Eric Lee / smarc-fsl-linux-kernel

21 Sep, 2016

3 commits

10 Sep, 2016

1 commit

24 May, 2016

1 commit

10 Nov, 2015

1 commit

  • 3510ca19a   Merge tag 'xtensa-20151108' of git://github.com/czankel/xtensa-linux ... Browse Code »

    Pull xtensa updates from Chris Zankel:

    - fix remaining issues with noMMU cores
    - fix build for cores w/o cache or zero overhead loop options
    - fix boot of secondary cores in SMP configuration
    - add support for DMA to high memory pages
    - add dma_to_phys and phys_to_dma functions.

    * tag 'xtensa-20151108' of git://github.com/czankel/xtensa-linux:
    xtensa: implement dma_to_phys and phys_to_dma
    xtensa: support DMA to high memory
    Revert "xtensa: cache inquiry and unaligned cache handling functions"
    xtensa: drop unused sections and remapped reset handlers
    xtensa: fix secondary core boot in SMP
    xtensa: add FORCE_MAX_ZONEORDER to Kconfig
    xtensa: nommu: provide defconfig for de212 on kc705
    xtensa: nommu: xtfpga: add kc705 DTS
    xtensa: add de212 core variant
    xtensa: nommu: select HAVE_FUTEX_CMPXCHG
    xtensa: nommu: fix default memory start address
    xtensa: nommu: provide correct KIO addresses
    xtensa: nommu: fix USER_RING definition
    xtensa: xtfpga: fix integer overflow in TASK_SIZE
    xtensa: fix build for configs without cache options
    xtensa: fixes for configs without loop option

    Linus Torvalds
     

07 Nov, 2015

1 commit

  • 1d798ca3f   mm: make compound_head() robust ... Browse Code »

    Hugh has pointed that compound_head() call can be unsafe in some
    context. There's one example:

    CPU0 CPU1

    isolate_migratepages_block()
    page_count()
    compound_head()
    !!PageTail() == true
    put_page()
    tail->first_page = NULL
    head = tail->first_page
    alloc_pages(__GFP_COMP)
    prep_compound_page()
    tail->first_page = head
    __SetPageTail(p);
    !!PageTail() == true

    The race is pure theoretical. I don't it's possible to trigger it in
    practice. But who knows.

    We can fix the race by changing how encode PageTail() and compound_head()
    within struct page to be able to update them in one shot.

    The patch introduces page->compound_head into third double word block in
    front of compound_dtor and compound_order. Bit 0 encodes PageTail() and
    the rest bits are pointer to head page if bit zero is set.

    The patch moves page->pmd_huge_pte out of word, just in case if an
    architecture defines pgtable_t into something what can have the bit 0
    set.

    hugetlb_cgroup uses page->lru.next in the second tail page to store
    pointer struct hugetlb_cgroup. The patch switch it to use page->private
    in the second tail page instead. The space is free since ->first_page is
    removed from the union.

    The patch also opens possibility to remove HUGETLB_CGROUP_MIN_ORDER
    limitation, since there's now space in first tail page to store struct
    hugetlb_cgroup pointer. But that's out of scope of the patch.

    That means page->compound_head shares storage space with:

    - page->lru.next;
    - page->next;
    - page->rcu_head.next;

    That's too long list to be absolutely sure, but looks like nobody uses
    bit 0 of the word.

    page->rcu_head.next guaranteed[1] to have bit 0 clean as long as we use
    call_rcu(), call_rcu_bh(), call_rcu_sched(), or call_srcu(). But future
    call_rcu_lazy() is not allowed as it makes use of the bit and we can
    get false positive PageTail().

    [1] http://lkml.kernel.org/g/20150827163634.GD4029@linux.vnet.ibm.com

    Signed-off-by: Kirill A. Shutemov
    Acked-by: Michal Hocko
    Reviewed-by: Andrea Arcangeli
    Cc: Hugh Dickins
    Cc: David Rientjes
    Cc: Vlastimil Babka
    Acked-by: Paul E. McKenney
    Cc: Aneesh Kumar K.V
    Cc: Andi Kleen
    Cc: Christoph Lameter
    Cc: Joonsoo Kim
    Cc: Sergey Senozhatsky
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Kirill A. Shutemov
     

02 Nov, 2015

1 commit

20 Jul, 2015

1 commit

  • 1b0b7c176   rtmutex: Delete scriptable tester ... Browse Code »

    No one uses this anymore, and this is not the first time the
    idea of replacing it with a (now possible) userspace side.
    Lock stealing logic was removed long ago in when the lock
    was granted to the highest prio.

    Signed-off-by: Davidlohr Bueso
    Cc: Darren Hart
    Cc: Steven Rostedt
    Cc: Mike Galbraith
    Cc: Paul E. McKenney
    Cc: Sebastian Andrzej Siewior
    Cc: Davidlohr Bueso
    Cc: Peter Zijlstra
    Link: http://lkml.kernel.org/r/1435782588-4177-2-git-send-email-dave@stgolabs.net
    Signed-off-by: Thomas Gleixner

    Davidlohr Bueso
     

07 Feb, 2015

1 commit

16 Dec, 2014

1 commit

  • 1f2fdbd00   xtensa: disable link optimization ... Browse Code »

    The default linker behavior is to optimize identical literal values
    and remove unnecessary overhead. However, because of a bug in the
    linker, this currently results in an error ('call target out of range').

    Disable link-time optimizations per default until there is a fix
    for the linker and add the option to iss_defconfig.

    Signed-off-by: Chris Zankel

    Chris Zankel
     

21 Oct, 2014

3 commits

14 Aug, 2014

2 commits

13 Apr, 2014

1 commit

  • 5166701b3   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull vfs updates from Al Viro:
    "The first vfs pile, with deep apologies for being very late in this
    window.

    Assorted cleanups and fixes, plus a large preparatory part of iov_iter
    work. There's a lot more of that, but it'll probably go into the next
    merge window - it *does* shape up nicely, removes a lot of
    boilerplate, gets rid of locking inconsistencie between aio_write and
    splice_write and I hope to get Kent's direct-io rewrite merged into
    the same queue, but some of the stuff after this point is having
    (mostly trivial) conflicts with the things already merged into
    mainline and with some I want more testing.

    This one passes LTP and xfstests without regressions, in addition to
    usual beating. BTW, readahead02 in ltp syscalls testsuite has started
    giving failures since "mm/readahead.c: fix readahead failure for
    memoryless NUMA nodes and limit readahead pages" - might be a false
    positive, might be a real regression..."

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
    missing bits of "splice: fix racy pipe->buffers uses"
    cifs: fix the race in cifs_writev()
    ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
    kill generic_file_buffered_write()
    ocfs2_file_aio_write(): switch to generic_perform_write()
    ceph_aio_write(): switch to generic_perform_write()
    xfs_file_buffered_aio_write(): switch to generic_perform_write()
    export generic_perform_write(), start getting rid of generic_file_buffer_write()
    generic_file_direct_write(): get rid of ppos argument
    btrfs_file_aio_write(): get rid of ppos
    kill the 5th argument of generic_file_buffered_write()
    kill the 4th argument of __generic_file_aio_write()
    lustre: don't open-code kernel_recvmsg()
    ocfs2: don't open-code kernel_recvmsg()
    drbd: don't open-code kernel_recvmsg()
    constify blk_rq_map_user_iov() and friends
    lustre: switch to kernel_sendmsg()
    ocfs2: don't open-code kernel_sendmsg()
    take iov_iter stuff to mm/iov_iter.c
    process_vm_access: tidy up a bit
    ...

    Linus Torvalds
     

08 Apr, 2014

1 commit

  • ce816fa88   Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP ... Browse Code »

    If the renamed symbol is defined lib/iomap.c implements ioport_map and
    ioport_unmap and currently (nearly) all platforms define the port
    accessor functions outb/inb and friend unconditionally. So
    HAS_IOPORT_MAP is the better name for this.

    Consequently NO_IOPORT is renamed to NO_IOPORT_MAP.

    The motivation for this change is to reintroduce a symbol HAS_IOPORT
    that signals if outb/int et al are available. I will address that at
    least one merge window later though to keep surprises to a minimum and
    catch new introductions of (HAS|NO)_IOPORT.

    The changes in this commit were done using:

    $ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/'

    Signed-off-by: Uwe Kleine-König
    Acked-by: Arnd Bergmann
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Uwe Kleine-König
     

02 Apr, 2014

1 commit

13 Sep, 2013

1 commit

20 Mar, 2013

1 commit

04 Oct, 2012

1 commit

  • 9ad79b585   xtensa: drop CONFIG_EMBEDDED_RAMDISK ... Browse Code »

    Remove Kconfig entries, boot subdirectory, dependencies from other
    boot-* Makefiles, and sections from ld scripts.

    Remove stale redboot code that used to pass initrd addresses in a3 and
    a4 to _start.

    Signed-off-by: Max Filippov
    Signed-off-by: Chris Zankel

    Max Filippov
     

16 May, 2012

1 commit

  • ee446fd5e   tokenring: delete all remaining driver support ... Browse Code »

    This represents the mass deletion of the of the tokenring support.

    It gets rid of:
    - the net/tr.c which the drivers depended on
    - the drivers/net component
    - the Kbuild infrastructure around it
    - any tokenring related CONFIG_ settings in any defconfigs
    - the tokenring headers in the include/linux dir
    - the firmware associated with the tokenring drivers.
    - any associated token ring documentation.

    Signed-off-by: Paul Gortmaker

    Paul Gortmaker
     

23 Mar, 2012

1 commit

  • e335e3eb8   locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage ... Browse Code »

    Get rid of INLINE_SPIN_UNLOCK entirely replacing it with
    UNINLINE_SPIN_UNLOCK instead of the reverse meaning.

    Whoever wants to change the default spinlock inlining
    behavior and uninline the spinlocks for some weird reason,
    such as spinlock debugging, paravirt etc. can now all just
    select UNINLINE_SPIN_UNLOCK

    Original discussion at: https://lkml.org/lkml/2012/3/21/357

    Suggested-by: Linus Torvalds
    Signed-off-by: Raghavendra K T
    Cc: Linus Torvalds
    Cc: Ralf Baechle
    Cc: Chris Metcalf
    Cc: Chris Zankel
    Cc: linux-mips@linux-mips.org
    Link: http://lkml.kernel.org/r/20120322095502.30866.75756.sendpatchset@codeblue
    [ tidied up the changelog a bit ]
    Signed-off-by: Ingo Molnar

    Raghavendra K T
     

05 Oct, 2011

1 commit

  • dcb69290a   time: Cleanup old CONFIG_GENERIC_TIME references that snuck in ... Browse Code »

    Awhile back I removed all the CONFIG_GENERIC_TIME referecnes as
    the last of the non-GENERIC_TIME arches were converted.

    However, due to the functionality being important and around for
    awhile, there apparently were some out of tree hardware enablement
    patches that used it and have since been merged.

    This patch removes the remaining instances of GENERIC_TIME.

    Singed-off-by: John Stultz

    John Stultz
     

11 Apr, 2011

1 commit

15 Feb, 2011

1 commit

21 Jan, 2011

1 commit

  • 6a108a14f   kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT ... Browse Code »

    The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
    is used to configure any non-standard kernel with a much larger scope than
    only small devices.

    This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
    references to the option throughout the kernel. A new CONFIG_EMBEDDED
    option is added that automatically selects CONFIG_EXPERT when enabled and
    can be used in the future to isolate options that should only be
    considered for embedded systems (RISC architectures, SLOB, etc).

    Calling the option "EXPERT" more accurately represents its intention: only
    expert users who understand the impact of the configuration changes they
    are making should enable it.

    Reviewed-by: Ingo Molnar
    Acked-by: David Woodhouse
    Signed-off-by: David Rientjes
    Cc: Greg KH
    Cc: "David S. Miller"
    Cc: Jens Axboe
    Cc: Arnd Bergmann
    Cc: Robin Holt
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Rientjes
     

19 Jan, 2011

1 commit

03 Aug, 2010

1 commit

22 Jun, 2009

2 commits

12 May, 2009

1 commit

03 Apr, 2009

1 commit

11 Dec, 2006

1 commit

  • 173d66813   [PATCH] xtensa: remove extra header files ... Browse Code »

    The Xtensa port contained many header files that were never needed. This
    rather lengthy patch removes all those files. Unfortunately, there were
    many dependencies that needed to be updated, so this patch touches quite a
    few source files.

    Signed-off-by: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Chris Zankel
     

24 Jun, 2005

2 commits