Eric Lee / smarc-fsl-linux-kernel

12 Jan, 2012

1 commit

  • 9f13a1fd4   cpu: Register a generic CPU device on architectures that currently do not ... Browse Code »
    43

    frv, h8300, m68k, microblaze, openrisc, score, um and xtensa currently
    do not register a CPU device. Add the config option GENERIC_CPU_DEVICES
    which causes a generic CPU device to be registered for each present CPU,
    and make all these architectures select it.

    Richard Weinberger covered UML and suggested using
    per_cpu.

    Signed-off-by: Ben Hutchings
    Signed-off-by: Linus Torvalds

    Ben Hutchings
     

09 Jan, 2012

1 commit

  • eb59c505f   Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm ... Browse Code »

    * 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)
    PM / Hibernate: Implement compat_ioctl for /dev/snapshot
    PM / Freezer: fix return value of freezable_schedule_timeout_killable()
    PM / shmobile: Allow the A4R domain to be turned off at run time
    PM / input / touchscreen: Make st1232 use device PM QoS constraints
    PM / QoS: Introduce dev_pm_qos_add_ancestor_request()
    PM / shmobile: Remove the stay_on flag from SH7372's PM domains
    PM / shmobile: Don't include SH7372's INTCS in syscore suspend/resume
    PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode
    PM: Drop generic_subsys_pm_ops
    PM / Sleep: Remove forward-only callbacks from AMBA bus type
    PM / Sleep: Remove forward-only callbacks from platform bus type
    PM: Run the driver callback directly if the subsystem one is not there
    PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers
    PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412.
    PM / Sleep: Merge internal functions in generic_ops.c
    PM / Sleep: Simplify generic system suspend callbacks
    PM / Hibernate: Remove deprecated hibernation snapshot ioctls
    PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled()
    ARM: S3C64XX: Implement basic power domain support
    PM / shmobile: Use common always on power domain governor
    ...

    Fix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused
    XBT_FORCE_SLEEP bit

    Linus Torvalds
     

07 Jan, 2012

1 commit

  • 376613e81   Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ... Browse Code »

    * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
    x86, tsc: Skip TSC synchronization checks for tsc=reliable
    clocksource: Convert tcb_clksrc to use clocksource_register_hz/khz
    clocksource: cris: Convert to clocksource_register_khz
    clocksource: xtensa: Convert to clocksource_register_hz/khz
    clocksource: um: Convert to clocksource_register_hz/khz
    clocksource: parisc: Convert to clocksource_register_hz/khz
    clocksource: m86k: Convert to clocksource_register_hz/khz
    time: x86: Replace LATCH with PIT_LATCH in i8253 clocksource driver
    time: x86: Remove CLOCK_TICK_RATE from acpi_pm clocksource driver
    time: x86: Remove CLOCK_TICK_RATE from mach_timer.h
    time: x86: Remove CLOCK_TICK_RATE from tsc code
    time: Fix spelling mistakes in new comments
    time: fix bogus comment in timekeeping_get_ns_raw

    Linus Torvalds
     

12 Dec, 2011

3 commits

  • 1268fbc74   nohz: Remove tick_nohz_idle_enter_norcu() / tick_nohz_idle_exit_norcu() ... Browse Code »

    Those two APIs were provided to optimize the calls of
    tick_nohz_idle_enter() and rcu_idle_enter() into a single
    irq disabled section. This way no interrupt happening in-between would
    needlessly process any RCU job.

    Now we are talking about an optimization for which benefits
    have yet to be measured. Let's start simple and completely decouple
    idle rcu and dyntick idle logics to simplify.

    Signed-off-by: Frederic Weisbecker
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Peter Zijlstra
    Reviewed-by: Josh Triplett
    Signed-off-by: Paul E. McKenney

    Frederic Weisbecker
     
  • 2bbb6817c   nohz: Allow rcu extended quiescent state handling seperately from tick stop ... Browse Code »

    It is assumed that rcu won't be used once we switch to tickless
    mode and until we restart the tick. However this is not always
    true, as in x86-64 where we dereference the idle notifiers after
    the tick is stopped.

    To prepare for fixing this, add two new APIs:
    tick_nohz_idle_enter_norcu() and tick_nohz_idle_exit_norcu().

    If no use of RCU is made in the idle loop between
    tick_nohz_enter_idle() and tick_nohz_exit_idle() calls, the arch
    must instead call the new *_norcu() version such that the arch doesn't
    need to call rcu_idle_enter() and rcu_idle_exit().

    Otherwise the arch must call tick_nohz_enter_idle() and
    tick_nohz_exit_idle() and also call explicitly:

    - rcu_idle_enter() after its last use of RCU before the CPU is put
    to sleep.
    - rcu_idle_exit() before the first use of RCU after the CPU is woken
    up.

    Signed-off-by: Frederic Weisbecker
    Cc: Mike Frysinger
    Cc: Guan Xuetao
    Cc: David Miller
    Cc: Chris Metcalf
    Cc: Hans-Christian Egtvedt
    Cc: Ralf Baechle
    Cc: Paul E. McKenney
    Cc: Ingo Molnar
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: H. Peter Anvin
    Cc: Russell King
    Cc: Paul Mackerras
    Cc: Heiko Carstens
    Cc: Paul Mundt
    Signed-off-by: Paul E. McKenney

    Frederic Weisbecker
     
  • 280f06774   nohz: Separate out irq exit and idle loop dyntick logic ... Browse Code »

    The tick_nohz_stop_sched_tick() function, which tries to delay
    the next timer tick as long as possible, can be called from two
    places:

    - From the idle loop to start the dytick idle mode
    - From interrupt exit if we have interrupted the dyntick
    idle mode, so that we reprogram the next tick event in
    case the irq changed some internal state that requires this
    action.

    There are only few minor differences between both that
    are handled by that function, driven by the ts->inidle
    cpu variable and the inidle parameter. The whole guarantees
    that we only update the dyntick mode on irq exit if we actually
    interrupted the dyntick idle mode, and that we enter in RCU extended
    quiescent state from idle loop entry only.

    Split this function into:

    - tick_nohz_idle_enter(), which sets ts->inidle to 1, enters
    dynticks idle mode unconditionally if it can, and enters into RCU
    extended quiescent state.

    - tick_nohz_irq_exit() which only updates the dynticks idle mode
    when ts->inidle is set (ie: if tick_nohz_idle_enter() has been called).

    To maintain symmetry, tick_nohz_restart_sched_tick() has been renamed
    into tick_nohz_idle_exit().

    This simplifies the code and micro-optimize the irq exit path (no need
    for local_irq_save there). This also prepares for the split between
    dynticks and rcu extended quiescent state logics. We'll need this split to
    further fix illegal uses of RCU in extended quiescent states in the idle
    loop.

    Signed-off-by: Frederic Weisbecker
    Cc: Mike Frysinger
    Cc: Guan Xuetao
    Cc: David Miller
    Cc: Chris Metcalf
    Cc: Hans-Christian Egtvedt
    Cc: Ralf Baechle
    Cc: Paul E. McKenney
    Cc: Ingo Molnar
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: H. Peter Anvin
    Cc: Russell King
    Cc: Paul Mackerras
    Cc: Heiko Carstens
    Cc: Paul Mundt
    Signed-off-by: Paul E. McKenney
    Reviewed-by: Josh Triplett

    Frederic Weisbecker
     

06 Dec, 2011

1 commit

22 Nov, 2011

2 commits

03 Nov, 2011

1 commit

  • de0a5345a   Merge branch 'for-linus' of git://github.com/richardweinberger/linux ... Browse Code »

    * 'for-linus' of git://github.com/richardweinberger/linux: (90 commits)
    um: fix ubd cow size
    um: Fix kmalloc argument order in um/vdso/vma.c
    um: switch to use of drivers/Kconfig
    UserModeLinux-HOWTO.txt: fix a typo
    UserModeLinux-HOWTO.txt: remove ^H characters
    um: we need sys/user.h only on i386
    um: merge delay_{32,64}.c
    um: distribute exports to where exported stuff is defined
    um: kill system-um.h
    um: generic ftrace.h will do...
    um: segment.h is x86-only and needed only there
    um: asm/pda.h is not needed anymore
    um: hw_irq.h can go generic as well
    um: switch to generic-y
    um: clean Kconfig up a bit
    um: a couple of missing dependencies...
    um: kill useless argument of free_chan() and free_one_chan()
    um: unify ptrace_user.h
    um: unify KSTK_...
    um: fix gcov build breakage
    ...

    Linus Torvalds
     

02 Nov, 2011

30 commits