Eric Lee / smarc-fsl-linux-kernel

03 Mar, 2018

1 commit

  • 647a37ec1   mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()' ... Browse Code »

    [ Upstream commit 1f704fd0d14043e76e80f6b8b2251b9b2cedcca6 ]

    A semaphore is acquired before this check, so we must release it before
    leaving.

    Link: http://lkml.kernel.org/r/20171211211009.4971-1-christophe.jaillet@wanadoo.fr
    Fixes: b7f0554a56f2 ("mm: fail get_vaddr_frames() for filesystem-dax mappings")
    Signed-off-by: Christophe JAILLET
    Acked-by: Michal Hocko
    Cc: Dan Williams
    Cc: Christian Borntraeger
    Cc: David Sterba
    Cc: Greg Kroah-Hartman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds
    Signed-off-by: Sasha Levin
    Signed-off-by: Greg Kroah-Hartman

    Christophe JAILLET
     

05 Dec, 2017

1 commit

  • daac04573   mm: fail get_vaddr_frames() for filesystem-dax mappings ... Browse Code »

    commit b7f0554a56f21fb3e636a627450a9add030889be upstream.

    Until there is a solution to the dma-to-dax vs truncate problem it is
    not safe to allow V4L2, Exynos, and other frame vector users to create
    long standing / irrevocable memory registrations against filesytem-dax
    vmas.

    [dan.j.williams@intel.com: add comment for vma_is_fsdax() check in get_vaddr_frames(), per Jan]
    Link: http://lkml.kernel.org/r/151197874035.26211.4061781453123083667.stgit@dwillia2-desk3.amr.corp.intel.com
    Link: http://lkml.kernel.org/r/151068939985.7446.15684639617389154187.stgit@dwillia2-desk3.amr.corp.intel.com
    Fixes: 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings")
    Signed-off-by: Dan Williams
    Reviewed-by: Jan Kara
    Cc: Inki Dae
    Cc: Seung-Woo Kim
    Cc: Joonyoung Shim
    Cc: Kyungmin Park
    Cc: Mauro Carvalho Chehab
    Cc: Mel Gorman
    Cc: Vlastimil Babka
    Cc: Christoph Hellwig
    Cc: Doug Ledford
    Cc: Hal Rosenstock
    Cc: Jason Gunthorpe
    Cc: Jeff Moyer
    Cc: Ross Zwisler
    Cc: Sean Hefty
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds
    Signed-off-by: Greg Kroah-Hartman

    Dan Williams
     

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

09 May, 2017

1 commit

  • 752ade68c   treewide: use kv[mz]alloc* rather than opencoded variants ... Browse Code »

    There are many code paths opencoding kvmalloc. Let's use the helper
    instead. The main difference to kvmalloc is that those users are
    usually not considering all the aspects of the memory allocator. E.g.
    allocation requests
    Reviewed-by: Boris Ostrovsky # Xen bits
    Acked-by: Kees Cook
    Acked-by: Vlastimil Babka
    Acked-by: Andreas Dilger # Lustre
    Acked-by: Christian Borntraeger # KVM/s390
    Acked-by: Dan Williams # nvdim
    Acked-by: David Sterba # btrfs
    Acked-by: Ilya Dryomov # Ceph
    Acked-by: Tariq Toukan # mlx4
    Acked-by: Leon Romanovsky # mlx5
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Herbert Xu
    Cc: Anton Vorontsov
    Cc: Colin Cross
    Cc: Tony Luck
    Cc: "Rafael J. Wysocki"
    Cc: Ben Skeggs
    Cc: Kent Overstreet
    Cc: Santosh Raspatur
    Cc: Hariprasad S
    Cc: Yishai Hadas
    Cc: Oleg Drokin
    Cc: "Yan, Zheng"
    Cc: Alexander Viro
    Cc: Alexei Starovoitov
    Cc: Eric Dumazet
    Cc: David Miller
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Michal Hocko
     

19 Oct, 2016

2 commits

16 Feb, 2016

1 commit

  • d4edcf0d5   mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm ... Browse Code »

    We will soon modify the vanilla get_user_pages() so it can no
    longer be used on mm/tasks other than 'current/current->mm',
    which is by far the most common way it is called. For now,
    we allow the old-style calls, but warn when they are used.
    (implemented in previous patch)

    This patch switches all callers of:

    get_user_pages()
    get_user_pages_unlocked()
    get_user_pages_locked()

    to stop passing tsk/mm so they will no longer see the warnings.

    Signed-off-by: Dave Hansen
    Reviewed-by: Thomas Gleixner
    Cc: Andrea Arcangeli
    Cc: Andrew Morton
    Cc: Andy Lutomirski
    Cc: Borislav Petkov
    Cc: Brian Gerst
    Cc: Dave Hansen
    Cc: Denys Vlasenko
    Cc: H. Peter Anvin
    Cc: Kirill A. Shutemov
    Cc: Linus Torvalds
    Cc: Naoya Horiguchi
    Cc: Peter Zijlstra
    Cc: Rik van Riel
    Cc: Srikar Dronamraju
    Cc: Vlastimil Babka
    Cc: jack@suse.cz
    Cc: linux-mm@kvack.org
    Link: http://lkml.kernel.org/r/20160212210156.113E9407@viggo.jf.intel.com
    Signed-off-by: Ingo Molnar

    Dave Hansen
     

06 Nov, 2015

1 commit

17 Aug, 2015

1 commit

  • 8025e5ddf   [media] mm: Provide new get_vaddr_frames() helper ... Browse Code »

    Provide new function get_vaddr_frames(). This function maps virtual
    addresses from given start and fills given array with page frame numbers of
    the corresponding pages. If given start belongs to a normal vma, the function
    grabs reference to each of the pages to pin them in memory. If start
    belongs to VM_IO | VM_PFNMAP vma, we don't touch page structures. Caller
    must make sure pfns aren't reused for anything else while he is using
    them.

    This function is created for various drivers to simplify handling of
    their buffers.

    Signed-off-by: Jan Kara
    Acked-by: Mel Gorman
    Acked-by: Vlastimil Babka
    Acked-by: Andrew Morton
    Signed-off-by: Hans Verkuil
    Signed-off-by: Mauro Carvalho Chehab

    Jan Kara