1. 16 Oct, 2015 6 commits
    • Ross Zwisler's avatar
      sh: add copy_user_page() alias for __copy_user() · 934ed25e
      Ross Zwisler authored
      copy_user_page() is needed by DAX.  Without this we get a compile error
      for DAX on SH:
      
        fs/dax.c:280:2: error: implicit declaration of function `copy_user_page' [-Werror=implicit-function-declaration]
          copy_user_page(vto, (void __force *)vfrom, vaddr, to);
            ^
      
      This was done with a random config that happened to include DAX support.
      
      This patch has only been compile tested.
      Signed-off-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
      Reported-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
      Cc: Matthew Wilcox <willy@linux.intel.com>
      Cc: Matt Fleming <matt@codeblueprint.co.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      934ed25e
    • Andrew Morton's avatar
      lib/Kconfig: ZLIB_DEFLATE must select BITREVERSE · 1fd4e5c3
      Andrew Morton authored
      lib/built-in.o: In function `__bitrev32':
      deftree.c:(.text+0x1e799): undefined reference to `byte_rev_table'
      deftree.c:(.text+0x1e7a0): undefined reference to `byte_rev_table'
      deftree.c:(.text+0x1e7b4): undefined reference to `byte_rev_table'
      deftree.c:(.text+0x1e7c1): undefined reference to `byte_rev_table'
      
      Anything which uses bitrevX() has to select BITREVERSE, to grab
      lib/bitrev.o.
      Reported-by: default avatarJim Davis <jim.epost@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1fd4e5c3
    • Ross Zwisler's avatar
      mm, dax: fix DAX deadlocks · 0f90cc66
      Ross Zwisler authored
      The following two locking commits in the DAX code:
      
      commit 84317297 ("dax: fix race between simultaneous faults")
      commit 46c043ed ("mm: take i_mmap_lock in unmap_mapping_range() for DAX")
      
      introduced a number of deadlocks and other issues which need to be fixed
      for the v4.3 kernel.  The list of issues in DAX after these commits
      (some newly introduced by the commits, some preexisting) can be found
      here:
      
        https://lkml.org/lkml/2015/9/25/602 (Subject: "Re: [PATCH] dax: fix deadlock in __dax_fault").
      
      This undoes most of the changes introduced by those two commits,
      essentially returning us to the DAX locking scheme that was used in
      v4.2.
      Signed-off-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
      Cc: Alexander Viro <viro@zeniv.linux.org.uk>
      Cc: Dan Williams <dan.j.williams@intel.com>
      Tested-by: default avatarDave Chinner <dchinner@redhat.com>
      Cc: Jan Kara <jack@suse.com>
      Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
      Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0f90cc66
    • Shaohua Li's avatar
      memcg: convert threshold to bytes · 424cdc14
      Shaohua Li authored
      page_counter_memparse() returns pages for the threshold, while
      mem_cgroup_usage() returns bytes for memory usage.  Convert the
      threshold to bytes.
      
      Fixes: 3e32cb2e ("memcg: rename cgroup_event to mem_cgroup_event").
      Signed-off-by: default avatarShaohua Li <shli@fb.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Acked-by: default avatarMichal Hocko <mhocko@suse.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      424cdc14
    • Riku Voipio's avatar
      builddeb: remove debian/files before build · 8d740a37
      Riku Voipio authored
      Commit 3716001b ("deb-pkg: add source package") added the ability to
      create a debian changelog file.  This exposed that previously the
      builddeb script hasn't cleared debian/files between builds.
      
      As debian/files keeps accumulating entries, the changes file will end up
      growing indefinelty.  With outdated entries in debian/files, builddeb
      script will exit with failure.  This regression impacts those who use
      "make deb-pkg" target to build kernel into a .deb package and never use
      "make mrproper" or other means to clean kernel tree from generated
      directories.
      
      To fix the regression, remove debian/files before starting build and in
      the generated clean rule.
      
      Fixes: 3716001b ("deb-pkg: add source package")
      Signed-off-by: default avatarRiku Voipio <riku.voipio@linaro.org>
      Reported-by: default avatarDoug Smythies <dsmythies@telus.net>
      Tested-by: default avatarDoug Smythies <dsmythies@telus.net>
      Tested-by: default avatarKalle Valo <kvalo@codeaurora.org>
      Acked-by: default avatarBen Hutchings <ben@decadent.org.uk>
      Cc: Michal Marek <mmarek@suse.cz>
      Cc: maximilian attems <maks@stro.at>
      Cc: Chris J Arges <chris.j.arges@canonical.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8d740a37
    • Michal Hocko's avatar
      mm, fs: obey gfp_mapping for add_to_page_cache() · 063d99b4
      Michal Hocko authored
      Commit 6afdb859 ("mm: do not ignore mapping_gfp_mask in page cache
      allocation paths") has caught some users of hardcoded GFP_KERNEL used in
      the page cache allocation paths.  This, however, wasn't complete and
      there were others which went unnoticed.
      
      Dave Chinner has reported the following deadlock for xfs on loop device:
      : With the recent merge of the loop device changes, I'm now seeing
      : XFS deadlock on my single CPU, 1GB RAM VM running xfs/073.
      :
      : The deadlocked is as follows:
      :
      : kloopd1: loop_queue_read_work
      :       xfs_file_iter_read
      :       lock XFS inode XFS_IOLOCK_SHARED (on image file)
      :       page cache read (GFP_KERNEL)
      :       radix tree alloc
      :       memory reclaim
      :       reclaim XFS inodes
      :       log force to unpin inodes
      :       <wait for log IO completion>
      :
      : xfs-cil/loop1: <does log force IO work>
      :       xlog_cil_push
      :       xlog_write
      :       <loop issuing log writes>
      :               xlog_state_get_iclog_space()
      :               <blocks due to all log buffers under write io>
      :               <waits for IO completion>
      :
      : kloopd1: loop_queue_write_work
      :       xfs_file_write_iter
      :       lock XFS inode XFS_IOLOCK_EXCL (on image file)
      :       <wait for inode to be unlocked>
      :
      : i.e. the kloopd, with it's split read and write work queues, has
      : introduced a dependency through memory reclaim. i.e. that writes
      : need to be able to progress for reads make progress.
      :
      : The problem, fundamentally, is that mpage_readpages() does a
      : GFP_KERNEL allocation, rather than paying attention to the inode's
      : mapping gfp mask, which is set to GFP_NOFS.
      :
      : The didn't used to happen, because the loop device used to issue
      : reads through the splice path and that does:
      :
      :       error = add_to_page_cache_lru(page, mapping, index,
      :                       GFP_KERNEL & mapping_gfp_mask(mapping));
      
      This has changed by commit aa4d8616 ("block: loop: switch to VFS
      ITER_BVEC").
      
      This patch changes mpage_readpage{s} to follow gfp mask set for the
      mapping.  There are, however, other places which are doing basically the
      same.
      
      lustre:ll_dir_filler is doing GFP_KERNEL from the function which
      apparently uses GFP_NOFS for other allocations so let's make this
      consistent.
      
      cifs:readpages_get_pages is called from cifs_readpages and
      __cifs_readpages_from_fscache called from the same path obeys mapping
      gfp.
      
      ramfs_nommu_expand_for_mapping is hardcoding GFP_KERNEL as well
      regardless it uses mapping_gfp_mask for the page allocation.
      
      ext4_mpage_readpages is the called from the page cache allocation path
      same as read_pages and read_cache_pages
      
      As I've noticed in my previous post I cannot say I would be happy about
      sprinkling mapping_gfp_mask all over the place and it sounds like we
      should drop gfp_mask argument altogether and use it internally in
      __add_to_page_cache_locked that would require all the filesystems to use
      mapping gfp consistently which I am not sure is the case here.  From a
      quick glance it seems that some file system use it all the time while
      others are selective.
      Signed-off-by: default avatarMichal Hocko <mhocko@suse.com>
      Reported-by: default avatarDave Chinner <david@fromorbit.com>
      Cc: "Theodore Ts'o" <tytso@mit.edu>
      Cc: Ming Lei <ming.lei@canonical.com>
      Cc: Andreas Dilger <andreas.dilger@intel.com>
      Cc: Oleg Drokin <oleg.drokin@intel.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Christoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      063d99b4
  2. 13 Oct, 2015 5 commits
    • Linus Torvalds's avatar
      Merge tag 'nfsd-4.3-2' of git://linux-nfs.org/~bfields/linux · 5b5f1455
      Linus Torvalds authored
      Pull nfsd fixes from Bruce Fields:
       "Two nfsd fixes, one for an RDMA crash, one for a pnfs/block protocol
        bug"
      
      * tag 'nfsd-4.3-2' of git://linux-nfs.org/~bfields/linux:
        svcrdma: Fix NFS server crash triggered by 1MB NFS WRITE
        nfsd/blocklayout: accept any minlength
      5b5f1455
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 6006d452
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
       "This fixes the following issues:
      
         - Fix AVX detection to prevent use of non-existent AESNI.
      
         - Some SPARC ciphers did not set their IV size which may lead to
           memory corruption"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: ahash - ensure statesize is non-zero
        crypto: camellia_aesni_avx - Fix CPU feature checks
        crypto: sparc - initialize blkcipher.ivsize
      6006d452
    • Linus Torvalds's avatar
      Merge tag 'iommu-fixes-v4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 75542253
      Linus Torvalds authored
      Pull IOMMU fixes from Joerg Roedel:
       "A few fixes piled up:
      
         - Fix for a suspend/resume issue where PCI probing code overwrote
           dev->irq for the MSI irq of the AMD IOMMU.
      
         - Fix for a kernel crash when a 32 bit PCI device was assigned to a
           KVM guest.
      
         - Fix for a possible memory leak in the VT-d driver
      
         - A couple of fixes for the ARM-SMMU driver"
      
      * tag 'iommu-fixes-v4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
        iommu/amd: Fix NULL pointer deref on device detach
        iommu/amd: Prevent binding other PCI drivers to IOMMU PCI devices
        iommu/vt-d: Fix memory leak in dmar_insert_one_dev_info()
        iommu/arm-smmu: Use correct address mask for CMD_TLBI_S2_IPA
        iommu/arm-smmu: Ensure IAS is set correctly for AArch32-capable SMMUs
        iommu/io-pgtable-arm: Don't use dma_to_phys()
      75542253
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 06d1ee32
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "I got a bit behind last week, so here is a delayed fixes pull:
      
         - a bunch of radeon/amd gpu fixes
         - some nouveau regression fixes (ppc bios reading and runtime pm fix)
         - one drm core oops fix
         - two qxl locking fixes
         - one qxl regression fix"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/nouveau/bios: fix OF loading
        drm/nouveau/fbcon: take runpm reference when userspace has an open fd
        drm/nouveau/nouveau: Disable AGP for SiS 761
        drm/nouveau/display: allow up to 16k width/height for fermi+
        drm/nouveau/bios: translate devinit pri/sec i2c bus to internal identifiers
        drm: Fix locking for sysfs dpms file
        drm/amdgpu: fix memory leak in amdgpu_vm_update_page_directory
        drm/amdgpu: fix 32-bit compiler warning
        drm/qxl: avoid dependency lock
        drm/qxl: avoid buffer reservation in qxl_crtc_page_flip
        drm/qxl: fix framebuffer dirty rectangle tracking.
        drm/amdgpu: flag iceland as experimental
        drm/amdgpu: check before checking pci bridge registers
        drm/amdgpu: fix num_crtc on CZ
        drm/amdgpu: restore the fbdev mode in lastclose
        drm/radeon: restore the fbdev mode in lastclose
        drm/radeon: add quirk for ASUS R7 370
        drm/amdgpu: add pm sysfs files late
        drm/radeon: add pm sysfs files late
      06d1ee32
    • Russell King's avatar
      crypto: ahash - ensure statesize is non-zero · 8996eafd
      Russell King authored
      Unlike shash algorithms, ahash drivers must implement export
      and import as their descriptors may contain hardware state and
      cannot be exported as is.  Unfortunately some ahash drivers did
      not provide them and end up causing crashes with algif_hash.
      
      This patch adds a check to prevent these drivers from registering
      ahash algorithms until they are fixed.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      8996eafd
  3. 12 Oct, 2015 7 commits
  4. 11 Oct, 2015 8 commits
  5. 10 Oct, 2015 12 commits
  6. 09 Oct, 2015 2 commits
    • Linus Torvalds's avatar
      Merge tag 'dm-4.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · 04445556
      Linus Torvalds authored
      Pull dm fixes from Mike Snitzer:
       "Three stable fixes:
      
         - DM core AB-BA deadlock fix in the device destruction path (vs
           device creation's DM table swap).
      
         - DM raid fix to properly round up the region_size to the next
           power-of-2.
      
         - DM cache fix for a NULL pointer seen while switching from the
           "cleaner" cache policy.
      
        Two fixes for regressions introduced during the 4.3 merge:
      
         - request-based DM error propagation regressed due to incorrect
           changes introduced when adding the bi_error field to bio.
      
         - DM snapshot fix to only support snapshots that overflow if the
           client (e.g. lvm2) is prepared to deal with the associated
           snapshot status interface change"
      
      * tag 'dm-4.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
        dm snapshot: add new persistent store option to support overflow
        dm cache: fix NULL pointer when switching from cleaner policy
        dm: fix request-based dm error reporting
        dm raid: fix round up of default region size
        dm: fix AB-BA deadlock in __dm_destroy()
      04445556
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 175d58cf
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "These are small and assorted.  Neil's is the oldest, I dropped the
        ball thinking he was going to send it in"
      
      * 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: support NFSv2 export
        Btrfs: open_ctree: Fix possible memory leak
        Btrfs: fix deadlock when finalizing block group creation
        Btrfs: update fix for read corruption of compressed and shared extents
        Btrfs: send, fix corner case for reference overwrite detection
      175d58cf