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2015-12-03net/mlx5: E-Switch, Introduce FDB hardware capabilitiesSaeed Mahameed
Define needed hardware structures and capabilities needed for E-Switch FDB flow tables and read them on driver load. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Introducing E-Switch and l2 tableSaeed Mahameed
E-Switch is the software entity that represents and manages ConnectX4 inter-HCA ethernet l2 switching. E-Switch has its own Virtual Ports, each Vport/vNIC/VF can be connected to the device through a vport of an e-switch. Each e-switch is managed by one vNIC identified by HCA_CAP.vport_group_manager (usually it is the PF/vport[0]), and its main responsibility is to forward each packet to the right vport. e-Switch needs to manage its own l2-table and FDB tables. L2 table is a flow table that is managed by FW, it is needed for Multi-host (Multi PF) configuration for inter HCA switching between PFs. FDB table is a flow table that is totally managed by e-Switch driver, its main responsibility is to switch packets between e-Swtich internal vports and uplink vport that belong to the same. This patch introduces only e-Swtich l2 table management, FDB managemnt will come later when ethernet SRIOV/VFs will be enabled. preperation for ethernet sriov and l2 table management. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Introduce access functions to modify/query vport vlansSaeed Mahameed
Those functions are needed to notify the upcoming L2 table and SR-IOV E-Switch(FDB) manager(PF), of the NIC vport (vf) vlan table changes. preperation for ethernet sriov and l2 table management. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Introduce access functions to modify/query vport promisc modeSaeed Mahameed
Those functions are needed to notify the upcoming SR-IOV E-Switch(FDB) manager(PF), of the NIC vport (vf) promisc mode changes. Preperation for ethernet sriov and l2 table management. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Introduce access functions to modify/query vport stateSaeed Mahameed
In preparation for SR-IOV we add here an API to enable each e-switch manager (PF) to configure its VFs link states in e-switch preparation for ethernet sriov. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Introduce access functions to modify/query vport mac listsSaeed Mahameed
Those functions are needed to notify the upcoming L2 table and SR-IOV E-Switch(FDB) manager(PF), of the NIC vport (vf) UC/MC mac lists changes. preperation for ethernet sriov and l2 table management. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Update access functions to Query/Modify vport MAC addressSaeed Mahameed
In preparation for SR-IOV we add here an API to enable each e-switch client (PF/VF) to configure its L2 MAC addresses and for the e-switch manager (usually the PF) to access them in order to be able to configure them into the e-switch. Therefore we now pass vport num parameter to mlx5_query_nic_vport_context, so PF can access other vports contexts. preperation for ethernet sriov and l2 table management. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5: Add HW capabilities and structs for SR-IOV E-SwitchSaeed Mahameed
Update HCA capabilities and HW struct to include needed capabilities for upcoming Ethernet Switch (SR-IOV E-Switch). Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net/mlx5_core: Add base sriov supportEli Cohen
This patch adds SRIOV base support for mlx5 supported devices. The same driver is used for both PFs and VFs; VFs are identified by the driver through the flag MLX5_PCI_DEV_IS_VF added to the pci table entries. Virtual functions are created as usual through writing a value to the sriov_numvs sysfs file of the PF device. Upon instantiating VFs, they will all be probed by the driver on the hypervisor. One can gracefully unbind them through /sys/bus/pci/drivers/mlx5_core/unbind. mlx5_wait_for_vf_pages() was added to ensure that when a VF dies without executing proper teardown, the hypervisor driver waits till all of the pages that were allocated at the hypervisor to maintain its operation are returned. In order for the VF to be operational, the PF needs to call enable_hca for it. This can be done before the VFs are created through a call to pci_enable_sriov. If the there are VFs assigned to a VMs when the driver of the PF is unloaded, all the VF will experience system error and PF driver unloads cleanly; in this case pci_disable_sriov is not called and the devices will show when running lspci. Once the PF driver is reloaded, it will sync its data structures which maintain state on its VFs. Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: introduce lower state changed info structure for LAG lowersJiri Pirko
This is shared info structure for bonding and team. Serves to pass down info about link state and port activity to notification listeners. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: introduce change lower state notifierJiri Pirko
When lower device like bonding slave, team/bridge port, etc changes its state, it is useful for others to notice this change. Currently this is implemented specificly for bonding as NETDEV_BONDING_INFO notifier. This patch aims to replace this specific usage and make this more generic to be used for all upper-lower devices. Introduce NETDEV_CHANGELOWERSTATE netdev notifier type and netdev_lower_state_changed() helper. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03team: fill-up LAG changeupper info struct and pass it alongJiri Pirko
Initialize netdev_lag_upper_info structure by TX type according to current team mode and pass it along via netdev_master_upper_dev_link. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add info struct for LAG changeupperJiri Pirko
This struct will be shared by bonding and team to pass internal information to notifier listeners. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add possibility to pass information about upper device via notifierJiri Pirko
Sometimes the drivers and other code would find it handy to know some internal information about upper device being changed. So allow upper-code to pass information down to notifier listeners during linking. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: propagate upper priv via netdev_master_upper_dev_linkJiri Pirko
Eliminate netdev_master_upper_dev_link_private and pass priv directly as a parameter of netdev_master_upper_dev_link. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add netif_is_lag_port helperJiri Pirko
Some code does not mind if a device is bond slave or team port and treats them the same, as generic LAG ports. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add netif_is_lag_master helperJiri Pirko
Some code does not mind if the master is bond or team and treats them the same, as generic LAG. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add netif_is_team_port helperJiri Pirko
Similar to other helpers, caller can use this to find out if device is team port. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03net: add netif_is_team_master helperJiri Pirko
Similar to other helpers, caller can use this to find out if device is team master. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03blk-integrity: empty implementation when disabledKeith Busch
This patch moves the blk_integrity_payload definition outside the CONFIG_BLK_DEV_INTERITY dependency and provides empty function implementations when the kernel configuration disables integrity extensions. This simplifies drivers that make use of these to map user data so they don't need to repeat the same configuration checks. Signed-off-by: Keith Busch <keith.busch@intel.com> Updated by Jens to pass an error pointer return from bio_integrity_alloc(), otherwise if CONFIG_BLK_DEV_INTEGRITY isn't set, we return a weird ENOMEM from __nvme_submit_user_cmd() if a meta buffer is set. Signed-off-by: Jens Axboe <axboe@fb.com>
2015-12-03soc: ti: Add wkup_m3_ipc driverDave Gerlach
Introduce a wkup_m3_ipc driver to handle communication between the MPU and Cortex M3 wkup_m3 present on am335x. This driver is responsible for actually booting the wkup_m3_rproc and also handling all IPC which is done using the IPC registers in the control module, a mailbox, and a separate interrupt back from the wkup_m3. A small API is exposed for executing specific power commands, which include configuring for low power mode, request a transition to a low power mode, and status info on a previous transition. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-12-03cgroup: kill cgrp_ss_priv[CGROUP_CANFORK_COUNT] and friendsOleg Nesterov
Now that nobody use the "priv" arg passed to can_fork/cancel_fork/fork we can kill CGROUP_CANFORK_COUNT/SUBSYS_TAG/etc and cgrp_ss_priv[] in copy_process(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2015-12-03Merge branch 'for-4.4-fixes' into for-4.5Tejun Heo
2015-12-03cgroup: fix handling of multi-destination migration from subtree_control ↵Tejun Heo
enabling Consider the following v2 hierarchy. P0 (+memory) --- P1 (-memory) --- A \- B P0 has memory enabled in its subtree_control while P1 doesn't. If both A and B contain processes, they would belong to the memory css of P1. Now if memory is enabled on P1's subtree_control, memory csses should be created on both A and B and A's processes should be moved to the former and B's processes the latter. IOW, enabling controllers can cause atomic migrations into different csses. The core cgroup migration logic has been updated accordingly but the controller migration methods haven't and still assume that all tasks migrate to a single target css; furthermore, the methods were fed the css in which subtree_control was updated which is the parent of the target csses. pids controller depends on the migration methods to move charges and this made the controller attribute charges to the wrong csses often triggering the following warning by driving a counter negative. WARNING: CPU: 1 PID: 1 at kernel/cgroup_pids.c:97 pids_cancel.constprop.6+0x31/0x40() Modules linked in: CPU: 1 PID: 1 Comm: systemd Not tainted 4.4.0-rc1+ #29 ... ffffffff81f65382 ffff88007c043b90 ffffffff81551ffc 0000000000000000 ffff88007c043bc8 ffffffff810de202 ffff88007a752000 ffff88007a29ab00 ffff88007c043c80 ffff88007a1d8400 0000000000000001 ffff88007c043bd8 Call Trace: [<ffffffff81551ffc>] dump_stack+0x4e/0x82 [<ffffffff810de202>] warn_slowpath_common+0x82/0xc0 [<ffffffff810de2fa>] warn_slowpath_null+0x1a/0x20 [<ffffffff8118e031>] pids_cancel.constprop.6+0x31/0x40 [<ffffffff8118e0fd>] pids_can_attach+0x6d/0xf0 [<ffffffff81188a4c>] cgroup_taskset_migrate+0x6c/0x330 [<ffffffff81188e05>] cgroup_migrate+0xf5/0x190 [<ffffffff81189016>] cgroup_attach_task+0x176/0x200 [<ffffffff8118949d>] __cgroup_procs_write+0x2ad/0x460 [<ffffffff81189684>] cgroup_procs_write+0x14/0x20 [<ffffffff811854e5>] cgroup_file_write+0x35/0x1c0 [<ffffffff812e26f1>] kernfs_fop_write+0x141/0x190 [<ffffffff81265f88>] __vfs_write+0x28/0xe0 [<ffffffff812666fc>] vfs_write+0xac/0x1a0 [<ffffffff81267019>] SyS_write+0x49/0xb0 [<ffffffff81bcef32>] entry_SYSCALL_64_fastpath+0x12/0x76 This patch fixes the bug by removing @css parameter from the three migration methods, ->can_attach, ->cancel_attach() and ->attach() and updating cgroup_taskset iteration helpers also return the destination css in addition to the task being migrated. All controllers are updated accordingly. * Controllers which don't care whether there are one or multiple target csses can be converted trivially. cpu, io, freezer, perf, netclassid and netprio fall in this category. * cpuset's current implementation assumes that there's single source and destination and thus doesn't support v2 hierarchy already. The only change made by this patchset is how that single destination css is obtained. * memory migration path already doesn't do anything on v2. How the single destination css is obtained is updated and the prep stage of mem_cgroup_can_attach() is reordered to accomodate the change. * pids is the only controller which was affected by this bug. It now correctly handles multi-destination migrations and no longer causes counter underflow from incorrect accounting. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-and-tested-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Cc: Aleksa Sarai <cyphar@cyphar.com>
2015-12-03EDAC: Add DDR4 flagJim Snow
Make EDAC aware of DDR4/RDDR4 mem types. Signed-off-by: Jim Snow <jim.m.snow@intel.com> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: linux-edac <linux-edac@vger.kernel.org> Cc: lukasz.anaczkowski@intel.com Link: http://lkml.kernel.org/r/1449136134-23706-2-git-send-email-hubert.chrzaniuk@intel.com [ Rebase to 4.4-rc3. ] Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de>
2015-12-02hv_netvsc: Don't ask for additional head room in the skbKY Srinivasan
The rndis header is 116 bytes big and can be placed in the default head room that will be available in the skb. Since the netvsc packet is less than 48 bytes, we can use the skb control buffer for the netvsc packet. With these changes we don't need to ask for additional head room. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-02ipv6: add complete rcu protection around np->optEric Dumazet
This patch addresses multiple problems : UDP/RAW sendmsg() need to get a stable struct ipv6_txoptions while socket is not locked : Other threads can change np->opt concurrently. Dmitry posted a syzkaller (http://github.com/google/syzkaller) program desmonstrating use-after-free. Starting with TCP/DCCP lockless listeners, tcp_v6_syn_recv_sock() and dccp_v6_request_recv_sock() also need to use RCU protection to dereference np->opt once (before calling ipv6_dup_options()) This patch adds full RCU protection to np->opt Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-02cpufreq: use last policy after online for drivers with ->setpolicySrinivas Pandruvada
For cpufreq drivers which use setpolicy interface, after offline->online the policy is set to default. This can be reproduced by setting the default policy of intel_pstate or longrun to ondemand and then change to "performance". After offline and online, the setpolicy will be called with the policy=ondemand. For drivers using governors this condition is handled by storing last_governor, during offline and restoring during online. The same should be done for drivers using setpolicy interface. Storing last_policy during offline and restoring during online. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-12-02ACPI / property: fix compile error for acpi_node_get_property_reference() ↵Hanjun Guo
when CONFIG_ACPI=n In commit 60ba032ed76e ("ACPI / property: Drop size_prop from acpi_dev_get_property_reference()"), the argument "const char *cells_name" was dropped, but forgot to update the stub function in no-ACPI case, it will lead to compile error when CONFIG_ACPI=n, easliy remove "const char *cells_name" to fix it. Fixes: 60ba032ed76e "ACPI / property: Drop size_prop from acpi_dev_get_property_reference()" Reported-by: Kejian Yan <yankejian@huawei.com> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-12-01usb: core: lpm: remove usb3_lpm_enabled in usb_deviceLu Baolu
Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-01usb: core: lpm: fix usb3_hardware_lpm sysfs nodeLu Baolu
Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM") introduced usb3_hardware_lpm sysfs node. This doesn't show the correct status of USB3 U1 and U2 LPM status. This patch fixes this by replacing usb3_hardware_lpm with two nodes, usb3_hardware_lpm_u1 (for U1) and usb3_hardware_lpm_u2 (for U2), and recording the U1/U2 LPM status in right places. This patch should be back-ported to kernels as old as 4.3, that contains Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM"). Cc: stable@vger.kernel.org Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-01USB: constify usb_mon_operations structureJulia Lawall
The usb_mon_operations structure is never modified, so declare it as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-01ARM/clocksource: use automatic DT probing for ux500 PRCMULinus Walleij
The ARM core kernel already calls clocksource_of_init() so why go to all the trouble of locating and probing this node in the machine. CLOCKSOURCE_OF_DECLARE() will take care of it in the clocksource driver, and thus we can also get rid of the dangling header file <linux/clksrc-dbx500-prcmu.h> Suggested-by: Arnd Bergmann <arndb@linaro.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-12-01qed: Add support for changing LED stateSudarsana Kalluru
Physical LEDs are being controlled by the management FW. This adds the qed functionality required to request management FW to change the LED configuration, as well as the necessary APIs for this functionality to later be used by the protocol drivers. Signed-off-by: Sudarsana Kalluru <Sudarsana.Kalluru@qlogic.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01ARM: s3c64xx: use new adc/touchscreen driverArnd Bergmann
The old ADC and touchscreen drivers are not compatible with multiplatform support, but we can use the exynos-adc driver as a replacement. This changes the common device creation functions for s3c64xx (but not s3c24xx for now) to use the new driver. To do this, we have to pass the interrupt resources in the opposite order and pass the platform data in the adc device node. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-12-01net: fix sock_wake_async() rcu protectionEric Dumazet
Dmitry provided a syzkaller (http://github.com/google/syzkaller) triggering a fault in sock_wake_async() when async IO is requested. Said program stressed af_unix sockets, but the issue is generic and should be addressed in core networking stack. The problem is that by the time sock_wake_async() is called, we should not access the @flags field of 'struct socket', as the inode containing this socket might be freed without further notice, and without RCU grace period. We already maintain an RCU protected structure, "struct socket_wq" so moving SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA into it is the safe route. It also reduces number of cache lines needing dirtying, so might provide a performance improvement anyway. In followup patches, we might move remaining flags (SOCK_NOSPACE, SOCK_PASSCRED, SOCK_PASSSEC) to save 8 bytes and let 'struct socket' being mostly read and let it being shared between cpus. Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01net: rename SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATAEric Dumazet
This patch is a cleanup to make following patch easier to review. Goal is to move SOCK_ASYNC_NOSPACE and SOCK_ASYNC_WAITDATA from (struct socket)->flags to a (struct socket_wq)->flags to benefit from RCU protection in sock_wake_async() To ease backports, we rename both constants. Two new helpers, sk_set_bit(int nr, struct sock *sk) and sk_clear_bit(int net, struct sock *sk) are added so that following patch can change their implementation. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01clk: mmp: stop using platform headersArnd Bergmann
The mmp clock drivers currently hardcode the physical addresses for the clock registers. This is generally a bad idea, and it also gets in the way of multiplatform builds, which make the platform header files inaccessible to device drivers. To work around the header file problem, this patch changes the calling convention so the three mmp clock drivers get initialized with the base addresses as arguments from the platform code. It would still be useful to have a larger rework of the clock drivers, with DT integration to let the clocks actually be probed automatically, and the base addresses passed as DT properties. I am unsure if anyone is still interested in the mmp platform, so it is possible that this won't happen. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Mike Turquette <mturquette@linaro.org> Cc: Chao Xie <chao.xie@marvell.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
2015-12-01mtd: nand: fix typo (t_ald -> t_adl)Brian Norris
It's "ADL" ("ALE to data loading" time) not "ALD". Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-01mtd: nand: fix ONFI parameter page layoutBoris BREZILLON
src_ssync_features field is only 1 byte large, and the 4th reserved area is actually 8 bytes large. Fixes: d1e1f4e42b5 ("mtd: nand: add support for reading ONFI parameters from NAND device") Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-01vfs: add copy_file_range syscall and vfs helperZach Brown
Add a copy_file_range() system call for offloading copies between regular files. This gives an interface to underlying layers of the storage stack which can copy without reading and writing all the data. There are a few candidates that should support copy offloading in the nearer term: - btrfs shares extent references with its clone ioctl - NFS has patches to add a COPY command which copies on the server - SCSI has a family of XCOPY commands which copy in the device This system call avoids the complexity of also accelerating the creation of the destination file by operating on an existing destination file descriptor, not a path. Currently the high level vfs entry point limits copy offloading to files on the same mount and super (and not in the same file). This can be relaxed if we get implementations which can copy between file systems safely. Signed-off-by: Zach Brown <zab@redhat.com> [Anna Schumaker: Change -EINVAL to -EBADF during file verification, Change flags parameter from int to unsigned int, Add function to include/linux/syscalls.h, Check copy len after file open mode, Don't forbid ranges inside the same file, Use rw_verify_area() to veriy ranges, Use file_out rather than file_in, Add COPY_FR_REFLINK flag] Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-12-01spi: Uninline spi_unregister_device()Geert Uytterhoeven
Uninline spi_unregister_device() in preparation of adding more code to it. Add kerneldoc documentation while we're at it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-01nvme: use offset instead of a struct for registersChristoph Hellwig
This makes life easier for future non-PCI drivers where access to the registers might be more complicated. Note that Linux drivers are pretty evenly split between the two versions, and in fact the NVMe driver already uses offsets for the doorbells. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> [Fixed CMBSZ offset] Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-12-01blk-mq: add a flags parameter to blk_mq_alloc_requestChristoph Hellwig
We already have the reserved flag, and a nowait flag awkwardly encoded as a gfp_t. Add a real flags argument to make the scheme more extensible and allow for a nicer calling convention. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-12-01Merge tag 'iio-for-4.5a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: First set of new device support, features and cleanups for IIO in the 4.5 cycle Usual mixed bag, but the big item perhaps in this series is the DMA buffer support added by Lars-Peter Clausen. It's been in the works for a long time and it will be interesting to see what hardware support shows up now that this is available. New core features + associate cleanup. * Add generic DMA buffer infrastructure * Add a DMAengine framework based buffer Also associated minor changes. - Set the device buffer watermark based on the minimum watermark for all attached buffers rather than just the 'primary' one. - iio_buffer_init - only set the watermark default if one hasn't already been provided. This allows simple support for devices with a fixed watermark. - read only attribute for watermark on fixed watermark devices. - add explicit buffer enable/disable callbacks to allow the buffer to do more than trivial actions when it is being turned on and off. * IIO_VAL_INT support in write_raw_get_fmt function. New device support * Freescale MMA7455/7456L accelerometers * Memsic MXC6255XC accelerometer * ST lis2dh12 accelerometer * TI ADS8688 ADC * TI Palamas (twl6035/7) gpadc New driver features * mma8452 - support either of the available interrupt pins to cope with the case where board layout has lead to a particular one being connected. Staging graduation * Dummy driver - this driver acts as both an example and a test device for those with out hardware to develop userspace code against. Cleanups and minor bits and bobs. * treewide - Sort out the ordering of iio_device_register/unregister vs runtime pm function calls so that it's all nice and consistent and not race prone. - Check sscanf return values. None of the cases will actually happen as the strings are supplied internally, but best to be consistent on this. * ad7780 - switch over to the gpio descriptor interface and remove the now unused platform data which gets rid of a header entirely. * ad7793 - drop a pointless else statement. * at91_adc - Swap kmalloc_array in for a kmalloc doing the same job. * dummy - get rid of some commented out lines that snuck in during the move of the driver. * lm3533-als - Print an error message on provision of an invalid resistance. * mcp320x - Add compatible strings with vendor prefix and deprecate those with no vendor prefix. * mxs-lradc - Use BIT macro in various places rather than shifted ones. * pa12203001 - Power off the chip if the registration fails. * pulsedlight-lidar-lite - add runtime PM support. * xilinx XADC - constify an iio_buffer_setup_ops structure.
2015-12-01regmap: Fix leftover from struct reg_default to struct reg_sequence changeDaniel Wagner
In 8019ff6cfc04 ("regmap: Use reg_sequence for multi_reg_write / register_patch") struct reg_default was renamed to struct reg_secquence, which missed one place to fix up. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-30mtd: cfi: don't warn about broken geometry for !CONFIG_MTDArnd Bergmann
The linux/mtd/map.h header file is included by a couple of platform specific files that are built even when CONFIG_MTD is disabled, and we always get warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work" in that case. This adds an #ifdef around the pointless warning, as everything is really fine when we don't build the drivers anyway. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30net: ipmr: move pimsm_enabled to pim.h and renameNikolay Aleksandrov
Move the inline pimsm_enabled() to pim.h and rename it to ipmr_pimsm_enabled to show it's for the ipv4 ipmr code since pim.h is used by IPv6 too. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-30net: ipmr: move struct mr_table and VIF_EXISTS to mroute.hNikolay Aleksandrov
Move the definitions of VIF_EXISTS() and struct mr_table to mroute.h Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-30net: ipmr: adjust mroute.h style and drop externNikolay Aleksandrov
Remove extra spaces and tabs, adjust function definitions, remove an unnecessary ifdef (already used below, just move code) and drop extern from the functions. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>