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2014-10-19Merge git://git.infradead.org/users/eparis/auditLinus Torvalds
Pull audit updates from Eric Paris: "So this change across a whole bunch of arches really solves one basic problem. We want to audit when seccomp is killing a process. seccomp hooks in before the audit syscall entry code. audit_syscall_entry took as an argument the arch of the given syscall. Since the arch is part of what makes a syscall number meaningful it's an important part of the record, but it isn't available when seccomp shoots the syscall... For most arch's we have a better way to get the arch (syscall_get_arch) So the solution was two fold: Implement syscall_get_arch() everywhere there is audit which didn't have it. Use syscall_get_arch() in the seccomp audit code. Having syscall_get_arch() everywhere meant it was a useless flag on the stack and we could get rid of it for the typical syscall entry. The other changes inside the audit system aren't grand, fixed some records that had invalid spaces. Better locking around the task comm field. Removing some dead functions and structs. Make some things static. Really minor stuff" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: rename audit_log_remove_rule to disambiguate for trees audit: cull redundancy in audit_rule_change audit: WARN if audit_rule_change called illegally audit: put rule existence check in canonical order next: openrisc: Fix build audit: get comm using lock to avoid race in string printing audit: remove open_arg() function that is never used audit: correct AUDIT_GET_FEATURE return message type audit: set nlmsg_len for multicast messages. audit: use union for audit_field values since they are mutually exclusive audit: invalid op= values for rules audit: use atomic_t to simplify audit_serial() kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0] audit: reduce scope of audit_log_fcaps audit: reduce scope of audit_net_id audit: arm64: Remove the audit arch argument to audit_syscall_entry arm64: audit: Add audit hook in syscall_trace_enter/exit() audit: x86: drop arch from __audit_syscall_entry() interface sparc: implement is_32bit_task sparc: properly conditionalize use of TIF_32BIT ...
2014-10-18Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS updates from Ralf Baechle: "This is the MIPS pull request for the next kernel: - Zubair's patch series adds CMA support for MIPS. Doing so it also touches ARM64 and x86. - remove the last instance of IRQF_DISABLED from arch/mips - updates to two of the MIPS defconfig files. - cleanup of how cache coherency bits are handled on MIPS and implement support for write-combining. - platform upgrades for Alchemy - move MIPS DTS files to arch/mips/boot/dts/" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (24 commits) MIPS: ralink: remove deprecated IRQF_DISABLED MIPS: pgtable.h: Implement the pgprot_writecombine function for MIPS MIPS: cpu-probe: Set the write-combine CCA value on per core basis MIPS: pgtable-bits: Define the CCA bit for WC writes on Ingenic cores MIPS: pgtable-bits: Move the CCA bits out of the core's ifdef blocks MIPS: DMA: Add cma support x86: use generic dma-contiguous.h arm64: use generic dma-contiguous.h asm-generic: Add dma-contiguous.h MIPS: BPF: Add new emit_long_instr macro MIPS: ralink: Move device-trees to arch/mips/boot/dts/ MIPS: Netlogic: Move device-trees to arch/mips/boot/dts/ MIPS: sead3: Move device-trees to arch/mips/boot/dts/ MIPS: Lantiq: Move device-trees to arch/mips/boot/dts/ MIPS: Octeon: Move device-trees to arch/mips/boot/dts/ MIPS: Add support for building device-tree binaries MIPS: Create common infrastructure for building built-in device-trees MIPS: SEAD3: Enable DEVTMPFS MIPS: SEAD3: Regenerate defconfigs MIPS: Alchemy: DB1300: Add touch penirq support ...
2014-10-15Merge tag 'clk-for-linus-3.18' of ↵Linus Torvalds
git://git.linaro.org/people/mike.turquette/linux Pull clock tree updates from Mike Turquette: "The clk tree changes for 3.18 are dominated by clock drivers. Mostly fixes and enhancements to existing drivers as well as new drivers. This tag contains a bit more arch code than I usually take due to some OMAP2+ changes. Additionally it contains the restart notifier handlers which are merged as a dependency into several trees. The PXA changes are the only messy part. Due to having a stable tree I had to revert one patch and follow up with one more fix near the tip of this tag. Some dead code is introduced but it will soon become live code after 3.18-rc1 is released as the rest of the PXA family is converted over to the common clock framework. Another trend in this tag is that multiple vendors have started to push the complexity of changing their CPU frequency into the clock driver, whereas this used to be done in CPUfreq drivers. Changes to the clk core include a generic gpio-clock type and a clk_set_phase() function added to the top-level clk.h api. Due to some confusion on the fbdev mailing list the kernel boot parameters documentation was updated to further explain the clk_ignore_unused parameter, which is often required by users of the simplefb driver. Finally some fixes to the locking around the clock debugfs stuff was done to prevent deadlocks when interacting with other subsystems." * tag 'clk-for-linus-3.18' of git://git.linaro.org/people/mike.turquette/linux: (99 commits) clk: pxa clocks build system fix Revert "arm: pxa: Transition pxa27x to clk framework" clk: samsung: register restart handlers for s3c2412 and s3c2443 clk: rockchip: add restart handler clk: rockchip: rk3288: i2s_frac adds flag to set parent's rate doc/kernel-parameters.txt: clarify clk_ignore_unused arm: pxa: Transition pxa27x to clk framework dts: add devicetree bindings for pxa27x clocks clk: add pxa27x clock drivers arm: pxa: add clock pll selection bits clk: dts: document pxa clock binding clk: add pxa clocks infrastructure clk: gpio-gate: Ensure gpiod_ APIs are prototyped clk: ti: dra7-atl-clock: Mark the device as pm_runtime_irq_safe clk: ti: LLVMLinux: Move __init outside of type definition clk: ti: consider the fact that of_clk_get() might return an error clk: ti: dra7-atl-clock: fix a memory leak clk: ti: change clock init to use generic of_clk_init clk: hix5hd2: add I2C clocks clk: hix5hd2: add watchdog0 clocks ...
2014-10-14mm: softdirty: enable write notifications on VMAs after VM_SOFTDIRTY clearedPeter Feiner
For VMAs that don't want write notifications, PTEs created for read faults have their write bit set. If the read fault happens after VM_SOFTDIRTY is cleared, then the PTE's softdirty bit will remain clear after subsequent writes. Here's a simple code snippet to demonstrate the bug: char* m = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, -1, 0); system("echo 4 > /proc/$PPID/clear_refs"); /* clear VM_SOFTDIRTY */ assert(*m == '\0'); /* new PTE allows write access */ assert(!soft_dirty(x)); *m = 'x'; /* should dirty the page */ assert(soft_dirty(x)); /* fails */ With this patch, write notifications are enabled when VM_SOFTDIRTY is cleared. Furthermore, to avoid unnecessary faults, write notifications are disabled when VM_SOFTDIRTY is set. As a side effect of enabling and disabling write notifications with care, this patch fixes a bug in mprotect where vm_page_prot bits set by drivers were zapped on mprotect. An analogous bug was fixed in mmap by commit c9d0bf241451 ("mm: uncached vma support with writenotify"). Signed-off-by: Peter Feiner <pfeiner@google.com> Reported-by: Peter Feiner <pfeiner@google.com> Suggested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Jamie Liu <jamieliu@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-13Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler updates from Ingo Molnar: "The main changes in this cycle were: - Optimized support for Intel "Cluster-on-Die" (CoD) topologies (Dave Hansen) - Various sched/idle refinements for better idle handling (Nicolas Pitre, Daniel Lezcano, Chuansheng Liu, Vincent Guittot) - sched/numa updates and optimizations (Rik van Riel) - sysbench speedup (Vincent Guittot) - capacity calculation cleanups/refactoring (Vincent Guittot) - Various cleanups to thread group iteration (Oleg Nesterov) - Double-rq-lock removal optimization and various refactorings (Kirill Tkhai) - various sched/deadline fixes ... and lots of other changes" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (72 commits) sched/dl: Use dl_bw_of() under rcu_read_lock_sched() sched/fair: Delete resched_cpu() from idle_balance() sched, time: Fix build error with 64 bit cputime_t on 32 bit systems sched: Improve sysbench performance by fixing spurious active migration sched/x86: Fix up typo in topology detection x86, sched: Add new topology for multi-NUMA-node CPUs sched/rt: Use resched_curr() in task_tick_rt() sched: Use rq->rd in sched_setaffinity() under RCU read lock sched: cleanup: Rename 'out_unlock' to 'out_free_new_mask' sched: Use dl_bw_of() under RCU read lock sched/fair: Remove duplicate code from can_migrate_task() sched, mips, ia64: Remove __ARCH_WANT_UNLOCKED_CTXSW sched: print_rq(): Don't use tasklist_lock sched: normalize_rt_tasks(): Don't use _irqsave for tasklist_lock, use task_rq_lock() sched: Fix the task-group check in tg_has_rt_tasks() sched/fair: Leverage the idle state info when choosing the "idlest" cpu sched: Let the scheduler see CPU idle states sched/deadline: Fix inter- exclusive cpusets migrations sched/deadline: Clear dl_entity params when setscheduling to different class sched/numa: Kill the wrong/dead TASK_DEAD check in task_numa_fault() ...
2014-10-13Merge branch 'locking-arch-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull arch atomic cleanups from Ingo Molnar: "This is a series kept separate from the main locking tree, which cleans up and improves various details in the atomics type handling: - Remove the unused atomic_or_long() method - Consolidate and compress atomic ops implementations between architectures, to reduce linecount and to make it easier to add new ops. - Rewrite generic atomic support to only require cmpxchg() from an architecture - generate all other methods from that" * 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read() locking, mips: Fix atomics locking, sparc64: Fix atomics locking,arch: Rewrite generic atomic support locking,arch,xtensa: Fold atomic_ops locking,arch,sparc: Fold atomic_ops locking,arch,sh: Fold atomic_ops locking,arch,powerpc: Fold atomic_ops locking,arch,parisc: Fold atomic_ops locking,arch,mn10300: Fold atomic_ops locking,arch,mips: Fold atomic_ops locking,arch,metag: Fold atomic_ops locking,arch,m68k: Fold atomic_ops locking,arch,m32r: Fold atomic_ops locking,arch,ia64: Fold atomic_ops locking,arch,hexagon: Fold atomic_ops locking,arch,cris: Fold atomic_ops locking,arch,avr32: Fold atomic_ops locking,arch,arm64: Fold atomic_ops locking,arch,arm: Fold atomic_ops ...
2014-10-10Merge branch 'for-v3.18' of ↵Linus Torvalds
git://git.linaro.org/people/mszyprowski/linux-dma-mapping Pull dma-mapping update from Marek Szyprowski: "Provide the dma write coherent api (available previously on ARM architecture) for all other architectures, which use dma_ops-based dma mapping implementation. This lets one to use the same code in the device drivers regardless of the selected architecture" * 'for-v3.18' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: dma-mapping: Provide write-combine allocations s390: Implement dma_{alloc,free}_attrs()
2014-10-09Merge branch 'akpm' (fixes from Andrew Morton)Linus Torvalds
Merge patch-bomb from Andrew Morton: - part of OCFS2 (review is laggy again) - procfs - slab - all of MM - zram, zbud - various other random things: arch, filesystems. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (164 commits) nosave: consolidate __nosave_{begin,end} in <asm/sections.h> include/linux/screen_info.h: remove unused ORIG_* macros kernel/sys.c: compat sysinfo syscall: fix undefined behavior kernel/sys.c: whitespace fixes acct: eliminate compile warning kernel/async.c: switch to pr_foo() include/linux/blkdev.h: use NULL instead of zero include/linux/kernel.h: deduplicate code implementing clamp* macros include/linux/kernel.h: rewrite min3, max3 and clamp using min and max alpha: use Kbuild logic to include <asm-generic/sections.h> frv: remove deprecated IRQF_DISABLED frv: remove unused cpuinfo_frv and friends to fix future build error zbud: avoid accessing last unused freelist zsmalloc: simplify init_zspage free obj linking mm/zsmalloc.c: correct comment for fullness group computation zram: use notify_free to account all free notifications zram: report maximum used memory zram: zram memory size limitation zsmalloc: change return value unit of zs_get_total_size_bytes zsmalloc: move pages_allocated to zs_pool ...
2014-10-09nosave: consolidate __nosave_{begin,end} in <asm/sections.h>Geert Uytterhoeven
The different architectures used their own (and different) declarations: extern __visible const void __nosave_begin, __nosave_end; extern const void __nosave_begin, __nosave_end; extern long __nosave_begin, __nosave_end; Consolidate them using the first variant in <asm/sections.h>. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09common: dma-mapping: introduce common remapping functionsLaura Abbott
For architectures without coherent DMA, memory for DMA may need to be remapped with coherent attributes. Factor out the the remapping code from arm and put it in a common location to reduce code duplication. As part of this, the arm APIs are now migrated away from ioremap_page_range to the common APIs which use map_vm_area for remapping. This should be an equivalent change and using map_vm_area is more correct as ioremap_page_range is intended to bring in io addresses into the cpu space and not regular kernel managed memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Riley <davidriley@chromium.org> Cc: Olof Johansson <olof@lixom.net> Cc: Ritesh Harjain <ritesh.harjani@gmail.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Mitchel Humpherys <mitchelh@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09mm: remove misleading ARCH_USES_NUMA_PROT_NONEMel Gorman
ARCH_USES_NUMA_PROT_NONE was defined for architectures that implemented _PAGE_NUMA using _PROT_NONE. This saved using an additional PTE bit and relied on the fact that PROT_NONE vmas were skipped by the NUMA hinting fault scanner. This was found to be conceptually confusing with a lot of implicit assumptions and it was asked that an alternative be found. Commit c46a7c81 "x86: define _PAGE_NUMA by reusing software bits on the PMD and PTE levels" redefined _PAGE_NUMA on x86 to be one of the swap PTE bits and shrunk the maximum possible swap size but it did not go far enough. There are no architectures that reuse _PROT_NONE as _PROT_NUMA but the relics still exist. This patch removes ARCH_USES_NUMA_PROT_NONE and removes some unnecessary duplication in powerpc vs the generic implementation by defining the types the core NUMA helpers expected to exist from x86 with their ppc64 equivalent. This necessitated that a PTE bit mask be created that identified the bits that distinguish present from NUMA pte entries but it is expected this will only differ between arches based on _PAGE_PROTNONE. The naming for the generic helpers was taken from x86 originally but ppc64 has types that are equivalent for the purposes of the helper so they are mapped instead of duplicating code. Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09Merge tag 'pci-v3.18-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "The interesting things here are: - Turn on Config Request Retry Status Software Visibility. This caused hangs last time, but we included a fix this time. - Rework PCI device configuration to use _HPP/_HPX more aggressively - Allow PCI devices to be put into D3cold during system suspend - Add arm64 PCI support - Add APM X-Gene host bridge driver - Add TI Keystone host bridge driver - Add Xilinx AXI host bridge driver More detailed summary: Enumeration - Check Vendor ID only for Config Request Retry Status (Rajat Jain) - Enable Config Request Retry Status when supported (Rajat Jain) - Add generic domain handling (Catalin Marinas) - Generate uppercase hex for modalias interface class (Ricardo Ribalda Delgado) Resource management - Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources() (Yinghai Lu) - Increase IBM ipr SAS Crocodile BARs to at least system page size (Douglas Lehr) PCI device hotplug - Prevent NULL dereference during pciehp probe (Andreas Noever) - Move _HPP & _HPX handling into core (Bjorn Helgaas) - Apply _HPP to PCIe devices as well as PCI (Bjorn Helgaas) - Apply _HPP/_HPX to display devices (Bjorn Helgaas) - Preserve SERR & PARITY settings when applying _HPP/_HPX (Bjorn Helgaas) - Preserve MPS and MRRS settings when applying _HPP/_HPX (Bjorn Helgaas) - Apply _HPP/_HPX to all devices, not just hot-added ones (Bjorn Helgaas) - Fix wait time in pciehp timeout message (Yinghai Lu) - Add more pciehp Slot Control debug output (Yinghai Lu) - Stop disabling pciehp notifications during init (Yinghai Lu) MSI - Remove arch_msi_check_device() (Alexander Gordeev) - Rename pci_msi_check_device() to pci_msi_supported() (Alexander Gordeev) - Move D0 check into pci_msi_check_device() (Alexander Gordeev) - Remove unused kobject from struct msi_desc (Yijing Wang) - Remove "pos" from the struct msi_desc msi_attrib (Yijing Wang) - Add "msi_bus" sysfs MSI/MSI-X control for endpoints (Yijing Wang) - Use __get_cached_msi_msg() instead of get_cached_msi_msg() (Yijing Wang) - Use __read_msi_msg() instead of read_msi_msg() (Yijing Wang) - Use __write_msi_msg() instead of write_msi_msg() (Yijing Wang) Power management - Drop unused runtime PM support code for PCIe ports (Rafael J. Wysocki) - Allow PCI devices to be put into D3cold during system suspend (Rafael J. Wysocki) AER - Add additional AER error strings (Gong Chen) - Make <linux/aer.h> standalone includable (Thierry Reding) Virtualization - Add ACS quirk for Solarflare SFC9120 & SFC9140 (Alex Williamson) - Add ACS quirk for Intel 10G NICs (Alex Williamson) - Add ACS quirk for AMD A88X southbridge (Marti Raudsepp) - Remove unused pci_find_upstream_pcie_bridge(), pci_get_dma_source() (Alex Williamson) - Add device flag helpers (Ethan Zhao) - Assume all Mellanox devices have broken INTx masking (Gavin Shan) Generic host bridge driver - Fix ioport_map() for !CONFIG_GENERIC_IOMAP (Liviu Dudau) - Add pci_register_io_range() and pci_pio_to_address() (Liviu Dudau) - Define PCI_IOBASE as the base of virtual PCI IO space (Liviu Dudau) - Fix the conversion of IO ranges into IO resources (Liviu Dudau) - Add pci_get_new_domain_nr() and of_get_pci_domain_nr() (Liviu Dudau) - Add support for parsing PCI host bridge resources from DT (Liviu Dudau) - Add pci_remap_iospace() to map bus I/O resources (Liviu Dudau) - Add arm64 architectural support for PCI (Liviu Dudau) APM X-Gene - Add APM X-Gene PCIe driver (Tanmay Inamdar) - Add arm64 DT APM X-Gene PCIe device tree nodes (Tanmay Inamdar) Freescale i.MX6 - Probe in module_init(), not fs_initcall() (Lucas Stach) - Delay enabling reference clock for SS until it stabilizes (Tim Harvey) Marvell MVEBU - Fix uninitialized variable in mvebu_get_tgt_attr() (Thomas Petazzoni) NVIDIA Tegra - Make sure the PCIe PLL is really reset (Eric Yuen) - Add error path tegra_msi_teardown_irq() cleanup (Jisheng Zhang) - Fix extended configuration space mapping (Peter Daifuku) - Implement resource hierarchy (Thierry Reding) - Clear CLKREQ# enable on port disable (Thierry Reding) - Add Tegra124 support (Thierry Reding) ST Microelectronics SPEAr13xx - Pass config resource through reg property (Pratyush Anand) Synopsys DesignWare - Use NULL instead of false (Fabio Estevam) - Parse bus-range property from devicetree (Lucas Stach) - Use pci_create_root_bus() instead of pci_scan_root_bus() (Lucas Stach) - Remove pci_assign_unassigned_resources() (Lucas Stach) - Check private_data validity in single place (Lucas Stach) - Setup and clear exactly one MSI at a time (Lucas Stach) - Remove open-coded bitmap operations (Lucas Stach) - Fix configuration base address when using 'reg' (Minghuan Lian) - Fix IO resource end address calculation (Minghuan Lian) - Rename get_msi_data() to get_msi_addr() (Minghuan Lian) - Add get_msi_data() to pcie_host_ops (Minghuan Lian) - Add support for v3.65 hardware (Murali Karicheri) - Fold struct pcie_port_info into struct pcie_port (Pratyush Anand) TI Keystone - Add TI Keystone PCIe driver (Murali Karicheri) - Limit MRSS for all downstream devices (Murali Karicheri) - Assume controller is already in RC mode (Murali Karicheri) - Set device ID based on SoC to support multiple ports (Murali Karicheri) Xilinx AXI - Add Xilinx AXI PCIe driver (Srikanth Thokala) - Fix xilinx_pcie_assign_msi() return value test (Dan Carpenter) Miscellaneous - Clean up whitespace (Quentin Lambert) - Remove assignments from "if" conditions (Quentin Lambert) - Move PCI_VENDOR_ID_VMWARE to pci_ids.h (Francesco Ruggeri) - x86: Mark DMI tables as initialization data (Mathias Krause) - x86: Move __init annotation to the correct place (Mathias Krause) - x86: Mark constants of pci_mmcfg_nvidia_mcp55() as __initconst (Mathias Krause) - x86: Constify pci_mmcfg_probes[] array (Mathias Krause) - x86: Mark PCI BIOS initialization code as such (Mathias Krause) - Parenthesize PCI_DEVID and PCI_VPD_LRDT_ID parameters (Megan Kamiya) - Remove unnecessary variable in pci_add_dynid() (Tobias Klauser)" * tag 'pci-v3.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (109 commits) arm64: dts: Add APM X-Gene PCIe device tree nodes PCI: Add ACS quirk for AMD A88X southbridge devices PCI: xgene: Add APM X-Gene PCIe driver PCI: designware: Remove open-coded bitmap operations PCI/MSI: Remove unnecessary temporary variable PCI/MSI: Use __write_msi_msg() instead of write_msi_msg() MSI/powerpc: Use __read_msi_msg() instead of read_msi_msg() PCI/MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() PCI/MSI: Add "msi_bus" sysfs MSI/MSI-X control for endpoints PCI/MSI: Remove "pos" from the struct msi_desc msi_attrib PCI/MSI: Remove unused kobject from struct msi_desc PCI/MSI: Rename pci_msi_check_device() to pci_msi_supported() PCI/MSI: Move D0 check into pci_msi_check_device() PCI/MSI: Remove arch_msi_check_device() irqchip: armada-370-xp: Remove arch_msi_check_device() PCI/MSI/PPC: Remove arch_msi_check_device() arm64: Add architectural support for PCI PCI: Add pci_remap_iospace() to map bus I/O resources of/pci: Add support for parsing PCI host bridge resources from DT of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr() ... Conflicts: arch/arm64/boot/dts/apm-storm.dtsi
2014-10-09Merge tag 'gpio-v3.18-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO changes from Linus Walleij: "This is the bulk of GPIO changes for the v3.18 development cycle: - Increase the default ARCH_NR_GPIO from 256 to 512. This was done to avoid having a custom <asm/gpio.h> header for the x86 architecture - GPIO is custom and complicated enough as it is already! We want to move to a radix to store the descriptors going forward, and finally get rid of this fixed array size altogether. - Endgame patching of the gpio_remove() semantics initiated by Abdoulaye Berthe. It is not accepted by the system that the removal of a GPIO chip fails during eg reboot or shutdown, and therefore the return value has now painfully been refactored away. For special cases like GPIO expanders on a hot-pluggable bus like USB, we may later add some gpiochip_try_remove() call, but for the cases we have now, return values are moot. - Some incremental refactoring of the gpiolib core and ACPI GPIO library for more descriptor usage. - Refactor the chained IRQ handler set-up method to handle also threaded, nested interrupts and set up the parent IRQ correctly. Switch STMPE and TC3589x drivers to use this registration method. - Add a .irq_not_threaded flag to the struct gpio_chip, so that also GPIO expanders that block but are still not using threaded IRQ handlers. - New drivers for the ARM64 X-Gene SoC GPIO controller. - The syscon GPIO driver has been improved to handle the "DSP GPIO" found on the TI Keystone 2 SoC:s. - ADNP driver switched to use gpiolib irqchip helpers. - Refactor the DWAPB driver to support being instantiated from and MFD cell (platform device). - Incremental feature improvement in the Zynq, MCP23S08, DWAPB, OMAP, Xilinx and Crystalcove drivers. - Various minor fixes" * tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (52 commits) gpio: pch: Build context save/restore only for PM pinctrl: abx500: get rid of unused variable gpio: ks8695: fix 'else should follow close brace '}'' gpio: stmpe: add verbose debug code gpio: stmpe: fix up interrupt enable logic gpio: staticize xway_stp_init() gpio: handle also nested irqchips in the chained handler set-up gpio: set parent irq on chained handlers gpiolib: irqchip: use irq_find_mapping while removing irqchip gpio: crystalcove: support virtual GPIO pinctrl: bcm281xx: make Kconfig dependency more strict gpio: kona: enable only on BCM_MOBILE or for compile testing gpio, bcm-kona, LLVMLinux: Remove use of __initconst gpio: Fix ngpio in gpio-xilinx driver gpio: dwapb: fix pointer to integer cast gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard gpio: xgene: Remove unneeded forward declation for struct xgene_gpio gpio: xgene: Fix missing spin_lock_init() gpio: ks8695: fix switch case indentation gpiolib: add irq_not_threaded flag to gpio_chip ...
2014-10-09Merge branch 'timers-nohz-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Ingo Molnar: "Main changes: - Fix the deadlock reported by Dave Jones et al - Clean up and fix nohz_full interaction with arch abilities - nohz init code consolidation/cleanup" * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: nohz: nohz full depends on irq work self IPI support nohz: Consolidate nohz full init code arm64: Tell irq work about self IPI support arm: Tell irq work about self IPI support x86: Tell irq work about self IPI support irq_work: Force raised irq work to run on irq work interrupt irq_work: Introduce arch_irq_work_has_interrupt() nohz: Move nohz full init call to tick init
2014-10-03locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()Pranith Kumar
Use the much more reader friendly ACCESS_ONCE() instead of the cast to volatile. This is purely a stylistic change. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-arch@vger.kernel.org Link: http://lkml.kernel.org/r/1411482607-20948-1-git-send-email-bobby.prani@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-03sched, time: Fix build error with 64 bit cputime_t on 32 bit systemsRik van Riel
On 32 bit systems cmpxchg cannot handle 64 bit values, so some additional magic is required to allow a 32 bit system with CONFIG_VIRT_CPU_ACCOUNTING_GEN=y enabled to build. Make sure the correct cmpxchg function is used when doing an atomic swap of a cputime_t. Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rik van Riel <riel@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: umgwanakikbuti@gmail.com Cc: fweisbec@gmail.com Cc: srao@redhat.com Cc: lwoodman@redhat.com Cc: atheurer@redhat.com Cc: oleg@redhat.com Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: linux390@de.ibm.com Cc: linux-arch@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Link: http://lkml.kernel.org/r/20140930155947.070cdb1f@annuminas.surriel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-02ARM: 8168/1: extend __init_end to a page align addressYalin Wang
This patch changes the __init_end address to a page align address, so that free_initmem() can free the whole .init section, because if the end address is not page aligned, it will round down to a page align address, then the tail unligned page will not be freed. Signed-off-by: wang <yalin.wang2010@gmail.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-09-30PCI: Add pci_remap_iospace() to map bus I/O resourcesLiviu Dudau
Add pci_remap_iospace() to map bus I/O resources into the CPU virtual address space. Architectures with special needs may provide their own version, but most should be able to use this one. This function is useful for PCI host bridge drivers that need to map the PCI I/O resources into virtual memory space. [bhelgaas: phys_addr description, drop temporary "err" variable] Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> CC: Arnd Bergmann <arnd@arndb.de>
2014-09-30asm-generic/io.h: Fix ioport_map() for !CONFIG_GENERIC_IOMAPLiviu Dudau
The !CONFIG_GENERIC_IOMAP version of ioport_map() is wrong. It returns a mapped, i.e., virtual, address that can start from zero and completely ignores the PCI_IOBASE and IO_SPACE_LIMIT that most architectures that use !CONFIG_GENERIC_MAP define. Tested-by: Tanmay Inamdar <tinamdar@apm.com> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-09-25asm-generic: COMMON_CLK defines __clk_{get,put}Mike Turquette
If CONFIG_COMMON_CLK is selected then __clk_get and __clk_put are defined in drivers/clk/clk.c and declared in include/linux/clkdev.h. Sylwester's series[0] to properly support clk_{get,put} in the common clock framework made changes to the asm-specific clkdev.h headers, but not the asm-generic version. Tomeu's recent changes[1] to introduce a provider/consumer split in the clock framework uncovered this problem, causing the following build error on any architecture using the asm-generic clkdev.h (e.g. x86 architecture and the ACPI LPSS driver): In file included from drivers/acpi/acpi_lpss.c:15:0: include/linux/clkdev.h:59:5: error: conflicting types for ‘__clk_get’ int __clk_get(struct clk_core *clk); ^ In file included from arch/x86/include/generated/asm/clkdev.h:1:0, from include/linux/clkdev.h:15, from drivers/acpi/acpi_lpss.c:15: include/asm-generic/clkdev.h:20:19: note: previous definition of ‘__clk_get’ was here static inline int __clk_get(struct clk *clk) { return 1; } ^ Fixed by only declarating __clk_get and __clk_put when CONFIG_COMMON_CLK is set. [0] http://lkml.kernel.org/r/<1386177127-2894-5-git-send-email-s.nawrocki@samsung.com> [1] http://lkml.kernel.org/r/<1409758148-20104-1-git-send-email-tomeu.vizoso@collabora.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-09-23syscall.h: fix doc text for syscall_get_arch()Richard Guy Briggs
syscall_get_arch() used to take a task as a argument. It now uses current. Fix the doc text. Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com>
2014-09-23gpio: Increase ARCH_NR_GPIOs to 512Mika Westerberg
Some newer Intel SoCs, like Braswell already have more than 256 GPIOs available so the default limit is exceeded. Instead of adding more architecture specific gpio.h files with custom ARCH_NR_GPIOs we increase the gpiolib default limit to be twice the current. Current generic ARCH_NR_GPIOS limit is 256 which starts to be too small for newer Intel SoCs like Braswell. In order to support GPIO controllers on these SoCs we increase ARCH_NR_GPIOS to be 512 which should be sufficient for now. The kernel size increases a bit with this change. Below is an example of x86_64 kernel image. ARCH_NR_GPIOS=256 text data bss dec hex filename 11476173 1971328 1265664 14713165 e0814d vmlinux ARCH_NR_GPIOS=512 text data bss dec hex filename 11476173 1971328 1269760 14717261 e0914d vmlinux So the BSS size and this the kernel image size increases by 4k. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-22asm-generic: Add dma-contiguous.hZubair Lutfullah Kakakhel
This header is used by arm64 and x86 individually. Adding to asm-generic to avoid further code repetition while adding cma to mips. Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: catalin.marinas@arm.com Cc: will.deacon@arm.com Cc: tglx@linutronix.de Cc: mingo@redhat.com Cc: hpa@zytor.com Cc: arnd@arndb.de Cc: gregkh@linuxfoundation.org Cc: m.szyprowski@samsung.com Cc: x86@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-arch@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7357/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-09-13irq_work: Introduce arch_irq_work_has_interrupt()Peter Zijlstra
The nohz full code needs irq work to trigger its own interrupt so that the subsystem can work even when the tick is stopped. Lets introduce arch_irq_work_has_interrupt() that archs can override to tell about their support for this ability. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2014-08-26dma-mapping: Provide write-combine allocationsThierry Reding
Provide an implementation for dma_{alloc,free,mmap}_writecombine() when the architecture supports DMA attributes. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2014-08-14locking,arch: Rewrite generic atomic supportPeter Zijlstra
Rewrite generic atomic support to only require cmpxchg(), generate all other primitives from that. Furthermore reduce the endless repetition for all these primitives to a few CPP macros. This way we get more for less lines. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20140508135852.940119622@infradead.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Howells <dhowells@redhat.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-arch@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-08-08Merge tag 'gpio-v3.17-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO update from Linus Walleij: "This is the bulk of GPIO changes for the v3.17 development cycle, and this time we got a lot of action going on and it will continue: - The core GPIO library implementation has been split up in three different files: - gpiolib.c for the latest and greatest and shiny GPIO library code using GPIO descriptors only - gpiolib-legacy.c for the old integer number space API that we are phasing out gradually - gpiolib-sysfs.c for the sysfs interface that we are not entirely happy with, but has to live on for ABI compatibility - Add a flags argument to *gpiod_get* functions, with some backward-compatibility macros to ease transitions. We should have had the flags there from the beginning it seems, now we need to clean up the mess. There is a plan on how to move forward here devised by Alexandre Courbot and Mark Brown - Split off a special <linux/gpio/machine.h> header for the board gpio table registration, as per example from the regulator subsystem - Start to kill off the return value from gpiochip_remove() by removing the __must_check attribute and removing all checks inside the drivers/gpio directory. The rationale is: well what were we supposed to do if there is an error code? Not much: print an error message. And gpiolib already does that. So make this function return void eventually - Some cleanups of hairy gpiolib code, make some functions not to be used outside the library private and make sure they are not exported, remove gpiod_lock/unlock_as_irq() as the existing function is for driver-internal use and fine as it is, delete gpio_ensure_requested() as it is not meaningful anymore - Support the GPIOF_ACTIVE_LOW flag from gpio_request_one() function calls, which is logical since this is already supported when referencing GPIOs from e.g. device trees - Switch STMPE, intel-mid, lynxpoint and ACPI (!) to use the gpiolib irqchip helpers cutting down on GPIO irqchip boilerplate a bit more - New driver for the Zynq GPIO block - The usual incremental improvements around a bunch of drivers - Janitorial syntactic and semantic cleanups by Jingoo Han, and Rickard Strandqvist especially" * tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (37 commits) MAINTAINERS: update GPIO include files gpio: add missing includes in machine.h gpio: add flags argument to gpiod_get*() functions MAINTAINERS: Update Samsung pin control entry gpio / ACPI: Move event handling registration to gpiolib irqchip helpers gpio: lynxpoint: Convert to use gpiolib irqchip gpio: split gpiod board registration into machine header gpio: remove gpio_ensure_requested() gpio: remove useless check in gpiolib_sysfs_init() gpiolib: Export gpiochip_request_own_desc and gpiochip_free_own_desc gpio: move gpio_ensure_requested() into legacy C file gpio: remove gpiod_lock/unlock_as_irq() gpio: make gpiochip_get_desc() gpiolib-private gpio: simplify gpiochip_export() gpio: remove export of private of_get_named_gpio_flags() gpio: Add support for GPIOF_ACTIVE_LOW to gpio_request_one functions gpio: zynq: Clear pending interrupt when enabling a IRQ gpio: drop retval check enforcing from gpiochip_remove() gpio: remove all usage of gpio_remove retval in driver/gpio devicetree: Add Zynq GPIO devicetree bindings documentation ...
2014-08-08pci-dma-compat: add pci_zalloc_consistent helperJoe Perches
Add this helper for consistency with pci_zalloc_coherent and the ability to remove unnecessary memset(,0,) uses. Signed-off-by: Joe Perches <joe@perches.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: "Stephen M. Cameron" <scameron@beardog.cce.hp.com> Cc: Adam Radford <linuxraid@lsi.com> Cc: Chaoming Li <chaoming_li@realsil.com.cn> Cc: Chas Williams <chas@cmf.nrl.navy.mil> Cc: Christian Benvenuti <benve@cisco.com> Cc: Christopher Harrer <charrer@alacritech.com> Cc: Dario Ballabio <ballabio_dario@emc.com> Cc: David Airlie <airlied@linux.ie> Cc: Don Fry <pcnet32@frontier.com> Cc: Faisal Latif <faisal.latif@intel.com> Cc: Forest Bond <forest@alittletooquiet.net> Cc: Govindarajulu Varadarajan <_govind@gmx.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: Hans Verkuil <hverkuil@xs4all.nl> Cc: Jayamohan Kallickal <jayamohan.kallickal@emulex.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com> Cc: Larry Finger <Larry.Finger@lwfinger.net> Cc: Lennert Buytenhek <buytenh@wantstofly.org> Cc: Lior Dotan <liodot@gmail.com> Cc: Manish Chopra <manish.chopra@qlogic.com> Cc: Manohar Vanga <manohar.vanga@gmail.com> Cc: Martyn Welch <martyn.welch@ge.com> Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Cc: Michael Neuffer <mike@i-Connect.Net> Cc: Mirko Lindner <mlindner@marvell.com> Cc: Neel Patel <neepatel@cisco.com> Cc: Neela Syam Kolli <megaraidlinux@lsi.com> Cc: Rajesh Borundia <rajesh.borundia@qlogic.com> Cc: Roland Dreier <roland@kernel.org> Cc: Ron Mercer <ron.mercer@qlogic.com> Cc: Samuel Ortiz <samuel@sortiz.org> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Shahed Shaikh <shahed.shaikh@qlogic.com> Cc: Sony Chacko <sony.chacko@qlogic.com> Cc: Stanislav Yakovlev <stas.yakovlev@gmail.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Steve Wise <swise@opengridcomputing.com> Cc: Sujith Sankar <ssujith@cisco.com> Cc: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-04Merge tag 'char-misc-3.17-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char / misc driver patches from Greg KH: "Here's the big driver misc / char pull request for 3.17-rc1. Lots of things in here, the thunderbolt support for Apple laptops, some other new drivers, testing fixes, and other good things. All have been in linux-next for a long time" * tag 'char-misc-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (119 commits) misc: bh1780: Introduce the use of devm_kzalloc Lattice ECP3 FPGA: Correct endianness drivers/misc/ti-st: Load firmware from ti-connectivity directory. dt-bindings: extcon: Add support for SM5502 MUIC device extcon: sm5502: Change internal hardware switch according to cable type extcon: sm5502: Detect cable state after completing platform booting extcon: sm5502: Add support new SM5502 extcon device driver extcon: arizona: Get MICVDD against extcon device extcon: Remove unnecessary OOM messages misc: vexpress: Fix sparse non static symbol warnings mei: drop unused hw dependent fw status functions misc: bh1770glc: Use managed functions pcmcia: remove DEFINE_PCI_DEVICE_TABLE usage misc: remove DEFINE_PCI_DEVICE_TABLE usage ipack: Replace DEFINE_PCI_DEVICE_TABLE macro use drivers/char/dsp56k.c: drop check for negativity of unsigned parameter mei: fix return value on disconnect timeout mei: don't schedule suspend in pm idle mei: start disconnect request timer consistently mei: reset client connection state on timeout ...
2014-08-04Merge branch 'for-3.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu Pull percpu updates from Tejun Heo: - Major reorganization of percpu header files which I think makes things a lot more readable and logical than before. - percpu-refcount is updated so that it requires explicit destruction and can be reinitialized if necessary. This was pulled into the block tree to replace the custom percpu refcnting implemented in blk-mq. - In the process, percpu and percpu-refcount got cleaned up a bit * 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (21 commits) percpu-refcount: implement percpu_ref_reinit() and percpu_ref_is_zero() percpu-refcount: require percpu_ref to be exited explicitly percpu-refcount: use unsigned long for pcpu_count pointer percpu-refcount: add helpers for ->percpu_count accesses percpu-refcount: one bit is enough for REF_STATUS percpu-refcount, aio: use percpu_ref_cancel_init() in ioctx_alloc() workqueue: stronger test in process_one_work() workqueue: clear POOL_DISASSOCIATED in rebind_workers() percpu: Use ALIGN macro instead of hand coding alignment calculation percpu: invoke __verify_pcpu_ptr() from the generic part of accessors and operations percpu: preffity percpu header files percpu: use raw_cpu_*() to define __this_cpu_*() percpu: reorder macros in percpu header files percpu: move {raw|this}_cpu_*() definitions to include/linux/percpu-defs.h percpu: move generic {raw|this}_cpu_*_N() definitions to include/asm-generic/percpu.h percpu: only allow sized arch overrides for {raw|this}_cpu_*() ops percpu: reorganize include/linux/percpu-defs.h percpu: move accessors from include/linux/percpu.h to percpu-defs.h percpu: include/asm-generic/percpu.h should contain only arch-overridable parts percpu: introduce arch_raw_cpu_ptr() ...
2014-08-04Merge tag 'edac_for_3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds
Pull EDAC changes from Borislav Petkov: "EDAC queue for 3.17: - One new edac driver for Intel E3-12xx DRAM controllers. - Out-of-subsystem changes are making the non-atomic iomem 64-bit accessors' naming explicit to show both exact order of the 32-bit accesses and the non-atomicity of the 64-bit access. Usage locations are more verbose now as to what access is exactly being done vs having a not-very telling "readq" there, for example. This is needed by E3-12xx hardware where certain mmapped registers cannot be accessed with requests crossing a dword boundary. From Jason Baron. - Extending AMD MCE signatures to a new model 60h in family 15h, from Aravind Gopalakrishnan. - An unsigned check cleanup, from Fabian Frederick" * tag 'edac_for_3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: EDAC, MCE, AMD: Add MCE decoding for F15h M60h MAINTAINERS: add ie31200_edac entry ie31200_edac: Allocate mci and map mchbar first ie31200_edac: Introduce the driver x38_edac: make use of lo_hi_readq() readq/writeq: Add explicit lo_hi_[read|write]_q and hi_lo_[read|write]_q EDAC, edac_module.c: Remove unnecessary test on unsigned value
2014-07-24gpio: remove gpio_ensure_requested()Alexandre Courbot
gpio_ensure_requested() has been introduced in Feb. 2008 by commit d2876d08d86f2 to force users of the GPIO API to explicitly request GPIOs before using them. Hopefully by now all GPIOs are correctly requested and this extra check can be omitted ; in any case the GPIO maintainers won't feel bad if machines start failing after 6 years of warnings. This patch removes that function from the dark ages. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-23gpio: move gpio_ensure_requested() into legacy C fileAlexandre Courbot
gpio_ensure_requested() only makes sense when using the integer-based GPIO API, so make sure it is called from there instead of the gpiod API which we know cannot be called with a non-requested GPIO anyway. The uses of gpio_ensure_requested() in the gpiod API were kind of out-of-place anyway, so putting them in gpio-legacy.c helps clearing the code. Actually, considering the time this ensure_requested mechanism has been around, maybe we should just turn this patch into "remove gpio_ensure_requested()" if we know for sure that no user depend on it anymore? Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-23gpio: remove gpiod_lock/unlock_as_irq()Alexandre Courbot
gpio_lock/unlock_as_irq() are working with (chip, offset) arguments and are thus not using the old integer namespace. Therefore, there is no reason to have gpiod variants of these functions working with descriptors, especially since the (chip, offset) tuple is more suitable to the users of these functions (GPIO drivers, whereas GPIO descriptors are targeted at GPIO consumers). Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-13Merge 3.16-rc5 into char-misc-nextGreg Kroah-Hartman
This resolves a number of merge issues with changes in this tree and Linus's tree at the same time. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-04readq/writeq: Add explicit lo_hi_[read|write]_q and hi_lo_[read|write]_qJason Baron
Even on x86-64, I've found the need to break up a readq() into 2 readl() calls. According to the Intel datasheet for the E3-1200 processor: " Software must not access B0/D0/F0 32-bit memory-mapped registers with requests that cross a DW boundary. " (http://www.intel.com/content/www/us/en/processors/xeon/xeon-e3-1200-family-vol-2-datasheet.html p. 16) I can confirm this is true via several hard machine lockups. Thus, add explicit hi_lo_[readq|write]_q and lo_hi_[read|write]_q so that these uses are spelled out. Signed-off-by: Jason Baron <jbaron@akamai.com> Link: http://lkml.kernel.org/r/281f09da7ad01e5cea99737ec34d2399bdbbbf63.1403818526.git.jbaron@akamai.com Signed-off-by: Borislav Petkov <bp@suse.de>
2014-07-01core: fix typo in percpu read_mostly sectionZhengyu He
This fixes a typo that named the read_mostly section of percpu as readmostly. It works fine with SMP because the linker script specifies .data..percpu..readmostly. However, UP kernel builds don't have percpu sections defined and the non-percpu version of the section is called data..read_mostly, so .data..readmostly will float around and may break things unexpectedly. Looking at the original change that introduced data..percpu..readmostly (commit c957ef2c59e952803766ddc22e89981ab534606f), it looks like this was the original intention. Tested: Built UP kernel and confirmed the sections got merged. - Before the patch: $ objdump -h vmlinux.o | grep '\.data\.\.read.*mostly' 38 .data..read_mostly 00004418 0000000000000000 0000000000000000 00431ac0 2**6 50 .data..readmostly 00000014 0000000000000000 0000000000000000 00444000 2**3 - After the patch: $ objdump -h vmlinux.o | grep '\.data\.\.read.*mostly' 38 .data..read_mostly 00004438 0000000000000000 0000000000000000 00431ac0 2**6 Signed-off-by: Zhengyu He <hzy@google.com> Signed-off-by: Filipe Brandenburger <filbranden@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2014-06-19PCI: Add pci_fixup_suspend_late quirk passAndreas Noever
Add pci_fixup_suspend_late as a new pci_fixup_pass. The pass is called from suspend_noirq and poweroff_noirq. Using the same pass for suspend and hibernate is consistent with resume_early which is called by resume_noirq and restore_noirq. The new quirk pass is required for Thunderbolt support on Apple hardware. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-17percpu: preffity percpu header filesTejun Heo
percpu macros are difficult to read. It's partly because they're fairly complex but also because they simply lack visual and conventional consistency to an unusual degree. The preceding patches tried to organize macro definitions consistently by their roles. This patch makes the following cosmetic changes to improve overall readability. * Use consistent convention for multi-line macro definitions - "do {" or "({" are now put on their own lines and the line continuing '\' are all put on the same column. * Temp variables used inside macro are consistently given "__" prefix. * When a macro argument is passed to another macro or a function, putting extra parenthses around it doesn't help anything. Don't put them. * _this_cpu_generic_*() are renamed to this_cpu_generic_*() so that they're consistent with raw_cpu_generic_*(). * Reorganize raw_cpu_*() and this_cpu_*() definitions so that trivial wrappers are collected in one place after actual operation definitions. * Other misc cleanups including reorganizing comments. All changes in this patch are cosmetic and cause no functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Christoph Lameter <cl@linux.com>
2014-06-17percpu: reorder macros in percpu header filesTejun Heo
* In include/asm-generic/percpu.h, collect {raw|_this}_cpu_generic*() macros into one place. They were dispersed through {raw|this}_cpu_*_N() definitions and the visiual inconsistency was making following the code unnecessarily difficult. * In include/linux/percpu-defs.h, move __verify_pcpu_ptr() later in the file so that it's right above accessor definitions where it's actually used. This is pure reorganization. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Christoph Lameter <cl@linux.com>
2014-06-17percpu: move generic {raw|this}_cpu_*_N() definitions to ↵Tejun Heo
include/asm-generic/percpu.h {raw|this}_cpu_*_N() operations are expected to be provided by archs and the generic definitions are provided as fallbacks. As such, these firmly belong to include/asm-generic/percpu.h. Move the generic definitions to include/asm-generic/percpu.h. The code is moved mostly verbatim; however, raw_cpu_*_N() are placed above this_cpu_*_N() which is more conventional as the raw operations may be used to defined other variants. This is pure reorganization. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Christoph Lameter <cl@linux.com>
2014-06-17percpu: include/asm-generic/percpu.h should contain only arch-overridable partsTejun Heo
The roles of the various percpu header files has become unclear. There are four header files involved. include/linux/percpu-defs.h include/linux/percpu.h include/asm-generic/percpu.h arch/*/include/asm/percpu.h The original intention for include/asm-generic/percpu.h is providing generic definitions for arch-overridable parts; however, it now hosts various stuff which can't be overridden by archs. Also, include/linux/percpu-defs.h was initially added to contain section and percpu variable definition macros so that arch header files can make use of them without worrying about introducing cyclic inclusion dependency by including include/linux/percpu.h; however, arch headers sometimes need to access percpu variables too and this is one of the reasons why some accessors were implemented in include/linux/asm-generic/percpu.h. Let's clear up the situation by making include/asm-generic/percpu.h contain only arch-overridable parts and moving accessors and operations into include/linux/percpu-defs. Note that this patch only moves things from include/asm-generic/percpu.h. include/linux/percpu.h will be taken care of by later patches. This patch moves the followings. * SHIFT_PERCPU_PTR() / VERIFY_PERCPU_PTR() * per_cpu() * raw_cpu_ptr() * this_cpu_ptr() * __get_cpu_var() * __raw_get_cpu_var() * __this_cpu_ptr() * PER_CPU_[SHARED_]ALIGNED_SECTION * PER_CPU_[SHARED_]ALIGNED_SECTION * PER_CPU_FIRST_SECTION This patch is pure reorganization. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Christoph Lameter <cl@linux.com>
2014-06-17percpu: introduce arch_raw_cpu_ptr()Tejun Heo
Currently, archs can override raw_cpu_ptr() directly; however, we wanna build a layer of indirection in the generic part of percpu so that we can implement generic features there without affecting archs. Introduce arch_raw_cpu_ptr() which is used to define raw_cpu_ptr() by generic percpu code. The two are identical for now. x86 is currently the only arch which overrides raw_cpu_ptr() and is converted to define arch_raw_cpu_ptr() instead. This doesn't introduce any functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com>
2014-06-17percpu: disallow archs from overriding SHIFT_PERCPU_PTR()Tejun Heo
It has been about half a decade since all archs started using the dynamic percpu allocator and thus the same SHIFT_PERCPU_PTR() implementation. There's no benefit in overriding SHIFT_PERCPU_PTR() anymore. Remove #ifndef around it to clarify that this is identical regardless of the arch. This patch doesn't cause any functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Christoph Lameter <cl@linux.com>
2014-06-12Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull more perf updates from Ingo Molnar: "A second round of perf updates: - wide reaching kprobes sanitization and robustization, with the hope of fixing all 'probe this function crashes the kernel' bugs, by Masami Hiramatsu. - uprobes updates from Oleg Nesterov: tmpfs support, corner case fixes and robustization work. - perf tooling updates and fixes from Jiri Olsa, Namhyung Ki, Arnaldo et al: * Add support to accumulate hist periods (Namhyung Kim) * various fixes, refactorings and enhancements" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (101 commits) perf: Differentiate exec() and non-exec() comm events perf: Fix perf_event_comm() vs. exec() assumption uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates perf/documentation: Add description for conditional branch filter perf/x86: Add conditional branch filtering support perf/tool: Add conditional branch filter 'cond' to perf record perf: Add new conditional branch filter 'PERF_SAMPLE_BRANCH_COND' uprobes: Teach copy_insn() to support tmpfs uprobes: Shift ->readpage check from __copy_insn() to uprobe_register() perf/x86: Use common PMU interrupt disabled code perf/ARM: Use common PMU interrupt disabled code perf: Disable sampled events if no PMU interrupt perf: Fix use after free in perf_remove_from_context() perf tools: Fix 'make help' message error perf record: Fix poll return value propagation perf tools: Move elide bool into perf_hpp_fmt struct perf tools: Remove elide setup for SORT_MODE__MEMORY mode perf tools: Fix "==" into "=" in ui_browser__warning assignment perf tools: Allow overriding sysfs and proc finding with env var perf tools: Consider header files outside perf directory in tags target ...
2014-06-12Merge branch 'locking-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull more locking changes from Ingo Molnar: "This is the second round of locking tree updates for v3.16, offering large system scalability improvements: - optimistic spinning for rwsems, from Davidlohr Bueso. - 'qrwlocks' core code and x86 enablement, from Waiman Long and PeterZ" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, locking/rwlocks: Enable qrwlocks on x86 locking/rwlocks: Introduce 'qrwlocks' - fair, queued rwlocks locking/mutexes: Documentation update/rewrite locking/rwsem: Fix checkpatch.pl warnings locking/rwsem: Fix warnings for CONFIG_RWSEM_GENERIC_SPINLOCK locking/rwsem: Support optimistic spinning
2014-06-06include/asm-generic/ioctl.h: fix _IOC_TYPECHECK sparse errorHans Verkuil
When running sparse over drivers/media/v4l2-core/v4l2-ioctl.c I get these errors: drivers/media/v4l2-core/v4l2-ioctl.c:2043:9: error: bad integer constant expression drivers/media/v4l2-core/v4l2-ioctl.c:2044:9: error: bad integer constant expression drivers/media/v4l2-core/v4l2-ioctl.c:2045:9: error: bad integer constant expression drivers/media/v4l2-core/v4l2-ioctl.c:2046:9: error: bad integer constant expression etc. The root cause of that turns out to be in include/asm-generic/ioctl.h: #include <uapi/asm-generic/ioctl.h> /* provoke compile error for invalid uses of size argument */ extern unsigned int __invalid_size_argument_for_IOC; #define _IOC_TYPECHECK(t) \ ((sizeof(t) == sizeof(t[1]) && \ sizeof(t) < (1 << _IOC_SIZEBITS)) ? \ sizeof(t) : __invalid_size_argument_for_IOC) If it is defined as this (as is already done if __KERNEL__ is not defined): #define _IOC_TYPECHECK(t) (sizeof(t)) then all is well with the world. This patch allows sparse to work correctly. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-06Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into next Pull arm64 updates from Catalin Marinas: - Optimised assembly string/memory routines (based on the AArch64 Cortex Strings library contributed to glibc but re-licensed under GPLv2) - Optimised crypto algorithms making use of the ARMv8 crypto extensions (together with kernel API for using FPSIMD instructions in interrupt context) - Ftrace support - CPU topology parsing from DT - ESR_EL1 (Exception Syndrome Register) exposed to user space signal handlers for SIGSEGV/SIGBUS (useful to emulation tools like Qemu) - 1GB section linear mapping if applicable - Barriers usage clean-up - Default pgprot clean-up Conflicts as per Catalin. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (57 commits) arm64: kernel: initialize broadcast hrtimer based clock event device arm64: ftrace: Add system call tracepoint arm64: ftrace: Add CALLER_ADDRx macros arm64: ftrace: Add dynamic ftrace support arm64: Add ftrace support ftrace: Add arm64 support to recordmcount arm64: Add 'notrace' attribute to unwind_frame() for ftrace arm64: add __ASSEMBLY__ in asm/insn.h arm64: Fix linker script entry point arm64: lib: Implement optimized string length routines arm64: lib: Implement optimized string compare routines arm64: lib: Implement optimized memcmp routine arm64: lib: Implement optimized memset routine arm64: lib: Implement optimized memmove routine arm64: lib: Implement optimized memcpy routine arm64: defconfig: enable a few more common/useful options in defconfig ftrace: Make CALLER_ADDRx macros more generic arm64: Fix deadlock scenario with smp_send_stop() arm64: Fix machine_shutdown() definition arm64: Support arch_irq_work_raise() via self IPIs ...
2014-06-06locking/rwlocks: Introduce 'qrwlocks' - fair, queued rwlocksWaiman Long
This rwlock uses the arch_spin_lock_t as a waitqueue, and assuming the arch_spin_lock_t is a fair lock (ticket,mcs etc..) the resulting rwlock is a fair lock. It fits in the same 8 bytes as the regular rwlock_t by folding the reader and writer count into a single integer, using the remaining 4 bytes for the arch_spinlock_t. Architectures that can single-copy adress bytes can optimize queue_write_unlock() with a 0 write to the LSB (the write count). Performance as measured by Davidlohr Bueso (rwlock_t -> qrwlock_t): +--------------+-------------+---------------+ | Workload | #users | delta | +--------------+-------------+---------------+ | alltests | > 1400 | -4.83% | | custom | 0-100,> 100 | +1.43%,-1.57% | | high_systime | > 1000 | -2.61 | | shared | all | +0.32 | +--------------+-------------+---------------+ http://www.stgolabs.net/qrwlock-stuff/aim7-results-vs-rwsem_optsin/ Signed-off-by: Waiman Long <Waiman.Long@hp.com> [peterz: near complete rewrite] Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/n/tip-gac1nnl3wvs2ij87zv2xkdzq@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-06Merge branch 'perf/urgent' into perf/core, to resolve conflict and to ↵Ingo Molnar
prepare for new patches Conflicts: arch/x86/kernel/traps.c Signed-off-by: Ingo Molnar <mingo@kernel.org>