1. 12 Sep, 2016 15 commits
    • Russell King's avatar
      ARM: pxa/lubbock: add pcmcia clock · 1a57c286
      Russell King authored
      Add the required PCMCIA clock for the SA1111 "1800" device.  This clock
      is used to compute timing information for the PCMCIA interface in the
      SoC device, rather than the SA1111.  Hence, the provision of this clock
      is a convenience for the driver and does not reflect the hardware, so
      this must not be copied into DT.
      Acked-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      Tested-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      1a57c286
    • Russell King's avatar
      ARM: locomo: fix locomo irq handling · 07f56e66
      Russell King authored
      Accidentally booting Collie on Assabet reveals that the locomo driver
      incorrectly overwrites gpio-sa1100's chip data for its parent interrupt,
      leading to oops in sa1100_gpio_unmask() and sa1100_update_edge_regs()
      when "gpio: sa1100: convert to use IO accessors" is applied.  Fix locomo
      to use the handler data rather than chip data for its parent interrupt.
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      07f56e66
    • Stefan Agner's avatar
      ARM: 8612/1: LPAE: initialize cache policy correctly · 6b3142b2
      Stefan Agner authored
      The cachepolicy variable gets initialized using a masked pmd
      value. So far, the pmd has been masked with flags valid for the
      2-page table format, but the 3-page table format requires a
      different mask. On LPAE, this lead to a wrong assumption of what
      initial cache policy has been used. Later a check forces the
      cache policy to writealloc and prints the following warning:
      Forcing write-allocate cache policy for SMP
      
      This patch introduces a new definition PMD_SECT_CACHE_MASK for
      both page table formats which masks in all cache flags in both
      cases.
      Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      6b3142b2
    • Russell King's avatar
    • Russell King's avatar
      ARM: sa1111: fix missing clk_disable() · 87d5dd62
      Russell King authored
      SA1111 forgets to call clk_disable() in the probe error cleanup path.
      Add the necessary call.
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      87d5dd62
    • Russell King's avatar
      ARM: sa1111: fix pcmcia suspend/resume · 06dfe5cc
      Russell King authored
      SA1111 PCMCIA was broken when PCMCIA switched to using dev_pm_ops for
      the PCMCIA socket class.  PCMCIA used to handle suspend/resume via the
      socket hosting device, which happened at normal device suspend/resume
      time.
      
      However, the referenced commit changed this: much of the resume now
      happens much earlier, in the noirq resume handler of dev_pm_ops.
      
      However, on SA1111, the PCMCIA device is not accessible as the SA1111
      has not been resumed at _noirq time.  It's slightly worse than that,
      because the SA1111 has already been put to sleep at _noirq time, so
      suspend doesn't work properly.
      
      Fix this by converting the core SA1111 code to use dev_pm_ops as well,
      and performing its own suspend/resume at noirq time.
      
      This fixes these errors in the kernel log:
      
      pcmcia_socket pcmcia_socket0: time out after reset
      pcmcia_socket pcmcia_socket1: time out after reset
      
      and the resulting lack of PCMCIA cards after a S2RAM cycle.
      
      Fixes: d7646f76 ("pcmcia: use dev_pm_ops for class pcmcia_socket_class")
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      06dfe5cc
    • Russell King's avatar
      ARM: sa1111: fix pcmcia interrupt mask polarity · 7c0091ec
      Russell King authored
      The polarity of the high IRQs was being calculated using
      SA1111_IRQMASK_HI(), but this assumes a Linux interrupt number, not a
      hardware interrupt number.  Hence, the resulting mask was incorrect.
      Fix this.
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      7c0091ec
    • Russell King's avatar
      ARM: sa1111: fix error code propagation in sa1111_probe() · cb034407
      Russell King authored
      Ensure that we propagate the platform_get_irq() error code out of the
      probe function.  This allows probe deferrals to work correctly should
      platform_get_irq() not be able to resolve the interrupt in a DT
      environment at probe time.
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      cb034407
    • Robert Jarzmik's avatar
      pcmcia: lubbock: fix sockets configuration · 817ed574
      Robert Jarzmik authored
      On lubbock board, the probe of the driver crashes by dereferencing very
      early a platform_data structure which is not set, in
      pxa2xx_configure_sockets().
      
      The stack fixed is :
      [    0.244353] SA1111 Microprocessor Companion Chip: silicon revision 1, metal revision 1
      [    0.256321] sa1111 sa1111: Providing IRQ336-390
      [    0.340899] clocksource: Switched to clocksource oscr0
      [    0.472263] Unable to handle kernel NULL pointer dereference at virtual address 00000004
      [    0.480469] pgd = c0004000
      [    0.483432] [00000004] *pgd=00000000
      [    0.487105] Internal error: Oops: f5 [#1] ARM
      [    0.491497] Modules linked in:
      [    0.494650] CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-rc3-00080-g1aaa68426f0c-dirty #2068
      [    0.503229] Hardware name: Intel DBPXA250 Development Platform (aka Lubbock)
      [    0.510344] task: c3e42000 task.stack: c3e44000
      [    0.514984] PC is at pxa2xx_configure_sockets+0x4/0x24 (drivers/pcmcia/pxa2xx_base.c:227)
      [    0.520193] LR is at pcmcia_lubbock_init+0x1c/0x38
      [    0.525079] pc : [<c0247c30>]    lr : [<c02479b0>]    psr: a0000053
      [    0.525079] sp : c3e45e70  ip : 100019ff  fp : 00000000
      [    0.536651] r10: c0828900  r9 : c0434838  r8 : 00000000
      [    0.541953] r7 : c0820700  r6 : c0857b30  r5 : c3ec1400  r4 : c0820758
      [    0.548549] r3 : 00000000  r2 : 0000000c  r1 : c3c09c40  r0 : c3ec1400
      [    0.555154] Flags: NzCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment none
      [    0.562450] Control: 0000397f  Table: a0004000  DAC: 00000053
      [    0.568257] Process swapper (pid: 1, stack limit = 0xc3e44190)
      [    0.574154] Stack: (0xc3e45e70 to 0xc3e46000)
      [    0.578610] 5e60:                                     c4849800 00000000 c3ec1400 c024769c
      [    0.586928] 5e80: 00000000 c3ec140c c3c0ee0c c3ec1400 c3ec1434 c020c410 c3ec1400 c3ec1434
      [    0.595244] 5ea0: c0820700 c080b408 c0828900 c020c5f8 00000000 c0820700 c020c578 c020ac5c
      [    0.603560] 5ec0: c3e687cc c3e71e10 c0820700 00000000 c3c02de0 c020bae4 c03c62f7 c03c62f7
      [    0.611872] 5ee0: c3e68780 c0820700 c042e034 00000000 c043c440 c020cdec c080b408 00000005
      [    0.620188] 5f00: c042e034 c00096c0 c0034440 c01c730c 20000053 ffffffff 00000000 00000000
      [    0.628502] 5f20: 00000000 c3ffcb87 c3ffcb90 c00346ac c3e66ba0 c03f7914 00000092 00000005
      [    0.636811] 5f40: 00000005 c03f847c 00000091 c03f847c 00000000 00000005 c0434828 00000005
      [    0.645125] 5f60: c043482c 00000092 c043c440 c0828900 c0434838 c0418d2c 00000005 00000005
      [    0.653430] 5f80: 00000000 c041858c 00000000 c032e9f0 00000000 00000000 00000000 00000000
      [    0.661729] 5fa0: 00000000 c032e9f8 00000000 c000f0f0 00000000 00000000 00000000 00000000
      [    0.670020] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
      [    0.678311] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
      [    0.686673] (pxa2xx_configure_sockets) from pcmcia_lubbock_init (/drivers/pcmcia/sa1111_lubbock.c:161)
      [    0.696026] (pcmcia_lubbock_init) from pcmcia_probe (/drivers/pcmcia/sa1111_generic.c:213)
      [    0.704358] (pcmcia_probe) from driver_probe_device (/drivers/base/dd.c:378 /drivers/base/dd.c:499)
      [    0.712848] (driver_probe_device) from __driver_attach (/./include/linux/device.h:983 /drivers/base/dd.c:733)
      [    0.721414] (__driver_attach) from bus_for_each_dev (/drivers/base/bus.c:313)
      [    0.729723] (bus_for_each_dev) from bus_add_driver (/drivers/base/bus.c:708)
      [    0.738036] (bus_add_driver) from driver_register (/drivers/base/driver.c:169)
      [    0.746185] (driver_register) from do_one_initcall (/init/main.c:778)
      [    0.754561] (do_one_initcall) from kernel_init_freeable (/init/main.c:843 /init/main.c:851 /init/main.c:869 /init/main.c:1016)
      [    0.763409] (kernel_init_freeable) from kernel_init (/init/main.c:944)
      [    0.771660] (kernel_init) from ret_from_fork (/arch/arm/kernel/entry-common.S:119)
      [ 0.779347] Code: c03c6305 c03c631e c03c632e e5903048 (e993000c)
      All code
      ========
         0:	c03c6305 	eorsgt	r6, ip, r5, lsl #6
         4:	c03c631e 	eorsgt	r6, ip, lr, lsl r3
         8:	c03c632e 	eorsgt	r6, ip, lr, lsr #6
         c:	e5903048 	ldr	r3, [r0, #72]	; 0x48
        10:*	e993000c 	ldmib	r3, {r2, r3}		<-- trapping instruction
      Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      817ed574
    • Russell King's avatar
      pcmcia: sa1111: fix propagation of lowlevel board init return code · 3f8df892
      Russell King authored
      When testing Lubbock, it was noticed that the sa1111 pcmcia driver bound
      but was not functional due to no sockets being registered.  This is
      because the return code from the lowlevel board initialisation was not
      being propagated out of the probe function.  Fix this.
      Tested-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      3f8df892
    • Russell King's avatar
      pcmcia: soc_common: fix SS_STSCHG polarity · a466ebd2
      Russell King authored
      SS_STSCHG should be set for an IO card when the BVD1 signal is asserted
      low, not high.
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      a466ebd2
    • Russell King's avatar
      pcmcia: sa11xx_base: add units to the timing information · cbd5a168
      Russell King authored
      Add units to the timing information, so we know that the numbers are
      nanoseconds.  The output changes from:
      
      I/O      : 165 (172)
      attribute: 300 (316)
      common   : 300 (316)
      
      to:
      
      I/O      : 165ns (172ns)
      attribute: 300ns (316ns)
      common   : 300ns (316ns)
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      cbd5a168
    • Russell King's avatar
      pcmcia: sa11xx_base: fix reporting of timing information · 6dec04e8
      Russell King authored
      Fix the reporting of the currently programmed timing information.  These
      entries have been showing zero due to the clock rate being a factor of
      1000 too big.  With this change, we go from:
      
      I/O      : 165 (0)
      attribute: 300 (0)
      common   : 300 (0)
      
      to:
      
      I/O      : 165 (172)
      attribute: 300 (316)
      common   : 300 (316)
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      6dec04e8
    • Russell King's avatar
      pcmcia: ds: fix suspend/resume · ad8d52b8
      Russell King authored
      PCMCIA suspend/resume no longer works since the commit mentioned below,
      as the callbacks are no longer made.  Convert the driver to the new
      dev_pm_ops, which restores the suspend/resume functionality.  Tested on
      the arm arch Assabet platform.
      
      Fixes: aa8e54b5 ("PM / sleep: Go direct_complete if driver has no callbacks")
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      ad8d52b8
    • Linus Torvalds's avatar
      Linux 4.8-rc6 · 9395452b
      Linus Torvalds authored
      9395452b
  2. 11 Sep, 2016 3 commits
    • Linus Torvalds's avatar
      nvme: make NVME_RDMA depend on BLOCK · bd0b841f
      Linus Torvalds authored
      Commit aa719874 ("nvme: fabrics drivers don't need the nvme-pci
      driver") removed the dependency on BLK_DEV_NVME, but the cdoe does
      depend on the block layer (which used to be an implicit dependency
      through BLK_DEV_NVME).
      
      Otherwise you get various errors from the kbuild test robot random
      config testing when that happens to hit a configuration with BLOCK
      device support disabled.
      
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Jay Freyensee <james_p_freyensee@linux.intel.com>
      Cc: Sagi Grimberg <sagi@grimberg.me>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      bd0b841f
    • Linus Torvalds's avatar
      Merge tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 2afe669a
      Linus Torvalds authored
      Pull IIO fixes from Greg KH:
       "Here are a few small IIO fixes for 4.8-rc6.
      
        Nothing major, full details are in the shortlog, all of these have
        been in linux-next with no reported issues"
      
      * tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        iio:core: fix IIO_VAL_FRACTIONAL sign handling
        iio: ensure ret is initialized to zero before entering do loop
        iio: accel: kxsd9: Fix scaling bug
        iio: accel: bmc150: reset chip at init time
        iio: fix pressure data output unit in hid-sensor-attributes
        tools:iio:iio_generic_buffer: fix trigger-less mode
      2afe669a
    • Linus Torvalds's avatar
      Merge tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 61c3dae6
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some small USB gadget, phy, and xhci fixes for 4.8-rc6.
      
        All of these resolve minor issues that have been reported, and all
        have been in linux-next with no reported issues"
      
      * tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: chipidea: udc: fix NULL ptr dereference in isr_setup_status_phase
        xhci: fix null pointer dereference in stop command timeout function
        usb: dwc3: pci: fix build warning on !PM_SLEEP
        usb: gadget: prevent potenial null pointer dereference on skb->len
        usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
        usb: phy: phy-generic: Check clk_prepare_enable() error
        usb: gadget: udc: renesas-usb3: clear VBOUT bit in DRD_CON
        Revert "usb: dwc3: gadget: always decrement by 1"
      61c3dae6
  3. 10 Sep, 2016 10 commits
    • Linus Torvalds's avatar
      Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 98ac9a60
      Linus Torvalds authored
      Pull libnvdimm fixes from Dan Williams:
       "nvdimm fixes for v4.8, two of them are tagged for -stable:
      
         - Fix devm_memremap_pages() to use track_pfn_insert().  Otherwise,
           DAX pmd mappings end up with an uncached pgprot, and unusable
           performance for the device-dax interface.  The device-dax interface
           appeared in 4.7 so this is tagged for -stable.
      
         - Fix a couple VM_BUG_ON() checks in the show_smaps() path to
           understand DAX pmd entries.  This fix is tagged for -stable.
      
         - Fix a mis-merge of the nfit machine-check handler to flip the
           polarity of an if() to match the final version of the patch that
           Vishal sent for 4.8-rc1.  Without this the nfit machine check
           handler never detects / inserts new 'badblocks' entries which
           applications use to identify lost portions of files.
      
         - For test purposes, fix the nvdimm_clear_poison() path to operate on
           legacy / simulated nvdimm memory ranges.  Without this fix a test
           can set badblocks, but never clear them on these ranges.
      
         - Fix the range checking done by dax_dev_pmd_fault().  This is not
           tagged for -stable since this problem is mitigated by specifying
           aligned resources at device-dax setup time.
      
        These patches have appeared in a next release over the past week.  The
        recent rebase you can see in the timestamps was to drop an invalid fix
        as identified by the updated device-dax unit tests [1].  The -mm
        touches have an ack from Andrew"
      
      [1]: "[ndctl PATCH 0/3] device-dax test for recent kernel bugs"
         https://lists.01.org/pipermail/linux-nvdimm/2016-September/006855.html
      
      * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
        libnvdimm: allow legacy (e820) pmem region to clear bad blocks
        nfit, mce: Fix SPA matching logic in MCE handler
        mm: fix cache mode of dax pmd mappings
        mm: fix show_smap() for zone_device-pmd ranges
        dax: fix mapping size check
      98ac9a60
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · b8db3714
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Mostly driver bugfixes, but also a few cleanups which are nice to have
        out of the way"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: rk3x: Restore clock settings at resume time
        i2c: Spelling s/acknowedge/acknowledge/
        i2c: designware: save the preset value of DW_IC_SDA_HOLD
        Documentation: i2c: slave-interface: add note for driver development
        i2c: mux: demux-pinctrl: run properly with multiple instances
        i2c: bcm-kona: fix inconsistent indenting
        i2c: rcar: use proper device with dma_mapping_error
        i2c: sh_mobile: use proper device with dma_mapping_error
        i2c: mux: demux-pinctrl: invalidate properly when switching fails
      b8db3714
    • Linus Torvalds's avatar
      Merge tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 6905732c
      Linus Torvalds authored
      Pull fscrypto fixes fromTed Ts'o:
       "Fix some brown-paper-bag bugs for fscrypto, including one one which
        allows a malicious user to set an encryption policy on an empty
        directory which they do not own"
      
      * tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        fscrypto: require write access to mount to set encryption policy
        fscrypto: only allow setting encryption policy on directories
        fscrypto: add authorization check for setting encryption policy
      6905732c
    • Eric Biggers's avatar
      fscrypto: require write access to mount to set encryption policy · ba63f23d
      Eric Biggers authored
      Since setting an encryption policy requires writing metadata to the
      filesystem, it should be guarded by mnt_want_write/mnt_drop_write.
      Otherwise, a user could cause a write to a frozen or readonly
      filesystem.  This was handled correctly by f2fs but not by ext4.  Make
      fscrypt_process_policy() handle it rather than relying on the filesystem
      to get it right.
      Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
      Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Acked-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
      ba63f23d
    • Eric Biggers's avatar
      fscrypto: only allow setting encryption policy on directories · 002ced4b
      Eric Biggers authored
      The FS_IOC_SET_ENCRYPTION_POLICY ioctl allowed setting an encryption
      policy on nondirectory files.  This was unintentional, and in the case
      of nonempty regular files did not behave as expected because existing
      data was not actually encrypted by the ioctl.
      
      In the case of ext4, the user could also trigger filesystem errors in
      ->empty_dir(), e.g. due to mismatched "directory" checksums when the
      kernel incorrectly tried to interpret a regular file as a directory.
      
      This bug affected ext4 with kernels v4.8-rc1 or later and f2fs with
      kernels v4.6 and later.  It appears that older kernels only permitted
      directories and that the check was accidentally lost during the
      refactoring to share the file encryption code between ext4 and f2fs.
      
      This patch restores the !S_ISDIR() check that was present in older
      kernels.
      Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      002ced4b
    • Eric Biggers's avatar
      fscrypto: add authorization check for setting encryption policy · 163ae1c6
      Eric Biggers authored
      On an ext4 or f2fs filesystem with file encryption supported, a user
      could set an encryption policy on any empty directory(*) to which they
      had readonly access.  This is obviously problematic, since such a
      directory might be owned by another user and the new encryption policy
      would prevent that other user from creating files in their own directory
      (for example).
      
      Fix this by requiring inode_owner_or_capable() permission to set an
      encryption policy.  This means that either the caller must own the file,
      or the caller must have the capability CAP_FOWNER.
      
      (*) Or also on any regular file, for f2fs v4.6 and later and ext4
          v4.8-rc1 and later; a separate bug fix is coming for that.
      Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
      Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      163ae1c6
    • Dave Jiang's avatar
      libnvdimm: allow legacy (e820) pmem region to clear bad blocks · 1e8b8d96
      Dave Jiang authored
      Bad blocks can be injected via /sys/block/pmemN/badblocks. In a situation
      where legacy pmem is being used or a pmem region created by using memmap
      kernel parameter, the injected bad blocks are not cleared due to
      nvdimm_clear_poison() failing from lack of ndctl function pointer. In
      this case we need to just return as handled and allow the bad blocks to
      be cleared rather than fail.
      Reviewed-by: default avatarVishal Verma <vishal.l.verma@intel.com>
      Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      1e8b8d96
    • Vishal Verma's avatar
      nfit, mce: Fix SPA matching logic in MCE handler · 2e21807d
      Vishal Verma authored
      The check for a 'pmem' type SPA in the MCE handler was inverted due to a
      merge/rebase error.
      
      Fixes: 6839a6d9 nfit: do an ARS scrub on hitting a latent media error
      Cc: linux-acpi@vger.kernel.org
      Cc: Dan Williams <dan.j.williams@intel.com>
      Signed-off-by: default avatarVishal Verma <vishal.l.verma@intel.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      2e21807d
    • Dan Williams's avatar
      mm: fix cache mode of dax pmd mappings · 9049771f
      Dan Williams authored
      track_pfn_insert() in vmf_insert_pfn_pmd() is marking dax mappings as
      uncacheable rendering them impractical for application usage.  DAX-pte
      mappings are cached and the goal of establishing DAX-pmd mappings is to
      attain more performance, not dramatically less (3 orders of magnitude).
      
      track_pfn_insert() relies on a previous call to reserve_memtype() to
      establish the expected page_cache_mode for the range.  While memremap()
      arranges for reserve_memtype() to be called, devm_memremap_pages() does
      not.  So, teach track_pfn_insert() and untrack_pfn() how to handle
      tracking without a vma, and arrange for devm_memremap_pages() to
      establish the write-back-cache reservation in the memtype tree.
      
      Cc: <stable@vger.kernel.org>
      Cc: Matthew Wilcox <mawilcox@microsoft.com>
      Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
      Cc: Nilesh Choudhury <nilesh.choudhury@oracle.com>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Reported-by: default avatarToshi Kani <toshi.kani@hpe.com>
      Reported-by: default avatarKai Zhang <kai.ka.zhang@oracle.com>
      Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      9049771f
    • Dan Williams's avatar
      mm: fix show_smap() for zone_device-pmd ranges · ca120cf6
      Dan Williams authored
      Attempting to dump /proc/<pid>/smaps for a process with pmd dax mappings
      currently results in the following VM_BUG_ONs:
      
       kernel BUG at mm/huge_memory.c:1105!
       task: ffff88045f16b140 task.stack: ffff88045be14000
       RIP: 0010:[<ffffffff81268f9b>]  [<ffffffff81268f9b>] follow_trans_huge_pmd+0x2cb/0x340
       [..]
       Call Trace:
        [<ffffffff81306030>] smaps_pte_range+0xa0/0x4b0
        [<ffffffff814c2755>] ? vsnprintf+0x255/0x4c0
        [<ffffffff8123c46e>] __walk_page_range+0x1fe/0x4d0
        [<ffffffff8123c8a2>] walk_page_vma+0x62/0x80
        [<ffffffff81307656>] show_smap+0xa6/0x2b0
      
       kernel BUG at fs/proc/task_mmu.c:585!
       RIP: 0010:[<ffffffff81306469>]  [<ffffffff81306469>] smaps_pte_range+0x499/0x4b0
       Call Trace:
        [<ffffffff814c2795>] ? vsnprintf+0x255/0x4c0
        [<ffffffff8123c46e>] __walk_page_range+0x1fe/0x4d0
        [<ffffffff8123c8a2>] walk_page_vma+0x62/0x80
        [<ffffffff81307696>] show_smap+0xa6/0x2b0
      
      These locations are sanity checking page flags that must be set for an
      anonymous transparent huge page, but are not set for the zone_device
      pages associated with dax mappings.
      
      Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      ca120cf6
  4. 09 Sep, 2016 12 commits