from the event rotation tick after a profiled task has
exited). In this case, we currently start the PMU anyway which may
leave it active inevitably without any events being monitored.

This patch adds a simple check to the enabling code so that we avoid
starting the PMU when no events are present.

Cc: <stable@kernel.org>
Reported-by: Ashwin Chaugle <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-05 12:37:23 +01:00
Linus Torvalds fc52693f8f Merge branch 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc
* 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc:
  AT91: Change nand buswidth logic to match hardware default configuration
  at91: Use "pclk" as con_id on at91cap9 and at91rm9200
  at91: fix udc, ehci and mmc clock device name for cap9/9g45/9rl
  atmel_serial: fix internal port num
  at91: fix at91_set_serial_console: use platform device id
2011-07-04 15:54:18 -07:00
Nicolas Ferre 64393b3ae4 AT91: Change nand buswidth logic to match hardware default configuration
The recently modified nand buswitth configuration is not aligned with
board reality: the double footprint on boards is always populated with 8bits
buswidth nand flashes.
So we have to consider that without particular configuration the 8bits
buswidth is selected by default.
Moreover, the previous logic was always using !board_have_nand_8bit(), we
change it to a simpler: board_have_nand_16bit().

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2011-07-04 23:22:25 +02:00
Janusz Krzysztofik 07ad6ab3d7 omap: drop __initdata tags from static struct platform_device declarations
Pointers to statically declared platform device structures which are
registered with platform_device_register() are then used during run time
to access these structure members, for example from platform_uevent()
and much more. Therefore, these structures should never be placed inside
sections which are dropped after boot. Fix platform devices incorrectly
tagged with __initdata which happen to exist inside OMAP sub-trees.

This bug has exhibited itself on my ARM/OMAP1 based Amstrad Delta
videophone after commit 6d3163ce86, "mm:
check if any page in a pageblock is reserved before marking it
MIGRATE_RESERVE", resulting in reading from several
/sys/device/platform/*/uevent files always ending up with segmentation
faults.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Varadarajan, Charulatha <charu@ti.com>
Cc: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-07-04 03:56:15 -07:00
Russell King 178783622c ARM: dmabounce: fix map_single() error return value
When map_single() is unable to obtain a safe buffer, we must return
the dma_addr_t error value, which is ~0 rather than 0.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-03 23:24:21 +01:00
Linus Torvalds c9e0b84545 Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/pci: Use the INT_SRC_OVR IRQ (instead of GSI) to preset the ACPI SCI IRQ.
  xen/mmu: Fix for linker errors when CONFIG_SMP is not defined.
2011-07-01 13:25:56 -07:00
Tejun Heo a26474e864 x86-32, NUMA: Fix boot regression caused by NUMA init unification on highmem machines
During 32/64 NUMA init unification, commit 797390d855 ("x86-32,
NUMA: use sparse_memory_present_with_active_regions()") made
32bit mm init call memory_present() automatically from
active_regions instead of leaving it to each NUMA init path.

This commit description is inaccurate - memory_present() calls
aren't the same for flat and numaq.  After the commit,
memory_present() is only called for the intersection of e820 and
NUMA layout.  Before, on flatmem, memory_present() would be
called from 0 to max_pfn.  After, it would be called only on the
areas that e820 indicates to be populated.

This is how x86_64 works and should be okay as memmap is allowed
to contain holes; however, x86_32 DISCONTIGMEM is missing
early_pfn_valid(), which makes memmap_init_zone() assume that
memmap doesn't contain any hole.  This leads to the following
oops if e820 map contains holes as it often does on machine with
near or more 4GiB of memory by calling pfn_to_page() on a pfn
which isn't mapped to a NUMA node, a reported by Conny Seidel:

  BUG: unable to handle kernel paging request at 000012b0
  IP: [<c1aa13ce>] memmap_init_zone+0x6c/0xf2
  *pdpt =3D 0000000000000000 *pde =3D f000eef3f000ee00
  Oops: 0000 [#1] SMP
  last sysfs file:
  Modules linked in:

  Pid: 0, comm: swapper Not tainted 2.6.39-rc5-00164-g797390d #1 To Be Filled By O.E.M. To Be Filled By O.E.M./E350M1
  EIP: 0060:[<c1aa13ce>] EFLAGS: 00010012 CPU: 0
  EIP is at memmap_init_zone+0x6c/0xf2
  EAX: 00000000 EBX: 000a8000 ECX: 000a7fff EDX: f2c00b80
  ESI: 000a8000 EDI: f2c00800 EBP: c19ffe54 ESP: c19ffe34
   DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
  Process swapper (pid: 0, ti=3Dc19fe000 task=3Dc1a07f60 task.ti=3Dc19fe000)
  Stack:
   00000002 00000000 0023f000 00000000 10000000 00000a00 f2c00000 f2c00b58
   c19ffeb0 c1a80f24 000375fe 00000000 f2c00800 00000800 00000100 00000030
   c1abb768 0000003c 00000000 00000000 00000004 00207a02 f2c00800 000375fe
  Call Trace:
   [<c1a80f24>] free_area_init_node+0x358/0x385
   [<c1a81384>] free_area_init_nodes+0x420/0x487
   [<c1a79326>] paging_init+0x114/0x11b
   [<c1a6cb13>] setup_arch+0xb37/0xc0a
   [<c1a69554>] start_kernel+0x76/0x316
   [<c1a690a8>] i386_start_kernel+0xa8/0xb0

This patch fixes the bug by defining early_pfn_valid() to be the
same as pfn_valid() when DISCONTIGMEM.

Reported-bisected-and-tested-by: Conny Seidel <conny.seidel@amd.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: hans.rosenfeld@amd.com
Cc: Christoph Lameter <cl@linux.com>
Cc: Conny Seidel <conny.seidel@amd.com>
Link: http://lkml.kernel.org/r/20110628094107.GB3386@htj.dyndns.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-07-01 13:38:51 +02:00
Linus Torvalds 3b775e2246 Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  watchdog: update author email for at32ap700x_wdt
  watchdog: gef_wdt: fix MODULE_ALIAS
  watchdog: Intel SCU Watchdog: Fix build and remove duplicate code
  watchdog: mtx1-wdt: fix section mismatch
  watchdog: mtx1-wdt: fix GPIO toggling
  watchdog: mtx1-wdt: request gpio before using it
  watchdog: Handle multiple wm831x watchdogs being registered
2011-06-30 10:43:57 -07:00
Linus Torvalds c8618d16f9 Merge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x:
  sh: use printk_ratelimited instead of printk_ratelimit
  sh: Fix up unmet dependency warnings with USB EHCI/OHCI selects.
  sh: fix the value of sh_dmae_slave_config in setup-sh7757
  sh: fix the INTC vector for IRQ and IRL in setup-sh7757
  sh: add to select the new configuration for USB EHCI/OHCI
  sh: add platform_device of EHCI/OHCI to setup-sh7757
  sh: fix compile error using sh7757lcr_defconfig
2011-06-30 10:43:22 -07:00
Linus Torvalds 427e3df6f2 Merge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x
* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x:
  ARM: mach-shmobile: make a struct in board-ap4evb.c static
  ARM: mach-shmobile: ag5evm: consistently name sdhi info structures
  ARM: mach-shmobile: mackerel: change usbhs devices order
2011-06-30 10:43:04 -07:00
Konrad Rzeszutek Wilk 155a16f219 xen/pci: Use the INT_SRC_OVR IRQ (instead of GSI) to preset the ACPI SCI IRQ.
In the past we would use the GSI value to preset the ACPI SCI
IRQ which worked great as GSI == IRQ:

ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)

While that is most often seen, there are some oddities:

ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)

which means that GSI 20 (or pin 20) is to be overriden for IRQ 9.
Our code that presets the interrupt for ACPI SCI however would
use the GSI 20 instead of IRQ 9 ending up with:

xen: sci override: global_irq=20 trigger=0 polarity=1
xen: registering gsi 20 triggering 0 polarity 1
xen: --> pirq=20 -> irq=20
xen: acpi sci 20
.. snip..
calling  acpi_init+0x0/0xbc @ 1
ACPI: SCI (IRQ9) allocation failed
ACPI Exception: AE_NOT_ACQUIRED, Unable to install System Control Interrupt handler (20110413/evevent-119)
ACPI: Unable to start the ACPI Interpreter

as the ACPI interpreter made a call to 'acpi_gsi_to_irq' which got nine.
It used that value to request an IRQ (request_irq) and since that was not
present it failed.

The fix is to recognize that for interrupts that are overriden (in our
case we only care about the ACPI SCI) we should use the IRQ number
to present the IRQ instead of the using GSI. End result is that we get:

xen: sci override: global_irq=20 trigger=0 polarity=1
xen: registering gsi 20 triggering 0 polarity 1
xen: --> pirq=20 -> irq=9 (gsi=9)
xen: acpi sci 9

which fixes the ACPI interpreter failing on startup.

CC: stable@kernel.org
Reported-by: Liwei <xieliwei@gmail.com>
Tested-by: Liwei <xieliwei@gmail.com>
[http://lists.xensource.com/archives/html/xen-devel/2011-06/msg01727.html]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-30 11:23:39 -04:00
Konrad Rzeszutek Wilk 32dd11942a xen/mmu: Fix for linker errors when CONFIG_SMP is not defined.
Simple enough - we use an extern defined symbol which is not
defined when CONFIG_SMP is not defined. This fixes the linker
dying.

CC: stable@kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-30 09:21:10 -04:00
Paul Mundt 9ab3a15d95 sh: use printk_ratelimited instead of printk_ratelimit
Follows the powerpc change, for much the same rationale.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-30 15:10:06 +09:00
Paul Mundt 7b61ca5d94 sh: Fix up unmet dependency warnings with USB EHCI/OHCI selects.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-30 15:04:38 +09:00
Guennadi Liakhovetski 4d4d6fbb7c ARM: mach-shmobile: make a struct in board-ap4evb.c static
struct soc_camera_link imx074_link in board-ap4evb.c doesn't have
to be global.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-30 14:37:06 +09:00
Linus Torvalds c017d0d135 Merge branch 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86 emulator: fix %rip-relative addressing with immediate source operand
2011-06-29 11:07:20 -07:00
Linus Torvalds 78a3cc38f7 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  arch/powerpc: use printk_ratelimited instead of printk_ratelimit
  powerpc/rtas-rtc: remove sideeffects of printk_ratelimit
  powerpc/pseries: remove duplicate SCSI_BNX2_ISCSI in pseries_defconfig
  powerpc/e500: fix breakage with fsl_rio_mcheck_exception
  powerpc/p1022ds: fix audio-related properties in the device tree
  powerpc/85xx: fix NAND_CMD_READID read bytes number
2011-06-29 11:03:27 -07:00
Yoshihiro Shimoda 6afba9e7fc sh: fix the value of sh_dmae_slave_config in setup-sh7757
Fix the value of chcr for SCIF[2-4]_RX and RIIC[0-9]_RX and
the value of mid_rid for some RIIC.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-29 17:37:30 +09:00
Yoshihiro Shimoda b00c2c79d9 sh: fix the INTC vector for IRQ and IRL in setup-sh7757
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-29 17:37:29 +09:00
Avi Kivity cb16c34876 KVM: x86 emulator: fix %rip-relative addressing with immediate source operand
%rip-relative addressing is relative to the first byte of the next instruction,
so we need to add %rip only after we've fetched any immediate bytes.

Based on original patch by Li Xin <xin.li@intel.com>.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Li Xin <xin.li@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-06-29 10:09:25 +03:00
Christian Dietrich 76462232c2 arch/powerpc: use printk_ratelimited instead of printk_ratelimit
Since printk_ratelimit() shouldn't be used anymore (see comment in
include/linux/printk.h), replace it with printk_ratelimited.

Signed-off-by: Christian Dietrich <christian.dietrich@informatik.uni-erlangen.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-06-29 15:31:01 +10:00