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2012-09-12ARM: OMAP: Remove unused old gpio-switch.hTony Lindgren
This is no longer used anywhere. Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP1: Move plat/irqs.h to mach/irqs.hTony Lindgren
This is now omap1 specific files. Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP2+: Remove hardcoded IRQs and enable SPARSE_IRQTony Lindgren
Remove hardcoded IRQs in irqs.h and related files as these are no longer needed. Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP2+: Prepare for irqs.h removalTony Lindgren
As the interrupts should only be defined in the platform_data, and eventually coming from device tree, there's no need to define them in header files. Let's remove the hardcoded references to irqs.h and fix up the includes so we don't rely on headers included in irqs.h. Note that we're defining OMAP_INTC_START as 0 to the interrupts. This will be needed when we enable SPARSE_IRQ. For some drivers we need to add #include <plat/cpu.h> for now until these drivers are fixed to remove cpu_is_omapxxxx() usage. While at it, sort som of the includes the standard way, and add the trailing commas where they are missing in the related data structures. Note that for drivers/staging/tidspbridge we just define things locally. Cc: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP: Move gpio.h to include/linux/platform_dataTony Lindgren
This way we can remove includes of plat/gpio.h which won't work with the single zImage support. Note that we also remove the cpu_class_is_omap2() check in gpio-omap.c as the drivers should not call it as we need to make it local to arch/arm/mach-omap2 for single zImage support. While at it, arrange the related includes in the standard way. Cc: Grant Likely <grant.likely@secretlab.ca> Cc: linux-mtd@lists.infradead.org Cc: alsa-devel@alsa-project.org Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP2+: Remove hardcoded twl4030 gpio_base, irq_base and irq_endTony Lindgren
We can't use hardcoded interrupts for SPARSE_IRQ, and can replace the hardcoded gpio_base with twl_gpiochip.base after it's been allocated. Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP2+: Remove unused nand_irq for GPMCTony Lindgren
This is no longer needed and assumes a fixed IRQ number that won't work with SPARSE_IRQ. Acked-by: Afzal Mohammed <afzal@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP2+: Make INTCPS_NR_IRQS local for mach-omap2/irq.cTony Lindgren
Make INTCPS_NR_IRQS local for mach-omap2/irq.c Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP1: Define OMAP1_INT_I2C locallyTony Lindgren
This is needed to start removing hardcoded IRQs for omap2+. Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12ARM: OMAP1: Move define of OMAP_LCD_DMA to dma.hTony Lindgren
This is needed to start removing hardcoded IRQs on omap2+. Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-12Merge tags 'omap-devel-gpmc-fixed-for-v3.7' and 'cleanup-omap-tags-for-v3.7' ↵Tony Lindgren
into cleanup-sparseirq Changes for GPMC (General Purpose Memory Controller) that take it closer for being just a regular device driver. Remove the ancient omap specific atags that are no longer needed. At some point we were planning to pass the bootloader information with custom atags that did not work out too well. There's no need for these any longer as the kernel has been booting fine without them for quite some time. And Now we have device tree support that can be used instead.
2012-09-10ARM: OMAP: remove plat/board.h fileIgor Grinberg
plat/board.h file is now empty - remove it. Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com> Cc: Chris Ball <cjb@laptop.org> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-mmc@vger.kernel.org Cc: linux-mtd@lists.infradead.org Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Chris Ball <cjb@laptop.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP: move debug_card_init() functionIgor Grinberg
debug_card_init() function resides in the plat/board.h file. Move it to a separate header file under plat/ so the board.h file can be removed. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP1: move lcd pdata out of arch/arm/*Igor Grinberg
omap1 lcd platform data resides inside plat/board.h while it should be inside include/linux/... Move the omap1 lcd platform data to include/linux/omapfb.h. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP1: move omap1_bl pdata out of arch/arm/*Igor Grinberg
omap1 backlight platform data resides inside plat/board.h while it should be inside include/linux/... Move the omap1 backlight platform data to include/linux/platform_data/. Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: linux-fbdev@vger.kernel.org Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP: remove the omap custom tagsIgor Grinberg
The omap custom initialization tags are not used anymore (if ever) by the mainline kernel. Thus remove the omap custom initialization tags. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP1: remove the crystal type tag parsingIgor Grinberg
The omap1 crystal setting uses the OMAP custom tags. Those tags are not used in upstream kernel and therefore the crystal type is never set by the tag parsing code on upstream kernels. Remove the crystal tag parsing code. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP: remove the sti console workaroundIgor Grinberg
The sti console workaround uses the OMAP custom tags. Those tags are not used in upstream kernel and therefore the workaround never fires on upstream kernels. Remove the sti console workaround tags part. This leaves the workaround functional part intact so can be reused if needed. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10ARM: OMAP: omap3evm: cleanup revision bitsIgor Grinberg
The omap3evm has its revision information bits inside the plat/board.h file. Those bits are not used anywhere in the upstream tree besides the board-omap3evm.c file. Move the OMAP3EVM_BOARD_GEN_* bits to the board file and remove the get_omap3_evm_rev() function declaration. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-10serial: pl011: delete reset callbackLinus Walleij
Since commit 4fd0690bb0c3955983560bb2767ee82e2b197f9b "serial: pl011: implement workaround for CTS clear event issue" the PL011 UART is no longer at risk to hang up, so get rid of the callback altogether. Cc: Rajanikanth H.V <rajanikanth.hv@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-10ARM: OMAP: cleanup struct omap_board_config_kernelIgor Grinberg
struct omap_board_config_kernel defined in the board files is always empty and does not bring any added value. Remove the struct omap_board_config_kernel instances from the board files. Also remove the omap_get_nr_config() macro and the omap_get_var_config() function as both are not used for quite a long time (if ever). Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-08Merge branch 'fixes-for-3.6' of ↵Linus Torvalds
git://git.linaro.org/people/mszyprowski/linux-dma-mapping Pull DMA-mapping fixes from Marek Szyprowski: "Another set of fixes for ARM dma-mapping subsystem. Commit e9da6e9905e6 replaced custom consistent buffer remapping code with generic vmalloc areas. It however introduced some regressions caused by limited support for allocations in atomic context. This series contains fixes for those regressions. For some subplatforms the default, pre-allocated pool for atomic allocations turned out to be too small, so a function for setting its size has been added. Another set of patches adds support for atomic allocations to IOMMU-aware DMA-mapping implementation. The last part of this pull request contains two fixes for Contiguous Memory Allocator, which relax too strict requirements." * 'fixes-for-3.6' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages() ARM: dma-mapping: Refactor out to introduce __in_atomic_pool ARM: dma-mapping: atomic_pool with struct page **pages ARM: Kirkwood: increase atomic coherent pool size ARM: DMA-Mapping: print warning when atomic coherent allocation fails ARM: DMA-Mapping: add function for setting coherent pool size from platform code ARM: relax conditions required for enabling Contiguous Memory Allocator mm: cma: fix alignment requirements for contiguous regions
2012-09-07serial: omap: fix compile breakageFelipe Balbi
when rebasing patches on top of Greg's tty-next, it looks like automerge broke a few things which I didn't catch (for whatever reason I didn't have OMAP Serial enabled on .config) so I ended up breaking the build on Greg's tty-next branch. Fix the breakage by re-adding the three missing members on struct uart_omap_port. Reported-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-06Merge tag 'stable/for-linus-3.6-rc4-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen bug-fixes from Konrad Rzeszutek Wilk: * Fix for TLB flushing introduced in v3.6 * Fix Xen-SWIOTLB not using proper DMA mask - device had 64bit but in a 32-bit kernel we need to allocate for coherent pages from a 32-bit pool. * When trying to re-use P2M nodes we had a one-off error and triggered a BUG_ON check with specific CONFIG_ option. * When doing FLR in Xen-PCI-backend we would first do FLR then save the PCI configuration space. We needed to do it the other way around. * tag 'stable/for-linus-3.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pciback: Fix proper FLR steps. xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory.
2012-09-06Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC bug fixes from Olof Johansson: "Mostly Renesas and Atmel bugfixes this time, targeting boot and build problems. A couple of patches for gemini and kirkwood as well. On a whole nothing very controversial." * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: gemini: fix the gemini build ARM: shmobile: armadillo800eva: enable rw rootfs mount ARM: Kirkwood: Fix 'SZ_1M' undeclared here for db88f6281-bp-setup.c ARM: shmobile: mackerel: fixup usb module order ARM: shmobile: armadillo800eva: fixup: sound card detection order ARM: shmobile: marzen: fixup smsc911x id for regulator ARM: at91/feature-removal-schedule: delay at91_mci removal ARM: mach-shmobile: armadillo800eva: Enable power button as wakeup source ARM: mach-shmobile: armadillo800eva: Fix GPIO buttons descriptions ARM: at91/dts: remove partial parameter in at91sam9g25ek.dts ARM: at91/clock: fix PLLA overclock warning ARM: at91: fix rtc-at91sam9 irq issue due to sparse irq support ARM: at91: fix system timer irq issue due to sparse irq support ARM: shmobile: sh73a0: fixup RELOC_BASE of intca_irq_pins_desc
2012-09-06serial: omap: move uart_omap_port definition to C fileFelipe Balbi
nobody needs to access the uart_omap_port structure other than omap-serial.c file. Let's move that structure definition to the C source file in order to prevent anyone from accessing our structure. Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-06serial: omap: fix software flow controlVikram Pandita
Software flow control register bits were not defined correctly. Also clarify the IXON and IXOFF logic to reflect what userspace wants. Cc: stable@vger.kernel.org Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com> Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-06serial: omap: don't access the platform_deviceFelipe Balbi
The driver doesn't need to know about its platform_device. Everything the driver needs can be done through the struct device pointer. In case we need to use the OMAP-specific PM function pointers, those can make sure to find the device's platform_device pointer so they can find the struct omap_device through pdev->archdata field. Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-05uml: fix compile error in deliver_alarm()Miklos Szeredi
Fix the following compile error on UML. arch/um/os-Linux/time.c: In function 'deliver_alarm': arch/um/os-Linux/time.c:117:3: error: too few arguments to function 'alarm_handler' arch/um/os-Linux/internal.h:1:6: note: declared here The error was introduced by commit d3c1cfcd ("um: pass siginfo to guest process") in 3.6-rc1. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Martin Pärtel <martin.partel@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-05serial: omap: define and use to_uart_omap_port()Felipe Balbi
current code only works because struct uart_port is the first member on the uart_omap_port structure. If, for whatever reason, someone puts another member as the first of the structure, that cast won't work anymore. In order to be safe, let's use a container_of() which, for now, gets optimized into a cast anyway. Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-05serial: Add note about migration to driver SCCNXPAlexander Shiyan
This patch adds note about migration to driver SCCNXP in the code of driver SC26XX and in MIPS SNI board initialization with example. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-05xen: fix logical error in tlb flushingAlex Shi
While TLB_FLUSH_ALL gets passed as 'end' argument to flush_tlb_others(), the Xen code was made to check its 'start' parameter. That may give a incorrect op.cmd to MMUEXT_INVLPG_MULTI instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page can not be flushed from TLB. This patch fixed this issue. Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Jan Beulich <jbeulich@suse.com> Tested-by: Yongjie Ren <yongjie.ren@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-09-05Merge commit '4cb38750d49010ae72e718d46605ac9ba5a851b4' into ↵Konrad Rzeszutek Wilk
stable/for-linus-3.6 * commit '4cb38750d49010ae72e718d46605ac9ba5a851b4': (6849 commits) bcma: fix invalid PMU chip control masks [libata] pata_cmd64x: whitespace cleanup libata-acpi: fix up for acpi_pm_device_sleep_state API sata_dwc_460ex: device tree may specify dma_channel ahci, trivial: fixed coding style issues related to braces ahci_platform: add hibernation callbacks libata-eh.c: local functions should not be exposed globally libata-transport.c: local functions should not be exposed globally sata_dwc_460ex: support hardreset ata: use module_pci_driver drivers/ata/pata_pcmcia.c: adjust suspicious bit operation pata_imx: Convert to clk_prepare_enable/clk_disable_unprepare ahci: Enable SB600 64bit DMA on MSI K9AGM2 (MS-7327) v2 [libata] Prevent interface errors with Seagate FreeAgent GoFlex drivers/acpi/glue: revert accidental license-related 6b66d95895c bits libata-acpi: add missing inlines in libata.h i2c-omap: Add support for I2C_M_STOP message flag i2c: Fall back to emulated SMBus if the operation isn't supported natively i2c: Add SCCB support i2c-tiny-usb: Add support for the Robofuzz OSIF USB/I2C converter ...
2012-09-05xen/p2m: Fix one-off error in checking the P2M tree directory.Konrad Rzeszutek Wilk
We would traverse the full P2M top directory (from 0->MAX_DOMAIN_PAGES inclusive) when trying to figure out whether we can re-use some of the P2M middle leafs. Which meant that if the kernel was compiled with MAX_DOMAIN_PAGES=512 we would try to use the 512th entry. Fortunately for us the p2m_top_index has a check for this: BUG_ON(pfn >= MAX_P2M_PFN); which we hit and saw this: (XEN) domain_crash_sync called from entry.S (XEN) Domain 0 (vcpu#0) crashed on cpu#0: (XEN) ----[ Xen-4.1.2-OVM x86_64 debug=n Tainted: C ]---- (XEN) CPU: 0 (XEN) RIP: e033:[<ffffffff819cadeb>] (XEN) RFLAGS: 0000000000000212 EM: 1 CONTEXT: pv guest (XEN) rax: ffffffff81db5000 rbx: ffffffff81db4000 rcx: 0000000000000000 (XEN) rdx: 0000000000480211 rsi: 0000000000000000 rdi: ffffffff81db4000 (XEN) rbp: ffffffff81793db8 rsp: ffffffff81793d38 r8: 0000000008000000 (XEN) r9: 4000000000000000 r10: 0000000000000000 r11: ffffffff81db7000 (XEN) r12: 0000000000000ff8 r13: ffffffff81df1ff8 r14: ffffffff81db6000 (XEN) r15: 0000000000000ff8 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 0000000661795000 cr2: 0000000000000000 Fixes-Oracle-Bug: 14570662 CC: stable@vger.kernel.org # only for v3.5 Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-09-05powerpc: Don't use __put_user() in patch_instructionBenjamin Herrenschmidt
patch_instruction() can be called very early on ppc32, when the kernel isn't yet running at it's linked address. That can cause the ! is_kernel_addr() test in __put_user() to trip and call might_sleep() which is very bad at that point during boot. Use a lower level function instead for now, at least until we get to rework ppc32 boot process to do the code patching later, like ppc64 does. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Make sure IPI handlers see data written by IPI sendersPaul Mackerras
We have been observing hangs, both of KVM guest vcpu tasks and more generally, where a process that is woken doesn't properly wake up and continue to run, but instead sticks in TASK_WAKING state. This happens because the update of rq->wake_list in ttwu_queue_remote() is not ordered with the update of ipi_message in smp_muxed_ipi_message_pass(), and the reading of rq->wake_list in scheduler_ipi() is not ordered with the reading of ipi_message in smp_ipi_demux(). Thus it is possible for the IPI receiver not to see the updated rq->wake_list and therefore conclude that there is nothing for it to do. In order to make sure that anything done before smp_send_reschedule() is ordered before anything done in the resulting call to scheduler_ipi(), this adds barriers in smp_muxed_message_pass() and smp_ipi_demux(). The barrier in smp_muxed_message_pass() is a full barrier to ensure that there is a full ordering between the smp_send_reschedule() caller and scheduler_ipi(). In smp_ipi_demux(), we use xchg() rather than xchg_local() because xchg() includes release and acquire barriers. Using xchg() rather than xchg_local() makes sense given that ipi_message is not just accessed locally. This moves the barrier between setting the message and calling the cause_ipi() function into the individual cause_ipi implementations. Most of them -- those that used outb, out_8 or similar -- already had a full barrier because out_8 etc. include a sync before the MMIO store. This adds an explicit barrier in the two remaining cases. These changes made no measurable difference to the speed of IPIs as measured using a simple ping-pong latency test across two CPUs on different cores of a POWER7 machine. The analysis of the reason why processes were not waking up properly is due to Milton Miller. Cc: stable@vger.kernel.org # v3.0+ Reported-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Restore correct DSCR in context switchAnton Blanchard
During a context switch we always restore the per thread DSCR value. If we aren't doing explicit DSCR management (ie thread.dscr_inherit == 0) and the default DSCR changed while the process has been sleeping we end up with the wrong value. Check thread.dscr_inherit and select the default DSCR or per thread DSCR as required. This was found with the following test case, when running with more threads than CPUs (ie forcing context switching): http://ozlabs.org/~anton/junkcode/dscr_default_test.c With the four patches applied I can run a combination of all test cases successfully at the same time: http://ozlabs.org/~anton/junkcode/dscr_default_test.c http://ozlabs.org/~anton/junkcode/dscr_explicit_test.c http://ozlabs.org/~anton/junkcode/dscr_inherit_test.c Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> # 3.0+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Fix DSCR inheritance in copy_thread()Anton Blanchard
If the default DSCR is non zero we set thread.dscr_inherit in copy_thread() meaning the new thread and all its children will ignore future updates to the default DSCR. This is not intended and is a change in behaviour that a number of our users have hit. We just need to inherit thread.dscr and thread.dscr_inherit from the parent which ends up being much simpler. This was found with the following test case: http://ozlabs.org/~anton/junkcode/dscr_default_test.c Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> # 3.0+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Keep thread.dscr and thread.dscr_inherit in syncAnton Blanchard
When we update the DSCR either via emulation of mtspr(DSCR) or via a change to dscr_default in sysfs we don't update thread.dscr. We will eventually update it at context switch time but there is a period where thread.dscr is incorrect. If we fork at this point we will copy the old value of thread.dscr into the child. To avoid this, always keep thread.dscr in sync with reality. This issue was found with the following testcase: http://ozlabs.org/~anton/junkcode/dscr_inherit_test.c Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> # 3.0+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Update DSCR on all CPUs when writing sysfs dscr_defaultAnton Blanchard
Writing to dscr_default in sysfs doesn't actually change the DSCR - we rely on a context switch on each CPU to do the work. There is no guarantee we will get a context switch in a reasonable amount of time so fire off an IPI to force an immediate change. This issue was found with the following test case: http://ozlabs.org/~anton/junkcode/dscr_explicit_test.c Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> # 3.0+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc/powernv: Always go into nap mode when CPU is offlinePaul Mackerras
The CPU hotplug code for the powernv platform currently only puts offline CPUs into nap mode if the powersave_nap variable is set. However, HV-style KVM on this platform requires secondary CPU threads to be offline and in nap mode. Since we know nap mode works just fine on all POWER7 machines, and the only machines that support the powernv platform are POWER7 machines, this changes the code to always put offline CPUs into nap mode, regardless of powersave_nap. Powersave_nap still controls whether or not CPUs go into nap mode when idle, as before. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc: Give hypervisor decrementer interrupts their own handlerPaul Mackerras
At the moment the handler for hypervisor decrementer interrupts is the same as for decrementer interrupts, i.e. timer_interrupt(). This is bogus; if we ever do get a hypervisor decrementer interrupt it won't have anything to do with the next timer event. In fact the only time we get hypervisor decrementer interrupts is when one is left pending on exit from a KVM guest. When we get a hypervisor decrementer interrupt we don't need to do anything special to clear it, since they are edge-triggered on the transition of HDEC from 0 to -1. Thus this adds an empty handler function for them. We don't need to have them masked when interrupts are soft-disabled, so we use STD_EXCEPTION_HV instead of MASKABLE_EXCEPTION_HV. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-05powerpc/vphn: Fix arch_update_cpu_topology() return valueJesse Larrew
arch_update_cpu_topology() should only return 1 when the topology has actually changed, and should return 0 otherwise. This patch fixes a potential bug where rebuild_sched_domains() would reinitialize the sched domains even when the topology hasn't changed. Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-04ARM: gemini: fix the gemini buildLinus Walleij
Test-compiling obscure machines I notice that the gemini (which by the way lacks a defconfig) is broken since some time back. Adding a simple missing include makes it build again. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2012-09-04Merge branch 'fixes' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes Two regression fixes and one boot-loader compatibility fix from Simon Horman. * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: ARM: shmobile: armadillo800eva: enable rw rootfs mount ARM: shmobile: mackerel: fixup usb module order ARM: shmobile: armadillo800eva: fixup: sound card detection order
2012-09-03ARM: shmobile: armadillo800eva: enable rw rootfs mountKuninori Morimoto
armadillo800eva default boot loader is "hermit", and it's tag->u.core.flags has flag when kernel boots. Because of this, ${LINUX}/arch/arm/kernel/setup.c :: parse_tag_core() didn't remove MS_RDONLY flag from root_mountflags. Thus, the rootfs is mounted as "readonly". This patch adds "rw" kernel parameter, and enable read/write mounts for rootfs Cc: Masahiro Nakai <nakai@atmark-techno.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-02Merge branch 'fixes' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: ARM: shmobile: marzen: fixup smsc911x id for regulator
2012-09-02Merge branch 'fixes-for-v3.6-v2' of ↵Olof Johansson
git://git.infradead.org/users/jcooper/linux into fixes * 'fixes-for-v3.6-v2' of git://git.infradead.org/users/jcooper/linux: ARM: Kirkwood: Fix 'SZ_1M' undeclared here for db88f6281-bp-setup.c
2012-08-31Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM bugfixes from Marcelo Tosatti. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: fix KVM_GET_MSR for PV EOI kvm: Fix nonsense handling of compat ioctl
2012-08-31Merge tag 'parisc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6 Pull PARISC fixes from James Bottomley: "This is a set of two bug fixes. One is the ATOMIC problem which is now causing a compile failure in certain situations. The other is mishandling of PER_LINUX32 which may also cause user visible effects. Signed-off-by: James Bottomley <JBottomley@Parallels.com>" * tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6: [PARISC] fix personality flag check in copy_thread() [PARISC] Redefine ATOMIC_INIT and ATOMIC64_INIT to drop the casts