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2016-01-20string_helpers: fix precision loss for some inputsJames Bottomley1-20/+43
It was noticed that we lose precision in the final calculation for some inputs. The most egregious example is size=3000 blk_size=1900 in units of 10 should yield 5.70 MB but in fact yields 3.00 MB (oops). This is because the current algorithm doesn't correctly account for all the remainders in the logarithms. Fix this by doing a correct calculation in the remainders based on napier's algorithm. Additionally, now we have the correct result, we have to account for arithmetic rounding because we're printing 3 digits of precision. This means that if the fourth digit is five or greater, we have to round up, so add a section to ensure correct rounding. Finally account for all possible inputs correctly, including zero for block size. Fixes: b9f28d863594c429e1df35a0474d2663ca28b307 Signed-off-by: James Bottomley <JBottomley@Odin.com> Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: <stable@vger.kernel.org> [delay until after 4.4 release] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20./CREDITS: add credit information for Martin KepplingerMartin Kepplinger1-0/+10
Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20scripts/get_maintainer.pl: handle file names beginning with ./Joe Perches1-0/+4
The problem is that get_maintainer.pl doesn't work if you have a ./ prefix on the filename. For example, if you type: ./scripts/get_maintainer.pl -f ./drivers/usb/usb-skeleton.c then the current code only includes LKML and people from the git log, it doesn't include Greg or the linux-usb list. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20misc: ibmasm: fix build errorsRandy Dunlap1-0/+1
Fix build when CONFIG_SERIAL_8250=m and CONFIG_IBM_ASM=y. Fixes these build errors: drivers/built-in.o: In function `ibmasm_remove_one': module.c:(.text+0xf6874): undefined reference to `ibmasm_unregister_uart' drivers/built-in.o: In function `ibmasm_init_one': module.c:(.text+0xf6c37): undefined reference to `ibmasm_register_uart' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Max Asbock <masbock@us.ibm.com> Cc: Vernon Mauery <vernux@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20zsmalloc: fix migrate_zspage-zs_free race conditionJunil Lee1-1/+13
record_obj() in migrate_zspage() does not preserve handle's HANDLE_PIN_BIT, set by find_aloced_obj()->trypin_tag(), and implicitly (accidentally) un-pins the handle, while migrate_zspage() still performs an explicit unpin_tag() on the that handle. This additional explicit unpin_tag() introduces a race condition with zs_free(), which can pin that handle by this time, so the handle becomes un-pinned. Schematically, it goes like this: CPU0 CPU1 migrate_zspage find_alloced_obj trypin_tag set HANDLE_PIN_BIT zs_free() pin_tag() obj_malloc() -- new object, no tag record_obj() -- remove HANDLE_PIN_BIT set HANDLE_PIN_BIT unpin_tag() -- remove zs_free's HANDLE_PIN_BIT The race condition may result in a NULL pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 00000000 CPU: 0 PID: 19001 Comm: CookieMonsterCl Tainted: PC is at get_zspage_mapping+0x0/0x24 LR is at obj_free.isra.22+0x64/0x128 Call trace: get_zspage_mapping+0x0/0x24 zs_free+0x88/0x114 zram_free_page+0x64/0xcc zram_slot_free_notify+0x90/0x108 swap_entry_free+0x278/0x294 free_swap_and_cache+0x38/0x11c unmap_single_vma+0x480/0x5c8 unmap_vmas+0x44/0x60 exit_mmap+0x50/0x110 mmput+0x58/0xe0 do_exit+0x320/0x8dc do_group_exit+0x44/0xa8 get_signal+0x538/0x580 do_signal+0x98/0x4b8 do_notify_resume+0x14/0x5c This patch keeps the lock bit in migration path and update value atomically. Signed-off-by: Junil Lee <junil0814.lee@lge.com> Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: <stable@vger.kernel.org> [4.1+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20mm: arch: remove duplicate definitions of MADV_FREEGuenter Roeck4-4/+0
Commits 21f55b018ba5 ("arch/*/include/uapi/asm/mman.h: : let MADV_FREE have same value for all architectures") and ef58978f1eaa ("mm: define MADV_FREE for some arches") both defined MADV_FREE, but did not use the same values. This results in build errors such as ./arch/alpha/include/uapi/asm/mman.h:53:0: error: "MADV_FREE" redefined ./arch/alpha/include/uapi/asm/mman.h:50:0: note: this is the location of the previous definition for the affected architectures. Fixes: 21f55b018ba5 ("arch/*/include/uapi/asm/mman.h: : let MADV_FREE have same value for all architectures") Fixes: ef58978f1eaa ("mm: define MADV_FREE for some arches") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: Chen Gang <gang.chen.5i5j@gmail.com> Cc: Minchan Kim <minchan@kernel.org> Acked-by: Helge Deller <deller@gmx.de> [parisc] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20fs/proc/task_mmu.c: add workaround for old compilersKirill A. Shutemov1-1/+1
For THP=n, HPAGE_PMD_NR in smaps_account() expands to BUILD_BUG(). That's fine since this codepath is eliminated by modern compilers. But older compilers have not that efficient dead code elimination. It causes problem at least with gcc 4.1.2 on m68k: fs/built-in.o: In function `smaps_account': task_mmu.c:(.text+0x4f8fa): undefined reference to `__compiletime_assert_471' Let's replace HPAGE_PMD_NR with 1 << compound_order(page). Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20thp: fix interrupt unsafe locking in split_huge_page()Kirill A. Shutemov1-4/+5
split_queue_lock can be taken from interrupt context in some cases, but I forgot to convert locking in split_huge_page() to interrupt-safe primitives. Let's fix this. lockdep output: ====================================================== [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ] 4.4.0+ #259 Tainted: G W ------------------------------------------------------ syz-executor/18183 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: (split_queue_lock){+.+...}, at: free_transhuge_page+0x24/0x90 mm/huge_memory.c:3436 and this task is already holding: (slock-AF_INET){+.-...}, at: spin_lock_bh include/linux/spinlock.h:307 (slock-AF_INET){+.-...}, at: lock_sock_fast+0x45/0x120 net/core/sock.c:2462 which would create a new lock dependency: (slock-AF_INET){+.-...} -> (split_queue_lock){+.+...} but this new dependency connects a SOFTIRQ-irq-safe lock: (slock-AF_INET){+.-...} ... which became SOFTIRQ-irq-safe at: mark_irqflags kernel/locking/lockdep.c:2799 __lock_acquire+0xfd8/0x4700 kernel/locking/lockdep.c:3162 lock_acquire+0x1dc/0x430 kernel/locking/lockdep.c:3585 __raw_spin_lock include/linux/spinlock_api_smp.h:144 _raw_spin_lock+0x33/0x50 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:302 udp_queue_rcv_skb+0x781/0x1550 net/ipv4/udp.c:1680 flush_stack+0x50/0x330 net/ipv6/udp.c:799 __udp4_lib_mcast_deliver+0x694/0x7f0 net/ipv4/udp.c:1798 __udp4_lib_rcv+0x17dc/0x23e0 net/ipv4/udp.c:1888 udp_rcv+0x21/0x30 net/ipv4/udp.c:2108 ip_local_deliver_finish+0x2b3/0xa50 net/ipv4/ip_input.c:216 NF_HOOK_THRESH include/linux/netfilter.h:226 NF_HOOK include/linux/netfilter.h:249 ip_local_deliver+0x1c4/0x2f0 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:498 ip_rcv_finish+0x5ec/0x1730 net/ipv4/ip_input.c:365 NF_HOOK_THRESH include/linux/netfilter.h:226 NF_HOOK include/linux/netfilter.h:249 ip_rcv+0x963/0x1080 net/ipv4/ip_input.c:455 __netif_receive_skb_core+0x1620/0x2f80 net/core/dev.c:4154 __netif_receive_skb+0x2a/0x160 net/core/dev.c:4189 netif_receive_skb_internal+0x1b5/0x390 net/core/dev.c:4217 napi_skb_finish net/core/dev.c:4542 napi_gro_receive+0x2bd/0x3c0 net/core/dev.c:4572 e1000_clean_rx_irq+0x4e2/0x1100 drivers/net/ethernet/intel/e1000e/netdev.c:1038 e1000_clean+0xa08/0x24a0 drivers/net/ethernet/intel/e1000/e1000_main.c:3819 napi_poll net/core/dev.c:5074 net_rx_action+0x7eb/0xdf0 net/core/dev.c:5139 __do_softirq+0x26a/0x920 kernel/softirq.c:273 invoke_softirq kernel/softirq.c:350 irq_exit+0x18f/0x1d0 kernel/softirq.c:391 exiting_irq ./arch/x86/include/asm/apic.h:659 do_IRQ+0x86/0x1a0 arch/x86/kernel/irq.c:252 ret_from_intr+0x0/0x20 arch/x86/entry/entry_64.S:520 arch_safe_halt ./arch/x86/include/asm/paravirt.h:117 default_idle+0x52/0x2e0 arch/x86/kernel/process.c:304 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:295 default_idle_call+0x48/0xa0 kernel/sched/idle.c:92 cpuidle_idle_call kernel/sched/idle.c:156 cpu_idle_loop kernel/sched/idle.c:252 cpu_startup_entry+0x554/0x710 kernel/sched/idle.c:300 rest_init+0x192/0x1a0 init/main.c:412 start_kernel+0x678/0x69e init/main.c:683 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:195 x86_64_start_kernel+0x158/0x167 arch/x86/kernel/head64.c:184 to a SOFTIRQ-irq-unsafe lock: (split_queue_lock){+.+...} which became SOFTIRQ-irq-unsafe at: mark_irqflags kernel/locking/lockdep.c:2817 __lock_acquire+0x146e/0x4700 kernel/locking/lockdep.c:3162 lock_acquire+0x1dc/0x430 kernel/locking/lockdep.c:3585 __raw_spin_lock include/linux/spinlock_api_smp.h:144 _raw_spin_lock+0x33/0x50 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:302 split_huge_page_to_list+0xcc0/0x1c50 mm/huge_memory.c:3399 split_huge_page include/linux/huge_mm.h:99 queue_pages_pte_range+0xa38/0xef0 mm/mempolicy.c:507 walk_pmd_range mm/pagewalk.c:50 walk_pud_range mm/pagewalk.c:90 walk_pgd_range mm/pagewalk.c:116 __walk_page_range+0x653/0xcd0 mm/pagewalk.c:204 walk_page_range+0xfe/0x2b0 mm/pagewalk.c:281 queue_pages_range+0xfb/0x130 mm/mempolicy.c:687 migrate_to_node mm/mempolicy.c:1004 do_migrate_pages+0x370/0x4e0 mm/mempolicy.c:1109 SYSC_migrate_pages mm/mempolicy.c:1453 SyS_migrate_pages+0x640/0x730 mm/mempolicy.c:1374 entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(split_queue_lock); local_irq_disable(); lock(slock-AF_INET); lock(split_queue_lock); <Interrupt> lock(slock-AF_INET); Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: David Rientjes <rientjes@google.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>
2016-01-20lib/libcrc32c.c: fix build warningJean Delvare1-0/+1
Fix the following build warning: lib/libcrc32c.c:42:5: warning: no previous prototype for "crc32c" [-Wmissing-prototypes] u32 crc32c(u32 crc, const void *address, unsigned int length) ^ Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20Merge tag 'dmaengine-fix-4.5-rc1' of ↵Linus Torvalds4-32/+30
git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine fixes from Vinod Koul: "Here is my second pull request for this window: A few driver fixes have piled up and one missed rcar bindings patch which got somehow lost in for-linus branch so cherry-picked that one. Fixes are for dw, at_hdmac, edma" * tag 'dmaengine-fix-4.5-rc1' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: rcar-dmac: Document SoC specific bindings dmaengine: at_xdmac: fix resume for cyclic transfers dmaengine: dw: fix cyclic transfer callbacks dmaengine: dw: fix cyclic transfer setup dmaengine: edma: Fix paRAM slot allocation for entry channel 0
2016-01-20Merge branch 'misc' of ↵Linus Torvalds8-124/+188
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull misc kbuild updates from Michal Marek: - Fix for make O=... perf-tar* - make tags revamp and fix for the fallout. Patch for warnings about line breaks inside DEFINE_PER_CPU macros is pending - New coccinelle test * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: coccinelle: tests: unsigned value cannot be lesser than zero tags: Unify emacs and exuberant rules tags: Drop the _PE rule tags: Do not try to index defconfigs tags: Process Kconfig files in a single pass tags: Fix erroneous pattern match in a comment aic7xxx: Avoid name collision with <linux/list.h> tags: Treat header files as C code package Makefile: fix perf-tar targets when outdir is set scripts/tags.sh: Teach tags about more powerpc macros
2016-01-20Merge branch 'kconfig' of ↵Linus Torvalds3-4/+7
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kconfig updates from Michal Marek: - Fix for make xconfig segfault - Handle long strings in config symbol values - Fix for mixing boolean and kconfig ternary type * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kconfig: fix qconf segfault by deleting heap objects kconfig: return 'false' instead of 'no' in bool function kconfig: allow kconfig to handle longer path names
2016-01-20Merge branch 'kbuild' of ↵Linus Torvalds14-20/+35
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild updates from Michal Marek: - Make <modname>-m in makefiles work like <modname>-y and fix the fallout - Minor genksyms fix - Fix race with make -j install modules_install - Move -Wsign-compare from make W=1 to W=2 - Other minor fixes * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: Demote 'sign-compare' warning to W=2 Makefile: revert "Makefile: Document ability to make file.lst and file.S" partially kbuild: Do not run modules_install and install in paralel genksyms: Handle string literals with spaces in reference files fixdep: constify strrcmp arguments ath10k: Fix build with CONFIG_THERMAL=m Revert "drm: Hack around CONFIG_AGP=m build failures" kbuild: Allow to specify composite modules with modname-m staging/ad7606: Actually build the interface modules
2016-01-20FRV: Mark architecture orphanedDavid Howells1-2/+1
Mark the FRV architecture orphaned in the MAINTAINERS file. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20MAINTAINERS: Update mailing list for Renesas SoC DevelopmentSimon Horman1-8/+8
Update the mailing list used for development of support for Renesas SoCs and related drivers. Up until now the linux-sh mailing list has been used, however, Renesas SoCs are now much wider than the SH architecture and there is some desire from some for the linux-sh list to refocus on discussion of the work on the SH architecture. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Magnus Damm <damm@opensource.se> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Rich Felker <dalias@libc.org> Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-20mm: avoid uninitialized variable in tracepointArnd Bergmann1-1/+1
A newly added tracepoint in the hugepage code uses a variable in the error handling that is not initialized at that point: include/trace/events/huge_memory.h:81:230: error: 'isolated' may be used uninitialized in this function [-Werror=maybe-uninitialized] The result is relatively harmless, as the trace data will in rare cases contain incorrect data. This works around the problem by adding an explicit initialization. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 7d2eba0557c1 ("mm: add tracepoint for scanning pages") Reviewed-by: Ebru Akagunduz <ebru.akagunduz@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-19Merge tag 'platform-drivers-x86-v4.5-1' of ↵Linus Torvalds22-111/+4580
git://git.infradead.org/users/dvhart/linux-platform-drivers-x86 Pull x86 platform driver updates from Darren Hart: "Add intel punit and telemetry driver for APL SoCs. Add intel-hid driver for various laptop hotkey support. Add asus-wireless radio control driver. Keyboard backlight support/improvements for ThinkPads, Vaio, and Toshiba. Several hotkey related fixes and improvements for dell and toshiba. Fix oops on dual GPU Macs in apple-gmux. A few new device IDs and quirks. Various minor config related build issues and cleanups. surface pro 4: - fix compare_const_fl.cocci warnings - Add support for Surface Pro 4 Buttons platform/x86: - Add Intel Telemetry Debugfs interfaces - Add Intel telemetry platform device - Add Intel telemetry platform driver - Add Intel Telemetry Core Driver - add NULL check for input parameters - add Intel P-Unit mailbox IPC driver - update acpi resource structure for Punit thinkpad_acpi: - Add support for keyboard backlight dell-wmi: - Process only one event on devices with interface version 0 - Check if Dell WMI descriptor structure is valid - Improve unknown hotkey handling - Use a C99-style array for bios_to_linux_keycode tc1100-wmi: - fix build warning when CONFIG_PM not enabled asus-wireless: - Add ACPI HID ATK4001 - Add Asus Wireless Radio Control driver asus-wmi: - drop to_platform_driver macro intel-hid: - new hid event driver for hotkeys sony-laptop: - Keyboard backlight control for some Vaio Fit models ideapad-laptop: - Add Lenovo ideapad Y700-17ISK to no_hw_rfkill dmi list apple-gmux: - Assign apple_gmux_data before registering toshiba_acpi: - Add rfkill dependency to ACPI_TOSHIBA entry - Fix keyboard backlight sysfs entries not being updated - Add WWAN RFKill support - Add support for WWAN devices - Fix blank screen at boot if transflective backlight is supported - Propagate the hotkey value via genetlink toshiba_bluetooth: - Add missing newline in toshiba_bluetooth_present function" * tag 'platform-drivers-x86-v4.5-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (29 commits) surface pro 4: fix compare_const_fl.cocci warnings surface pro 4: Add support for Surface Pro 4 Buttons platform:x86: Add Intel Telemetry Debugfs interfaces platform:x86: Add Intel telemetry platform device platform:x86: Add Intel telemetry platform driver platform/x86: Add Intel Telemetry Core Driver intel_punit_ipc: add NULL check for input parameters thinkpad_acpi: Add support for keyboard backlight dell-wmi: Process only one event on devices with interface version 0 dell-wmi: Check if Dell WMI descriptor structure is valid tc1100-wmi: fix build warning when CONFIG_PM not enabled asus-wireless: Add ACPI HID ATK4001 platform/x86: Add Asus Wireless Radio Control driver asus-wmi: drop to_platform_driver macro intel-hid: new hid event driver for hotkeys Keyboard backlight control for some Vaio Fit models platform/x86: Add rfkill dependency to ACPI_TOSHIBA entry platform:x86: add Intel P-Unit mailbox IPC driver intel_pmc_ipc: update acpi resource structure for Punit ideapad-laptop: Add Lenovo ideapad Y700-17ISK to no_hw_rfkill dmi list ...
2016-01-19surface pro 4: fix compare_const_fl.cocci warningsJulia Lawall1-1/+1
Move constants to the right of binary operators. Generated by: scripts/coccinelle/misc/compare_const_fl.cocci CC: Weng Xuetian <wengxt@gmail.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19surface pro 4: Add support for Surface Pro 4 ButtonsWeng Xuetian2-6/+8
Surface Pro 4 buttons are managed by a device with _HID "MSHW0040" different from Surface Pro 3. This commit adds MSHW0040 to id list to support the Surface Pro 4. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=109871 Signed-off-by: Weng Xuetian <wengxt@gmail.com> Acked-by: Chen Yu <yu.c.chen@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform:x86: Add Intel Telemetry Debugfs interfacesSouvik Kumar Chakravarty3-1/+1033
This implements debugfs interfaces for reading the telemetry samples from SSRAM and configuring firmware trace verbosity. Interface created under /sys/kernel/debug/telemetry soc_states: SoC Device and Low Power States pss_info: Info from the Primary SubSystem ioss_info: Info from IO SubSusytem pss_trace_verbosity: Read/Modify PSS F/W trace verbosity ioss_trace_verbosity: Read/Modify IOSS F/W trace verbosity. Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform:x86: Add Intel telemetry platform deviceSouvik Kumar Chakravarty1-0/+96
Telemetry Device is created by the pmc_ipc driver. Resources are populated according SSRAM region as indicated by the BIOS tables. Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform:x86: Add Intel telemetry platform driverSouvik Kumar Chakravarty3-1/+1209
Telemetry platform driver implements the telemetry interfaces. Currently it supports ApolloLake. It uses the PUNIT and PMC IPC interfaces to configure the telemetry samples to read. The samples are read from a Secure SRAM region. Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform/x86: Add Intel Telemetry Core DriverSouvik Kumar Chakravarty5-0/+630
Intel PM Telemetry is a software mechanism via which various SoC PM and performance related parameters like PM counters, firmware trace verbosity, the status of different devices inside the SoC, etc. can be monitored and analyzed. The different samples that may be monitored can be configured at runtime via exported APIs. This patch adds the telemetry core driver that implements basic exported APIs. Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19intel_punit_ipc: add NULL check for input parametersQipeng Zha1-6/+10
intel_punit_ipc_command() maybe called when in or out data pointers are NULL. Signed-off-by: Qipeng Zha <qipeng.zha@intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19thinkpad_acpi: Add support for keyboard backlightPali Rohár1-0/+206
This patch adds support for controlling keyboard backlight via standard linux led class interface (::kbd_backlight). It uses ACPI HKEY device with MLCG and MLCS methods. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Tested-by: Fabio D'Urso <fabiodurso@hotmail.it> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19dell-wmi: Process only one event on devices with interface version 0Pali Rohár1-0/+16
BIOS/ACPI on devices with WMI interface version 0 does not clear buffer before filling it. So next time when BIOS/ACPI send WMI event which is smaller as previous then it contains garbage in buffer from previous event. BIOS/ACPI on devices with WMI interface version 1 clears buffer and sometimes send more events in buffer at one call. Since commit 83fc44c32ad8 ("dell-wmi: Update code for processing WMI events") dell-wmi process all events in buffer (and not just first). To prevent reading garbage from the buffer we process only the first event on devices with WMI interface version 0. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Tested-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19dell-wmi: Check if Dell WMI descriptor structure is validPali Rohár1-2/+78
After examining existing DSDT ACPI tables of more laptops and looking into Dell WMI document mentioned in ML dicussion archived at http://www.spinics.net/lists/platform-driver-x86/msg07220.html we will parse and check WMI descriptor if contains expected data. It is because WMI descriptor contains interface version number and it is needed to know in next commit. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Tested-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19tc1100-wmi: fix build warning when CONFIG_PM not enabledColin Ian King1-0/+2
Conditionally declare suspend_data on CONFIG_PM to avoid the following warning when CONFIG_OM is not enabled: drivers/platform/x86/tc1100-wmi.c:55:27: warning: 'suspend_data' defined but not used [-Wunused-variable] Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19asus-wireless: Add ACPI HID ATK4001João Paulo Rechi Vita1-0/+1
As reported in https://bugzilla.kernel.org/show_bug.cgi?id=98931#c22 in the Asus UX31A the Asus Wireless Radio Control device (ASHS) uses the HID "ATK4001". Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com> Reported-by: Tasev Nikola <tasev.stefanoska@skynet.be> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform/x86: Add Asus Wireless Radio Control driverJoão Paulo Rechi Vita4-0/+104
Some Asus notebooks like the Asus E202SA and the Asus X555UB have a separate ACPI device for notifications from the airplane mode hotkey. This device is called "Wireless Radio Control" in Asus websites and ASHS in the DSDT, and its ACPI _HID is ATK4002 in the two models mentioned above. For these models, when the airplane mode hotkey (Fn+F2) is pressed, a query 0x0B is started in the Embedded Controller, and all this query does is a notify ASHS with the value 0x88 (for acpi_osi >= "Windows 2012"): Scope (_SB.PCI0.SBRG.EC0) { (...) Method (_Q0B, 0, NotSerialized) // _Qxx: EC Query { If ((MSOS () >= OSW8)) { Notify (ASHS, 0x88) // Device-Specific } Else { (...) } } } Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19asus-wmi: drop to_platform_driver macroGeliang Tang1-3/+0
to_platform_driver has been defined in platform_device.h, so drop this repetitive macro in asus-wmi.c. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19intel-hid: new hid event driver for hotkeysAlex Hung4-0/+308
This driver supports various HID events including hotkeys. Dell XPS 13 9350 requires it for the wireless hotkey. Signed-off-by: Alex Hung <alex.hung@canonical.com> Reviewed-and-tested-by: Andy Lutomirski <luto@kernel.org> [dvhart: Kconfig help typo fix and INPUT_SPARSEKMAP fix from Sedat Dilek] Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19Merge branch 'for-linus' of ↵Linus Torvalds2-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem update from James Morris: "A CVE fix and a maintainers file update" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: KEYS: Fix keyring ref leak in join_session_keyring() Fix the MAINTAINERS record for the certs/ directory
2016-01-20KEYS: Fix keyring ref leak in join_session_keyring()Yevgeny Pats1-0/+1
This fixes CVE-2016-0728. If a thread is asked to join as a session keyring the keyring that's already set as its session, we leak a keyring reference. This can be tested with the following program: #include <stddef.h> #include <stdio.h> #include <sys/types.h> #include <keyutils.h> int main(int argc, const char *argv[]) { int i = 0; key_serial_t serial; serial = keyctl(KEYCTL_JOIN_SESSION_KEYRING, "leaked-keyring"); if (serial < 0) { perror("keyctl"); return -1; } if (keyctl(KEYCTL_SETPERM, serial, KEY_POS_ALL | KEY_USR_ALL) < 0) { perror("keyctl"); return -1; } for (i = 0; i < 100; i++) { serial = keyctl(KEYCTL_JOIN_SESSION_KEYRING, "leaked-keyring"); if (serial < 0) { perror("keyctl"); return -1; } } return 0; } If, after the program has run, there something like the following line in /proc/keys: 3f3d898f I--Q--- 100 perm 3f3f0000 0 0 keyring leaked-keyring: empty with a usage count of 100 * the number of times the program has been run, then the kernel is malfunctioning. If leaked-keyring has zero usages or has been garbage collected, then the problem is fixed. Reported-by: Yevgeny Pats <yevgeny@perception-point.io> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Don Zickus <dzickus@redhat.com> Acked-by: Prarit Bhargava <prarit@redhat.com> Acked-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-01-19Keyboard backlight control for some Vaio Fit modelsMattia Dongili1-20/+45
SVF1521P6EW, SVF1521DCXW, SVF13N1L2ES and likely most SVF*. do not expose separate timeout controls in auto mode. Signed-off-by: Dominik Matta <dominik@matta.sk> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform/x86: Add rfkill dependency to ACPI_TOSHIBA entryAzael Avalos1-0/+1
Commit 2fdde83443aa ("toshiba_acpi: Add WWAN RFKill support") added WWAN rfkill support to the driver, but the KConfig entry was not updated to add the RFKill dependency, causing a broken build if RFKill is not selected. This patch adds the RFKILL dependency to the KConfig entry, fixing the build issue. Signed-off-by: Azael Avalos <coproscefalo@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19platform:x86: add Intel P-Unit mailbox IPC driverQipeng Zha5-1/+449
This driver provides support for P-Unit mailbox IPC on Intel platforms. The heart of the P-Unit is the Foxton microcontroller and its firmware, which provide mailbox interface for power management usage. Signed-off-by: Qipeng Zha <qipeng.zha@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19intel_pmc_ipc: update acpi resource structure for PunitQipeng Zha1-40/+78
BIOS restructure exported memory resources for Punit in acpi table, So update resources for Punit. Signed-off-by: Qipeng Zha <qipeng.zha@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19ideapad-laptop: Add Lenovo ideapad Y700-17ISK to no_hw_rfkill dmi listJosh Boyer1-0/+7
One of the newest ideapad models also lacks a physical hw rfkill switch, and trying to read the hw rfkill switch through the ideapad module causes it to always reported blocking breaking wifi. Fix it by adding this model to the DMI list. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1286293 Cc: stable@vger.kernel.org Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19dell-wmi: Improve unknown hotkey handlingAndy Lutomirski1-4/+20
If DMI lists a hotkey that we don't recognize, log and ignore it instead of trying to map it to keycode 0. I haven't seen this happen, but it will help maintain the key map in the future and it will help avoid sending bogus events. This also improves the message that we log when we get an unknown key event. Signed-off-by: Andy Lutomirski <luto@kernel.org> Reviewed-by: Pali Rohár <pali.rohar@gmail.com> [dvhart: remove BUILD_BUG_ON per mutual agreement on list] Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19apple-gmux: Assign apple_gmux_data before registeringMatthew Garrett1-4/+6
Registering the handler after both GPUs will trigger a DDC switch for connector reprobing. This will oops if apple_gmux_data hasn't already been assigned. Reorder the code to do that. [Lukas: More generally, this commit fixes a race condition that is triggered by invoking a handler callback between the call to vga_switcheroo_register_handler() and the assignment of apple_gmux_data.] Tested-by: Pierre Moreau <pierre.morrow@free.fr> [MBP 5,3 2009 nvidia MCP79 + G96 pre-retina 15"] Tested-by: Paul Hordiienko <pvt.gord@gmail.com> [MBP 6,2 2010 intel ILK + nvidia GT216 pre-retina 15"] Tested-by: Lukas Wunner <lukas@wunner.de> [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"] Tested-by: William Brown <william@blackhats.net.au> [MBP 8,2 2011 intel SNB + amd turks pre-retina 15"] Tested-by: Bruno Bierbaumer <bruno@bierbaumer.net> [MBP 11,3 2013 intel HSW + nvidia GK107 retina 15"] Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com> Reviewed-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19toshiba_acpi: Fix keyboard backlight sysfs entries not being updatedAzael Avalos1-4/+43
Certain Toshiba models with the second generation keyboard backlight (type 2) do not generate the keyboard backlight changed event (0x92), and thus, the sysfs entries are never being updated. This patch adds a workquee and a global boolean variable to address the issue. For those models that do generate the event, the sysfs entries are being updated via the *notify function and the boolean is set to true to avoid a second call to update the entries. For those models that do not generate the event, the workquee is used to update the sysfs entries and also to emulate the event via netlink, to make userspace aware of such change. Signed-off-by: Azael Avalos <coproscefalo@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2016-01-19Merge branch 'for-4.5/core' of git://git.kernel.dk/linux-blockLinus Torvalds17-64/+79
Pull core block updates from Jens Axboe: "We don't have a lot of core changes this time around, it's mostly in drivers, which will come in a subsequent pull. The cores changes include: - blk-mq - Prep patch from Christoph, changing blk_mq_alloc_request() to take flags instead of just using gfp_t for sleep/nosleep. - Doc patch from me, clarifying the difference between legacy and blk-mq for timer usage. - Fixes from Raghavendra for memory-less numa nodes, and a reuse of CPU masks. - Cleanup from Geliang Tang, using offset_in_page() instead of open coding it. - From Ilya, rename request_queue slab to it reflects what it holds, and a fix for proper use of bdgrab/put. - A real fix for the split across stripe boundaries from Keith. We yanked a broken version of this from 4.4-rc final, this one works. - From Mike Krinkin, emit a trace message when we split. - From Wei Tang, two small cleanups, not explicitly clearing memory that is already cleared" * 'for-4.5/core' of git://git.kernel.dk/linux-block: block: use bd{grab,put}() instead of open-coding block: split bios to max possible length block: add call to split trace point blk-mq: Avoid memoryless numa node encoded in hctx numa_node blk-mq: Reuse hardware context cpumask for tags blk-mq: add a flags parameter to blk_mq_alloc_request Revert "blk-flush: Queue through IO scheduler when flush not required" block: clarify blk_add_timer() use case for blk-mq bio: use offset_in_page macro block: do not initialise statics to 0 or NULL block: do not initialise globals to 0 or NULL block: rename request_queue slab cache
2016-01-19Merge tag 'iommu-updates-v4.5' of ↵Linus Torvalds17-1050/+411
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU updates from Joerg Roedel: "The updates include: - Small code cleanups in the AMD IOMMUv2 driver - Scalability improvements for the DMA-API implementation of the AMD IOMMU driver. This is just a starting point, but already showed some good improvements in my tests. - Removal of the unused Renesas IPMMU/IPMMUI driver - Updates for ARM-SMMU include: * Some fixes to get the driver working nicely on Broadcom hardware * A change to the io-pgtable API to indicate the unit in which to flush (all callers converted, with Ack from Laurent) * Use of devm_* for allocating/freeing the SMMUv3 buffers - Some other small fixes and improvements for other drivers" * tag 'iommu-updates-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (46 commits) iommu/vt-d: Fix up error handling in alloc_iommu iommu/vt-d: Check the return value of iommu_device_create() iommu/amd: Remove an unneeded condition iommu/amd: Preallocate dma_ops apertures based on dma_mask iommu/amd: Use trylock to aquire bitmap_lock iommu/amd: Make dma_ops_domain->next_index percpu iommu/amd: Relax locking in dma_ops path iommu/amd: Initialize new aperture range before making it visible iommu/amd: Build io page-tables with cmpxchg64 iommu/amd: Allocate new aperture ranges in dma_ops_alloc_addresses iommu/amd: Optimize dma_ops_free_addresses iommu/amd: Remove need_flush from struct dma_ops_domain iommu/amd: Iterate over all aperture ranges in dma_ops_area_alloc iommu/amd: Flush iommu tlb in dma_ops_free_addresses iommu/amd: Rename dma_ops_domain->next_address to next_index iommu/amd: Remove 'start' parameter from dma_ops_area_alloc iommu/amd: Flush iommu tlb in dma_ops_aperture_alloc() iommu/amd: Retry address allocation within one aperture iommu/amd: Move aperture_range.offset to another cache-line iommu/amd: Add dma_ops_aperture_alloc() function ...
2016-01-19Merge branches 's390', 'arm/renesas', 'arm/msm', 'arm/shmobile', 'arm/smmu', ↵Joerg Roedel17-1050/+411
'x86/amd' and 'x86/vt-d' into next
2016-01-19Fix the MAINTAINERS record for the certs/ directoryDavid Howells1-1/+2
Fix the MAINTAINERS record for the certs/ directory to have the new keyrings mailing list and also to be authoritative for the sign-file tool Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-01-18Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds44-319/+401
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 Torvalds25-188/+310
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
2016-01-18Merge branch 'for-linus' of ↵Linus Torvalds6-32/+51
git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32 Pull AVR32 updates from Hans-Christian Noren Egtvedt. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32: mmc: atmel: get rid of struct mci_dma_data mmc: atmel-mci: restore dma on AVR32 avr32: wire up missing syscalls avr32: wire up accept4 syscall
2016-01-18Merge branch 'for-linus-4.5' of ↵Linus Torvalds47-829/+3690
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs updates from Chris Mason: "This has our usual assortment of fixes and cleanups, but the biggest change included is Omar Sandoval's free space tree. It's not the default yet, mounting -o space_cache=v2 enables it and sets a readonly compat bit. The tree can actually be deleted and regenerated if there are any problems, but it has held up really well in testing so far. For very large filesystems (30T+) our existing free space caching code can end up taking a huge amount of time during commits. The new tree based code is faster and less work overall to update as the commit progresses. Omar worked on this during the summer and we'll hammer on it in production here at FB over the next few months" * 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (73 commits) Btrfs: fix fitrim discarding device area reserved for boot loader's use Btrfs: Check metadata redundancy on balance btrfs: statfs: report zero available if metadata are exhausted btrfs: preallocate path for snapshot creation at ioctl time btrfs: allocate root item at snapshot ioctl time btrfs: do an allocation earlier during snapshot creation btrfs: use smaller type for btrfs_path locks btrfs: use smaller type for btrfs_path lowest_level btrfs: use smaller type for btrfs_path reada btrfs: cleanup, use enum values for btrfs_path reada btrfs: constify static arrays btrfs: constify remaining structs with function pointers btrfs tests: replace whole ops structure for free space tests btrfs: use list_for_each_entry* in backref.c btrfs: use list_for_each_entry_safe in free-space-cache.c btrfs: use list_for_each_entry* in check-integrity.c Btrfs: use linux/sizes.h to represent constants btrfs: cleanup, remove stray return statements btrfs: zero out delayed node upon allocation btrfs: pass proper enum type to start_transaction() ...
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