Eric Lee / smarc-fsl-linux-kernel

29 May, 2011

2 commits

  • 571503e10   Merge branch 'setns' ... Browse Code »

    * setns:
    ns: Wire up the setns system call

    Done as a merge to make it easier to fix up conflicts in arm due to
    addition of sendmmsg system call

    Linus Torvalds
     
  • 7b21fddd0   ns: Wire up the setns system call ... Browse Code »

    32bit and 64bit on x86 are tested and working. The rest I have looked
    at closely and I can't find any problems.

    setns is an easy system call to wire up. It just takes two ints so I
    don't expect any weird architecture porting problems.

    While doing this I have noticed that we have some architectures that are
    very slow to get new system calls. cris seems to be the slowest where
    the last system calls wired up were preadv and pwritev. avr32 is weird
    in that recvmmsg was wired up but never declared in unistd.h. frv is
    behind with perf_event_open being the last syscall wired up. On h8300
    the last system call wired up was epoll_wait. On m32r the last system
    call wired up was fallocate. mn10300 has recvmmsg as the last system
    call wired up. The rest seem to at least have syncfs wired up which was
    new in the 2.6.39.

    v2: Most of the architecture support added by Daniel Lezcano
    v3: ported to v2.6.36-rc4 by: Eric W. Biederman
    v4: Moved wiring up of the system call to another patch
    v5: ported to v2.6.39-rc6
    v6: rebased onto parisc-next and net-next to avoid syscall conflicts.
    v7: ported to Linus's latest post 2.6.39 tree.

    >  arch/blackfin/include/asm/unistd.h     |    3 ++-
    >  arch/blackfin/mach-common/entry.S      |    1 +
    Acked-by: Mike Frysinger

    Oh - ia64 wiring looks good.
    Acked-by: Tony Luck

    Signed-off-by: Eric W. Biederman
    Signed-off-by: Linus Torvalds

    Eric W. Biederman
     

28 May, 2011

1 commit

27 May, 2011

1 commit

  • 63e424c84   arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT} ... Browse Code »

    By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT,
    CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used
    to test for existence of find bitops anymore.

    Signed-off-by: Akinobu Mita
    Acked-by: Greg Ungerer
    Cc: Arnd Bergmann
    Cc: Russell King
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

25 May, 2011

3 commits

31 Mar, 2011

1 commit

30 Mar, 2011

1 commit

29 Mar, 2011

11 commits

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
     

24 Mar, 2011

4 commits

  • 61f2e7b0f   bitops: remove minix bitops from asm/bitops.h ... Browse Code »

    minix bit operations are only used by minix filesystem and useless by
    other modules. Because byte order of inode and block bitmaps is different
    on each architecture like below:

    m68k:
    big-endian 16bit indexed bitmaps

    h8300, microblaze, s390, sparc, m68knommu:
    big-endian 32 or 64bit indexed bitmaps

    m32r, mips, sh, xtensa:
    big-endian 32 or 64bit indexed bitmaps for big-endian mode
    little-endian bitmaps for little-endian mode

    Others:
    little-endian bitmaps

    In order to move minix bit operations from asm/bitops.h to architecture
    independent code in minix filesystem, this provides two config options.

    CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
    CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use
    native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu,
    m32r, mips, sh, xtensa). The architectures which always use little-endian
    bitmaps do not select these options.

    Finally, we can remove minix bit operations from asm/bitops.h for all
    architectures.

    Signed-off-by: Akinobu Mita
    Acked-by: Arnd Bergmann
    Acked-by: Greg Ungerer
    Cc: Geert Uytterhoeven
    Cc: Roman Zippel
    Cc: Andreas Schwab
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Yoshinori Sato
    Cc: Michal Simek
    Cc: "David S. Miller"
    Cc: Hirokazu Takata
    Acked-by: Ralf Baechle
    Acked-by: Paul Mundt
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • f312eff81   bitops: remove ext2 non-atomic bitops from asm/bitops.h ... Browse Code »

    As the result of conversions, there are no users of ext2 non-atomic bit
    operations except for ext2 filesystem itself. Now we can put them into
    architecture independent code in ext2 filesystem, and remove from
    asm/bitops.h for all architectures.

    Signed-off-by: Akinobu Mita
    Cc: Jan Kara
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 861b5ae7c   bitops: introduce little-endian bitops for most architectures ... Browse Code »

    Introduce little-endian bit operations to the big-endian architectures
    which do not have native little-endian bit operations and the
    little-endian architectures. (alpha, avr32, blackfin, cris, frv, h8300,
    ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa)

    These architectures can just include generic implementation
    (asm-generic/bitops/le.h).

    Signed-off-by: Akinobu Mita
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Matthew Wilcox
    Cc: Grant Grundler
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Cc: Hirokazu Takata
    Cc: "David S. Miller"
    Cc: Chris Zankel
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Acked-by: Hans-Christian Egtvedt
    Acked-by: "H. Peter Anvin"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 0664996b7   bitops: introduce CONFIG_GENERIC_FIND_BIT_LE ... Browse Code »

    This introduces CONFIG_GENERIC_FIND_BIT_LE to tell whether to use generic
    implementation of find_*_bit_le() in lib/find_next_bit.c or not.

    For now we select CONFIG_GENERIC_FIND_BIT_LE for all architectures which
    enable CONFIG_GENERIC_FIND_NEXT_BIT.

    But m68knommu wants to define own faster find_next_zero_bit_le() and
    continues using generic find_next_{,zero_}bit().
    (CONFIG_GENERIC_FIND_NEXT_BIT and !CONFIG_GENERIC_FIND_BIT_LE)

    Signed-off-by: Akinobu Mita
    Cc: Greg Ungerer
    Cc: Arnd Bergmann
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

23 Mar, 2011

3 commits

  • 3e50594e8   add the common dma_addr_t typedef to include/linux/types.h ... Browse Code »

    All architectures can use the common dma_addr_t typedef now. We can
    remove the arch specific dma_addr_t.

    Signed-off-by: FUJITA Tomonori
    Acked-by: Arnd Bergmann
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: Ivan Kokshaysky
    Cc: Richard Henderson
    Cc: Matt Turner
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Chris Metcalf
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    FUJITA Tomonori
     
  • b6a84016b   mm: NUMA aware alloc_thread_info_node() ... Browse Code »

    Add a node parameter to alloc_thread_info(), and change its name to
    alloc_thread_info_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
     
  • 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
     

16 Mar, 2011

2 commits

  • 79d8a8f73   Merge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu ... Browse Code »

    * 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
    percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support
    percpu: Generic support for this_cpu_cmpxchg_double()
    alpha: use L1_CACHE_BYTES for cacheline size in the linker script
    percpu: align percpu readmostly subsection to cacheline

    Fix up trivial conflict in arch/x86/kernel/vmlinux.lds.S due to the
    percpu alignment having changed ("x86: Reduce back the alignment of the
    per-CPU data section")

    Linus Torvalds
     
  • 420c1c572   Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kerne… ... Browse Code »

    …l/git/tip/linux-2.6-tip

    * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (62 commits)
    posix-clocks: Check write permissions in posix syscalls
    hrtimer: Remove empty hrtimer_init_hres_timer()
    hrtimer: Update hrtimer->state documentation
    hrtimer: Update base[CLOCK_BOOTTIME].offset correctly
    timers: Export CLOCK_BOOTTIME via the posix timers interface
    timers: Add CLOCK_BOOTTIME hrtimer base
    time: Extend get_xtime_and_monotonic_offset() to also return sleep
    time: Introduce get_monotonic_boottime and ktime_get_boottime
    hrtimers: extend hrtimer base code to handle more then 2 clockids
    ntp: Remove redundant and incorrect parameter check
    mn10300: Switch do_timer() to xtimer_update()
    posix clocks: Introduce dynamic clocks
    posix-timers: Cleanup namespace
    posix-timers: Add support for fd based clocks
    x86: Add clock_adjtime for x86
    posix-timers: Introduce a syscall for clock tuning.
    time: Splitout compat timex accessors
    ntp: Add ADJ_SETOFFSET mode bit
    time: Introduce timekeeping_inject_offset
    posix-timer: Update comment
    ...

    Fix up new system-call-related conflicts in
    arch/x86/ia32/ia32entry.S
    arch/x86/include/asm/unistd_32.h
    arch/x86/include/asm/unistd_64.h
    arch/x86/kernel/syscall_table_32.S
    (name_to_handle_at()/open_by_handle_at() vs clock_adjtime()), and some
    due to movement of get_jiffies_64() in:
    kernel/time.c

    Linus Torvalds
     

11 Mar, 2011

2 commits

  • 8d7718aa0   futex: Sanitize futex ops argument types ... Browse Code »
    90

    Change futex_atomic_op_inuser and futex_atomic_cmpxchg_inatomic
    prototypes to use u32 types for the futex as this is the data type the
    futex core code uses all over the place.

    Signed-off-by: Michel Lespinasse
    Cc: Darren Hart
    Cc: Peter Zijlstra
    Cc: Matt Turner
    Cc: Russell King
    Cc: David Howells
    Cc: Tony Luck
    Cc: Michal Simek
    Cc: Ralf Baechle
    Cc: "James E.J. Bottomley"
    Cc: Benjamin Herrenschmidt
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Cc: "David S. Miller"
    Cc: Chris Metcalf
    Cc: Linus Torvalds
    LKML-Reference:
    Signed-off-by: Thomas Gleixner

    Michel Lespinasse
     
  • 37a9d912b   futex: Sanitize cmpxchg_futex_value_locked API ... Browse Code »
    45

    The cmpxchg_futex_value_locked API was funny in that it returned either
    the original, user-exposed futex value OR an error code such as -EFAULT.
    This was confusing at best, and could be a source of livelocks in places
    that retry the cmpxchg_futex_value_locked after trying to fix the issue
    by running fault_in_user_writeable().

    This change makes the cmpxchg_futex_value_locked API more similar to the
    get_futex_value_locked one, returning an error code and updating the
    original value through a reference argument.

    Signed-off-by: Michel Lespinasse
    Acked-by: Chris Metcalf [tile]
    Acked-by: Tony Luck [ia64]
    Acked-by: Thomas Gleixner
    Tested-by: Michal Simek [microblaze]
    Acked-by: David Howells [frv]
    Cc: Darren Hart
    Cc: Peter Zijlstra
    Cc: Matt Turner
    Cc: Russell King
    Cc: Ralf Baechle
    Cc: "James E.J. Bottomley"
    Cc: Benjamin Herrenschmidt
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Cc: "David S. Miller"
    Cc: Linus Torvalds
    LKML-Reference:
    Signed-off-by: Thomas Gleixner

    Michel Lespinasse
     

31 Jan, 2011

1 commit

  • 57464bd87   frv: Switch do_timer() to xtime_update() ... Browse Code »

    __set_LEDS() does not need to be protected by xtime_lock.
    its used unprotected in other places.

    [ tglx: Removed stale comment ]

    Signed-off-by: Torben Hohn
    Cc: hch@infradead.org
    Cc: Peter Zijlstra
    Cc: johnstul@us.ibm.com
    Cc: David Howells
    Cc: yong.zhang0@gmail.com
    LKML-Reference:
    Signed-off-by: Thomas Gleixner

    Torben Hohn
     

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
     

21 Jan, 2011

3 commits

  • f39b02d6f   frv: Use generic irq Kconfig ... Browse Code »

    No functional change.

    Signed-off-by: Thomas Gleixner
    Acked-by: David Howells

    Thomas Gleixner
     
  • 1c77ff22f   genirq: Remove __do_IRQ ... Browse Code »

    All architectures are finally converted. Remove the cruft.

    Signed-off-by: Thomas Gleixner
    Cc: Richard Henderson
    Cc: Mike Frysinger
    Cc: David Howells
    Cc: Tony Luck
    Cc: Greg Ungerer
    Cc: Michal Simek
    Acked-by: David Howells
    Cc: Kyle McMartin
    Acked-by: Benjamin Herrenschmidt
    Cc: Chen Liqin
    Cc: "David S. Miller"
    Cc: Chris Metcalf
    Cc: Jeff Dike

    Thomas Gleixner
     
  • 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
     

18 Nov, 2010

1 commit

29 Oct, 2010

1 commit

  • 51399a391   Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 ... Browse Code »

    * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits)
    kbuild: convert `arch/tile' to the kconfig mainmenu upgrade
    README: cite nconfig
    Revert "kconfig: Temporarily disable dependency warnings"
    kconfig: Use PATH_MAX instead of 128 for path buffer sizes.
    kconfig: Fix realloc usage()
    kconfig: Propagate const
    kconfig: Don't go out from read config loop when you read new symbol
    kconfig: fix menuconfig on debian lenny
    kbuild: migrate all arch to the kconfig mainmenu upgrade
    kconfig: expand file names
    kconfig: use the file's name of sourced file
    kconfig: constify file name
    kconfig: don't emit warning upon rootmenu's prompt redefinition
    kconfig: replace KERNELVERSION usage by the mainmenu's prompt
    kconfig: delay gconf window initialization
    kconfig: expand by default the rootmenu's prompt
    kconfig: add a symbol string expansion helper
    kconfig: regen parser
    kconfig: implement the `mainmenu' directive
    kconfig: allow PACKAGE to be defined on the compiler's command-line
    ...

    Fix up trivial conflict in arch/mn10300/Kconfig

    Linus Torvalds
     

28 Oct, 2010

1 commit

  • 81d3285c9   ptrace: cleanup arch_ptrace() on frv ... Browse Code »

    Use new 'regno', 'datap' variables in order to remove duplicated
    expressions and unnecessary castings. Alse remove checking @addr
    less than 0 because addr is now unsigned.

    Signed-off-by: Namhyung Kim
    Cc: David Howells
    Cc: "Daniel K."
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Namhyung Kim