Commit Graph

288379 Commits

Author SHA1 Message Date
Arnd Bergmann e7051e9dab Merge branch 'samsung/exynos5' into next/soc2 2012-03-15 21:07:57 +00:00
Arnd Bergmann 38abdcd0d0 Merge branch 'for-armsoc' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into next/soc2
Conflicts:
	arch/arm/mach-tegra/common.c
	arch/arm/mach-ux500/devices-common.c

This resolves two conflicts and lets us merge the exynos5 branch
cleanly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-03-15 21:05:52 +00:00
Arnd Bergmann 5da30bb6d9 Merge branch 'next/soc-exynos5250-arch' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into samsung/exynos5
* 'next/soc-exynos5250-arch' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: EXYNOS: Fix compilation error with mach-exynos4-dt board
  ARM: dts: add initial dts file for EXYNOS5250, SMDK5250
  ARM: EXYNOS: add support device tree enabled board file for EXYNOS5
  ARM: EXYNOS: add support ARCH_EXYNOS5 for EXYNOS5 SoCs
  ARM: EXYNOS: add support get_core_count() for EXYNOS5250
  ARM: EXYNOS: support EINT for EXYNOS4 and EXYNOS5
  ARM: EXYNOS: add interrupt definitions for EXYNOS5250
  ARM: EXYNOS: add support for EXYNOS5250 SoC
  ARM: EXYNOS: add support uart for EXYNOS4 and EXYNOS5
  ARM: EXYNOS: add initial setup-i2c0 for EXYNOS5
  ARM: EXYNOS: add clock part for EXYNOS5250 SoC
  ARM: EXYNOS: use exynos_init_uarts() instead of exynos4_init_uarts()
  ARM: EXYNOS: to declare static for mach-exynos/common.c
  ARM: EXYNOS: Add clkdev lookup entry for lcd clock
2012-03-15 21:02:26 +00:00
Tushar Behera efd5af0dc9 ARM: EXYNOS: Fix compilation error with mach-exynos4-dt board
Commit 171c067 ("ARM: EXYNOS: add support uart for EXYNOS4 and
EXYNOS5") renames S5P_PA_UARTn to EXYNOS4_PA_UARTn. Hence we
need to do similar modification in mach-exynos4-dt.c to fix
compilation error.

arch/arm/mach-exynos/mach-exynos4-dt.c:40:2: error: 'S5P_PA_UART0'
undeclared here (not in a function)

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 22:22:13 -07:00
Kukjin Kim b074abb719 ARM: dts: add initial dts file for EXYNOS5250, SMDK5250
This patch adds initial dts file for EXYNOS5250 SoC. This dts
file is including the SoC specific devices and properties. And
adds the dts file for SMDK5250 board which uses the EXYNOS5250
dts file. Its board specific properites will be added later.

Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 22:22:12 -07:00
Kukjin Kim b3e68fb17a ARM: EXYNOS: add support device tree enabled board file for EXYNOS5
This patch adds a new EXYNOS5 compatible device tree enabled board
When using this, a corresponding device tree blob which describes the
board's properties should be supplied at boot time to the kernel.

Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 22:22:06 -07:00
Kukjin Kim 23f16c7b7c ARM: EXYNOS: add support ARCH_EXYNOS5 for EXYNOS5 SoCs
This patch adds CONFIG_ARCH_EXYNOS5 and CONFIG_SOC_EXYNOS5250
for supporting EXYNOS5250 SoC and allows supporting EXYNOS4
and EXYNOS5 together.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:35:15 -07:00
Kukjin Kim e9bba61522 ARM: EXYNOS: add support get_core_count() for EXYNOS5250
The EXYNOS5250 has two Cortex-A15 cores and there's no
need to call scu_enable() in platform_smp_prepare_cpus()
because Cortex-A15 has no regarding scu register which
can be used for getting number of cores.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:35:15 -07:00
Eunki Kim 330c90a54c ARM: EXYNOS: support EINT for EXYNOS4 and EXYNOS5
The GPIOs of EXYNOS4 and EXYNOS5 are changed to use
ioremap instead of static mapping. It alse causes the
change of external interrupt IO mapping. This patch
changes EXYNOS4 to EXYNOS for common use and changes
EINT_x macros for supporting dynamic IO mapping.

Signed-off-by: Eunki Kim <eunki_kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:35:14 -07:00
Kukjin Kim bb19a7513d ARM: EXYNOS: add interrupt definitions for EXYNOS5250
This patch adds the interrupt definitions for EXYNOS5250 at
<mach/irqs.h> file and it is needed for EXYNOS5250 SoC.
As a note, for single zImage of EXYNOS4 and EXYNOS5, prefix
of EXYNOS4_ and EXYNOS5_ has been added.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:35:04 -07:00
Kukjin Kim 94c7ca71c4 ARM: EXYNOS: add support for EXYNOS5250 SoC
This patch add support for EXYNOS5250 SoC has two Cortex-A15 cores.
Since actually, most codes in mach-exynos/ are used commonly for
EXYNOS4 and EXYNOS5 the EXYNOS5/EXYNOS5250 has been implemented
in mach-exynos/.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:06 -07:00
Kukjin Kim 171c067c1a ARM: EXYNOS: add support uart for EXYNOS4 and EXYNOS5
Actually, the base address of uart is different between EXYNOS4
and EXYNOS5 and this patch enables to support uart for EXYNOS4
and EXYNOS5 SoCs at runtime.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:05 -07:00
Kukjin Kim b67545fd9b ARM: EXYNOS: add initial setup-i2c0 for EXYNOS5
In all of Samsung platform, the setup-i2c0.c file for I2C channel 0
is always compiled. So when supporting new SoC,it should be updated
for it. Since EXYNOS5 GPIO will be supported after this, there is no
setup gpio in there now. It will be implemented with that, of course.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:04 -07:00
Kukjin Kim 87b3c6ef1d ARM: EXYNOS: add clock part for EXYNOS5250 SoC
This patch adds clock-exynos5.c for EXYNOS5250 now
and that can be used for other EXYNOS5 SoCs later.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:03 -07:00
Kukjin Kim 920f488016 ARM: EXYNOS: use exynos_init_uarts() instead of exynos4_init_uarts()
Since exynos4_init_uarts() can be used for EXYNOS5 SoCs,
this patch changes the name of function to exynos_init_uarts().

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:03 -07:00
Kukjin Kim 906c789c64 ARM: EXYNOS: to declare static for mach-exynos/common.c
According to commit cc511b8d84 ("ARM: 7257/1: EXYNOS: introduce
arch/arm/mach-exynos/common.[ch]"), we don't need to declare extern
for exynos4_map_io(), exynos4_init_clocks(), exynos4_init_uarts(),
and exynos_init(). And the exynos4210_register_clocks() and
exynos4212_register_clocks depend on each SoC not ARCH_EXYNOS4.
So this patch fixed above.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:02 -07:00
Tushar Behera 7902546652 ARM: EXYNOS: Add clkdev lookup entry for lcd clock
The framebuffer driver needs the clock named 'lcd' as its bus
clock but the equivalent clock on Exynos4 is named as 'fimd'.
Hence, create a clkdev lookup entry with the name 'lcd' that
references the 'fimd' clock.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
[kgene.kim@samsung.com: rebased on top of latest samsung tree]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-14 02:13:01 -07:00
Boojin Kim efd9960b0e ARM: EXYNOS: add support DMA for EXYNOS4X12 SoC
Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:51:20 -08:00
Tushar Behera 8f7b13218b ARM: EXYNOS: Add apb_pclk clkdev entry for mdma1
Amba core assumes the pclk to be named as apb_pclk. During device probe,
it tries to get that clock and enable that. When PM_RUNTIME is enabled,
dma clock is not explicitly enabled in pl330_probe, which causes device
probe to fail. Adding a clkdev entry for apb_pclk for mdma1 fixes the
problem.

This patch fixes following runtime error.

dma-pl330 dma-pl330.2: PERIPH_ID 0x0, PCELL_ID 0x0 !
dma-pl330: probe of dma-pl330.2 failed with error -22

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:51:12 -08:00
Boojin Kim 9ed76e0336 ARM: EXYNOS: Enable MDMA driver
This patch adds MDMA platform data and enables
MDMA for DMA memcpy operation for EXYNOS SoCs.

Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:51:07 -08:00
MyungJoo Ham 44b2cef5ae ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver
EXYNOS4212/4412 memory bus devfreq driver requires some register
addresses that were not defined with EXYNOS4210 support.
This patch adds the required register addresses and shift/mask data.

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>
2012-03-10 22:30:32 -08:00
Jaecheol Lee d074de8ef5 ARM: EXYNOS: add clock registers for exynos4x12-cpufreq
Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:30:27 -08:00
MyungJoo Ham a2b9676db0 PM / devfreq: update the name of EXYNOS clock registers that were omitted
In the commit, "PM / devfreq: update the name of EXYNOS clock register"
ommitted one register.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:30:21 -08:00
Kukjin Kim 5fcc9297b8 PM / devfreq: update the name of EXYNOS clock register
According to replacing the name of EXYNOS clock registers,
this patch updates exynos4_bus.c file where it is used.

Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:30:16 -08:00
Kukjin Kim a855039ee4 ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock
This patch changes prefix of the clk register from S5P_ to
EXYNOS4_ for new EXYNOS SoCs such as EXYNOS5 and adds prefix
exynos4_ on clk declarations.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:29:01 -08:00
Kukjin Kim b1d6c5b26d ARM: EXYNOS: use static declaration on regarding clock
This patch uses static declaration struct which is not
used in other file and re-arrange with group in header
file.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:28:34 -08:00
Kukjin Kim ce9c00eea1 ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs
This patch changes the name of clock.c to clock-exynos4.c for other
EXYNOS series such as EXYNOS5. And since the header file of clock
is used only in arch/arm/mach-exynos, moves it in the local directory.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-03-10 22:28:09 -08:00
Kukjin Kim c15a04338b Merge branch 'next/cleanup-use-static' into next/cleanup-exynos-clock 2012-03-10 22:21:36 -08:00
Kukjin Kim 60571f98d2 Merge branch 'topic/cleanup-use-static' into next/cleanup-use-static
Conflicts:
	arch/arm/mach-exynos/dma.c
	arch/arm/mach-s5p64x0/dma.c
	arch/arm/mach-s5pc100/dma.c
	arch/arm/mach-s5pv210/dma.c
2012-03-07 03:34:41 -08:00
Arnd Bergmann 709baa67c6 Merge tag 'tegra-soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/tegra into tegra/soc2
From: Olof Johansson <olof@lixom.net>
Tegra 30 SMP support

I did this as a separate topic branch because it depends on both the
soc and the soc-drivers branch, so it brings both of those in as a base.

This branch contains work to enable SMP support on Tegra30 and reworks
some of the SMP bringup for T20 as well.

It also contains a device tree patch that builds on top of the SMP/clock
changes in the rest of the branch, so it made more sense to apply it
here than deal with the merge conflicts back and forth.

* tag 'tegra-soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/tegra:
  ARM: dt: Explicitly configure all serial ports on Tegra Cardhu
  ARM: tegra: support for secondary cores on Tegra30
  ARM: tegra: support for Tegra30 CPU powerdomains
  ARM: tegra: add support for Tegra30 powerdomains
  ARM: tegra: export tegra_powergate_is_powered()
  ARM: tegra: prepare powergate.c for multiple variants
  ARM: tegra: rework Tegra secondary CPU core bringup
  ARM: tegra: functions to access the flowcontroller
  ARM: tegra: initialize Tegra chipid early
  ARM: tegra: export Tegra chipid
  ARM: tegra: cleanup use of chipid register

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-03-04 21:20:46 +00:00
Stephen Warren 8c690fdf46 ARM: dt: Explicitly configure all serial ports on Tegra Cardhu
The ports are used as follows:
UART1/A: Routed to debug dongle
UART2/B: GPS
UART3/C: Bluetooth
UART4/D: Routed to debug dongle
UART5/E: Not connected

The debug dongle has jumpers to connect either UART1/A or UART4/D to
the DB-9 connector. UART1/A is typically used on Cardhu, and is the option
we assume here.

For now, only enable UART1/A, and explicitly disable all other ports.

The explicit disable prevents the message "of_serial 70006040.serial:
no clock-frequency property set" being printed during boot.

Enabling the other ports requires their clocks to be enabled, or accesses
to the registers will hang. At present, this requires adding entries into
board-dt-tegra30.c's tegra_dt_clk_init_table[]. Lets punt on that and wait
for the common clock bindings to set this all up, although that will also
requiring adding clock support to 8250.c.

While we're at it, fix board-dt-tegra30.c to enable the correct clock for
the debug UART. We got away with this before, because the bootloader already
enabled it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2012-03-04 10:47:30 -08:00
Linus Torvalds 192cfd5877 Linux 3.3-rc6 2012-03-03 17:08:09 -08:00
Linus Torvalds 8482a0abe9 SCSI fixes on 20120303
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6

SCSI fixes from James Bottomley:
 "There's just a single fix in here: the osd max device number fix."

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] osd_uld: Bump MAX_OSD_DEVICES from 64 to 1,048,576
2012-03-03 16:42:30 -08:00
Linus Torvalds 233ba2c5ff PARISC fixes on 20120303
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Merge tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6

PARISC fixes from James Bottomley:
 "This is a set of build fixes to get the cross compiled architecture
  testbeds building again"

* tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
  [PARISC] don't unconditionally override CROSS_COMPILE for 64 bit.
  [PARISC] include <linux/prefetch.h> in drivers/parisc/iommu-helpers.h
  [PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional
2012-03-03 16:33:51 -08:00
Linus Torvalds 001f3a4887 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/kvm: Fix Host-Only/Guest-Only counting with SVM disabled
2012-03-03 09:32:31 -08:00
Linus Torvalds 2ce3f2b3b1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull from Herbert Xu:
  "This push fixes a bug in mv_cesa that causes all hash operations
   that supply data on a final operation to fail."

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: mv_cesa - fix final callback not ignoring input data
2012-03-03 09:31:49 -08:00
Linus Torvalds ae942ae719 vfs: export full_name_hash() function to modules
Commit 5707c87f "vfs: uninline full_name_hash()" broke the modular
build, because it needs exporting now that it isn't inlined any more.

Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 19:40:57 -08:00
Linus Torvalds 62d222b8c8 Four commits since v3.3-rc5:
15d1ad0 hwmon: (f75375s) Catch some attempts to write to r/o registers
 b17d656 hwmon: (f75375s) Properly map the F75387 automatic modes to pwm_enable
 edeea10 hwmon: (f75375s) Make pwm*_mode writable for the F75387
 331255d hwmon: (f75375s) Fix writes to the pwm* attribute for the F75387
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

hhwmon fixes for 3.3-rc6 from Guenter Roeck:

These patches are necessary for correct operation and management of
F75387.

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (f75375s) Catch some attempts to write to r/o registers
  hwmon: (f75375s) Properly map the F75387 automatic modes to pwm_enable
  hwmon: (f75375s) Make pwm*_mode writable for the F75387
  hwmon: (f75375s) Fix writes to the pwm* attribute for the F75387
2012-03-02 15:21:48 -08:00
Linus Torvalds d085a09cf3 fbdev fixes for 3.3
It includes:
 - two fixes for OMAP HDMI
 - one fix to make new OMAP functions behave as they are supposed to
 - one Kconfig dependency fix
 - two fixes for viafb for modesetting on VX900 hardware
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Merge tag 'fbdev-fixes-for-3.3-2' of git://github.com/schandinat/linux-2.6

fbdev fixes for 3.3 from Florian Tobias Schandinat

It includes:
 - two fixes for OMAP HDMI
 - one fix to make new OMAP functions behave as they are supposed to
 - one Kconfig dependency fix
 - two fixes for viafb for modesetting on VX900 hardware

* tag 'fbdev-fixes-for-3.3-2' of git://github.com/schandinat/linux-2.6:
  OMAPDSS: APPLY: make ovl_enable/disable synchronous
  OMAPDSS: panel-dvi: Add Kconfig dependency on I2C
  viafb: fix IGA1 modesetting on VX900
  viafb: select HW scaling on VX900 for IGA2
  OMAPDSS: HDMI: hot plug detect fix
  OMAPDSS: HACK: Ensure DSS clock domain gets out of idle when HDMI is enabled
2012-03-02 15:21:15 -08:00
Linus Torvalds 5e8063d758 sound fixes for 3.3-rc6
This contains again regression fixes for various HD-audio and ASoC
 regarding SSI and dapm shutdown path.  In addition, a minor azt3328
 fix and the correction of the new jack-notification strings in HD-audio.
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Merge tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

sound fixes for 3.3-rc6 from Takashi Iwai

This contains again regression fixes for various HD-audio and ASoC
regarding SSI and dapm shutdown path.  In addition, a minor azt3328
fix and the correction of the new jack-notification strings in HD-audio.

* tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Kill hyphenated names
  ALSA: hda - Add a fake mute feature
  ALSA: hda - Always set HP pin in unsol handler for STAC/IDT codecs
  ALSA: azt3328 - Fix NULL ptr dereference on cards without OPL3
  ALSA: hda/realtek - Fix resume of multiple input sources
  ASoC: i.MX SSI: Fix DSP_A format.
  ASoC: dapm: Check for bias level when powering down
2012-03-02 15:20:41 -08:00
Linus Torvalds 200e9ef7ab vfs: split up name hashing in link_path_walk() into helper function
The code in link_path_walk() that finds out the length and the hash of
the next path component is some of the hottest code in the kernel.  And
I have a version of it that does things at the full width of the CPU
wordsize at a time, but that means that we *really* want to split it up
into a separate helper function.

So this re-organizes the code a bit and splits the hashing part into a
helper function called "hash_name()".  It returns the length of the
pathname component, while at the same time computing and writing the
hash to the appropriate location.

The code generation is slightly changed by this patch, but generally for
the better - and the added abstraction actually makes the code easier to
read too.  And the new interface is well suited for replacing just the
"hash_name()" function with alternative implementations.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 14:49:24 -08:00
Linus Torvalds 5707c87f20 vfs: clarify and clean up dentry_cmp()
It did some odd things for unclear reasons.  As this is one of the
functions that gets changed when doing word-at-a-time compares, this is
yet another of the "don't change any semantics, but clean things up so
that subsequent patches don't get obscured by the cleanups".

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 14:47:15 -08:00
Linus Torvalds 0145acc202 vfs: uninline full_name_hash()
.. and also use it in lookup_one_len() rather than open-coding it.

There aren't any performance-critical users, so inlining it is silly.
But it wouldn't matter if it wasn't for the fact that the word-at-a-time
dentry name patches want to conditionally replace the function, and
uninlining it sets the stage for that.

So again, this is a preparatory patch that doesn't change any semantics,
and only prepares for a much cleaner and testable word-at-a-time dentry
name accessor patch.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 14:32:59 -08:00
Linus Torvalds 8966be9030 vfs: trivial __d_lookup_rcu() cleanups
These don't change any semantics, but they clean up the code a bit and
mark some arguments appropriately 'const'.

They came up as I was doing the word-at-a-time dcache name accessor
code, and cleaning this up now allows me to send out a smaller relevant
interesting patch for the experimental stuff.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 14:23:30 -08:00
Nikolaus Schulz 15d1ad0cc9 hwmon: (f75375s) Catch some attempts to write to r/o registers
It makes no sense to attempt to manually configure the fan in auto mode,
or set the duty cycle directly in closed loop mode.  The corresponding
registers are then read-only.  If the user tries it nonetheless, error out
with EINVAL instead of silently doing nothing.

Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
[guenter.roeck@ericsson.com: Minor formatting cleanup]
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-03-02 12:02:23 -08:00
Nikolaus Schulz b17d6561ac hwmon: (f75375s) Properly map the F75387 automatic modes to pwm_enable
The F75387 supports automatic fan control using either PWM duty cycle or
RPM speed values.  Make the driver detect the latter mode, and expose the
different modes in sysfs as per pwm_enable, so that the user can switch
between them.

The interpretation of the pwm_enable attribute for the F75387 is adjusted
to be a superset of those values used for similar Fintek chips which do
not support automatic duty mode, with 2 mapping to automatic speed mode,
and moving automatic duty mode to the new value 4.

Toggling the duty mode via pwm_enable is currently denied for the F75387,
as the chip then simply reinterprets the fan configuration register values
according to the new mode, switching between RPM and PWM units, which
makes this a dangerous operation.

This patch introduces a new pwm mode into the driver. This is necessary
because the new mode (automatic pwm mode, 4) may already be enabled by the
BIOS, and the driver should not break existing functionality. This was seen
on at least one board.

Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-03-02 11:56:43 -08:00
Linus Torvalds 2273d5ccb8 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/tip
Pulling latest branches from Ingo:

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  memblock: Fix size aligning of memblock_alloc_base_nid()

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf probe: Ensure offset provided is not greater than function length without DWARF info too
  perf tools: Ensure comm string is properly terminated
  perf probe: Ensure offset provided is not greater than function length
  perf evlist: Return first evsel for non-sample event on old kernel
  perf/hwbp: Fix a possible memory leak

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume
2012-03-02 11:38:43 -08:00
H. Peter Anvin 5189fa19a4 regset: Return -EFAULT, not -EIO, on host-side memory fault
There is only one error code to return for a bad user-space buffer
pointer passed to a system call in the same address space as the
system call is executed, and that is EFAULT.  Furthermore, the
low-level access routines, which catch most of the faults, return
EFAULT already.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 11:38:15 -08:00
H. Peter Anvin c8e252586f regset: Prevent null pointer reference on readonly regsets
The regset common infrastructure assumed that regsets would always
have .get and .set methods, but not necessarily .active methods.
Unfortunately people have since written regsets without .set methods.

Rather than putting in stub functions everywhere, handle regsets with
null .get or .set methods explicitly.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-02 11:38:15 -08:00
Joerg Roedel 1018faa6cf perf/x86/kvm: Fix Host-Only/Guest-Only counting with SVM disabled
It turned out that a performance counter on AMD does not
count at all when the GO or HO bit is set in the control
register and SVM is disabled in EFER.

This patch works around this issue by masking out the HO bit
in the performance counter control register when SVM is not
enabled.

The GO bit is not touched because it is only set when the
user wants to count in guest-mode only. So when SVM is
disabled the counter should not run at all and the
not-counting is the intended behaviour.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Avi Kivity <avi@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: stable@vger.kernel.org # v3.2
Link: http://lkml.kernel.org/r/1330523852-19566-1-git-send-email-joerg.roedel@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-02 12:16:39 +01:00