1. 26 Mar, 2019 1 commit
  2. 24 Mar, 2019 14 commits
    • Linus Torvalds's avatar
      Linux 5.1-rc2 · 8c2ffd91
      Linus Torvalds authored
      8c2ffd91
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 17403fa2
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "Miscellaneous ext4 bug fixes for 5.1"
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: prohibit fstrim in norecovery mode
        ext4: cleanup bh release code in ext4_ind_remove_space()
        ext4: brelse all indirect buffer in ext4_ind_remove_space()
        ext4: report real fs size after failed resize
        ext4: add missing brelse() in add_new_gdb_meta_bg()
        ext4: remove useless ext4_pin_inode()
        ext4: avoid panic during forced reboot
        ext4: fix data corruption caused by unaligned direct AIO
        ext4: fix NULL pointer dereference while journal is aborted
      17403fa2
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 231c807a
      Linus Torvalds authored
      Pull scheduler updates from Thomas Gleixner:
       "Third more careful attempt for this set of fixes:
      
         - Prevent a 32bit math overflow in the cpufreq code
      
         - Fix a buffer overflow when scanning the cgroup2 cpu.max property
      
         - A set of fixes for the NOHZ scheduler logic to prevent waking up
           CPUs even if the capacity of the busy CPUs is sufficient along with
           other tweaks optimizing the behaviour for asymmetric systems
           (big/little)"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Skip LLC NOHZ logic for asymmetric systems
        sched/fair: Tune down misfit NOHZ kicks
        sched/fair: Comment some nohz_balancer_kick() kick conditions
        sched/core: Fix buffer overflow in cgroup2 property cpu.max
        sched/cpufreq: Fix 32-bit math overflow
      231c807a
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 49ef0156
      Linus Torvalds authored
      Pull perf updates from Thomas Gleixner:
       "A larger set of perf updates.
      
        Not all of them are strictly fixes, but that's solely the tip
        maintainers fault as they let the timely -rc1 pull request fall
        through the cracks for various reasons including travel. So I'm
        sending this nevertheless because rebasing and distangling fixes and
        updates would be a mess and risky as well. As of tomorrow, a strict
        fixes separation is happening again. Sorry for the slip-up.
      
        Kernel:
      
         - Handle RECORD_MMAP vs. RECORD_MMAP2 correctly so different
           consumers of the mmap event get what they requested.
      
        Tools:
      
         - A larger set of updates to perf record/report/scripts vs. time
           stamp handling
      
         - More Python3 fixups
      
         - A pile of memory leak plumbing
      
         - perf BPF improvements and fixes
      
         - Finalize the perf.data directory storage"
      
      [ Note: the kernel part is strictly a fix, the updates are purely to
        tooling       - Linus ]
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
        perf bpf: Show more BPF program info in print_bpf_prog_info()
        perf bpf: Extract logic to create program names from perf_event__synthesize_one_bpf_prog()
        perf tools: Save bpf_prog_info and BTF of new BPF programs
        perf evlist: Introduce side band thread
        perf annotate: Enable annotation of BPF programs
        perf build: Check what binutils's 'disassembler()' signature to use
        perf bpf: Process PERF_BPF_EVENT_PROG_LOAD for annotation
        perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO
        perf feature detection: Add -lopcodes to feature-libbfd
        perf top: Add option --no-bpf-event
        perf bpf: Save BTF information as headers to perf.data
        perf bpf: Save BTF in a rbtree in perf_env
        perf bpf: Save bpf_prog_info information as headers to perf.data
        perf bpf: Save bpf_prog_info in a rbtree in perf_env
        perf bpf: Make synthesize_bpf_events() receive perf_session pointer instead of perf_tool
        perf bpf: Synthesize bpf events with bpf_program__get_prog_info_linear()
        bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump()
        tools lib bpf: Introduce bpf_program__get_prog_info_linear()
        perf record: Replace option --bpf-event with --no-bpf-event
        perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test()
        ...
      49ef0156
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 19caf581
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of x86 fixes:
      
         - Prevent potential NULL pointer dereferences in the HPET and HyperV
           code
      
         - Exclude the GART aperture from /proc/kcore to prevent kernel
           crashes on access
      
         - Use the correct macros for Cyrix I/O on Geode processors
      
         - Remove yet another kernel address printk leak
      
         - Announce microcode reload completion as requested by quite some
           people. Microcode loading has become popular recently.
      
         - Some 'Make Clang' happy fixlets
      
         - A few cleanups for recently added code"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/gart: Exclude GART aperture from kcore
        x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
        x86/mm/pti: Make local symbols static
        x86/cpu/cyrix: Remove {get,set}Cx86_old macros used for Cyrix processors
        x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors
        x86/microcode: Announce reload operation's completion
        x86/hyperv: Prevent potential NULL pointer dereference
        x86/hpet: Prevent potential NULL pointer dereference
        x86/lib: Fix indentation issue, remove extra tab
        x86/boot: Restrict header scope to make Clang happy
        x86/mm: Don't leak kernel addresses
        x86/cpufeature: Fix various quality problems in the <asm/cpu_device_hd.h> header
      19caf581
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a75eda7b
      Linus Torvalds authored
      Pull timer fixes from Thomas Gleixner:
       "A set of small fixes plus the removal of stale board support code:
      
         - Remove the board support code from the clpx711x clocksource driver.
           This change had fallen through the cracks and I'm sending it now
           rather than dealing with people who want to improve that stale code
           for 3 month.
      
         - Use the proper clocksource mask on RICSV
      
         - Make local scope functions and variables static"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        clocksource/drivers/clps711x: Remove board support
        clocksource/drivers/riscv: Fix clocksource mask
        clocksource/drivers/mips-gic-timer: Make gic_compare_irqaction static
        clocksource/drivers/timer-ti-dm: Make omap_dm_timer_set_load_start() static
        clocksource/drivers/tcb_clksrc: Make tc_clksrc_suspend/resume() static
        clocksource/drivers/clps711x: Make clps711x_clksrc_init() static
        time/jiffies: Make refined_jiffies static
      a75eda7b
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f6cc519b
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "Two small fixes:
      
         - Cure a recently introduces error path hickup which tries to
           unregister a not registered lockdep key in te workqueue code
      
         - Prevent unaligned cmpxchg() crashes in the robust list handling
           code by sanity checking the user space supplied futex pointer"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        futex: Ensure that futex address is aligned in handle_futex_death()
        workqueue: Only unregister a registered lockdep key
      f6cc519b
    • Linus Torvalds's avatar
      Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e08fef88
      Linus Torvalds authored
      Pull irq fixes from Thomas Gleixner:
       "A set of fixes for the interrupt subsystem:
      
         - Remove secondary GIC support on systems w/o device-tree support
      
         - A set of small fixlets in various irqchip drivers
      
         - static and fall-through annotations
      
         - Kernel doc and typo fixes"
      
      * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        genirq: Mark expected switch case fall-through
        genirq/devres: Remove excess parameter from kernel doc
        irqchip/irq-mvebu-sei: Make mvebu_sei_ap806_caps static
        irqchip/mbigen: Don't clear eventid when freeing an MSI
        irqchip/stm32: Don't set rising configuration registers at init
        irqchip/stm32: Don't clear rising/falling config registers at init
        dt-bindings: irqchip: renesas-irqc: Document r8a774c0 support
        irqchip/mmp: Make mmp_irq_domain_ops static
        irqchip/brcmstb-l2: Make two init functions static
        genirq: Fix typo in comment of IRQD_MOVE_PCNTXT
        irqchip/gic-v3-its: Fix comparison logic in lpi_range_cmp
        irqchip/gic: Drop support for secondary GIC in non-DT systems
        irqchip/imx-irqsteer: Fix of_property_read_u32() error handling
      e08fef88
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1ebf5afb
      Linus Torvalds authored
      Pull core fixes from Thomas Gleixner:
       "Two small fixes:
      
         - Move the large objtool_file struct off the stack so objtool works
           in setups with a tight stack limit.
      
         - Make a few variables static in the watchdog core code"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        watchdog/core: Make variables static
        objtool: Move objtool_file struct off the stack
      1ebf5afb
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 9fc13bbd
      Linus Torvalds authored
      Pull thermal management fixes from Zhang Rui:
      
       - Fix a wrong __percpu structure declaration in intel_powerclamp driver
         (Luc Van Oostenryck)
      
       - Fix truncated name of the idle injection kthreads created by
         intel_powerclamp driver (Zhang Rui)
      
       - Fix the missing UUID supports in int3400 thermal driver (Matthew
         Garrett)
      
       - Fix a crash when accessing the debugfs of bcm2835 SoC thermal driver
         (Phil Elwell)
      
       - A couple of trivial fixes/cleanups in some SoC thermal drivers
      
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        thermal/intel_powerclamp: fix truncated kthread name
        thermal: mtk: Allocate enough space for mtk_thermal.
        thermal/int340x_thermal: fix mode setting
        thermal/int340x_thermal: Add additional UUIDs
        thermal: cpu_cooling: Remove unused cur_freq variable
        thermal: bcm2835: Fix crash in bcm2835_thermal_debugfs
        thermal: samsung: Fix incorrect check after code merge
        thermal/intel_powerclamp: fix __percpu declaration of worker_data
      9fc13bbd
    • Linus Torvalds's avatar
      Merge tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 · 38104c00
      Linus Torvalds authored
      Pull smb3 fixes from Steve French:
      
       - two fixes for stable for guest mount problems with smb3.1.1
      
       - two fixes for crediting (SMB3 flow control) on resent requests
      
       - a byte range lock leak fix
      
       - two fixes for incorrect rc mappings
      
      * tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: update internal module version number
        SMB3: Fix SMB3.1.1 guest mounts to Samba
        cifs: Fix slab-out-of-bounds when tracing SMB tcon
        cifs: allow guest mounts to work for smb3.11
        fix incorrect error code mapping for OBJECTID_NOT_FOUND
        cifs: fix that return -EINVAL when do dedupe operation
        CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN
        CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN
      38104c00
    • Linus Torvalds's avatar
      Merge tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux · e0046bb3
      Linus Torvalds authored
      Pull auxdisplay updates from Miguel Ojeda:
       "A few fixes and improvements for auxdisplay:
      
         - Series to fix a memory leak in hd44780 while introducing
           charlcd_free(). From Andy Shevchenko
      
         - Series to clean up the Kconfig menus and a couple of improvements
           for charlcd. From Mans Rullgard"
      
      * tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux:
        auxdisplay: charlcd: make backlight initial state configurable
        auxdisplay: charlcd: simplify init message display
        auxdisplay: deconfuse configuration
        auxdisplay: hd44780: Convert to use charlcd_free()
        auxdisplay: panel: Convert to use charlcd_free()
        auxdisplay: charlcd: Introduce charlcd_free() helper
        auxdisplay: charlcd: Move to_priv() to charlcd namespace
        auxdisplay: hd44780: Fix memory leak on ->remove()
      e0046bb3
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 1fa8109f
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Six fixes to four drivers and two core fixes.
      
        One core fix simply corrects a missed destroy_rcu_head() but the other
        is hopefully the end of an ongoing effort to make suspend/resume play
        nicely with scsi quiesce"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: ibmvscsi: Fix empty event pool access during host removal
        scsi: ibmvscsi: Protect ibmvscsi_head from concurrent modificaiton
        scsi: hisi_sas: Add softreset in hisi_sas_I_T_nexus_reset()
        scsi: qla2xxx: Fix NULL pointer crash due to stale CPUID
        scsi: qla2xxx: Fix FC-AL connection target discovery
        scsi: core: Avoid that a kernel warning appears during system resume
        scsi: core: Also call destroy_rcu_head() for passthrough requests
        scsi: iscsi: flush running unbind operations when removing a session
      1fa8109f
    • Alexander Shiyan's avatar
      clocksource/drivers/clps711x: Remove board support · 2a6a8e2d
      Alexander Shiyan authored
      Since board support for the CLPS711X platform was removed,
      remove the board support from the clps711x-timer driver.
      Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
      Link: https://lkml.kernel.org/r/20181220111626.17140-1-shc_work@mail.ru
      2a6a8e2d
  3. 23 Mar, 2019 17 commits
    • Linus Torvalds's avatar
      Merge tag 'io_uring-20190323' of git://git.kernel.dk/linux-block · 1bdd3dbf
      Linus Torvalds authored
      Pull io_uring fixes and improvements from Jens Axboe:
       "The first five in this series are heavily inspired by the work Al did
        on the aio side to fix the races there.
      
        The last two re-introduce a feature that was in io_uring before it got
        merged, but which I pulled since we didn't have a good way to have
        BVEC iters that already have a stable reference. These aren't
        necessarily related to block, it's just how io_uring pins fixed
        buffers"
      
      * tag 'io_uring-20190323' of git://git.kernel.dk/linux-block:
        block: add BIO_NO_PAGE_REF flag
        iov_iter: add ITER_BVEC_FLAG_NO_REF flag
        io_uring: mark me as the maintainer
        io_uring: retry bulk slab allocs as single allocs
        io_uring: fix poll races
        io_uring: fix fget/fput handling
        io_uring: add prepped flag
        io_uring: make io_read/write return an integer
        io_uring: use regular request ref counts
      1bdd3dbf
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20190323' of git://git.kernel.dk/linux-block · 2335cbe6
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A set of fixes/changes that should go into this series. This contains:
      
         - Kernel doc / comment updates (Bart, Shenghui)
      
         - Un-export of core-only used function (Bart)
      
         - Fix race on loop file access (Dongli)
      
         - pf/pcd queue cleanup fixes (me)
      
         - Use appropriate helper for RESTART bit set (Yufen)
      
         - Use named identifier for classic poll (Yufen)"
      
      * tag 'for-linus-20190323' of git://git.kernel.dk/linux-block:
        sbitmap: trivial - update comment for sbitmap_deferred_clear_bit
        blkcg: Fix kernel-doc warnings
        blk-iolatency: #include "blk.h"
        block: Unexport blk_mq_add_to_requeue_list()
        block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value
        blk-mq: remove unused 'nr_expired' from blk_mq_hw_ctx
        loop: access lo_backing_file only when the loop device is Lo_bound
        blk-mq: use blk_mq_sched_mark_restart_hctx to set RESTART
        paride/pcd: cleanup queues when detection fails
        paride/pf: cleanup queues when detection fails
      2335cbe6
    • Linus Torvalds's avatar
      Merge tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client · 9a1050ad
      Linus Torvalds authored
      Pull ceph fixes from Ilya Dryomov:
       "A follow up for the new alloc_size logic and a blacklisting fix,
        marked for stable"
      
      * tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client:
        rbd: drop wait_for_latest_osdmap()
        libceph: wait for latest osdmap in ceph_monc_blacklist_add()
        rbd: set io_min, io_opt and discard_granularity to alloc_size
      9a1050ad
    • Darrick J. Wong's avatar
      ext4: prohibit fstrim in norecovery mode · 18915b58
      Darrick J. Wong authored
      The ext4 fstrim implementation uses the block bitmaps to find free space
      that can be discarded.  If we haven't replayed the journal, the bitmaps
      will be stale and we absolutely *cannot* use stale metadata to zap the
      underlying storage.
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      18915b58
    • zhangyi (F)'s avatar
      ext4: cleanup bh release code in ext4_ind_remove_space() · 5e86bdda
      zhangyi (F) authored
      Currently, we are releasing the indirect buffer where we are done with
      it in ext4_ind_remove_space(), so we can see the brelse() and
      BUFFER_TRACE() everywhere.  It seems fragile and hard to read, and we
      may probably forget to release the buffer some day.  This patch cleans
      up the code by putting of the code which releases the buffers to the
      end of the function.
      Signed-off-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      5e86bdda
    • zhangyi (F)'s avatar
      ext4: brelse all indirect buffer in ext4_ind_remove_space() · 674a2b27
      zhangyi (F) authored
      All indirect buffers get by ext4_find_shared() should be released no
      mater the branch should be freed or not. But now, we forget to release
      the lower depth indirect buffers when removing space from the same
      higher depth indirect block. It will lead to buffer leak and futher
      more, it may lead to quota information corruption when using old quota,
      consider the following case.
      
       - Create and mount an empty ext4 filesystem without extent and quota
         features,
       - quotacheck and enable the user & group quota,
       - Create some files and write some data to them, and then punch hole
         to some files of them, it may trigger the buffer leak problem
         mentioned above.
       - Disable quota and run quotacheck again, it will create two new
         aquota files and write the checked quota information to them, which
         probably may reuse the freed indirect block(the buffer and page
         cache was not freed) as data block.
       - Enable quota again, it will invoke
         vfs_load_quota_inode()->invalidate_bdev() to try to clean unused
         buffers and pagecache. Unfortunately, because of the buffer of quota
         data block is still referenced, quota code cannot read the up to date
         quota info from the device and lead to quota information corruption.
      
      This problem can be reproduced by xfstests generic/231 on ext3 file
      system or ext4 file system without extent and quota features.
      
      This patch fix this problem by releasing the missing indirect buffers,
      in ext4_ind_remove_space().
      Reported-by: default avatarHulk Robot <hulkci@huawei.com>
      Signed-off-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: stable@kernel.org
      674a2b27
    • Gustavo A. R. Silva's avatar
      genirq: Mark expected switch case fall-through · 93417a3f
      Gustavo A. R. Silva authored
      In preparation to enabling -Wimplicit-fallthrough, mark switch
      cases where we are expecting to fall through.
      
      With -Wimplicit-fallthrough added to CFLAGS:
      
       kernel/irq/manage.c: In function ‘irq_do_set_affinity’:
       kernel/irq/manage.c:198:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
         cpumask_copy(desc->irq_common_data.affinity, mask);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       kernel/irq/manage.c:199:2: note: here
         case IRQ_SET_MASK_OK_NOCOPY:
         ^~~~
      
      Annotate it.
      Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Kees Cook <keescook@chromium.org>
      Link: https://lkml.kernel.org/r/20190228213714.GA9246@embeddedor
      93417a3f
    • Atish Patra's avatar
      clocksource/drivers/riscv: Fix clocksource mask · 32d0be01
      Atish Patra authored
      For all riscv architectures (RV32, RV64 and RV128), the clocksource
      is a 64 bit incrementing counter.
      
      Fix the clock source mask accordingly.
      
      Tested on both 64bit and 32 bit virt machine in QEMU.
      
      Fixes: 62b01943 ("clocksource: new RISC-V SBI timer driver")
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Cc: Albert Ou <aou@eecs.berkeley.edu>
      Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
      Cc: linux-riscv@lists.infradead.org
      Cc: Palmer Dabbelt <palmer@sifive.com>
      Cc: Anup Patel <Anup.Patel@wdc.com>
      Cc: Damien Le Moal <Damien.LeMoal@wdc.com>
      Cc: stable@vger.kernel.org
      Link: https://lkml.kernel.org/r/20190322215411.19362-1-atish.patra@wdc.com
      32d0be01
    • Kairui Song's avatar
      x86/gart: Exclude GART aperture from kcore · ffc8599a
      Kairui Song authored
      On machines where the GART aperture is mapped over physical RAM,
      /proc/kcore contains the GART aperture range. Accessing the GART range via
      /proc/kcore results in a kernel crash.
      
      vmcore used to have the same issue, until it was fixed with commit
      2a3e83c6 ("x86/gart: Exclude GART aperture from vmcore")', leveraging
      existing hook infrastructure in vmcore to let /proc/vmcore return zeroes
      when attempting to read the aperture region, and so it won't read from the
      actual memory.
      
      Apply the same workaround for kcore. First implement the same hook
      infrastructure for kcore, then reuse the hook functions introduced in the
      previous vmcore fix. Just with some minor adjustment, rename some functions
      for more general usage, and simplify the hook infrastructure a bit as there
      is no module usage yet.
      Suggested-by: default avatarBaoquan He <bhe@redhat.com>
      Signed-off-by: default avatarKairui Song <kasong@redhat.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarJiri Bohac <jbohac@suse.cz>
      Acked-by: default avatarBaoquan He <bhe@redhat.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Omar Sandoval <osandov@fb.com>
      Cc: Dave Young <dyoung@redhat.com>
      Link: https://lkml.kernel.org/r/20190308030508.13548-1-kasong@redhat.com
      
      ffc8599a
    • Steve French's avatar
      cifs: update internal module version number · cf7d624f
      Steve French authored
      To 2.19
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      cf7d624f
    • Steve French's avatar
      SMB3: Fix SMB3.1.1 guest mounts to Samba · 8c11a607
      Steve French authored
      Workaround problem with Samba responses to SMB3.1.1
      null user (guest) mounts.  The server doesn't set the
      expected flag in the session setup response so we have
      to do a similar check to what is done in smb3_validate_negotiate
      where we also check if the user is a null user (but not sec=krb5
      since username might not be passed in on mount for Kerberos case).
      
      Note that the commit below tightened the conditions and forced signing
      for the SMB2-TreeConnect commands as per MS-SMB2.
      However, this should only apply to normal user sessions and not for
      cases where there is no user (even if server forgets to set the flag
      in the response) since we don't have anything useful to sign with.
      This is especially important now that the more secure SMB3.1.1 protocol
      is in the default dialect list.
      
      An earlier patch ("cifs: allow guest mounts to work for smb3.11") fixed
      the guest mounts to Windows.
      
          Fixes: 6188f28b ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
      Reviewed-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
      Reviewed-by: default avatarPaulo Alcantara <palcantara@suse.de>
      CC: Stable <stable@vger.kernel.org>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      8c11a607
    • Paulo Alcantara (SUSE)'s avatar
      cifs: Fix slab-out-of-bounds when tracing SMB tcon · 68ddb496
      Paulo Alcantara (SUSE) authored
      This patch fixes the following KASAN report:
      
      [  779.044746] BUG: KASAN: slab-out-of-bounds in string+0xab/0x180
      [  779.044750] Read of size 1 at addr ffff88814f327968 by task trace-cmd/2812
      
      [  779.044756] CPU: 1 PID: 2812 Comm: trace-cmd Not tainted 5.1.0-rc1+ #62
      [  779.044760] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-0-ga698c89-prebuilt.qemu.org 04/01/2014
      [  779.044761] Call Trace:
      [  779.044769]  dump_stack+0x5b/0x90
      [  779.044775]  ? string+0xab/0x180
      [  779.044781]  print_address_description+0x6c/0x23c
      [  779.044787]  ? string+0xab/0x180
      [  779.044792]  ? string+0xab/0x180
      [  779.044797]  kasan_report.cold.3+0x1a/0x32
      [  779.044803]  ? string+0xab/0x180
      [  779.044809]  string+0xab/0x180
      [  779.044816]  ? widen_string+0x160/0x160
      [  779.044822]  ? vsnprintf+0x5bf/0x7f0
      [  779.044829]  vsnprintf+0x4e7/0x7f0
      [  779.044836]  ? pointer+0x4a0/0x4a0
      [  779.044841]  ? seq_buf_vprintf+0x79/0xc0
      [  779.044848]  seq_buf_vprintf+0x62/0xc0
      [  779.044855]  trace_seq_printf+0x113/0x210
      [  779.044861]  ? trace_seq_puts+0x110/0x110
      [  779.044867]  ? trace_raw_output_prep+0xd8/0x110
      [  779.044876]  trace_raw_output_smb3_tcon_class+0x9f/0xc0
      [  779.044882]  print_trace_line+0x377/0x890
      [  779.044888]  ? tracing_buffers_read+0x300/0x300
      [  779.044893]  ? ring_buffer_read+0x58/0x70
      [  779.044899]  s_show+0x6e/0x140
      [  779.044906]  seq_read+0x505/0x6a0
      [  779.044913]  vfs_read+0xaf/0x1b0
      [  779.044919]  ksys_read+0xa1/0x130
      [  779.044925]  ? kernel_write+0xa0/0xa0
      [  779.044931]  ? __do_page_fault+0x3d5/0x620
      [  779.044938]  do_syscall_64+0x63/0x150
      [  779.044944]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      [  779.044949] RIP: 0033:0x7f62c2c2db31
      [ 779.044955] Code: fe ff ff 48 8d 3d 17 9e 09 00 48 83 ec 08 e8 96 02
      02 00 66 0f 1f 44 00 00 8b 05 fa fc 2c 00 48 63 ff 85 c0 75 13 31 c0
      0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 55 53 48 89 d5 48
      89
      [  779.044958] RSP: 002b:00007ffd6e116678 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
      [  779.044964] RAX: ffffffffffffffda RBX: 0000560a38be9260 RCX: 00007f62c2c2db31
      [  779.044966] RDX: 0000000000002000 RSI: 00007ffd6e116710 RDI: 0000000000000003
      [  779.044966] RDX: 0000000000002000 RSI: 00007ffd6e116710 RDI: 0000000000000003
      [  779.044969] RBP: 00007f62c2ef5420 R08: 0000000000000000 R09: 0000000000000003
      [  779.044972] R10: ffffffffffffffa8 R11: 0000000000000246 R12: 00007ffd6e116710
      [  779.044975] R13: 0000000000002000 R14: 0000000000000d68 R15: 0000000000002000
      
      [  779.044981] Allocated by task 1257:
      [  779.044987]  __kasan_kmalloc.constprop.5+0xc1/0xd0
      [  779.044992]  kmem_cache_alloc+0xad/0x1a0
      [  779.044997]  getname_flags+0x6c/0x2a0
      [  779.045003]  user_path_at_empty+0x1d/0x40
      [  779.045008]  do_faccessat+0x12a/0x330
      [  779.045012]  do_syscall_64+0x63/0x150
      [  779.045017]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      [  779.045019] Freed by task 1257:
      [  779.045023]  __kasan_slab_free+0x12e/0x180
      [  779.045029]  kmem_cache_free+0x85/0x1b0
      [  779.045034]  filename_lookup.part.70+0x176/0x250
      [  779.045039]  do_faccessat+0x12a/0x330
      [  779.045043]  do_syscall_64+0x63/0x150
      [  779.045048]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      [  779.045052] The buggy address belongs to the object at ffff88814f326600
      which belongs to the cache names_cache of size 4096
      [  779.045057] The buggy address is located 872 bytes to the right of
      4096-byte region [ffff88814f326600, ffff88814f327600)
      [  779.045058] The buggy address belongs to the page:
      [  779.045062] page:ffffea00053cc800 count:1 mapcount:0 mapping:ffff88815b191b40 index:0x0 compound_mapcount: 0
      [  779.045067] flags: 0x200000000010200(slab|head)
      [  779.045075] raw: 0200000000010200 dead000000000100 dead000000000200 ffff88815b191b40
      [  779.045081] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
      [  779.045083] page dumped because: kasan: bad access detected
      
      [  779.045085] Memory state around the buggy address:
      [  779.045089]  ffff88814f327800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045093]  ffff88814f327880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045097] >ffff88814f327900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045099]                                                           ^
      [  779.045103]  ffff88814f327980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045107]  ffff88814f327a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045109] ==================================================================
      [  779.045110] Disabling lock debugging due to kernel taint
      
      Correctly assign tree name str for smb3_tcon event.
      Signed-off-by: default avatarPaulo Alcantara (SUSE) <paulo@paulo.ac>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      68ddb496
    • Ronnie Sahlberg's avatar
      cifs: allow guest mounts to work for smb3.11 · e71ab2aa
      Ronnie Sahlberg authored
      Fix Guest/Anonymous sessions so that they work with SMB 3.11.
      
      The commit noted below tightened the conditions and forced signing for
      the SMB2-TreeConnect commands as per MS-SMB2.
      However, this should only apply to normal user sessions and not for
      Guest/Anonumous sessions.
      
      Fixes: 6188f28b ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
      Signed-off-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
      CC: Stable <stable@vger.kernel.org>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      e71ab2aa
    • Steve French's avatar
      fix incorrect error code mapping for OBJECTID_NOT_FOUND · 85f9987b
      Steve French authored
      It was mapped to EIO which can be confusing when user space
      queries for an object GUID for an object for which the server
      file system doesn't support (or hasn't saved one).
      
      As Amir Goldstein suggested this is similar to ENOATTR
      (equivalently ENODATA in Linux errno definitions) so
      changing NT STATUS code mapping for OBJECTID_NOT_FOUND
      to ENODATA.
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      CC: Amir Goldstein <amir73il@gmail.com>
      85f9987b
    • Xiaoli Feng's avatar
      cifs: fix that return -EINVAL when do dedupe operation · b073a080
      Xiaoli Feng authored
      dedupe_file_range operations is combiled into remap_file_range.
      But it's always skipped for dedupe operations in function
      cifs_remap_file_range.
      
      Example to test:
      Before this patch:
        # dd if=/dev/zero of=cifs/file bs=1M count=1
        # xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
        XFS_IOC_FILE_EXTENT_SAME: Invalid argument
      
      After this patch:
        # dd if=/dev/zero of=cifs/file bs=1M count=1
        # xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
        XFS_IOC_FILE_EXTENT_SAME: Operation not supported
      
      Influence for xfstests:
      generic/091
      generic/112
      generic/127
      generic/263
      These tests report this error "do_copy_range:: Invalid
      argument" instead of "FIDEDUPERANGE: Invalid argument".
      Because there are still two bugs cause these test failed.
      https://bugzilla.kernel.org/show_bug.cgi?id=202935
      https://bugzilla.kernel.org/show_bug.cgi?id=202785Signed-off-by: default avatarXiaoli Feng <fengxiaoli0714@gmail.com>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      b073a080
    • Long Li's avatar
      CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN · 0b0dfd59
      Long Li authored
      When sending a rdata, transport may return -EAGAIN. In this case
      we should re-obtain credits because the session may have been
      reconnected.
      
      Change in v2: adjust_credits before re-sending
      Signed-off-by: default avatarLong Li <longli@microsoft.com>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      Reviewed-by: default avatarPavel Shilovsky <pshilov@microsoft.com>
      0b0dfd59
    • Long Li's avatar
      CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN · d53e292f
      Long Li authored
      When sending a wdata, transport may return -EAGAIN. In this case
      we should re-obtain credits because the session may have been
      reconnected.
      
      Change in v2: adjust_credits before re-sending
      Signed-off-by: default avatarLong Li <longli@microsoft.com>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      Reviewed-by: default avatarPavel Shilovsky <pshilov@microsoft.com>
      d53e292f
  4. 22 Mar, 2019 8 commits
    • YueHaibing's avatar
      clocksource/drivers/mips-gic-timer: Make gic_compare_irqaction static · 9039de40
      YueHaibing authored
      Fix sparse warning:
      
      drivers/clocksource/mips-gic-timer.c:70:18: warning:
       symbol 'gic_compare_irqaction' was not declared. Should it be static?
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: <daniel.lezcano@linaro.org>
      Link: https://lkml.kernel.org/r/20190322144359.19516-1-yuehaibing@huawei.com
      9039de40
    • YueHaibing's avatar
      clocksource/drivers/timer-ti-dm: Make omap_dm_timer_set_load_start() static · 008258d9
      YueHaibing authored
      Fix sparse warning:
      
      drivers/clocksource/timer-ti-dm.c:589:5: warning:
       symbol 'omap_dm_timer_set_load_start' was not declared. Should it be static?
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: <daniel.lezcano@linaro.org>
      Link: https://lkml.kernel.org/r/20190322144302.6704-1-yuehaibing@huawei.com
      008258d9
    • YueHaibing's avatar
      clocksource/drivers/tcb_clksrc: Make tc_clksrc_suspend/resume() static · bddee90a
      YueHaibing authored
      Fix sparse warnings:
      
      drivers/clocksource/tcb_clksrc.c:74:6: warning:
       symbol 'tc_clksrc_suspend' was not declared. Should it be static?
      drivers/clocksource/tcb_clksrc.c:89:6: warning:
       symbol 'tc_clksrc_resume' was not declared. Should it be static?
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: <nicolas.ferre@microchip.com>
      Cc: <daniel.lezcano@linaro.org>
      Cc: <linux-arm-kernel@lists.infradead.org>
      Link: https://lkml.kernel.org/r/20190322143940.12396-1-yuehaibing@huawei.com
      bddee90a
    • YueHaibing's avatar
      clocksource/drivers/clps711x: Make clps711x_clksrc_init() static · d18a7408
      YueHaibing authored
      Fix sparse warning:
      
      drivers/clocksource/clps711x-timer.c:96:13: warning:
       symbol 'clps711x_clksrc_init' was not declared. Should it be static?
      Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: <daniel.lezcano@linaro.org>
      Cc: <shc_work@mail.ru>
      Cc: <linux-arm-kernel@lists.infradead.org>
      Link: https://lkml.kernel.org/r/20190322143708.12716-1-yuehaibing@huawei.com
      d18a7408
    • Thomas Gleixner's avatar
      Merge tag 'perf-core-for-mingo-5.1-20190321' of... · d8b5297f
      Thomas Gleixner authored
      Merge tag 'perf-core-for-mingo-5.1-20190321' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/core improvements and fixes from Arnaldo:
      
      BPF:
      
        Song Liu:
      
        - Add support for annotating BPF programs, using the PERF_RECORD_BPF_EVENT
          and PERF_RECORD_KSYMBOL recently added to the kernel and plugging
          binutils's libopcodes disassembly of BPF programs with the existing
          annotation interfaces in 'perf annotate', 'perf report' and 'perf top'
          various output formats (--stdio, --stdio2, --tui).
      
      perf list:
      
        Andi Kleen:
      
        - Filter metrics when using substring search.
      
      perf record:
      
        Andi Kleen:
      
        - Allow to limit number of reported perf.data files
      
        - Clarify help for --switch-output.
      
      perf report:
      
        Andi Kleen
      
        - Indicate JITed code better.
      
        - Show all sort keys in help output.
      
      perf script:
      
        Andi Kleen:
      
        - Support relative time.
      
      perf stat:
      
        Andi Kleen:
      
        - Improve scaling.
      
      General:
      
        Changbin Du:
      
        - Fix some mostly error path memory and reference count leaks found
          using gcc's ASan and UBSan.
      
      Vendor events:
      
        Mamatha Inamdar:
      
        - Remove P8 HW events which are not supported.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      d8b5297f
    • Thomas Gleixner's avatar
      Merge tag 'perf-core-for-mingo-5.1-20190311' of... · 4a98be82
      Thomas Gleixner authored
      Merge tag 'perf-core-for-mingo-5.1-20190311' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/core improvements and fixes from Arnaldo:
      
      kernel:
      
        Stephane Eranian :
      
        - Restore mmap record type correctly when handling PERF_RECORD_MMAP2
          events, as the same template is used for all the threads interested
          in mmap events, some may want just PERF_RECORD_MMAP, while some
          may want the extra info in MMAP2 records.
      
      perf probe:
      
        Adrian Hunter:
      
        - Fix getting the kernel map, because since changes related to x86 PTI
          entry trampolines handling, there are more than one kernel map.
      
      perf script:
      
        Andi Kleen:
      
        - Support insn output for normal samples, i.e.:
      
          perf script -F ip,sym,insn --xed
      
          Will fetch the sample IP from the thread address space and feed it
          to Intel's XED disassembler, producing lines such as:
      
            ffffffffa4068804 native_write_msr            wrmsr
            ffffffffa415b95e __hrtimer_next_event_base   movq  0x18(%rax), %rdx
      
          That match 'perf annotate's output.
      
        - Make the --cpu filter apply to  PERF_RECORD_COMM/FORK/... events, in
          addition to PERF_RECORD_SAMPLE.
      
      perf report:
      
        - Add a new --samples option to save a small random number of samples
          per hist entry, using a reservoir technique to select a representative
          number of samples.
      
          Then allow browsing the samples using 'perf script' as part of the hist
          entry context menu. This automatically adds the right filters, so only
          the thread or CPU of the sample is displayed. Then we use less' search
          functionality to directly jump to the time stamp of the selected sample.
      
          It uses different menus for assembler and source display.  Assembler
          needs xed installed and source needs debuginfo.
      
        - Fix the UI browser scripts pop up menu when there are many scripts
          available.
      
      perf report:
      
        Andi Kleen:
      
        - Add 'time' sort option. E.g.:
      
          % perf report --sort time,overhead,symbol --time-quantum 1ms --stdio
          ...
               0.67%  277061.87300  [.] _dl_start
               0.50%  277061.87300  [.] f1
               0.50%  277061.87300  [.] f2
               0.33%  277061.87300  [.] main
               0.29%  277061.87300  [.] _dl_lookup_symbol_x
               0.29%  277061.87300  [.] dl_main
               0.29%  277061.87300  [.] do_lookup_x
               0.17%  277061.87300  [.] _dl_debug_initialize
               0.17%  277061.87300  [.] _dl_init_paths
               0.08%  277061.87300  [.] check_match
               0.04%  277061.87300  [.] _dl_count_modids
               1.33%  277061.87400  [.] f1
               1.33%  277061.87400  [.] f2
               1.33%  277061.87400  [.] main
               1.17%  277061.87500  [.] main
               1.08%  277061.87500  [.] f1
               1.08%  277061.87500  [.] f2
               1.00%  277061.87600  [.] main
               0.83%  277061.87600  [.] f1
               0.83%  277061.87600  [.] f2
               1.00%  277061.87700  [.] main
      
      tools headers:
      
        Arnaldo Carvalho de Melo:
      
        - Update x86's syscall_64.tbl, no change in tools/perf behaviour.
      
        -  Sync copies asm-generic/unistd.h and linux/in with the kernel sources.
      
      perf data:
      
        Jiri Olsa:
      
        - Prep work to support having perf.data stored as a directory, with one
          file per CPU, that ultimately will allow having one ring buffer reading
          thread per CPU.
      
      Vendor events:
      
        Martin Liška:
      
        - perf PMU events for AMD Family 17h.
      
      perf script python:
      
        Tony Jones:
      
        - Add python3 support for the remaining Intel PT related scripts, with
          these we should have a clean build of perf with python3 while still
          supporting the build with python2.
      
      libbpf:
      
        Arnaldo Carvalho de Melo:
      
        - Fix the build on uCLibc, adding the missing stdarg.h since we use
          va_list in one typedef.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      4a98be82
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a5ed1e96
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "One fix for a boot failure on 32-bit, introduced during the merge
        window.
      
        A fix for our handling of CLOCK_MONOTONIC in the 64-bit VDSO. Changing
        the wall clock across the Y2038 boundary could cause CLOCK_MONOTONIC
        to jump forward and backward.
      
        Our spectre_v2 reporting was a bit confusing due to a bug I
        introduced. On some systems it was reporting that the count cache was
        disabled and also that we were flushing the count cache on context
        switch. Only the former is true, and given that the count cache is
        disabled it doesn't make any sense to flush it. No one reported it, so
        presumably the presence of any mitigation is all people check for.
      
        Finally a small build fix for zsmalloc on 32-bit.
      
        Thanks to: Ben Hutchings, Christophe Leroy, Diana Craciun, Guenter
        Roeck, Michael Neuling"
      
      * tag 'powerpc-5.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/security: Fix spectre_v2 reporting
        powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM configurations
        powerpc/6xx: fix setup and use of SPRN_SPRG_PGDIR for hash32
        powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038
      a5ed1e96
    • Linus Torvalds's avatar
      Merge tag 'iommu-fixes-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 070c95d4
      Linus Torvalds authored
      Pull iommu fixes from Joerg Roedel:
      
       - AMD IOMMU fix for sg-mapping with sg->offset > PAGE_SIZE
      
       - Fix for IOVA code to trigger the slow-path less often
      
       - Two fixes for Intel VT-d to avoid writing to read-only registers and
         to flush the right domain id for the default domains in scalable mode
      
      * tag 'iommu-fixes-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
        iommu/vt-d: Save the right domain ID used by hardware
        iommu/vt-d: Check capability before disabling protected memory
        iommu/iova: Fix tracking of recently failed iova address
        iommu/amd: fix sg->dma_address for sg->offset bigger than PAGE_SIZE
      070c95d4