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2013-02-01x86-32, mm: Remove reference to resume_map_numa_kva()H. Peter Anvin2-8/+0
Remove reference to removed function resume_map_numa_kva(). Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20130131005616.1C79F411@kernel.stglabs.ibm.com
2013-02-01x86-32, mm: Rip out x86_32 NUMA remapping codeDave Hansen4-174/+0
This code was an optimization for 32-bit NUMA systems. It has probably been the cause of a number of subtle bugs over the years, although the conditions to excite them would have been hard to trigger. Essentially, we remap part of the kernel linear mapping area, and then sometimes part of that area gets freed back in to the bootmem allocator. If those pages get used by kernel data structures (say mem_map[] or a dentry), there's no big deal. But, if anyone ever tried to use the linear mapping for these pages _and_ cared about their physical address, bad things happen. For instance, say you passed __GFP_ZERO to the page allocator and then happened to get handed one of these pages, it zero the remapped page, but it would make a pte to the _old_ page. There are probably a hundred other ways that it could screw with things. We don't need to hang on to performance optimizations for these old boxes any more. All my 32-bit NUMA systems are long dead and buried, and I probably had access to more than most people. This code is causing real things to break today: https://lkml.org/lkml/2013/1/9/376 I looked in to actually fixing this, but it requires surgery to way too much brittle code, as well as stuff like per_cpu_ptr_to_phys(). [ hpa: Cc: this for -stable, since it is a memory corruption issue. However, an alternative is to simply mark NUMA as depends BROKEN rather than EXPERIMENTAL in the X86_32 subclause... ] Link: http://lkml.kernel.org/r/20130131005616.1C79F411@kernel.stglabs.ibm.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org>
2013-01-31x86/numa: Use __pa_nodebug() insteadBorislav Petkov1-1/+1
... and fix the following warning: arch/x86/mm/numa.c: In function ‘setup_node_data’: arch/x86/mm/numa.c:222:3: warning: passing argument 1 of ‘__phys_addr_nodebug’ makes integer from pointer without a cast Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1359245901-8512-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-01-26x86, kvm: Fix kvm's use of __pa() on percpu areasDave Hansen2-6/+7
In short, it is illegal to call __pa() on an address holding a percpu variable. This replaces those __pa() calls with slow_virt_to_phys(). All of the cases in this patch are in boot time (or CPU hotplug time at worst) code, so the slow pagetable walking in slow_virt_to_phys() is not expected to have a performance impact. The times when this actually matters are pretty obscure (certain 32-bit NUMA systems), but it _does_ happen. It is important to keep KVM guests working on these systems because the real hardware is getting harder and harder to find. This bug manifested first by me seeing a plain hang at boot after this message: CPU 0 irqstacks, hard=f3018000 soft=f301a000 or, sometimes, it would actually make it out to the console: [ 0.000000] BUG: unable to handle kernel paging request at ffffffff I eventually traced it down to the KVM async pagefault code. This can be worked around by disabling that code either at compile-time, or on the kernel command-line. The kvm async pagefault code was injecting page faults in to the guest which the guest misinterpreted because its "reason" was not being properly sent from the host. The guest passes a physical address of an per-cpu async page fault structure via an MSR to the host. Since __pa() is broken on percpu data, the physical address it sent was bascially bogus and the host went scribbling on random data. The guest never saw the real reason for the page fault (it was injected by the host), assumed that the kernel had taken a _real_ page fault, and panic()'d. The behavior varied, though, depending on what got corrupted by the bad write. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20130122212435.4905663F@kernel.stglabs.ibm.com Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26x86, mm: Create slow_virt_to_phys()Dave Hansen2-0/+32
This is necessary because __pa() does not work on some kinds of memory, like vmalloc() or the alloc_remap() areas on 32-bit NUMA systems. We have some functions to do conversions _like_ this in the vmalloc() code (like vmalloc_to_page()), but they do not work on sizes other than 4k pages. We would potentially need to be able to handle all the page sizes that we use for the kernel linear mapping (4k, 2M, 1G). In practice, on 32-bit NUMA systems, the percpu areas get stuck in the alloc_remap() area. Any __pa() call on them will break and basically return garbage. This patch introduces a new function slow_virt_to_phys(), which walks the kernel page tables on x86 and should do precisely the same logical thing as __pa(), but actually work on a wider range of memory. It should work on the normal linear mapping, vmalloc(), kmap(), etc... Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20130122212433.4D1FCA62@kernel.stglabs.ibm.com Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26x86, mm: Use new pagetable helpers in try_preserve_large_page()Dave Hansen1-7/+4
try_preserve_large_page() can be slightly simplified by using the new page_level_*() helpers. This also moves the 'level' over to the new pg_level enum type. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20130122212432.14F3D993@kernel.stglabs.ibm.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26x86, mm: Pagetable level size/shift/mask helpersDave Hansen2-1/+15
I plan to use lookup_address() to walk the kernel pagetables in a later patch. It returns a "pte" and the level in the pagetables where the "pte" was found. The level is just an enum and needs to be converted to a useful value in order to do address calculations with it. These helpers will be used in at least two places. This also gives the anonymous enum a real name so that no one gets confused about what they should be passing in to these helpers. "PTE_SHIFT" was chosen for naming consistency with the other pagetable levels (PGD/PUD/PMD_SHIFT). Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20130122212431.405D3A8C@kernel.stglabs.ibm.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26x86, mm: Make DEBUG_VIRTUAL work earlier in bootDave Hansen3-4/+11
The KVM code has some repeated bugs in it around use of __pa() on per-cpu data. Those data are not in an area on which using __pa() is valid. However, they are also called early enough in boot that __vmalloc_start_set is not set, and thus the CONFIG_DEBUG_VIRTUAL debugging does not catch them. This adds a check to also verify __pa() calls against max_low_pfn, which we can use earler in boot than is_vmalloc_addr(). However, if we are super-early in boot, max_low_pfn=0 and this will trip on every call, so also make sure that max_low_pfn is set before we try to use it. With this patch applied, CONFIG_DEBUG_VIRTUAL will actually catch the bug I was chasing (and fix later in this series). I'd love to find a generic way so that any __pa() call on percpu areas could do a BUG_ON(), but there don't appear to be any nice and easy ways to check if an address is a percpu one. Anybody have ideas on a way to do this? Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20130122212430.F46F8159@kernel.stglabs.ibm.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26Merge tag 'v3.8-rc5' into x86/mmH. Peter Anvin3183-69416/+89628
The __pa() fixup series that follows touches KVM code that is not present in the existing branch based on v3.7-rc5, so merge in the current upstream from Linus. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-26Merge branch 'x86/mm' of ↵H. Peter Anvin3-3/+8
ssh://ra.kernel.org/pub/scm/linux/kernel/git/tip/tip into x86/mm Add missing patch from the __pa_symbol conversion series by Alexander Duyck. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-25Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+2
Pull kvm fixlet from Marcelo Tosatti. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: PPC: Emulate dcbf
2013-01-25Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds6-27/+26
Pull ARM fixes from Russell King: "A number of fixes: Patrik found a problem with preempt counting in the VFP assembly functions which can cause the preempt count to be upset. Nicolas fixed a problem with the parsing of the DT when it straddles a 1MB boundary. Subhash Jadavani reported a problem with sparsemem and our highmem support for cache maintanence for DMA areas, and TI found a bug in their strongly ordered memory mapping type. Also, three fixes by way of Will Deacon's tree from Dave Martin for instruction compatibility and Marc Zyngier to fix hypervisor boot mode issues." * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: 7629/1: mm: Fix missing XN flag for for MT_MEMORY_SO ARM: DMA: Fix struct page iterator in dma_cache_maint() to work with sparsemem ARM: 7628/1: head.S: map one extra section for the ATAG/DTB area ARM: 7627/1: Predicate preempt logic on PREEMP_COUNT not PREEMPT alone ARM: virt: simplify __hyp_stub_install epilog ARM: virt: boot secondary CPUs through the right entry point ARM: virt: Avoid bx instruction for compatibility with <=ARMv4
2013-01-25Merge tag 'fixes-for-linus2' of ↵Linus Torvalds40-180/+176
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "Here's a long-pending fixes pull request for arm-soc (I didn't send one in the -rc4 cycle). The larger deltas are from: - A fixup of error paths in the mvsdio driver - Header file move for a driver that hadn't been properly converted to multiplatform on i.MX, which was causing build failures when included - Device tree updates for at91 dealing mostly with their new pinctrl setup merged in 3.8 and mistakes in those initial configs The rest are the normal mix of small fixes all over the place; sunxi, omap, imx, mvebu, etc, etc." * tag 'fixes-for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (40 commits) mfd: vexpress-sysreg: Don't skip initialization on probe ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree ARM: vexpress: extend the MPIDR range used for pen release check ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig ARM: at91/at91_dt_defconfig: remove memory specification to cmdline ARM: at91/dts: add macb mii pinctrl config for kizbox ARM: at91: rm9200: remake the BGA as default version ARM: at91: fix gpios on i2c-gpio for RM9200 DT ARM: at91/at91sam9x5 DTS: add SCK USART pins ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts ARM: at91/at91-pinctrl documentation: fix typo and add some details ARM: kirkwood: fix missing #interrupt-cells property mmc: mvsdio: use devm_ API to simplify/correct error paths. clk: mvebu/clk-cpu.c: fix memory leakage ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport ARM: OMAP2+: DT node Timer iteration fix ARM: OMAP2+: Fix section warning for omap_init_ocp2scp() ARM: OMAP2+: fix build break for omapdrm ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function calls ...
2013-01-24Merge branch 'vexpress/fixes' of git://git.linaro.org/people/pawelmoll/linux ↵Olof Johansson2-3/+1
into fixes From Pawel Moll: - makes the V2P-CA15_A7 (a.k.a. TC2) work with 3.8 kernels - improves vexpress-sysreg.c behaviour on arm64 platforms * 'vexpress/fixes' of git://git.linaro.org/people/pawelmoll/linux: mfd: vexpress-sysreg: Don't skip initialization on probe ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree ARM: vexpress: extend the MPIDR range used for pen release check
2013-01-24Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixesOlof Johansson5-23/+48
From Nicolas Ferre: Here are fixes for AT91 that are mainly related to device tree. One RM9200 setup option is the only C code change. Some documentation changes can clarify the pinctrl use. Then, some defconfig modifications are allowing the affected platforms to boot. * tag 'at91-fixes' of git://github.com/at91linux/linux-at91: ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig ARM: at91/at91_dt_defconfig: remove memory specification to cmdline ARM: at91/dts: add macb mii pinctrl config for kizbox ARM: at91: rm9200: remake the BGA as default version ARM: at91: fix gpios on i2c-gpio for RM9200 DT ARM: at91/at91sam9x5 DTS: add SCK USART pins ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts ARM: at91/at91-pinctrl documentation: fix typo and add some details
2013-01-24ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device TreePawel Moll1-2/+0
As the kernel is able to cope with multiple clusters, uncomment the A7 cores in the Device Tree for V2P-CA15_A7 tile, making all 5 cores available to the user. Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2013-01-24ARM: vexpress: extend the MPIDR range used for pen release checkLorenzo Pieralisi1-1/+1
In ARM multi-cluster systems the MPIDR affinity level 0 cannot be used as a single cpu identifier, affinity levels 1 and 2 must be taken into account as well. This patch extends the MPIDR usage to affinity levels 1 and 2 in versatile secondary cores start up code in order to compare the passed pen_release value with the full-blown affinity mask. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Liviu Dudau <liviu.dudau@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2013-01-24Merge tag 'mvebu_fixes_for_v3.8-rc5' of ↵Olof Johansson1-0/+2
git://git.infradead.org/users/jcooper/linux into fixes From Jason Cooper: mvebu fixes for v3.8-rc5 - fix memory leak in mvebu/clk-cpu.c - use devm_ to correct/simplify error paths in mvsdio - add missing #interrupt-cells property in kirkwood * tag 'mvebu_fixes_for_v3.8-rc5' of git://git.infradead.org/users/jcooper/linux: ARM: kirkwood: fix missing #interrupt-cells property mmc: mvsdio: use devm_ API to simplify/correct error paths. clk: mvebu/clk-cpu.c: fix memory leakage
2013-01-24Merge tag 'usb-3.8-rc4' of ↵Linus Torvalds7-22/+24
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull more USB fixes from Greg Kroah-Hartman: "Here are some more USB fixes for the 3.8-rc4 tree. Some gadget driver fixes, and finally resolved the ehci-mxc driver build issues (it's just some code moving around and being deleted)." * tag 'usb-3.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: USB: EHCI: fix build error in ehci-mxc USB: EHCI: add a name for the platform-private field USB: EHCI: fix incorrect configuration test USB: EHCI: Move definition of EHCI_STATS to ehci.h USB: UHCI: fix IRQ race during initialization usb: gadget: FunctionFS: Fix missing braces in parse_opts usb: dwc3: gadget: fix ep->maxburst for ep0 ARM: i.MX clock: Change the connection-id for fsl-usb2-udc usb: gadget: fsl_mxc_udc: replace MX35_IO_ADDRESS to ioremap usb: gadget: fsl-mxc-udc: replace cpu_is_xxx() with platform_device_id usb: musb: cppi_dma: drop '__init' annotation
2013-01-24Merge branch 'for-linus' of ↵Linus Torvalds4-1/+19
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k fixes from Geert Uytterhoeven: "The asm-generic changeset has been ack'ed by Arnd." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Wire up finit_module asm-generic/dma-mapping-broken.h: Provide dma_alloc_attrs()/dma_free_attrs() m68k: Provide dma_alloc_attrs()/dma_free_attrs()
2013-01-24Merge tag 'arm64-fixes' of ↵Linus Torvalds1-1/+4
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull arm64 fixes from Catalin Marinas: - ELF coredump fix (more registers dumped than what user space expects) - SUBARCH name generation (s/aarch64/arm64/) * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: arm64: makefile: fix uname munging when setting ARCH on native machine arm64: elf: fix core dumping to match what glibc expects
2013-01-23ARM: at91/dts: correct comment in at91sam9x5.dtsi for miiDouglas Gilbert1-8/+8
Concerning pinctrl_macb0_rmii_mii, values were okay, but not comments. Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfigNicolas Ferre1-0/+1
Reported-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91/at91_dt_defconfig: remove memory specification to cmdlineNicolas Ferre1-1/+1
No need for this cmdline option as we are using DT. Moreover this defconfig is targeted to multiple SoC/boards: this option was nonsense. Reported-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91/dts: add macb mii pinctrl config for kizboxBoris BREZILLON1-0/+2
This patch overrides default macb pinctrl config defined in at91sam9260.dtsi (pinctrl_macb_rmii) with kizbox board config (pinctrl_macb_rmii + pinctrl_macb_rmii_mii_alt). Signed-off-by: Boris BREZILLON <linux-arm@overkiz.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91: rm9200: remake the BGA as default versionJean-Christophe PLAGNIOL-VILLARD1-0/+2
Make BGA as the default version as we are supposed to just have to specify when we use the PQFP version. Issue was existing since commit: 3e90772 (ARM: at91: fix at91rm9200 soc subtype handling). Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: stable <stable@vger.kernel.org> [v3.3] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91: fix gpios on i2c-gpio for RM9200 DTJoachim Eastwood1-2/+2
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91/at91sam9x5 DTS: add SCK USART pinsRichard Genoud1-0/+20
The SCK pins where missing in usarts pinctrl. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)artsRichard Genoud1-12/+12
The PIN_BANK 3 is for PDxx pins, not PCxx pins. And PIN_BANK 1 is for PBxx, not PIN_BANK 0. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23ARM: kirkwood: fix missing #interrupt-cells propertySebastian Hesselbarth1-0/+2
The gpio controller on kirkwood can provide interrupts but is missing the #interrupt-cells property. This patch just adds it to both gpio controllers. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-23Merge tag 'perf-urgent-for-mingo' of ↵Linus Torvalds1-6/+0
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf/urgent fixes from Arnaldo Carvalho de Melo: . revert 20b279 - require exclude_guest to use PEBS - kernel side, now older binaries will continue working for things like cycles:pp without needing to pass extra modifiers, from David Ahern. . Fix building from 'make perf-*-src-pkg' tarballs, broken by UAPI, from Sebastian Andrzej Siewior [ Pulling directly, Ingo would normally pull but has been unresponsive ] * tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: perf tools: Fix building from 'make perf-*-src-pkg' tarballs perf x86: revert 20b279 - require exclude_guest to use PEBS - kernel side
2013-01-23Merge branch 'for-linus' of ↵Linus Torvalds5-15/+26
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fixes from Helge Deller: "Improve the stability of the linux kernel on the parisc architecture" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: sigaltstack doesn't round ss.ss_sp as required parisc: improve ptrace support for gdb single-step parisc: don't claim cpu irqs more than once parisc: avoid undefined shift in cnv_float.h
2013-01-22Merge tag 'omap-for-v3.8-rc4/fixes-signed' of ↵Olof Johansson68-214/+562
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes From Tony Lindgren: Minimal omap fixes for the -rc series: - A build fix for recently merged omap DRM changes - Regression fixes from the common clock framework conversion for omap4 audio and omap2 reboot - Regression fix for pandaboard WLAN control UART muxing caused by u-boot only muxing essential pins nowadays - Timer iteration fix for CONFIG_OF_DYNAMIC - A section mismatch fix for ocp2scp init * tag 'omap-for-v3.8-rc4/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (306 commits) ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport ARM: OMAP2+: DT node Timer iteration fix ARM: OMAP2+: Fix section warning for omap_init_ocp2scp() ARM: OMAP2+: fix build break for omapdrm ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function calls ARM: OMAP4: hwmod_data: Correct IDLEMODE for McPDM ARM: OMAP4: clock data: Lock ABE DPLL on all revisions + Linux 3.8-rc4 Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-22ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILLOleg Nesterov1-4/+5
putreg() assumes that the tracee is not running and pt_regs_access() can safely play with its stack. However a killed tracee can return from ptrace_stop() to the low-level asm code and do RESTORE_REST, this means that debugger can actually read/modify the kernel stack until the tracee does SAVE_REST again. set_task_blockstep() can race with SIGKILL too and in some sense this race is even worse, the very fact the tracee can be woken up breaks the logic. As Linus suggested we can clear TASK_WAKEKILL around the arch_ptrace() call, this ensures that nobody can ever wakeup the tracee while the debugger looks at it. Not only this fixes the mentioned problems, we can do some cleanups/simplifications in arch_ptrace() paths. Probably ptrace_unfreeze_traced() needs more callers, for example it makes sense to make the tracee killable for oom-killer before access_process_vm(). While at it, add the comment into may_ptrace_stop() to explain why ptrace_stop() still can't rely on SIGKILL and signal_pending_state(). Reported-by: Salman Qazi <sqazi@google.com> Reported-by: Suleiman Souhlal <suleiman@google.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-22arm64: elf: fix core dumping to match what glibc expectsWill Deacon1-1/+4
The kernel's internal definition of ELF_NGREG uses struct pt_regs, which means that we disagree with userspace on the size of coredumps since glibc correctly uses the user-visible struct user_pt_regs. This patch fixes our ELF_NGREG definition to use struct user_pt_regs and introduces our own ELF_CORE_COPY_REGS to convert between the user and kernel structure definitions. Cc: <stable@vger.kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-22Merge tag 'imx-fixes-rc' of git://git.pengutronix.de/git/imx/linux-2.6 into ↵Olof Johansson2-43/+1
fixes From Sascha Hauer: ARM i.MX fixes for -rc. This contains a single compilation fix for the CODA driver. * tag 'imx-fixes-rc' of git://git.pengutronix.de/git/imx/linux-2.6: [media] coda: Fix build due to iram.h rename
2013-01-21ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transportLuciano Coelho1-0/+6
Add the UART2 muxing data to the board file (this used to be, erroneously, done in the bootloader). Cc: stable <stable@vger.kernel.org> [3.7] Signed-off-by: Luciano Coelho <coelho@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-21ARM: OMAP2+: DT node Timer iteration fixPantelis Antoniou1-6/+2
The iterator correctly handles of_node_put() calls. Remove it before continue'ing the loop. Without this patch you get the following with CONFIG_OF_DYNAMIC set: ERROR: Bad of_node_put() on /ocp/timer@44e31000! [<c001329c>] (unwind_backtrace+0x0/0xe0) from [<c03dd8f0>] (of_node_release+0x2c/0xa0)! [<c03dd8f0>] (of_node_release+0x2c/0xa0) from [<c03ddea0>] (of_find_matching_node_and_match+0x78/0x90)! [<c03ddea0>] (of_find_matching_node_and_match+0x78/0x90) from [<c06d349c>] (omap_get_timer_dt+0x78/0x90)! [<c06d349c>] (omap_get_timer_dt+0x78/0x90) from [<c06d3664>] (omap_dm_timer_init_one.clone.2+0x34/0x2bc)! [<c06d3664>] (omap_dm_timer_init_one.clone.2+0x34/0x2bc) from [<c06d3a2c>] (omap2_gptimer_clocksource_init.clone.4+0x24/0xa8)! [<c06d3a2c>] (omap2_gptimer_clocksource_init.clone.4+0x24/0xa8) from [<c06cca58>] (time_init+0x20/0x30)! [<c06cca58>] (time_init+0x20/0x30) from [<c06c9690>] (start_kernel+0x1a8/0x2fc)! Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> Acked-by: Jon Hunter <jon-hunter@ti.com> [tony@atomide.com: updated description per Jon] Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-21ARM: OMAP2+: Fix section warning for omap_init_ocp2scp()Tony Lindgren1-1/+1
Otherwise we will get: WARNING: vmlinux.o(.text+0x1d4f0): Section mismatch in reference from the function omap_init_ocp2scp() to the function .init.text:omap_device_build() The function omap_init_ocp2scp() references the function __init omap_device_build(). This is often because omap_init_ocp2scp lacks a __init annotation or the annotation of omap_device_build is wrong. Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-21ARM: OMAP2+: fix build break for omapdrmRob Clark1-1/+2
Fixes compile break with 3.8-rc4. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-21ia64: kill thread_matches(), unexport ptrace_check_attach()Oleg Nesterov1-27/+0
The ia64 function "thread_matches()" has no users since commit e868a55c2a8c ("[IA64] remove find_thread_for_addr()"). Remove it. This allows us to make ptrace_check_attach() static to kernel/ptrace.c, which is good since we'll need to change the semantics of it and fix up all the callers. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-19Merge branch 'for-rmk/virt/hyp-boot/fixes' of ↵Russell King305-1068/+1129
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into fixes
2013-01-19ARM: 7629/1: mm: Fix missing XN flag for for MT_MEMORY_SOSantosh Shilimkar1-1/+1
Commit 8fb54284ba6a {ARM: mm: Add strongly ordered descriptor support} added XN flag at section level but missed it at PTE level. Fix it by adding the L_PTE_XN to MT_MEMORY_SO PTE descriptor. Reported-by: Richard Woodruff <r-woodruff2@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-19ARM: DMA: Fix struct page iterator in dma_cache_maint() to work with sparsememRussell King1-8/+10
Subhash Jadavani reported this partial backtrace: Now consider this call stack from MMC block driver (this is on the ARMv7 based board): [<c001b50c>] (v7_dma_inv_range+0x30/0x48) from [<c0017b8c>] (dma_cache_maint_page+0x1c4/0x24c) [<c0017b8c>] (dma_cache_maint_page+0x1c4/0x24c) from [<c0017c28>] (___dma_page_cpu_to_dev+0x14/0x1c) [<c0017c28>] (___dma_page_cpu_to_dev+0x14/0x1c) from [<c0017ff8>] (dma_map_sg+0x3c/0x114) This is caused by incrementing the struct page pointer, and running off the end of the sparsemem page array. Fix this by incrementing by pfn instead, and convert the pfn to a struct page. Cc: <stable@vger.kernel.org> Suggested-by: James Bottomley <JBottomley@Parallels.com> Tested-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-19ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function callsJon Hunter2-0/+4
During the migration to the common clock framework, calls to the functions omap2xxx_clkt_vps_late_init() were not preserved for OMAP2420 and OMAP2430. This causes the variables "sys_ck_rate" and "curr_prcm_set" to be uninitialised on boot. On reboot, this causes the following error message to be displayed because the appropriate MPU clock frequency (derived from sys_ck_rate) cannot be found. "Could not set MPU rate to 4294MHz" Fix this by adding back calls to omap2xxx_clkt_vps_late_init() in the OMAP2420 and OMAP2430 clock initialisation code. Signed-off-by: Jon Hunter <jon-hunter@ti.com> [paul@pwsan.com: dropped the duplicated call to omap2xxx_clkt_vps_check_bootloader_rates() after consultation with Jon; updated patch description] Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-01-19ARM: OMAP4: hwmod_data: Correct IDLEMODE for McPDMPeter Ujfalusi1-1/+5
McPDM need to be configured to NO_IDLE mode when it is in used otherwise vital clocks will be gated which results 'slow motion' audio playback. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> [paul@pwsan.com: copy patch description into hwmod data comments] Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-01-19ARM: OMAP4: clock data: Lock ABE DPLL on all revisionsPeter Ujfalusi1-7/+6
To avoid issues with audio caused by non locked ABE DPLL we should make sure it is locked in all OMAP4 revisions. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Jon Hunter <jon-hunter@ti.com> [paul@pwsan.com: cleaned up patch description] Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-01-19Merge tag 'stable/for-linus-3.8-rc3-tag' of ↵Linus Torvalds2-8/+0
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen fixes from Konrad Rzeszutek Wilk: - CVE-2013-0190/XSA-40 (or stack corruption for 32-bit PV kernels) - Fix racy vma access spotted by Al Viro - Fix mmap batch ioctl potentially resulting in large O(n) page allcations. - Fix vcpu online/offline BUG:scheduling while atomic.. - Fix unbound buffer scanning for more than 32 vCPUs. - Fix grant table being incorrectly initialized - Fix incorrect check in pciback - Allow privcmd in backend domains. Fix up whitespace conflict due to ugly merge resolution in Xen tree in arch/arm/xen/enlighten.c * tag 'stable/for-linus-3.8-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: Fix stack corruption in xen_failsafe_callback for 32bit PVOPS guests. Revert "xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic." xen/gntdev: remove erronous use of copy_to_user xen/gntdev: correctly unmap unlinked maps in mmu notifier xen/gntdev: fix unsafe vma access xen/privcmd: Fix mmap batch ioctl. Xen: properly bound buffer access when parsing cpu/*/availability xen/grant-table: correctly initialize grant table version 1 x86/xen : Fix the wrong check in pciback xen/privcmd: Relax access control in privcmd_ioctl_mmap
2013-01-18Merge branch 'for-linus' of ↵Linus Torvalds2-3/+7
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu arch fixes from Greg Ungerer: "This contains a couple of fixes, both affecting compilation of non-mmu m68k targets." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: fix conditional use of init_pointer_table m68knommu: add KMAP definitions for non-MMU definitions
2013-01-18ARM: i.MX clock: Change the connection-id for fsl-usb2-udcPeter Chen5-15/+15
As we use platform_device_id for fsl-usb2-udc driver, it needs to change clk connection-id, or the related devm_clk_get will be failed. Signed-off-by: Peter Chen <peter.chen@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
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