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2016-03-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds3-22/+22
Pull arch/tile bugfixes from Chris Metcalf: "These include updates to MAINTAINERS, some comment spelling fixes, and a bugfix to the tile kgdb.c support" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: Fix misspellings in comments. MAINTAINERS: update web link for tile architecture MAINTAINERS: update arch/tile maintainer email domain tile kgdb: fix bug in copy to gdb regs, and optimize memset
2016-03-25arch, ftrace: for KASAN put hard/soft IRQ entries into separate sectionsAlexander Potapenko1-0/+1
KASAN needs to know whether the allocation happens in an IRQ handler. This lets us strip everything below the IRQ entry point to reduce the number of unique stack traces needed to be stored. Move the definition of __irq_entry to <linux/interrupt.h> so that the users don't need to pull in <linux/ftrace.h>. Also introduce the __softirq_entry macro which is similar to __irq_entry, but puts the corresponding functions to the .softirqentry.text section. Signed-off-by: Alexander Potapenko <glider@google.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Andrey Konovalov <adech.fo@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Konstantin Serebryany <kcc@google.com> Cc: Dmitry Chernenkov <dmitryc@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2-2/+2
Pull networking updates from David Miller: "Highlights: 1) Support more Realtek wireless chips, from Jes Sorenson. 2) New BPF types for per-cpu hash and arrap maps, from Alexei Starovoitov. 3) Make several TCP sysctls per-namespace, from Nikolay Borisov. 4) Allow the use of SO_REUSEPORT in order to do per-thread processing of incoming TCP/UDP connections. The muxing can be done using a BPF program which hashes the incoming packet. From Craig Gallek. 5) Add a multiplexer for TCP streams, to provide a messaged based interface. BPF programs can be used to determine the message boundaries. From Tom Herbert. 6) Add 802.1AE MACSEC support, from Sabrina Dubroca. 7) Avoid factorial complexity when taking down an inetdev interface with lots of configured addresses. We were doing things like traversing the entire address less for each address removed, and flushing the entire netfilter conntrack table for every address as well. 8) Add and use SKB bulk free infrastructure, from Jesper Brouer. 9) Allow offloading u32 classifiers to hardware, and implement for ixgbe, from John Fastabend. 10) Allow configuring IRQ coalescing parameters on a per-queue basis, from Kan Liang. 11) Extend ethtool so that larger link mode masks can be supported. From David Decotigny. 12) Introduce devlink, which can be used to configure port link types (ethernet vs Infiniband, etc.), port splitting, and switch device level attributes as a whole. From Jiri Pirko. 13) Hardware offload support for flower classifiers, from Amir Vadai. 14) Add "Local Checksum Offload". Basically, for a tunneled packet the checksum of the outer header is 'constant' (because with the checksum field filled into the inner protocol header, the payload of the outer frame checksums to 'zero'), and we can take advantage of that in various ways. From Edward Cree" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1548 commits) bonding: fix bond_get_stats() net: bcmgenet: fix dma api length mismatch net/mlx4_core: Fix backward compatibility on VFs phy: mdio-thunder: Fix some Kconfig typos lan78xx: add ndo_get_stats64 lan78xx: handle statistics counter rollover RDS: TCP: Remove unused constant RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket net: smc911x: convert pxa dma to dmaengine team: remove duplicate set of flag IFF_MULTICAST bonding: remove duplicate set of flag IFF_MULTICAST net: fix a comment typo ethernet: micrel: fix some error codes ip_tunnels, bpf: define IP_TUNNEL_OPTS_MAX and use it bpf, dst: add and use dst_tclassid helper bpf: make skb->tc_classid also readable net: mvneta: bm: clarify dependencies cls_bpf: reset class and reuse major in da ldmvsw: Checkpatch sunvnet.c and sunvnet_common.c ldmvsw: Add ldmvsw.c driver code ...
2016-03-18Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-5/+8
Merge second patch-bomb from Andrew Morton: - a couple of hotfixes - the rest of MM - a new timer slack control in procfs - a couple of procfs fixes - a few misc things - some printk tweaks - lib/ updates, notably to radix-tree. - add my and Nick Piggin's old userspace radix-tree test harness to tools/testing/radix-tree/. Matthew said it was a godsend during the radix-tree work he did. - a few code-size improvements, switching to __always_inline where gcc screwed up. - partially implement character sets in sscanf * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits) sscanf: implement basic character sets lib/bug.c: use common WARN helper param: convert some "on"/"off" users to strtobool lib: add "on"/"off" support to kstrtobool lib: update single-char callers of strtobool() lib: move strtobool() to kstrtobool() include/linux/unaligned: force inlining of byteswap operations include/uapi/linux/byteorder, swab: force inlining of some byteswap operations include/asm-generic/atomic-long.h: force inlining of some atomic_long operations usb: common: convert to use match_string() helper ide: hpt366: convert to use match_string() helper ata: hpt366: convert to use match_string() helper power: ab8500: convert to use match_string() helper power: charger_manager: convert to use match_string() helper drm/edid: convert to use match_string() helper pinctrl: convert to use match_string() helper device property: convert to use match_string() helper lib/string: introduce match_string() helper radix-tree tests: add test for radix_tree_iter_next radix-tree tests: add regression3 test ...
2016-03-17mm: cleanup *pte_alloc* interfacesKirill A. Shutemov1-1/+1
There are few things about *pte_alloc*() helpers worth cleaning up: - 'vma' argument is unused, let's drop it; - most __pte_alloc() callers do speculative check for pmd_none(), before taking ptl: let's introduce pte_alloc() macro which does the check. The only direct user of __pte_alloc left is userfaultfd, which has different expectation about atomicity wrt pmd. - pte_alloc_map() and pte_alloc_map_lock() are redefined using pte_alloc(). [sudeep.holla@arm.com: fix build for arm64 hugetlbpage] [sfr@canb.auug.org.au: fix arch/arm/mm/mmu.c some more] Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17tile: query dynamic DEBUG_PAGEALLOC settingJoonsoo Kim1-4/+7
We can disable debug_pagealloc processing even if the code is compiled with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query whether it is enabled or not in runtime. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Takashi Iwai <tiwai@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17Merge branch 'next' of ↵Linus Torvalds2-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security layer updates from James Morris: "There are a bunch of fixes to the TPM, IMA, and Keys code, with minor fixes scattered across the subsystem. IMA now requires signed policy, and that policy is also now measured and appraised" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (67 commits) X.509: Make algo identifiers text instead of enum akcipher: Move the RSA DER encoding check to the crypto layer crypto: Add hash param to pkcs1pad sign-file: fix build with CMS support disabled MAINTAINERS: update tpmdd urls MODSIGN: linux/string.h should be #included to get memcpy() certs: Fix misaligned data in extra certificate list X.509: Handle midnight alternative notation in GeneralizedTime X.509: Support leap seconds Handle ISO 8601 leap seconds and encodings of midnight in mktime64() X.509: Fix leap year handling again PKCS#7: fix unitialized boolean 'want' firmware: change kernel read fail to dev_dbg() KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert KEYS: Reserve an extra certificate symbol for inserting without recompiling modsign: hide openssl output in silent builds tpm_tis: fix build warning with tpm_tis_resume ima: require signed IMA policy ima: measure and appraise the IMA policy itself ima: load policy using path ...
2016-03-16Merge tag 'pci-v4.6-changes' of ↵Linus Torvalds2-7/+0
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "PCI changes for v4.6: Enumeration: - Disable IO/MEM decoding for devices with non-compliant BARs (Bjorn Helgaas) - Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs (Bjorn Helgaas Resource management: - Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED (Bjorn Helgaas) - Don't assign or reassign immutable resources (Bjorn Helgaas) - Don't enable/disable ROM BAR if we're using a RAM shadow copy (Bjorn Helgaas) - Set ROM shadow location in arch code, not in PCI core (Bjorn Helgaas) - Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs (Bjorn Helgaas) - ia64: Use ioremap() instead of open-coded equivalent (Bjorn Helgaas) - ia64: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas) - MIPS: Keep CPU physical (not virtual) addresses in shadow ROM resource (Bjorn Helgaas) - Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY (Bjorn Helgaas) - Don't leak memory if sysfs_create_bin_file() fails (Bjorn Helgaas) - rcar: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi) - designware: Remove PCI_PROBE_ONLY handling (Lorenzo Pieralisi) Virtualization: - Wait for up to 1000ms after FLR reset (Alex Williamson) - Support SR-IOV on any function type (Kelly Zytaruk) - Add ACS quirk for all Cavium devices (Manish Jaggi) AER: - Rename pci_ops_aer to aer_inj_pci_ops (Bjorn Helgaas) - Restore pci_ops pointer while calling original pci_ops (David Daney) - Fix aer_inject error codes (Jean Delvare) - Use dev_warn() in aer_inject (Jean Delvare) - Log actual error causes in aer_inject (Jean Delvare) - Log aer_inject error injections (Jean Delvare) VPD: - Prevent VPD access for buggy devices (Babu Moger) - Move pci_read_vpd() and pci_write_vpd() close to other VPD code (Bjorn Helgaas) - Move pci_vpd_release() from header file to pci/access.c (Bjorn Helgaas) - Remove struct pci_vpd_ops.release function pointer (Bjorn Helgaas) - Rename VPD symbols to remove unnecessary "pci22" (Bjorn Helgaas) - Fold struct pci_vpd_pci22 into struct pci_vpd (Bjorn Helgaas) - Sleep rather than busy-wait for VPD access completion (Bjorn Helgaas) - Update VPD definitions (Hannes Reinecke) - Allow access to VPD attributes with size 0 (Hannes Reinecke) - Determine actual VPD size on first access (Hannes Reinecke) Generic host bridge driver: - Move structure definitions to separate header file (David Daney) - Add pci_host_common_probe(), based on gen_pci_probe() (David Daney) - Expose pci_host_common_probe() for use by other drivers (David Daney) Altera host bridge driver: - Fix altera_pcie_link_is_up() (Ley Foon Tan) Cavium ThunderX host bridge driver: - Add PCIe host driver for ThunderX processors (David Daney) - Add driver for ThunderX-pass{1,2} on-chip devices (David Daney) Freescale i.MX6 host bridge driver: - Add DT bindings to configure PHY Tx driver settings (Justin Waters) - Move imx6_pcie_reset_phy() near other PHY handling functions (Lucas Stach) - Move PHY reset into imx6_pcie_establish_link() (Lucas Stach) - Remove broken Gen2 workaround (Lucas Stach) - Move link up check into imx6_pcie_wait_for_link() (Lucas Stach) Freescale Layerscape host bridge driver: - Add "fsl,ls2085a-pcie" compatible ID (Yang Shi) Intel VMD host bridge driver: - Attach VMD resources to parent domain's resource tree (Jon Derrick) - Set bus resource start to 0 (Keith Busch) Microsoft Hyper-V host bridge driver: - Add fwnode_handle to x86 pci_sysdata (Jake Oshins) - Look up IRQ domain by fwnode_handle (Jake Oshins) - Add paravirtual PCI front-end for Microsoft Hyper-V VMs (Jake Oshins) NVIDIA Tegra host bridge driver: - Add pci_ops.{add,remove}_bus() callbacks (Thierry Reding) - Implement ->{add,remove}_bus() callbacks (Thierry Reding) - Remove unused struct tegra_pcie.num_ports field (Thierry Reding) - Track bus -> CPU mapping (Thierry Reding) - Remove misleading PHYS_OFFSET (Thierry Reding) Renesas R-Car host bridge driver: - Depend on ARCH_RENESAS, not ARCH_SHMOBILE (Simon Horman) Synopsys DesignWare host bridge driver: - ARC: Add PCI support (Joao Pinto) - Add generic dw_pcie_wait_for_link() (Joao Pinto) - Add default link up check if sub-driver doesn't override (Joao Pinto) - Add driver for prototyping kits based on ARC SDP (Joao Pinto) TI Keystone host bridge driver: - Defer probing if devm_phy_get() returns -EPROBE_DEFER (Shawn Lin) Xilinx AXI host bridge driver: - Use of_pci_get_host_bridge_resources() to parse DT (Bharat Kumar Gogada) - Remove dependency on ARM-specific struct hw_pci (Bharat Kumar Gogada) - Don't call pci_fixup_irqs() on Microblaze (Bharat Kumar Gogada) - Update Zynq binding with Microblaze node (Bharat Kumar Gogada) - microblaze: Support generic Xilinx AXI PCIe Host Bridge IP driver (Bharat Kumar Gogada) Xilinx NWL host bridge driver: - Add support for Xilinx NWL PCIe Host Controller (Bharat Kumar Gogada) Miscellaneous: - Check device_attach() return value always (Bjorn Helgaas) - Move pci_set_flags() from asm-generic/pci-bridge.h to linux/pci.h (Bjorn Helgaas) - Remove includes of empty asm-generic/pci-bridge.h (Bjorn Helgaas) - ARM64: Remove generated include of asm-generic/pci-bridge.h (Bjorn Helgaas) - Remove empty asm-generic/pci-bridge.h (Bjorn Helgaas) - Remove includes of asm/pci-bridge.h (Bjorn Helgaas) - Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h (Bjorn Helgaas) - unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition (Bjorn Helgaas) - Cleanup pci/pcie/Kconfig whitespace (Andreas Ziegler) - Include pci/hotplug Kconfig directly from pci/Kconfig (Bjorn Helgaas) - Include pci/pcie/Kconfig directly from pci/Kconfig (Bogicevic Sasa) - frv: Remove stray pci_{alloc,free}_consistent() declaration (Christoph Hellwig) - Move pci_dma_* helpers to common code (Christoph Hellwig) - Add PCI_CLASS_SERIAL_USB_DEVICE definition (Heikki Krogerus) - Add QEMU top-level IDs for (sub)vendor & device (Robin H. Johnson) - Fix broken URL for Dell biosdevname (Naga Venkata Sai Indubhaskar Jupudi)" * tag 'pci-v4.6-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (94 commits) PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition PCI: designware: Add driver for prototyping kits based on ARC SDP PCI: designware: Add default link up check if sub-driver doesn't override PCI: designware: Add generic dw_pcie_wait_for_link() PCI: Cleanup pci/pcie/Kconfig whitespace PCI: Simplify pci_create_attr() control flow PCI: Don't leak memory if sysfs_create_bin_file() fails PCI: Simplify sysfs ROM cleanup PCI: Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY MIPS: Loongson 3: Keep CPU physical (not virtual) addresses in shadow ROM resource MIPS: Loongson 3: Use temporary struct resource * to avoid repetition ia64/PCI: Keep CPU physical (not virtual) addresses in shadow ROM resource ia64/PCI: Use ioremap() instead of open-coded equivalent ia64/PCI: Use temporary struct resource * to avoid repetition PCI: Clean up pci_map_rom() whitespace PCI: Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs PCI: thunder: Add driver for ThunderX-pass{1,2} on-chip devices PCI: thunder: Add PCIe host driver for ThunderX processors PCI: generic: Expose pci_host_common_probe() for use by other drivers PCI: generic: Add pci_host_common_probe(), based on gen_pci_probe() ...
2016-03-15Merge branch 'smp-hotplug-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull cpu hotplug updates from Thomas Gleixner: "This is the first part of the ongoing cpu hotplug rework: - Initial implementation of the state machine - Runs all online and prepare down callbacks on the plugged cpu and not on some random processor - Replaces busy loop waiting with completions - Adds tracepoints so the states can be followed" More detailed commentary on this work from an earlier email: "What's wrong with the current cpu hotplug infrastructure? - Asymmetry The hotplug notifier mechanism is asymmetric versus the bringup and teardown. This is mostly caused by the notifier mechanism. - Largely undocumented dependencies While some notifiers use explicitely defined notifier priorities, we have quite some notifiers which use numerical priorities to express dependencies without any documentation why. - Control processor driven Most of the bringup/teardown of a cpu is driven by a control processor. While it is understandable, that preperatory steps, like idle thread creation, memory allocation for and initialization of essential facilities needs to be done before a cpu can boot, there is no reason why everything else must run on a control processor. Before this patch series, bringup looks like this: Control CPU Booting CPU do preparatory steps kick cpu into life do low level init sync with booting cpu sync with control cpu bring the rest up - All or nothing approach There is no way to do partial bringups. That's something which is really desired because we waste e.g. at boot substantial amount of time just busy waiting that the cpu comes to life. That's stupid as we could very well do preparatory steps and the initial IPI for other cpus and then go back and do the necessary low level synchronization with the freshly booted cpu. - Minimal debuggability Due to the notifier based design, it's impossible to switch between two stages of the bringup/teardown back and forth in order to test the correctness. So in many hotplug notifiers the cancel mechanisms are either not existant or completely untested. - Notifier [un]registering is tedious To [un]register notifiers we need to protect against hotplug at every callsite. There is no mechanism that bringup/teardown callbacks are issued on the online cpus, so every caller needs to do it itself. That also includes error rollback. What's the new design? The base of the new design is a symmetric state machine, where both the control processor and the booting/dying cpu execute a well defined set of states. Each state is symmetric in the end, except for some well defined exceptions, and the bringup/teardown can be stopped and reversed at almost all states. So the bringup of a cpu will look like this in the future: Control CPU Booting CPU do preparatory steps kick cpu into life do low level init sync with booting cpu sync with control cpu bring itself up The synchronization step does not require the control cpu to wait. That mechanism can be done asynchronously via a worker or some other mechanism. The teardown can be made very similar, so that the dying cpu cleans up and brings itself down. Cleanups which need to be done after the cpu is gone, can be scheduled asynchronously as well. There is a long way to this, as we need to refactor the notion when a cpu is available. Today we set the cpu online right after it comes out of the low level bringup, which is not really correct. The proper mechanism is to set it to available, i.e. cpu local threads, like softirqd, hotplug thread etc. can be scheduled on that cpu, and once it finished all booting steps, it's set to online, so general workloads can be scheduled on it. The reverse happens on teardown. First thing to do is to forbid scheduling of general workloads, then teardown all the per cpu resources and finally shut it off completely. This patch series implements the basic infrastructure for this at the core level. This includes the following: - Basic state machine implementation with well defined states, so ordering and prioritization can be expressed. - Interfaces to [un]register state callbacks This invokes the bringup/teardown callback on all online cpus with the proper protection in place and [un]installs the callbacks in the state machine array. For callbacks which have no particular ordering requirement we have a dynamic state space, so that drivers don't have to register an explicit hotplug state. If a callback fails, the code automatically does a rollback to the previous state. - Sysfs interface to drive the state machine to a particular step. This is only partially functional today. Full functionality and therefor testability will be achieved once we converted all existing hotplug notifiers over to the new scheme. - Run all CPU_ONLINE/DOWN_PREPARE notifiers on the booting/dying processor: Control CPU Booting CPU do preparatory steps kick cpu into life do low level init sync with booting cpu sync with control cpu wait for boot bring itself up Signal completion to control cpu In a previous step of this work we've done a full tree mechanical conversion of all hotplug notifiers to the new scheme. The balance is a net removal of about 4000 lines of code. This is not included in this series, as we decided to take a different approach. Instead of mechanically converting everything over, we will do a proper overhaul of the usage sites one by one so they nicely fit into the symmetric callback scheme. I decided to do that after I looked at the ugliness of some of the converted sites and figured out that their hotplug mechanism is completely buggered anyway. So there is no point to do a mechanical conversion first as we need to go through the usage sites one by one again in order to achieve a full symmetric and testable behaviour" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) cpu/hotplug: Document states better cpu/hotplug: Fix smpboot thread ordering cpu/hotplug: Remove redundant state check cpu/hotplug: Plug death reporting race rcu: Make CPU_DYING_IDLE an explicit call cpu/hotplug: Make wait for dead cpu completion based cpu/hotplug: Let upcoming cpu bring itself fully up arch/hotplug: Call into idle with a proper state cpu/hotplug: Move online calls to hotplugged cpu cpu/hotplug: Create hotplug threads cpu/hotplug: Split out the state walk into functions cpu/hotplug: Unpark smpboot threads from the state machine cpu/hotplug: Move scheduler cpu_online notifier to hotplug core cpu/hotplug: Implement setup/removal interface cpu/hotplug: Make target state writeable cpu/hotplug: Add sysfs state interface cpu/hotplug: Hand in target state to _cpu_up/down cpu/hotplug: Convert the hotplugged cpu work to a state machine cpu/hotplug: Convert to a state machine for the control processor cpu/hotplug: Add tracepoints ...
2016-03-15Merge branches 'pci/aer', 'pci/enumeration', 'pci/kconfig', 'pci/misc', ↵Bjorn Helgaas2-7/+0
'pci/virtualization' and 'pci/vpd' into next * pci/aer: PCI/AER: Log aer_inject error injections PCI/AER: Log actual error causes in aer_inject PCI/AER: Use dev_warn() in aer_inject PCI/AER: Fix aer_inject error codes * pci/enumeration: PCI: Fix broken URL for Dell biosdevname * pci/kconfig: PCI: Cleanup pci/pcie/Kconfig whitespace PCI: Include pci/hotplug Kconfig directly from pci/Kconfig PCI: Include pci/pcie/Kconfig directly from pci/Kconfig * pci/misc: PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition PCI: Add QEMU top-level IDs for (sub)vendor & device unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition PCI: Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h PCI: Move pci_dma_* helpers to common code frv/PCI: Remove stray pci_{alloc,free}_consistent() declaration * pci/virtualization: PCI: Wait for up to 1000ms after FLR reset PCI: Support SR-IOV on any function type * pci/vpd: PCI: Prevent VPD access for buggy devices PCI: Sleep rather than busy-wait for VPD access completion PCI: Fold struct pci_vpd_pci22 into struct pci_vpd PCI: Rename VPD symbols to remove unnecessary "pci22" PCI: Remove struct pci_vpd_ops.release function pointer PCI: Move pci_vpd_release() from header file to pci/access.c PCI: Move pci_read_vpd() and pci_write_vpd() close to other VPD code PCI: Determine actual VPD size on first access PCI: Use bitfield instead of bool for struct pci_vpd_pci22.busy PCI: Allow access to VPD attributes with size 0 PCI: Update VPD definitions
2016-03-14dsa: Rename mv88e6123_61_65 to mv88e6123 to be consistentAndrew Lunn2-2/+2
All the drivers support multiple chips, but mv88e6123_61_65 is the only one that reflects this in its naming. Change it to be consistent with the other drivers. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-08PCI: Include pci/hotplug Kconfig directly from pci/KconfigBjorn Helgaas1-3/+0
Include pci/hotplug/Kconfig directly from pci/Kconfig, so arches don't have to source both pci/Kconfig and pci/hotplug/Kconfig. Note that this effectively adds pci/hotplug/Kconfig to the following arches, because they already sourced drivers/pci/Kconfig but they previously did not source drivers/pci/hotplug/Kconfig: alpha arm avr32 frv m68k microblaze mn10300 sparc unicore32 Inspired-by-patch-from: Bogicevic Sasa <brutallesale@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-08PCI: Include pci/pcie/Kconfig directly from pci/KconfigBogicevic Sasa1-1/+0
Include pci/pcie/Kconfig directly from pci/Kconfig, so arches don't have to source both pci/Kconfig and pci/pcie/Kconfig. Note that this effectively adds pci/pcie/Kconfig to the following arches, because they already sourced drivers/pci/Kconfig but they previously did not source drivers/pci/pcie/Kconfig: alpha avr32 blackfin frv m32r m68k microblaze mn10300 parisc sparc unicore32 xtensa [bhelgaas: changelog, source pci/pcie/Kconfig at top of pci/Kconfig, whitespace] Signed-off-by: Sasa Bogicevic <brutallesale@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-07PCI: Move pci_dma_* helpers to common codeChristoph Hellwig1-3/+0
For a long time all architectures implement the pci_dma_* functions using the generic DMA API, and they all use the same header to do so. Move this header, pci-dma-compat.h, to include/linux and include it from the generic pci.h instead of having each arch duplicate this include. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-03-04tile: Fix misspellings in comments.Adam Buchbinder3-18/+18
Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> [plus "uninitalization"]
2016-03-02tile kgdb: fix bug in copy to gdb regs, and optimize memsetChris Metcalf1-4/+4
David Binderman pointed out that we were doing a full memset() of the gdb register buffer and then doing a memcpy() to it that was almost as big. This commit optimizes that by only doing a memset() of the registers that are intended to be zero. While making this change I noticed that we were not copying the link register (LR, number 55) due to a fencepost error in commit f419e6f63c5a ("arch: tile: kernel: kgdb.c: Use memcpy() instead of pointer copy one by one"), and I've corrected that as well. Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-03-01arch/hotplug: Call into idle with a proper stateThomas Gleixner1-1/+1
Let the non boot cpus call into idle with the corresponding hotplug state, so the hotplug core can handle the further bringup. That's a first step to convert the boot side of the hotplugged cpus to do all the synchronization with the other side through the state machine. For now it'll only start the hotplug thread and kick the full bringup of the cpu. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: Rik van Riel <riel@redhat.com> Cc: Rafael Wysocki <rafael.j.wysocki@intel.com> Cc: "Srivatsa S. Bhat" <srivatsa@mit.edu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Tejun Heo <tj@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Turner <pjt@google.com> Link: http://lkml.kernel.org/r/20160226182341.614102639@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-02-10KEYS: CONFIG_KEYS_DEBUG_PROC_KEYS is no longer an optionDavid Howells2-2/+0
CONFIG_KEYS_DEBUG_PROC_KEYS is no longer an option as /proc/keys is now mandatory if the keyrings facility is enabled (it's used by libkeyutils in userspace). The defconfig references were removed with: perl -p -i -e 's/CONFIG_KEYS_DEBUG_PROC_KEYS=y\n//' \ `git grep -l CONFIG_KEYS_DEBUG_PROC_KEYS=y` and the integrity Kconfig fixed by hand. Signed-off-by: David Howells <dhowells@redhat.com> cc: Andreas Ziegler <andreas.ziegler@fau.de> cc: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>
2016-01-30arch: Set IORESOURCE_SYSTEM_RAM flag for System RAMToshi Kani1-3/+8
Set IORESOURCE_SYSTEM_RAM in flags of resource ranges with "System RAM", "Kernel code", "Kernel data", and "Kernel bss". Note that: - IORESOURCE_SYSRAM (i.e. modifier bit) is set in flags when IORESOURCE_MEM is already set. IORESOURCE_SYSTEM_RAM is defined as (IORESOURCE_MEM|IORESOURCE_SYSRAM). - Some archs do not set 'flags' for children nodes, such as "Kernel code". This patch does not change 'flags' in this case. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Toshi Kani <toshi.kani@hp.com> Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mips@linux-mips.org Cc: linux-mm <linux-mm@kvack.org> Cc: linux-parisc@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/1453841853-11383-7-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-20dma-mapping: always provide the dma_map_ops based implementationChristoph Hellwig2-4/+0
Move the generic implementation to <linux/dma-mapping.h> now that all architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now that everyone supports them. [valentinrothberg@gmail.com: remove leftovers in Kconfig] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: David Howells <dhowells@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Helge Deller <deller@gmx.de> Cc: James Hogan <james.hogan@imgtec.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Ley Foon Tan <lftan@altera.com> Cc: Mark Salter <msalter@redhat.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Steven Miao <realmz6@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Joerg Roedel <jroedel@suse.de> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20tile: uninline dma_set_maskChristoph Hellwig2-28/+30
We'll soon merge <asm-generic/dma-mapping-common.h> into <linux/dma-mapping.h> and the reference to dma_capable in the tile dma_set_mask would create a circular dependency. Fix this by moving the implementation out of line. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Joerg Roedel <jroedel@suse.de> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-18Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds1-4/+5
Pull virtio barrier rework+fixes from Michael Tsirkin: "This adds a new kind of barrier, and reworks virtio and xen to use it. Plus some fixes here and there" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (44 commits) checkpatch: add virt barriers checkpatch: check for __smp outside barrier.h checkpatch.pl: add missing memory barriers virtio: make find_vqs() checkpatch.pl-friendly virtio_balloon: fix race between migration and ballooning virtio_balloon: fix race by fill and leak s390: more efficient smp barriers s390: use generic memory barriers xen/events: use virt_xxx barriers xen/io: use virt_xxx barriers xenbus: use virt_xxx barriers virtio_ring: use virt_store_mb sh: move xchg_cmpxchg to a header by itself sh: support 1 and 2 byte xchg virtio_ring: update weak barriers to use virt_xxx Revert "virtio_ring: Update weak barriers to use dma_wmb/rmb" asm-generic: implement virt_xxx memory barriers x86: define __smp_xxx xtensa: define __smp_xxx tile: define __smp_xxx ...
2016-01-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds23-184/+309
Pull arch/tile updates from Chris Metcalf: "This is a grab bag of changes that includes some NOHZ and context-tracking related changes, some debugging improvements, JUMP_LABEL support, and some fixes for tilepro allmodconfig support. We also remove the now-unused node_has_online_mem() definitions both for tile's asm/topology.h as well as in linux/topology.h itself" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: numa: remove stale node_has_online_mem() define arch/tile: move user_exit() to early kernel entry sequence tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry tile: fix tilepro casts for readl, writel, etc tile: fix a -Wframe-larger-than warning tile: include the syscall number in the backtrace MAINTAINERS: add git URL for tile arch/tile: adopt prepare_exit_to_usermode() model from x86 tile/jump_label: add jump label support for TILE-Gx tile: define a macro ktext_writable_addr to get writable kernel text address
2016-01-18numa: remove stale node_has_online_mem() defineChris Metcalf1-3/+0
This isn't used anywhere, so delete it. Looks like the last usage (in x86-specific code) was removed by Tejun in 2011 in commit bd6709a91a59 ("x86, NUMA: Make 32bit use common NUMA init path"). Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18arch/tile: move user_exit() to early kernel entry sequenceChris Metcalf7-41/+16
This ensures that we always notify context tracking that we have exited from user space no matter how we enter the kernel. It is similar to how arm64 handles context tracking, for example. This allows the removal of all the exception_enter() calls that were added in commit 49e4e15619cd ("tile: support CONTEXT_TRACKING and thus NOHZ_FULL"). Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entryChris Metcalf1-1/+1
This flag value is saved in ptregs and used to decide whether to disable irqs when returning from the kernel. Commit 1168df528fe4 ("tile: don't assume user privilege is zero") performed a bad merge from some KVM-enabled code that had not yet been upstreamed. The only issue with the old code is that we will read the interrupt mask in more conditions than we need to (e.g., coming from user space when user space has the Interrupt Critical Section bit set, or coming from a guest kernel), which is a slow multi-cycle operation. This change saves those few cycles in the common case. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18tile: fix tilepro casts for readl, writel, etcChris Metcalf1-8/+8
Missing parentheses could cause an argument of the form "integer + pointer" to get cast to "(long)integer + pointer" and remain a pointer type, causing compiler warnings. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18tile: fix a -Wframe-larger-than warningChris Metcalf1-1/+1
The warning occurs in setup.c, where it is known that it can't be a problem, but it's still a good idea to silence the warning. The onstack array is converted from an s32 to a u8, which still is plenty of range for the values being managed there. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18tile: include the syscall number in the backtraceChris Metcalf1-9/+8
This information is easily available in the backtrace data and can be helpful when trying to figure out the backtrace, particularly if we're early in kernel entry or late in kernel exit. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18arch/tile: adopt prepare_exit_to_usermode() model from x86Chris Metcalf5-107/+77
This change is a prerequisite change for TASK_ISOLATION but also stands on its own for readability and maintainability. The existing tile do_work_pending() was called in a loop from assembly on the slow path; this change moves the loop into C code as well. For the x86 version see commit c5c46f59e4e7 ("x86/entry: Add new, comprehensible entry and exit handlers written in C"). This change exposes a pre-existing bug on the older tilepro platform; the singlestep processing is done last, but on tilepro (unlike tilegx) we enable interrupts while doing that processing, so we could in theory miss a signal or other asynchronous event. A future change could fix this by breaking the singlestep work into a "prepare" step done in the main loop, and a "trigger" step done after exiting the loop. Since this change is intended as purely a restructuring change, we call out the bug explicitly now, but don't yet fix it. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-15tile, thp: remove infrastructure for handling splitting PMDsKirill A. Shutemov1-10/+0
With new refcounting we don't need to mark PMDs splitting. Let's drop code to handle this. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-13Merge tag 'libnvdimm-for-4.5' of ↵Linus Torvalds1-3/+1
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm updates from Dan Williams: "The bulk of this has appeared in -next and independently received a build success notification from the kbuild robot. The 'for-4.5/block- dax' topic branch was rebased over the weekend to drop the "block device end-of-life" rework that Al would like to see re-implemented with a notifier, and to address bug reports against the badblocks integration. There is pending feedback against "libnvdimm: Add a poison list and export badblocks" received last week. Linda identified some localized fixups that we will handle incrementally. Summary: - Media error handling: The 'badblocks' implementation that originated in md-raid is up-levelled to a generic capability of a block device. This initial implementation is limited to being consulted in the pmem block-i/o path. Later, 'badblocks' will be consulted when creating dax mappings. - Raw block device dax: For virtualization and other cases that want large contiguous mappings of persistent memory, add the capability to dax-mmap a block device directly. - Increased /dev/mem restrictions: Add an option to treat all io-memory as IORESOURCE_EXCLUSIVE, i.e. disable /dev/mem access while a driver is actively using an address range. This behavior is controlled via the new CONFIG_IO_STRICT_DEVMEM option and can be overridden by the existing "iomem=relaxed" kernel command line option. - Miscellaneous fixes include a 'pfn'-device huge page alignment fix, block device shutdown crash fix, and other small libnvdimm fixes" * tag 'libnvdimm-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (32 commits) block: kill disk_{check|set|clear|alloc}_badblocks libnvdimm, pmem: nvdimm_read_bytes() badblocks support pmem, dax: disable dax in the presence of bad blocks pmem: fail io-requests to known bad blocks libnvdimm: convert to statically allocated badblocks libnvdimm: don't fail init for full badblocks list block, badblocks: introduce devm_init_badblocks block: clarify badblocks lifetime badblocks: rename badblocks_free to badblocks_exit libnvdimm, pmem: move definition of nvdimm_namespace_add_poison to nd.h libnvdimm: Add a poison list and export badblocks nfit_test: Enable DSMs for all test NFITs md: convert to use the generic badblocks code block: Add badblock management for gendisks badblocks: Add core badblock management code block: fix del_gendisk() vs blkdev_ioctl crash block: enable dax for raw block devices block: introduce bdev_file_inode() restrict /dev/mem to idle io memory ranges arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug ...
2016-01-12tile: define __smp_xxxMichael S. Tsirkin1-4/+5
This defines __smp_xxx barriers for tile, for use by virtualization. Some smp_xxx barriers are removed as they are defined correctly by asm-generic/barriers.h Note: for 32 bit, keep smp_mb__after_atomic around since it's faster than the generic implementation. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2016-01-11Merge branch 'locking-core-for-linus' of ↵Linus Torvalds1-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "So we have a laundry list of locking subsystem changes: - continuing barrier API and code improvements - futex enhancements - atomics API improvements - pvqspinlock enhancements: in particular lock stealing and adaptive spinning - qspinlock micro-enhancements" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op futex: Cleanup the goto confusion in requeue_pi() futex: Remove pointless put_pi_state calls in requeue() futex: Document pi_state refcounting in requeue code futex: Rename free_pi_state() to put_pi_state() futex: Drop refcount if requeue_pi() acquired the rtmutex locking/barriers, arch: Remove ambiguous statement in the smp_store_mb() documentation lcoking/barriers, arch: Use smp barriers in smp_store_release() locking/cmpxchg, arch: Remove tas() definitions locking/pvqspinlock: Queue node adaptive spinning locking/pvqspinlock: Allow limited lock stealing locking/pvqspinlock: Collect slowpath lock statistics sched/core, locking: Document Program-Order guarantees locking, sched: Introduce smp_cond_acquire() and use it locking/pvqspinlock, x86: Optimize the PV unlock code path locking/qspinlock: Avoid redundant read of next pointer locking/qspinlock: Prefetch the next node cacheline locking/qspinlock: Use _acquire/_release() versions of cmpxchg() & xchg() atomics: Add test for atomic operations with _relaxed variants
2016-01-09arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debugDan Williams1-3/+1
Let all the archs that implement devmem_is_allowed() opt-in to a common definition of CONFIG_STRICT_DEVM in lib/Kconfig.debug. Cc: Kees Cook <keescook@chromium.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [heiko: drop 'default y' for s390] Acked-by: Ingo Molnar <mingo@redhat.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-05tile: provide CONFIG_PAGE_SIZE_64KB etc for tileproChris Metcalf2-9/+10
This allows the build system to know that it can't attempt to configure the Lustre virtual block device, for example, when tilepro is using 64KB pages (as it does by default). The tilegx build already provided those symbols. Previously we required that the tilepro hypervisor be rebuilt with a different hardcoded page size in its headers, and then Linux be rebuilt using the updated hypervisor header. Now we allow each of the hypervisor and Linux to be built independently. We still check at boot time to ensure that the page size provided by the hypervisor matches what Linux expects. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: stable@vger.kernel.org [3.19+]
2016-01-04tile/jump_label: add jump label support for TILE-GxZhigang Lu6-10/+184
Add the arch-specific code to support jump label for TILE-Gx. This code shares NOP instruction with ftrace, so we move it to a common header file. Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com> Signed-off-by: Zhigang Lu <zlu@ezchip.com> Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-04tile: define a macro ktext_writable_addr to get writable kernel text addressZhigang Lu4-4/+14
It is used by kgdb, ftrace, kprobe and jump label, so we factor this out into a helper routine. Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com> Signed-off-by: Zhigang Lu <zlu@ezchip.com> Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-12-04locking/cmpxchg, arch: Remove tas() definitionsDavidlohr Bueso1-2/+0
It seems that commit 5dc12ddee93 ("Remove tas()") missed some files. Correct this and fully drop this macro, for which we should be using cmpxchg() like calls. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <linux-arch@vger.kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: David Howells <dhowells@re hat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Miao <realmz6@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dave@stgolabs.net Link: http://lkml.kernel.org/r/1445975631-17047-2-git-send-email-dave@stgolabs.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-11-23treewide: Remove old email addressPeter Zijlstra1-1/+1
There were still a number of references to my old Red Hat email address in the kernel source. Remove these while keeping the Red Hat copyright notices intact. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-11-09kmap_atomic_to_page() has no users, remove itNicolas Pitre2-13/+0
Removal started in commit 5bbeed12bdc3 ("sparc32: drop unused kmap_atomic_to_page"). Let's do it across the whole tree. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-05mm: mlock: add mlock flags to enable VM_LOCKONFAULT usageEric B Munson1-0/+1
The previous patch introduced a flag that specified pages in a VMA should be placed on the unevictable LRU, but they should not be made present when the area is created. This patch adds the ability to set this state via the new mlock system calls. We add MLOCK_ONFAULT for mlock2 and MCL_ONFAULT for mlockall. MLOCK_ONFAULT will set the VM_LOCKONFAULT modifier for VM_LOCKED. MCL_ONFAULT should be used as a modifier to the two other mlockall flags. When used with MCL_CURRENT, all current mappings will be marked with VM_LOCKED | VM_LOCKONFAULT. When used with MCL_FUTURE, the mm->def_flags will be marked with VM_LOCKED | VM_LOCKONFAULT. When used with both MCL_CURRENT and MCL_FUTURE, all current mappings and mm->def_flags will be marked with VM_LOCKED | VM_LOCKONFAULT. Prior to this patch, mlockall() will unconditionally clear the mm->def_flags any time it is called without MCL_FUTURE. This behavior is maintained after adding MCL_ONFAULT. If a call to mlockall(MCL_FUTURE) is followed by mlockall(MCL_CURRENT), the mm->def_flags will be cleared and new VMAs will be unlocked. This remains true with or without MCL_ONFAULT in either mlockall() invocation. munlock() will unconditionally clear both vma flags. munlockall() unconditionally clears for VMA flags on all VMAs and in the mm->def_flags field. Signed-off-by: Eric B Munson <emunson@akamai.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-10-20Merge tag 'v4.3-rc6' into locking/core, to pick up fixes before applying new ↵Ingo Molnar2-2/+7
changes Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-06word-at-a-time.h: support zero_bytemask() on alpha and tileChris Metcalf1-1/+7
Both alpha and tile needed implementations of zero_bytemask. The alpha version is untested. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-10-06word-at-a-time.h: fix some Kbuild filesChris Metcalf1-1/+0
arch/tile added word-at-a-time.h after the patch that added generic-y entries; the generic-y entry is now stale. arch/h8300 is newer than the generic-y patch for word-at-a-time.h, and needs a generic-y entry. arch/powerpc seems to have gotten a generic-y entry by mistake in the first patch; this change removes it. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-10-06Merge tag 'v4.3-rc4' into locking/core, to pick up fixes before applying new ↵Ingo Molnar3-29/+6
changes Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-04Merge branch 'strscpy' of ↵Linus Torvalds2-29/+5
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile Pull strscpy string copy function implementation from Chris Metcalf. Chris sent this during the merge window, but I waffled back and forth on the pull request, which is why it's going in only now. The new "strscpy()" function is definitely easier to use and more secure than either strncpy() or strlcpy(), both of which are horrible nasty interfaces that have serious and irredeemable problems. strncpy() has a useless return value, and doesn't NUL-terminate an overlong result. To make matters worse, it pads a short result with zeroes, which is a performance disaster if you have big buffers. strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking the insane NUL padding, but having a differently broken return value which returns the original length of the source string. Which means that it will read characters past the count from the source buffer, and you have to trust the source to be properly terminated. It also makes error handling fragile, since the test for overflow is unnecessarily subtle. strscpy() avoids both these problems, guaranteeing the NUL termination (but not excessive padding) if the destination size wasn't zero, and making the overflow condition very obvious by returning -E2BIG. It also doesn't read past the size of the source, and can thus be used for untrusted source data too. So why did I waffle about this for so long? Every time we introduce a new-and-improved interface, people start doing these interminable series of trivial conversion patches. And every time that happens, somebody does some silly mistake, and the conversion patch to the improved interface actually makes things worse. Because the patch is mindnumbing and trivial, nobody has the attention span to look at it carefully, and it's usually done over large swatches of source code which means that not every conversion gets tested. So I'm pulling the strscpy() support because it *is* a better interface. But I will refuse to pull mindless conversion patches. Use this in places where it makes sense, but don't do trivial patches to fix things that aren't actually known to be broken. * 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: use global strscpy() rather than private copy string: provide strscpy() Make asm/word-at-a-time.h available on all architectures
2015-09-28Merge branch 'stable' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile Pull arch/tile bugfix from Chris Metcalf: "This fixes a bug in 'make allmodconfig'" * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: fix build failure
2015-09-28tile: fix build failureSudip Mukherjee1-0/+1
When building with allmodconfig the build was failing with the error: arch/tile/kernel/usb.c:70:1: warning: data definition has no type or storage class [enabled by default] arch/tile/kernel/usb.c:70:1: error: type defaults to 'int' in declaration of 'arch_initcall' [-Werror=implicit-int] arch/tile/kernel/usb.c:70:1: warning: parameter names (without types) in function declaration [enabled by default] arch/tile/kernel/usb.c:63:19: warning: 'tilegx_usb_init' defined but not used [-Wunused-function] Include linux/module.h to resolve the build failure. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2015-09-23atomic, arch: Audit atomic_{read,set}()Peter Zijlstra2-4/+4
This patch makes sure that atomic_{read,set}() are at least {READ,WRITE}_ONCE(). We already had the 'requirement' that atomic_read() should use ACCESS_ONCE(), and most archs had this, but a few were lacking. All are now converted to use READ_ONCE(). And, by a symmetry and general paranoia argument, upgrade atomic_set() to use WRITE_ONCE(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: james.hogan@imgtec.com Cc: linux-kernel@vger.kernel.org Cc: oleg@redhat.com Cc: will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>