1. 08 Feb, 2020 20 commits
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · d4f309ca
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       - Fix an existing bug in our user access handling, exposed by one of
         the bug fixes we merged this cycle.
       - A fix for a boot hang on 32-bit with CONFIG_TRACE_IRQFLAGS and the
         recently added CONFIG_VMAP_STACK.
      Thanks to: Christophe Leroy, Guenter Roeck.
      * tag 'powerpc-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/futex: Fix incorrect user access blocking
    • Linus Torvalds's avatar
      Fix up remaining devm_ioremap_nocache() in SGI IOC3 8250 UART driver · b0ef7cda
      Linus Torvalds authored
      This is a merge error on my part - the driver was merged into mainline
      by commit c5951e7c ("Merge tag 'mips_5.6' of git://../mips/linux")
      over a week ago, but nobody apparently noticed that it didn't actually
      build due to still having a reference to the devm_ioremap_nocache()
      function, removed a few days earlier through commit 6a1000bd ("Merge
      tag 'ioremap-5.6' of git://../ioremap"
      Apparently this didn't get any build testing anywhere.  Not perhaps all
      that surprising: it's restricted to 64-bit MIPS only, and only with the
      new SGI_MFD_IOC3 support enabled.
      I only noticed because the ioremap conflicts in the ARM SoC driver
      update made me check there weren't any others hiding, and I found this
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 4ef1a30c
      Linus Torvalds authored
      Pull ARM SoC late updates from Olof Johansson:
       "This is some material that we picked up into our tree late, or that
        had more complex dependencies on more than one topic branch that makes
        sense to keep separately.
         - TI support for secure accelerators and hwrng on OMAP4/5
         - TI camera changes for dra7 and am437x and SGX improvement due to
           better reset control support on am335x, am437x and dra7
         - Davinci moves to proper clocksource on DM365, and regulator/audio
           improvements for DM365 and DM644x eval boards"
      * tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (32 commits)
        ARM: dts: omap4-droid4: Enable hdq for droid4 ds250x 1-wire battery nvmem
        ARM: dts: motorola-cpcap-mapphone: Configure calibration interrupt
        ARM: dts: Configure interconnect target module for am437x sgx
        ARM: dts: Configure sgx for dra7
        ARM: dts: Configure rstctrl reset for am335x SGX
        ARM: dts: dra7: Add ti-sysc node for VPE
        ARM: dts: dra7: add vpe clkctrl node
        ARM: dts: am43x-epos-evm: Add VPFE and OV2659 entries
        ARM: dts: am437x-sk-evm: Add VPFE and OV2659 entries
        ARM: dts: am43xx: add support for clkout1 clock
        arm: dts: dra76-evm: Add CAL and OV5640 nodes
        arm: dtsi: dra76x: Add CAL dtsi node
        arm: dts: dra72-evm-common: Add entries for the CSI2 cameras
        ARM: dts: DRA72: Add CAL dtsi node
        ARM: dts: dra7-l4: Add ti-sysc node for CAM
        ARM: OMAP: DRA7xx: Make CAM clock domain SWSUP only
        ARM: dts: dra7: add cam clkctrl node
        ARM: OMAP2+: Drop legacy platform data for omap4 des
        ARM: OMAP2+: Drop legacy platform data for omap4 sham
        ARM: OMAP2+: Drop legacy platform data for omap4 aes
    • Linus Torvalds's avatar
      Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 5939224c
      Linus Torvalds authored
      Pull ARM SoC defconfig updates from Olof Johansson:
       "We keep this in a separate branch to avoid cross-branch conflicts, but
        most of the material here is fairly boring -- some new drivers turned
        on for hardware since they were merged, and some refreshed files due
        to time having moved a lot of entries around"
      * tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (38 commits)
        ARM: configs: at91: enable MMC_SDHCI_OF_AT91 and MICROCHIP_PIT64B
        arm64: defconfig: Enable Broadcom's GENET Ethernet controller
        ARM: multi_v7_defconfig: Enable devfreq thermal integration
        ARM: exynos_defconfig: Enable devfreq thermal integration
        ARM: multi_v7_defconfig: Enable NFS v4.1 and v4.2
        ARM: exynos_defconfig: Enable NFS v4.1 and v4.2
        arm64: defconfig: Enable Actions Semi specific drivers
        arm64: defconfig: Enable Broadcom's STB PCIe controller
        arm64: defconfig: Enable CONFIG_CLK_IMX8MP by default
        ARM: configs: at91: enable config flags for sam9x60 SoC
        ARM: configs: at91: use savedefconfig
        arm64: defconfig: Enable tegra XUDC support
        ARM: defconfig: gemini: Update defconfig
        arm64: defconfig: enable CONFIG_ARM_QCOM_CPUFREQ_NVMEM
        arm64: defconfig: enable CONFIG_QCOM_CPR
        arm64: defconfig: Enable HFPLL
        arm64: defconfig: Enable CRYPTO_DEV_FSL_CAAM
        ARM: imx_v6_v7_defconfig: Select the TFP410 driver
        ARM: imx_v6_v7_defconfig: Enable NFS_V4_1 and NFS_V4_2 support
        arm64: defconfig: Enable ATH10K_SNOC
    • Linus Torvalds's avatar
      Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · eab35405
      Linus Torvalds authored
      Pull ARM SoC-related driver updates from Olof Johansson:
       "Various driver updates for platforms:
         - Nvidia: Fuse support for Tegra194, continued memory controller
           pieces for Tegra30
         - NXP/FSL: Refactorings of QuickEngine drivers to support
         - NXP/FSL: i.MX8MP SoC driver pieces
         - TI Keystone: ring accelerator driver
         - Qualcomm: SCM driver cleanup/refactoring + support for new SoCs.
         - Xilinx ZynqMP: feature checking interface for firmware. Mailbox
           communication for power management
         - Overall support patch set for cpuidle on more complex hierarchies
        and misc cleanups, refactorings of Marvell, TI, other platforms"
      * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (166 commits)
        drivers: soc: xilinx: Use mailbox IPI callback
        dt-bindings: power: reset: xilinx: Add bindings for ipi mailbox
        drivers: soc: ti: knav_qmss_queue: Pass lockdep expression to RCU lists
        MAINTAINERS: Add brcmstb PCIe controller entry
        soc/tegra: fuse: Unmap registers once they are not needed anymore
        soc/tegra: fuse: Correct straps' address for older Tegra124 device trees
        soc/tegra: fuse: Warn if straps are not ready
        soc/tegra: fuse: Cache values of straps and Chip ID registers
        memory: tegra30-emc: Correct error message for timed out auto calibration
        memory: tegra30-emc: Firm up hardware programming sequence
        memory: tegra30-emc: Firm up suspend/resume sequence
        soc/tegra: regulators: Do nothing if voltage is unchanged
        memory: tegra: Correct reset value of xusb_hostr
        soc/tegra: fuse: Add APB DMA dependency for Tegra20
        bus: tegra-aconnect: Remove PM_CLK dependency
        dt-bindings: mediatek: add MT6765 power dt-bindings
        soc: mediatek: cmdq: delete not used define
        memory: tegra: Add support for the Tegra194 memory controller
        memory: tegra: Only include support for enabled SoCs
        memory: tegra: Support DVFS on Tegra186 and later
    • Linus Torvalds's avatar
      Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 1afa9c3b
      Linus Torvalds authored
      Pull ARM Device-tree updates from Olof Johansson:
       "New SoCs:
         - Atmel/Microchip SAM9X60 (ARM926 SoC)
         - OMAP 37xx gets split into AM3703/AM3715/DM3725, who are all
           variants of it with different GPU/media IP configurations.
         - ST stm32mp15 SoCs (1-2 Cortex-A7, CAN, GPU depending on SKU)
         - ST Ericsson ab8505 (variant of ab8500) and db8520 (variant of
         - Unisoc SC9863A SoC (8x Cortex-A55 mobile chipset w/ GPU, modem)
         - Qualcomm SC7180 (8-core 64bit SoC, unnamed CPU class)
        New boards:
         - Allwinner:
            + Emlid Neutis SoM (H3 variant)
            + Libre Computer ALL-H3-IT
            + PineH64 Model B
         - Amlogic:
            + Libretech Amlogic GX PC (s905d and s912-based variants)
         - Atmel/Microchip:
            + Kizboxmini, sam9x60 EK, sama5d27 Wireless SOM (wlsom1)
         - Marvell:
            + Armada 385-based SolidRun Clearfog GTR
         - NXP:
            + Gateworks GW59xx boards based on i.MX6/6Q/6QDL
            + Tolino Shine 3 eBook reader (i.MX6sl)
            + Embedded Artists COM (i.MX7ULP)
            + SolidRun CLearfog CX/ITX and HoneyComb (LX2160A-based systems)
            + Google Coral Edge TPU (i.MX8MQ)
         - Rockchip:
            + Radxa Dalang Carrier (supports rk3288 and rk3399 SOMs)
            + Radxa Rock Pi N10 (RK3399Pro-based)
            + VMARC RK3399Pro SOM
         - ST:
            + Reference boards for stm32mp15
         - ST Ericsson:
            + Samsung Galaxy S III mini (GT-I8190)
            + HREF520 reference board for DB8520
         - TI OMAP:
            + Gen1 Amazon Echo (OMAP3630-based)
         - Qualcomm:
            + Inforce 6640 Single Board Computer (msm8996-based)
            + SC7180 IDP (SC7180-based)"
      * tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (623 commits)
        dt-bindings: fix compilation error of the example in marvell,mmp3-hsic-phy.yaml
        arm64: dts: ti: k3-am654-base-board: Add CSI2 OV5640 camera
        arm64: dts: ti: k3-am65-main Add CAL node
        arm64: dts: ti: k3-j721e-main: Add McASP nodes
        arm64: dts: ti: k3-am654-main: Add McASP nodes
        arm64: dts: ti: k3-j721e: DMA support
        arm64: dts: ti: k3-j721e-main: Move secure proxy and smmu under main_navss
        arm64: dts: ti: k3-j721e-main: Correct main NAVSS representation
        arm64: dts: ti: k3-j721e: Correct the address for MAIN NAVSS
        arm64: dts: ti: k3-am65: DMA support
        arm64: dts: ti: k3-am65-main: Move secure proxy under cbass_main_navss
        arm64: dts: ti: k3-am65-main: Correct main NAVSS representation
        ARM: dts: aspeed: rainier: Add UCD90320 power sequencer
        ARM: dts: aspeed: rainier: Switch PSUs to unknown version
        arm64: dts: rockchip: Kill off "simple-panel" compatibles
        ARM: dts: rockchip: Kill off "simple-panel" compatibles
        arm64: dts: rockchip: rename dwmmc node names to mmc
        ARM: dts: rockchip: rename dwmmc node names to mmc
        arm64: dts: exynos: Rename Samsung and Exynos to lowercase
        arm64: dts: uniphier: add reset-names to NAND controller node
    • Linus Torvalds's avatar
      Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 469030d4
      Linus Torvalds authored
      Pull ARM SoC platform updates from Olof Johansson:
       "Most of these are smaller fixes that have accrued, and some continued
        cleanup of OMAP platforms towards shared frameworks.
        One new SoC from Atmel/Microchip: sam9x60"
      * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (35 commits)
        ARM: OMAP2+: Fix undefined reference to omap_secure_init
        ARM: s3c64xx: Drop unneeded select of TIMER_OF
        ARM: exynos: Drop unneeded select of MIGHT_HAVE_CACHE_L2X0
        ARM: s3c24xx: Switch to atomic pwm API in rx1950
        ARM: OMAP2+: sleep43xx: Call secure suspend/resume handlers
        ARM: OMAP2+: Use ARM SMC Calling Convention when OP-TEE is available
        ARM: OMAP2+: Introduce check for OP-TEE in omap_secure_init()
        ARM: OMAP2+: Add omap_secure_init callback hook for secure initialization
        ARM: at91: Documentation: add sam9x60 product and datasheet
        ARM: at91: pm: use of_device_id array to find the proper shdwc node
        ARM: at91: pm: use SAM9X60 PMC's compatible
        ARM: imx: only select ARM_ERRATA_814220 for ARMv7-A
        ARM: zynq: use physical cpuid in zynq_slcr_cpu_stop/start
        ARM: tegra: Use clk_m CPU on Tegra124 LP1 resume
        ARM: tegra: Modify reshift divider during LP1
        ARM: tegra: Enable PLLP bypass during Tegra124 LP1
        ARM: samsung: Rename Samsung and Exynos to lowercase
        ARM: exynos: Correct the help text for platform Kconfig option
        ARM: bcm: Select ARM_AMBA for ARCH_BRCMSTB
        ARM: brcmstb: Add debug UART entry for 7216
    • Linus Torvalds's avatar
      Merge tag 'compat-ioctl-fix' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground · b85080c1
      Linus Torvalds authored
      Pull compat-ioctl fix from Arnd Bergmann:
       "One patch in the compat-ioctl series broke 32-bit rootfs for multiple
        people testing on 64-bit kernels. Let's fix it in -rc1 before others
        run into the same issue"
      * tag 'compat-ioctl-fix' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground:
        compat_ioctl: fix FIONREAD on devices
    • Linus Torvalds's avatar
      Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · c9d35ee0
      Linus Torvalds authored
      Pull vfs file system parameter updates from Al Viro:
       "Saner fs_parser.c guts and data structures. The system-wide registry
        of syntax types (string/enum/int32/oct32/.../etc.) is gone and so is
        the horror switch() in fs_parse() that would have to grow another case
        every time something got added to that system-wide registry.
        New syntax types can be added by filesystems easily now, and their
        namespace is that of functions - not of system-wide enum members. IOW,
        they can be shared or kept private and if some turn out to be widely
        useful, we can make them common library helpers, etc., without having
        to do anything whatsoever to fs_parse() itself.
        And we already get that kind of requests - the thing that finally
        pushed me into doing that was "oh, and let's add one for timeouts -
        things like 15s or 2h". If some filesystem really wants that, let them
        do it. Without somebody having to play gatekeeper for the variants
        blessed by direct support in fs_parse(), TYVM.
        Quite a bit of boilerplate is gone. And IMO the data structures make a
        lot more sense now. -200LoC, while we are at it"
      * 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (25 commits)
        tmpfs: switch to use of invalfc()
        cgroup1: switch to use of errorfc() et.al.
        procfs: switch to use of invalfc()
        hugetlbfs: switch to use of invalfc()
        cramfs: switch to use of errofc() et.al.
        gfs2: switch to use of errorfc() et.al.
        fuse: switch to use errorfc() et.al.
        ceph: use errorfc() and friends instead of spelling the prefix out
        prefix-handling analogues of errorf() and friends
        turn fs_param_is_... into functions
        fs_parse: handle optional arguments sanely
        fs_parse: fold fs_parameter_desc/fs_parameter_spec
        fs_parser: remove fs_parameter_description name field
        add prefix to fs_context->log
        ceph_parse_param(), ceph_parse_mon_ips(): switch to passing fc_log
        new primitive: __fs_parse()
        switch rbd and libceph to p_log-based primitives
        struct p_log, variants of warnf() et.al. taking that one instead
        teach logfc() to handle prefices, give it saner calling conventions
        get rid of cg_invalf()
    • Linus Torvalds's avatar
      Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 236f4532
      Linus Torvalds authored
      Pull misc vfs updates from Al Viro:
       - bmap series from cmaiolino
       - getting rid of convolutions in copy_mount_options() (use a couple of
         copy_from_user() instead of the __get_user() crap)
      * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        saner copy_mount_options()
        fibmap: Reject negative block numbers
        fibmap: Use bmap instead of ->bmap method in ioctl_fibmap
        ecryptfs: drop direct calls to ->bmap
        cachefiles: drop direct usage of ->bmap method.
        fs: Enable bmap() function to properly return errors
    • Linus Torvalds's avatar
      Merge branch 'pipe-exclusive-wakeup' · 99593330
      Linus Torvalds authored
      Merge thundering herd avoidance on pipe IO.
      This would have been applied for 5.5 already, but got delayed because of
      a user-space race condition in the GNU make jobserver code.  Now that
      there's a new GNU make 4.3 release, and most distributions seem to have
      at least applied the (almost three year old) fix for the problem, let's
      see if people notice.
      And it might have been just bad random timing luck on my machine.
      If you do hit the race condition, things will still work, but the
      symptom is that you don't get nearly the expected parallelism when using
      "make -j<N>".
      The jobserver bug can definitely happen without this patch too, but
      seems to be easier to trigger when we no longer wake up pipe waiters
      * pipe-exclusive-wakeup:
        pipe: use exclusive waits when reading or writing
    • Linus Torvalds's avatar
      pipe: use exclusive waits when reading or writing · 0ddad21d
      Linus Torvalds authored
      This makes the pipe code use separate wait-queues and exclusive waiting
      for readers and writers, avoiding a nasty thundering herd problem when
      there are lots of readers waiting for data on a pipe (or, less commonly,
      lots of writers waiting for a pipe to have space).
      While this isn't a common occurrence in the traditional "use a pipe as a
      data transport" case, where you typically only have a single reader and
      a single writer process, there is one common special case: using a pipe
      as a source of "locking tokens" rather than for data communication.
      In particular, the GNU make jobserver code ends up using a pipe as a way
      to limit parallelism, where each job consumes a token by reading a byte
      from the jobserver pipe, and releases the token by writing a byte back
      to the pipe.
      This pattern is fairly traditional on Unix, and works very well, but
      will waste a lot of time waking up a lot of processes when only a single
      reader needs to be woken up when a writer releases a new token.
      A simplified test-case of just this pipe interaction is to create 64
      processes, and then pass a single token around between them (this
      test-case also intentionally passes another token that gets ignored to
      test the "wake up next" logic too, in case anybody wonders about it):
          #include <unistd.h>
          int main(int argc, char **argv)
              int fd[2], counters[2];
              counters[0] = 0;
              counters[1] = -1;
              write(fd[1], counters, sizeof(counters));
              /* 64 processes */
              fork(); fork(); fork(); fork(); fork(); fork();
              do {
                      int i;
                      read(fd[0], &i, sizeof(i));
                      if (i < 0)
                      counters[0] = i+1;
                      write(fd[1], counters, (1+(i & 1)) *sizeof(int));
              } while (counters[0] < 1000000);
              return 0;
      and in a perfect world, passing that token around should only cause one
      context switch per transfer, when the writer of a token causes a
      directed wakeup of just a single reader.
      But with the "writer wakes all readers" model we traditionally had, on
      my test box the above case causes more than an order of magnitude more
      scheduling: instead of the expected ~1M context switches, "perf stat"
              231,852.37 msec task-clock                #   15.857 CPUs utilized
              11,250,961      context-switches          #    0.049 M/sec
                 616,304      cpu-migrations            #    0.003 M/sec
                   1,648      page-faults               #    0.007 K/sec
       1,097,903,998,514      cycles                    #    4.735 GHz
         120,781,778,352      instructions              #    0.11  insn per cycle
          27,997,056,043      branches                  #  120.754 M/sec
             283,581,233      branch-misses             #    1.01% of all branches
            14.621273891 seconds time elapsed
             0.018243000 seconds user
             3.611468000 seconds sys
      before this commit.
      After this commit, I get
                5,229.55 msec task-clock                #    3.072 CPUs utilized
               1,212,233      context-switches          #    0.232 M/sec
                 103,951      cpu-migrations            #    0.020 M/sec
                   1,328      page-faults               #    0.254 K/sec
          21,307,456,166      cycles                    #    4.074 GHz
          12,947,819,999      instructions              #    0.61  insn per cycle
           2,881,985,678      branches                  #  551.096 M/sec
              64,267,015      branch-misses             #    2.23% of all branches
             1.702148350 seconds time elapsed
             0.004868000 seconds user
             0.110786000 seconds sys
      instead. Much better.
      [ Note! This kernel improvement seems to be very good at triggering a
        race condition in the make jobserver (in GNU make 4.2.1) for me. It's
        a long known bug that was fixed back in June 2017 by GNU make commit
        b552b0525198 ("[SV 51159] Use a non-blocking read with pselect to
        avoid hangs.").
        But there wasn't a new release of GNU make until 4.3 on Jan 19 2020,
        so a number of distributions may still have the buggy version. Some
        have backported the fix to their 4.2.1 release, though, and even
        without the fix it's quite timing-dependent whether the bug actually
        is hit. ]
      Josh Triplett says:
       "I've been hammering on your pipe fix patch (switching to exclusive
        wait queues) for a month or so, on several different systems, and I've
        run into no issues with it. The patch *substantially* improves
        parallel build times on large (~100 CPU) systems, both with parallel
        make and with other things that use make's pipe-based jobserver.
        All current distributions (including stable and long-term stable
        distributions) have versions of GNU make that no longer have the
        jobserver bug"
      Tested-by: default avatarJosh Triplett <josh@joshtriplett.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Arnd Bergmann's avatar
      compat_ioctl: fix FIONREAD on devices · 0a061743
      Arnd Bergmann authored
      My final cleanup patch for sys_compat_ioctl() introduced a regression on
      the FIONREAD ioctl command, which is used for both regular and special
      files, but only works on regular files after my patch, as I had missed
      the warning that Al Viro put into a comment right above it.
      Change it back so it can work on any file again by moving the implementation
      to do_vfs_ioctl() instead.
      Fixes: 77b90401
       ("compat_ioctl: simplify the implementation")
      Reported-and-tested-by: default avatarChristian Zigotzky <chzigotzky@xenosoft.de>
      Reported-and-tested-by: default avataryouling257 <youling257@gmail.com>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    • Christophe Leroy's avatar
      powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK · d4bf9053
      Christophe Leroy authored
      When CONFIG_PROVE_LOCKING is selected together with (now default)
      CONFIG_VMAP_STACK, kernel enter deadlock during boot.
      At the point of checking whether interrupts are enabled or not, the
      value of MSR saved on stack is read using the physical address of the
      stack. But at this point, when using VMAP stack the DATA MMU
      translation has already been re-enabled, leading to deadlock.
      Don't use the physical address of the stack when
      CONFIG_VMAP_STACK is set.
      Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Fixes: 02847487
       ("powerpc/32: prepare for CONFIG_VMAP_STACK")
      Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/daeacdc0dec0416d1c587cc9f9e7191ad3068dc0.1581095957.git.christophe.leroy@c-s.fr
    • Michael Ellerman's avatar
      powerpc/futex: Fix incorrect user access blocking · 9dc086f1
      Michael Ellerman authored
      The early versions of our kernel user access prevention (KUAP) were
      written by Russell and Christophe, and didn't have separate
      read/write access.
      At some point I picked up the series and added the read/write access,
      but I failed to update the usages in futex.h to correctly allow read
      and write.
      However we didn't notice because of another bug which was causing the
      low-level code to always enable read and write. That bug was fixed
      recently in commit 1d8f739b ("powerpc/kuap: Fix set direction in
      futex_atomic_cmpxchg_inatomic() is passed the user address as %3 and
        1:     lwarx   %1,  0, %3
               cmpw    0,  %1, %4
               bne-    3f
        2:     stwcx.  %5,  0, %3
      Which clearly loads and stores from/to %3. The logic in
      arch_futex_atomic_op_inuser() is similar, so fix both of them to use
      Without this fix, and with PPC_KUAP_DEBUG=y, we see eg:
        Bug: Read fault blocked by AMR!
        WARNING: CPU: 94 PID: 149215 at arch/powerpc/include/asm/book3s/64/kup-radix.h:126 __do_page_fault+0x600/0xf30
        CPU: 94 PID: 149215 Comm: futex_requeue_p Tainted: G        W         5.5.0-rc7-gcc9x-g4c25df56 #1
        NIP [c000000000070680] __do_page_fault+0x600/0xf30
        LR [c00000000007067c] __do_page_fault+0x5fc/0xf30
        Call Trace:
        [c00020138e5637e0] [c00000000007067c] __do_page_fault+0x5fc/0xf30 (unreliable)
        [c00020138e5638c0] [c00000000000ada8] handle_page_fault+0x10/0x30
        --- interrupt: 301 at cmpxchg_futex_value_locked+0x68/0xd0
            LR = futex_lock_pi_atomic+0xe0/0x1f0
        [c00020138e563bc0] [c000000000217b50] futex_lock_pi_atomic+0x80/0x1f0 (unreliable)
        [c00020138e563c30] [c00000000021b668] futex_requeue+0x438/0xb60
        [c00020138e563d60] [c00000000021c6cc] do_futex+0x1ec/0x2b0
        [c00020138e563d90] [c00000000021c8b8] sys_futex+0x128/0x200
        [c00020138e563e20] [c00000000000b7ac] system_call+0x5c/0x68
      Fixes: de78a9c4
       ("powerpc: Add a framework for Kernel Userspace Access Protection")
      Cc: stable@vger.kernel.org # v5.2+
      Reported-by: syzbot+e808452bad7c375cbee6@syzkaller-ppc64.appspotmail.com
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Reviewed-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
      Link: https://lore.kernel.org/r/20200207122145.11928-1-mpe@ellerman.id.au
    • Linus Torvalds's avatar
      Merge tag 'fuse-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse · f7571657
      Linus Torvalds authored
      Pull fuse fixes from Miklos Szeredi:
       - Fix a regression introduced in v5.1 that triggers WARNINGs for some
         fuse filesystems
       - Fix an xfstest failure
       - Allow overlayfs to be used on top of fuse/virtiofs
       - Code and documentation cleanups
      * tag 'fuse-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
        fuse: use true,false for bool variable
        Documentation: filesystems: convert fuse to RST
        fuse: Support RENAME_WHITEOUT flag
        fuse: don't overflow LLONG_MAX with end offset
        fix up iter on short count in fuse_direct_io()
    • Linus Torvalds's avatar
      Merge tag 'gfs2-for-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 · 175787e0
      Linus Torvalds authored
      Pull gfs2 fixes from Andreas Gruenbacher:
       - Fix a bug in Abhi Das's journal head lookup improvements that can
         cause a valid journal to be rejected.
       - Fix an O_SYNC write handling bug reported by Christoph Hellwig.
      * tag 'gfs2-for-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
        gfs2: fix O_SYNC write handling
        gfs2: move setting current->backing_dev_info
        gfs2: fix gfs2_find_jhead that returns uninitialized jhead with seq 0
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux · 60ea27e9
      Linus Torvalds authored
      Pull orangefs fix from Mike Marshall:
       "Debugfs fix for orangefs.
        Vasliy Averin noticed that 'if seq_file .next function does not change
        position index, read after some lseek can generate unexpected output'
        and sent in this fix"
      * tag 'for-linus-5.6-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
        help_next should increase position index
    • Linus Torvalds's avatar
      Merge tag 'nfsd-5.6' of git://linux-nfs.org/~bfields/linux · 08dffcc7
      Linus Torvalds authored
      Pull nfsd updates from Bruce Fields:
         - Server-to-server copy code from Olga.
           To use it, client and both servers must have support, the target
           server must be able to access the source server over NFSv4.2, and
           the target server must have the inter_copy_offload_enable module
           parameter set.
         - Improvements and bugfixes for the new filehandle cache, especially
           in the container case, from Trond
         - Also from Trond, better reporting of write errors.
         - Y2038 work from Arnd"
      * tag 'nfsd-5.6' of git://linux-nfs.org/~bfields/linux: (55 commits)
        sunrpc: expiry_time should be seconds not timeval
        nfsd: make nfsd_filecache_wq variable static
        nfsd4: fix double free in nfsd4_do_async_copy()
        nfsd: convert file cache to use over/underflow safe refcount
        nfsd: Define the file access mode enum for tracing
        nfsd: Fix a perf warning
        nfsd: Ensure sampling of the write verifier is atomic with the write
        nfsd: Ensure sampling of the commit verifier is atomic with the commit
        sunrpc: clean up cache entry add/remove from hashtable
        sunrpc: Fix potential leaks in sunrpc_cache_unhash()
        nfsd: Ensure exclusion between CLONE and WRITE errors
        nfsd: Pass the nfsd_file as arguments to nfsd4_clone_file_range()
        nfsd: Update the boot verifier on stable writes too.
        nfsd: Fix stable writes
        nfsd: Allow nfsd_vfs_write() to take the nfsd_file as an argument
        nfsd: Fix a soft lockup race in nfsd_file_mark_find_or_create()
        nfsd: Reduce the number of calls to nfsd_file_gc()
        nfsd: Schedule the laundrette regularly irrespective of file errors
        nfsd: Remove unused constant NFSD_FILE_LRU_RESCAN
        nfsd: Containerise filecache laundrette
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-5.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs · f43574d0
      Linus Torvalds authored
      Puyll NFS client updates from Anna Schumaker:
       "Stable bugfixes:
         - Fix memory leaks and corruption in readdir # v2.6.37+
         - Directory page cache needs to be locked when read # v2.6.37+
        New features:
         - Convert NFS to use the new mount API
         - Add "softreval" mount option to let clients use cache if server goes down
         - Add a config option to compile without UDP support
         - Limit the number of inactive delegations the client can cache at once
         - Improved readdir concurrency using iterate_shared()
        Other bugfixes and cleanups:
         - More 64-bit time conversions
         - Add additional diagnostic tracepoints
         - Check for holes in swapfiles, and add dependency on CONFIG_SWAP
         - Various xprtrdma cleanups to prepare for 5.7's changes
         - Several fixes for NFS writeback and commit handling
         - Fix acls over krb5i/krb5p mounts
         - Recover from premature loss of openstateids
         - Fix NFS v3 chacl and chmod bug
         - Compare creds using cred_fscmp()
         - Use kmemdup_nul() in more places
         - Optimize readdir cache page invalidation
         - Lease renewal and recovery fixes"
      * tag 'nfs-for-5.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (93 commits)
        NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals
        NFSv4: try lease recovery on NFS4ERR_EXPIRED
        NFS: Fix memory leaks
        nfs: optimise readdir cache page invalidation
        NFS: Switch readdir to using iterate_shared()
        NFS: Use kmemdup_nul() in nfs_readdir_make_qstr()
        NFS: Directory page cache pages need to be locked when read
        NFS: Fix memory leaks and corruption in readdir
        SUNRPC: Use kmemdup_nul() in rpc_parse_scope_id()
        NFS: Replace various occurrences of kstrndup() with kmemdup_nul()
        NFSv4: Limit the total number of cached delegations
        NFSv4: Add accounting for the number of active delegations held
        NFSv4: Try to return the delegation immediately when marked for return on close
        NFS: Clear NFS_DELEGATION_RETURN_IF_CLOSED when the delegation is returned
        NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNING
        NFS: nfs_find_open_context() should use cred_fscmp()
        NFS: nfs_access_get_cached_rcu() should use cred_fscmp()
        NFSv4: pnfs_roc() must use cred_fscmp() to compare creds
        NFS: remove unused macros
        nfs: Return EINVAL rather than ERANGE for mount parse errors
  2. 07 Feb, 2020 20 commits
    • Linus Torvalds's avatar
      Merge tag 'docs-5.6-2' of git://git.lwn.net/linux · 41dcd67e
      Linus Torvalds authored
      Pull Documentation fixes from Jonathan Corbet:
       "A handful of small documentation fixes that wandered in"
      * tag 'docs-5.6-2' of git://git.lwn.net/linux:
        Allow git builds of Sphinx
        Documentation: changes.rst: update several outdated project URLs
        Documentation: build warnings related to missing blank lines after explicit markups has been fixed
        mailmap: add entry for Tiezhu Yang
        Documentation/ko_KR/howto: Update a broken link
        Documentation/ko_KR/howto: Update broken web addresses
        docs/locking: Fix outdated section names
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 11777ee8
      Linus Torvalds authored
      Pull i2c updates from Wolfram Sang:
       "i2c core:
         - huge improvements and refactorizations of the Linux I2C
           documentation (lots of thanks to Luca for doing it and Jean for the
           careful review)
         - subsystem wide API conversion to i2c_new_client_device()
         - remove obsolete parport-light driver
         - smaller core updates (removal of 'extern', enabling more compile
           testing, use more helper macros)
         - and quite a bunch of driver updates (new IDs, simplifications,
           better PM, support of atomic transfers and other improvements)
         - The main feature is the idle-state rework of the pca954x driver
           from Biwen Li
        at24 driver:
         - minor maintenance: update the license tag, sort headers
         - move support for the write-protect pin into nvmem core
         - add a reference to the new wp-gpios property in nvmem to at25
         - add support for regulator and pm_runtime control"
      * 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (91 commits)
        i2c: cros-ec-tunnel: Fix ACPI identifier
        i2c: cros-ec-tunnel: Fix slave device enumeration
        i2c: stm32f7: add PM_SLEEP suspend/resume support
        i2c: cadence: Fix wording in i2c-cadence driver
        i2c: cadence: Fix power management order of operations
        i2c: cadence: Fix error printing in case of defer
        i2c: cadence: Handle transfer_size rollover
        i2c: i801: Add support for Intel Comet Lake PCH-V
        docs: i2c: writing-clients: properly name the stop condition
        docs: i2c: i2c-protocol: use same wording as smbus-protocol
        docs: i2c: rename sections so the overall picture is clearer
        docs: i2c: old-module-parameters: use monospace instead of ""
        docs: i2c: old-module-parameters: clarify this is for obsolete kernels
        docs: i2c: old-module-parameters: fix internal hyperlink
        docs: i2c: instantiating-devices: use monospace for sysfs attributes
        docs: i2c: instantiating-devices: rearrange static instatiation
        docs: i2c: instantiating-devices: fix internal hyperlink
        docs: i2c: smbus-protocol: improve I2C Block transactions description
        docs: i2c: smbus-protocol: fix punctuation
        docs: i2c: smbus-protocol: fix typo
    • Linus Torvalds's avatar
      Merge tag 'acpi-5.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · ed39ba0e
      Linus Torvalds authored
      Pull more ACPI updates from Rafael Wysocki:
       "Add Hisilicon Hip08-Lite I2C controller clock frequency support to the
        ACPI driver for AMD SoCs (APD) and to the Designware I2C driver
        (Hanjun Guo)"
      * tag 'acpi-5.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        i2c: designware: Add ACPI HID for Hisilicon Hip08-Lite I2C controller
        ACPI / APD: Add clock frequency for Hisilicon Hip08-Lite I2C controller
    • Linus Torvalds's avatar
      Merge tag 'pm-5.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · ba7dcfc7
      Linus Torvalds authored
      Pull more power management updates from Rafael Wysocki:
       - Update the recently merged CPR (Core Power Reduction) support in the
         AVS (Adaptive Voltage Scaling) subsystem (Brendan Higgins, Nathan
         Chancellor, Niklas Cassel)
       - Update the rockchip-io AVS driver (Heiko Stuebner)
       - Add two more module parameters to intel_idle on top of the recently
         merged material (Rafael Wysocki)
       - Clean up a piece of cpuidle documentation and consolidate system
         sleep states documentation (Rafael Wysocki)
      * tag 'pm-5.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpuidle: Documentation: Clean up PM QoS description
        Documentation: admin-guide: PM: Update sleep states documentation
        intel_idle: Introduce 'states_off' module parameter
        intel_idle: Introduce 'use_acpi' module parameter
        power: avs: qcom-cpr: Avoid clang -Wsometimes-uninitialized in cpr_scale
        power: avs: qcom-cpr: add unspecified HAS_IOMEM dependency
        PM / AVS: rockchip-io: fix the supply naming for the emmc supply on px30
        power: avs: qcom-cpr: add a printout after the driver has been initialized
    • Linus Torvalds's avatar
      Merge tag 'drm-next-2020-02-07' of git://anongit.freedesktop.org/drm/drm · c16b99d6
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Just some fixes for this merge window: the tegra changes fix some
        regressions in the merge, nouveau has a few modesetting fixes.
        The amdgpu fixes are bit bigger, but they contain a couple of weeks of
        fixes, and don't seem to contain anything that isn't really a fix.
         - merge window regression fixes
         - couple of volta/turing modesetting fixes
         - EDC fixes for Arcturus
         - GDDR6 memory training fixe
         - Fix for reading gfx clockgating registers while in GFXOFF state
         - i2c freq fixes
         - Misc display fixes
         - TLB invalidation fix when using semaphores
         - VCN 2.5 instancing fixes
         - Switch raven1 gfxoff to a blacklist
         - Coreboot workaround for KV/KB
         - Root cause dongle fixes for display and revert workaround
         - Enable GPU reset for renoir and navi
         - Navi overclocking fixes
         - Fix up confusing warnings in display clock validation on raven
         - SDMA fix
         - Misc LUT fixes"
      * tag 'drm-next-2020-02-07' of git://anongit.freedesktop.org/drm/drm: (90 commits)
        gpu: host1x: Set DMA direction only for DMA-mapped buffer objects
        drm/tegra: Reuse IOVA mapping where possible
        drm/tegra: Relax IOMMU usage criteria on old Tegra
        drm/amd/dm/mst: Ignore payload update failures
        drm/amdgpu: update default voltage for boot od table for navi1x
        drm/amdgpu/smu10: fix smu10_get_clock_by_type_with_voltage
        drm/amdgpu/smu10: fix smu10_get_clock_by_type_with_latency
        drm/amdgpu/display: handle multiple numbers of fclks in dcn_calcs.c (v2)
        drm/amdgpu: fetch default VDDC curve voltages (v2)
        drm/amdgpu/smu_v11_0: Correct behavior of restoring default tables (v2)
        drm/amdgpu/navi10: add OD_RANGE for navi overclocking
        drm/amdgpu/navi: fix index for OD MCLK
        drm/amd/display: Fix HW/SW state mismatch
        drm/amd/display: Fix a typo when computing dsc configuration
        drm/amd/powerplay: fix navi10 system intermittent reboot issue V2
        drm/amdkfd: Fix a bug in SDMA RLC queue counting under HWS mode
        drm/amd/display: Only enable cursor on pipes that need it
        drm/nouveau/kms/gv100-: avoid sending a core update until the first modeset
        drm/nouveau/kms/gv100-: move window ownership setup into modesetting path
        drm/nouveau/disp/gv100-: halt NV_PDISP_FE_RM_INTR_STAT_CTRL_DISP_ERROR storms
    • Linus Torvalds's avatar
      Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · 8bf5973a
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "A collection of fixes:
         - Make of_clk.h self contained
         - Fix new qcom DT bindings that just merged to match the DTS files
         - Fix qcom clk driver to properly detect DFS clk frequencies
         - Fix the ls1028a driver to not deref a pointer before assigning it"
      * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        of: clk: Make <linux/of_clk.h> self-contained
        clk: qcom: Use ARRAY_SIZE in videocc-sc7180 for parent clocks
        clk: qcom: Get rid of the test clock for videocc-sc7180
        dt-bindings: clock: Cleanup qcom,videocc bindings for sdm845/sc7180
        clk: qcom: Use ARRAY_SIZE in gpucc-sc7180 for parent clocks
        clk: qcom: Get rid of the test clock for gpucc-sc7180
        dt-bindings: clock: Fix qcom,gpucc bindings for sdm845/sc7180/msm8998
        clk: qcom: Use ARRAY_SIZE in dispcc-sc7180 for parent clocks
        clk: qcom: Get rid of the test clock for dispcc-sc7180
        clk: qcom: Get rid of fallback global names for dispcc-sc7180
        dt-bindings: clock: Fix qcom,dispcc bindings for sdm845/sc7180
        clk: qcom: rcg2: Don't crash if our parent can't be found; return an error
        clk: ls1028a: fix a dereference of pointer 'parent' before a null check
        dt-bindings: clk: qcom: Fix self-validation, split, and clean cruft
        clk: qcom: Don't overwrite 'cfg' in clk_rcg2_dfs_populate_freq()
    • Linus Torvalds's avatar
      Merge tag 'linux-watchdog-5.6-rc1' of git://www.linux-watchdog.org/linux-watchdog · b34f01f7
      Linus Torvalds authored
      Pull watchdog updates from Wim Van Sebroeck:
       - add IT8786 chipset ID
       - addition of sam9x60 compatible watchdog
       - da9062 improvements
       - fix UAF in reboot notifier handling in watchdog core code
       - other fixes and small improvements
      * tag 'linux-watchdog-5.6-rc1' of git://www.linux-watchdog.org/linux-watchdog:
        watchdog: da9062: make restart handler atomic safe
        watchdog: mtk_wdt: mt2712: Add reset controller
        watchdog: mtk_wdt: mt8183: Add reset controller
        dt-bindings: mediatek: mt2712: Add #reset-cells
        dt-bindings: mediatek: mt8183: Add #reset-cells
        dt-bindings: watchdog: da9062: add suspend disable option
        watchdog: it87_wdt: add IT8786 ID
        watchdog: dw_wdt: ping watchdog to reset countdown before start
        watchdog: fix UAF in reboot notifier handling in watchdog core code
        watchdog: cadence: Skip printing pointer value
        watchdog: qcom: Use platform_get_irq_optional() for bark irq
        watchdog: da9062: add power management ops
        watchdog: make DesignWare watchdog allow users to set bigger timeout value
        drivers: watchdog: stm32_iwdg: set WDOG_HW_RUNNING at probe
        watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog
    • Linus Torvalds's avatar
      Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost · e0f121c5
      Linus Torvalds authored
      Pull virtio updates from Michael Tsirkin:
       "Some bug fixes/cleanups.
        The deprecated scsi passthrough for virtio_blk is removed"
      * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
        virtio_balloon: Fix memory leaks on errors in virtballoon_probe()
        virtio-balloon: Fix memory leak when unloading while hinting is in progress
        virtio_balloon: prevent pfn array overflow
        virtio-blk: remove VIRTIO_BLK_F_SCSI support
        virtio-pci: check name when counting MSI-X vectors
        virtio-balloon: initialize all vq callbacks
        virtio-mmio: convert to devm_platform_ioremap_resource
    • Linus Torvalds's avatar
      Merge tag 'xtensa-20200206' of git://github.com/jcmvbkbc/linux-xtensa · 9b7fa288
      Linus Torvalds authored
      Pull xtensa updates from Max Filippov:
       - reorganize exception vectors placement
       - small cleanups (drop unused functions/headers/defconfig entries,
         spelling fixes)
      * tag 'xtensa-20200206' of git://github.com/jcmvbkbc/linux-xtensa:
        xtensa: ISS: improve simcall assembly
        xtensa: reorganize vectors placement
        xtensa: separate SMP and XIP support
        xtensa: move fast exception handlers close to vectors
        arch/xtensa: fix Kconfig typos for HAVE_SMP
        xtensa: clean up optional XCHAL_* definitions
        xtensa: drop unused function fast_coprocessor_double
        xtensa: drop empty platform_* functions from platforms
        xtensa: clean up platform headers
        xtensa: drop set_except_vector declaration
        xtensa: configs: Cleanup old Kconfig IO scheduler options
    • Al Viro's avatar
      tmpfs: switch to use of invalfc() · f35aa2bc
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      cgroup1: switch to use of errorfc() et.al. · 58c025f0
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      procfs: switch to use of invalfc() · bf45f7fc
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      hugetlbfs: switch to use of invalfc() · b5db30cf
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      cramfs: switch to use of errofc() et.al. · e1ee7d85
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      gfs2: switch to use of errorfc() et.al. · 77cb271e
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      fuse: switch to use errorfc() et.al. · 2e28c49e
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
    • Al Viro's avatar
      prefix-handling analogues of errorf() and friends · a3ff937b
      Al Viro authored
      called errorfc/infofc/warnfc/invalfc
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      turn fs_param_is_... into functions · 328de528
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      fs_parse: handle optional arguments sanely · 48ce73b1
      Al Viro authored
      Don't bother with "mixed" options that would allow both the
      form with and without argument (i.e. both -o foo and -o foo=bar).
      Rather than trying to shove both into a single fs_parameter_spec,
      allow having with-argument and no-argument specs with the same
      name and teach fs_parse to handle that.
      There are very few options of that sort, and they are actually
      easier to handle that way - callers end up with less postprocessing.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>