Eric Lee / smarc-fsl-linux-kernel

22 Nov, 2011

1 commit

02 Nov, 2011

20 commits

15 Sep, 2011

1 commit

  • f2833aef6   um: clean arch_ptrace() up a bit ... Browse Code »

    1) take subarch-specific stuff to subarch_ptrace()
    2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine...

    Signed-off-by: Al Viro
    Signed-off-by: Richard Weinberger
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Al Viro
     

27 Jul, 2011

1 commit

26 Jul, 2011

1 commit

28 Jun, 2011

1 commit

25 May, 2011

4 commits

  • 818b667ba   Remove unused PROC_CHANGE_PENALTY constant ... Browse Code »

    This constant hasn't been used since before the git era (2.6.12) and thus
    can be dropped.

    Signed-off-by: Stephen Boyd
    Cc: Russell King
    Cc: Richard Weinberger
    Cc: Hirokazu Takata
    Cc: Kyle McMartin
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Matt Turner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Stephen Boyd
     
  • 607647ab0   um: include linux/prefetch.h ... Browse Code »

    Fix build failures on UML.

    Signed-off-by: Richard Weinberger
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Richard Weinberger
     
  • ff075d605   um: mmu_gather rework ... Browse Code »

    Fix up the um mmu_gather code to conform to the new API.

    Signed-off-by: Peter Zijlstra
    Cc: Jeff Dike
    Cc: Richard Weinberger
    Cc: Benjamin Herrenschmidt
    Cc: David Miller
    Cc: Martin Schwidefsky
    Cc: Russell King
    Cc: Paul Mundt
    Cc: Tony Luck
    Cc: KAMEZAWA Hiroyuki
    Cc: Hugh Dickins
    Cc: Mel Gorman
    Cc: KOSAKI Motohiro
    Cc: Nick Piggin
    Cc: Namhyung Kim
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Zijlstra
     
  • 5129df03d   Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu ... Browse Code »

    * 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
    percpu: Unify input section names
    percpu: Avoid extra NOP in percpu_cmpxchg16b_double
    percpu: Cast away printk format warning
    percpu: Always align percpu output section to PAGE_SIZE

    Fix up fairly trivial conflict in arch/x86/include/asm/percpu.h as per Tejun

    Linus Torvalds
     

29 Apr, 2011

1 commit

15 Apr, 2011

1 commit

  • 6d56dad3a   um: fix call tracer and bug handler ... Browse Code »

    Commit 1de1502c ("x86, um: now we can get rid of trivial uml headers")
    removed accidentally bug.h which broke UML's call tracer and bug
    handler.

    Without asm-generic/bug.h UML uses BUG() from arch/x86/ which makes use
    of ud2. UML cannot use ud2, it raises SIGILL in user mode. As UML has
    a different stack for handling signals the call trace will be cut off.

    Signed-off-by: Richard Weinberger
    Reported-by: Sergei Trofimovich
    Tested-by: Sergei Trofimovich
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Richard Weinberger
     

25 Mar, 2011

1 commit

  • 0415b00d1   percpu: Always align percpu output section to PAGE_SIZE ... Browse Code »

    Percpu allocator honors alignment request upto PAGE_SIZE and both the
    percpu addresses in the percpu address space and the translated kernel
    addresses should be aligned accordingly. The calculation of the
    former depends on the alignment of percpu output section in the kernel
    image.

    The linker script macros PERCPU_VADDR() and PERCPU() are used to
    define this output section and the latter takes @align parameter.
    Several architectures are using @align smaller than PAGE_SIZE breaking
    percpu memory alignment.

    This patch removes @align parameter from PERCPU(), renames it to
    PERCPU_SECTION() and makes it always align to PAGE_SIZE. While at it,
    add PCPU_SETUP_BUG_ON() checks such that alignment problems are
    reliably detected and remove percpu alignment comment recently added
    in workqueue.c as the condition would trigger BUG way before reaching
    there.

    For um, this patch raises the alignment of percpu area. As the area
    is in .init, there shouldn't be any noticeable difference.

    This problem was discovered by David Howells while debugging boot
    failure on mn10300.

    Signed-off-by: Tejun Heo
    Acked-by: Mike Frysinger
    Cc: uclinux-dist-devel@blackfin.uclinux.org
    Cc: David Howells
    Cc: Jeff Dike
    Cc: user-mode-linux-devel@lists.sourceforge.net

    Tejun Heo
     

23 Mar, 2011

1 commit

  • 504f52b54   mm: NUMA aware alloc_task_struct_node() ... Browse Code »

    All kthreads being created from a single helper task, they all use memory
    from a single node for their kernel stack and task struct.

    This patch suite creates kthread_create_on_cpu(), adding a 'cpu' parameter
    to parameters already used by kthread_create().

    This parameter serves in allocating memory for the new kthread on its
    memory node if available.

    Users of this new function are : ksoftirqd, kworker, migration, pktgend...

    This patch:

    Add a node parameter to alloc_task_struct(), and change its name to
    alloc_task_struct_node()

    This change is needed to allow NUMA aware kthread_create_on_cpu()

    Signed-off-by: Eric Dumazet
    Acked-by: David S. Miller
    Reviewed-by: Andi Kleen
    Acked-by: Rusty Russell
    Cc: Tejun Heo
    Cc: Tony Luck
    Cc: Fenghua Yu
    Cc: David Howells
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Dumazet
     

25 Jan, 2011

1 commit

  • 19df0c2fe   percpu: align percpu readmostly subsection to cacheline ... Browse Code »

    Currently percpu readmostly subsection may share cachelines with other
    percpu subsections which may result in unnecessary cacheline bounce
    and performance degradation.

    This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
    linker macros, makes each arch linker scripts specify its cacheline
    size and use it to align percpu subsections.

    This is based on Shaohua's x86 only patch.

    Signed-off-by: Tejun Heo
    Cc: Shaohua Li

    Tejun Heo
     

12 Nov, 2010

1 commit

  • 8818b6719   um: fix ptrace build error ... Browse Code »

    Both commits 0a3d763f1a68 ("ptrace: cleanup arch_ptrace() on um") and
    9b05a69e0534 ("ptrace: change signature of arch_ptrace()") broke the um
    build. This patch fixes the issues.

    0a3d763f1a68 introduced the undeclared variable "datavp". The patch seems
    completely untested. :-(

    9b05a69e0534 changed arch_ptrace()'s signature but did not update
    um/include/asm/ptrace-generic.h.

    Signed-off-by: Richard Weinberger
    Cc: Namhyung Kim
    Cc: Jeff Dike
    Tested-by: Will Newton
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Richard Weinberger
     

27 Oct, 2010

3 commits

  • d911202e3   uml: define CONFIG_NO_DMA ... Browse Code »

    I think that it's better to detect DMA misuse at build time rather than
    calling BUG_ON. Architectures that can't do DMA need to define
    CONFIG_NO_DMA.

    Thanks to Sam Ravnborg for explaining how CONFIG_NO_DMA and CONFIG_HAS_DMA
    work:

    http://marc.info/?l=linux-kernel&m=128359913825550&w=2

    HAS_DMA is defined like this:

    config HAS_DMA
    boolean
    depends on !NO_DMA
    default y

    So to set HAS_DMA to true an arch should do:
    1) Do not define NO_DMA
    2) Define NO_DMA abd set it to 'n'

    Must archs - including um - used principle 1).

    In the um case we want to say that we do NOT have any DMA.
    This can be done in two ways.
    a) define NO_DMA and set it to 'y'
    b) redefine HAS_DMA and set it to 'n'.

    The patch you provided used principle b) where other archs use principle a).
    So I suggest you should use principle a) for um too.

    Signed-off-by: FUJITA Tomonori
    Cc: Miklos Szeredi
    Cc: Jeff Dike
    Cc: Sam Ravnborg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    FUJITA Tomonori
     
  • ece0e2b64   mm: remove pte_*map_nested() ... Browse Code »

    Since we no longer need to provide KM_type, the whole pte_*map_nested()
    API is now redundant, remove it.

    Signed-off-by: Peter Zijlstra
    Acked-by: Chris Metcalf
    Cc: David Howells
    Cc: Hugh Dickins
    Cc: Rik van Riel
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: Steven Rostedt
    Cc: Russell King
    Cc: Ralf Baechle
    Cc: David Miller
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Zijlstra
     
  • dbec92137   um: fix IRQ flag handling naming ... Browse Code »

    Commit df9ee292 ("Fix IRQ flag handling naming") changed the IRQ flag
    handling naming scheme and broke UML:

    In file included from arch/um/include/asm/fixmap.h:5,
    from arch/um/include/shared/um_uaccess.h:10,
    from arch/um/include/asm/uaccess.h:41,
    from arch/um/include/asm/thread_info.h:13,
    from include/linux/thread_info.h:56,
    from include/linux/preempt.h:9,
    from include/linux/spinlock.h:50,
    from include/linux/seqlock.h:29,
    from include/linux/time.h:8,
    from include/linux/stat.h:60,
    from include/linux/module.h:10,
    from init/main.c:13:
    arch/um/include/asm/system.h:11:1: warning: "local_save_flags" redefined

    This patch brings the new scheme to UML and makes it work again.

    Signed-off-by: Richard Weinberger
    Acked-by: David Howells
    Cc: Jeff Dike
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Richard Weinberger
     

21 Aug, 2010

1 commit

  • f3c072ad7   uml: fix compile error in dma_get_cache_alignment() ... Browse Code »

    Fix uml compile error:

    include/linux/dma-mapping.h:145: error: redefinition of 'dma_get_cache_alignment'
    arch/um/include/asm/dma-mapping.h:99: note: previous definition of 'dma_get_cache_alignment' was here

    Introduced by commit 4565f0170dfc ("dma-mapping: unify
    dma_get_cache_alignment implementations")

    Signed-off-by: Miklos Szeredi
    Cc: Jeff Dike
    Cc: FUJITA Tomonori
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Miklos Szeredi
     

11 Aug, 2010

1 commit

  • 3b9c6c11f   dma-mapping: remove dma_is_consistent API ... Browse Code »

    Architectures implement dma_is_consistent() in different ways (some
    misinterpret the definition of API in DMA-API.txt). So it hasn't been so
    useful for drivers. We have only one user of the API in tree. Unlikely
    out-of-tree drivers use the API.

    Even if we fix dma_is_consistent() in some architectures, it doesn't look
    useful at all. It was invented long ago for some old systems that can't
    allocate coherent memory at all. It's better to export only APIs that are
    definitely necessary for drivers.

    Let's remove this API.

    Signed-off-by: FUJITA Tomonori
    Cc: James Bottomley
    Reviewed-by: Konrad Rzeszutek Wilk
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    FUJITA Tomonori