Eric Lee / smarc-fsl-linux-kernel

27 Jul, 2011

1 commit

  • 60063497a   atomic: use <linux/atomic.h> ... Browse Code »

    This allows us to move duplicated code in
    (atomic_inc_not_zero() for now) to

    Signed-off-by: Arun Sharma
    Reviewed-by: Eric Dumazet
    Cc: Ingo Molnar
    Cc: David Miller
    Cc: Eric Dumazet
    Acked-by: Mike Frysinger
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arun Sharma
     

15 Mar, 2011

1 commit

  • 6667deb69   MIPS: Move idle task creation to work queue ... Browse Code »

    To avoid forking usermode thread when creating an idle task, move fork_idle
    to a work queue.

    If kernel starts with maxcpus= option which does not bring all available
    cpus online at boot time, idle tasks for offline cpus are not created. If
    later offline cpus are hotplugged through sysfs, __cpu_up is called in
    the context of the user task, and fork_idle copies its non-zero mm
    pointer. This causes BUG() in per_cpu_trap_init.

    This also avoids issues with resource limits of the CPU writing to sysfs,
    containers, maybe others.

    Signed-off-by: Maksim Rayskiy
    To: linux-mips@linux-mips.org
    Patchwork: https://patchwork.linux-mips.org/patch/2070/
    Signed-off-by: Ralf Baechle

    Maksim Rayskiy
     

05 Aug, 2010

1 commit

17 Dec, 2009

1 commit

  • 8f99a1626   MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS ... Browse Code »

    This patch add a new section for MIPS to record the block of the hardirq
    handling for function graph tracer(print_graph_irq) via adding the
    __irq_entry annotation to the the entrypoints of the hardirqs(the block
    with irq_enter()...irq_exit()).

    Thanks goes to Steven & Frederic Weisbecker for their feedbacks.

    Signed-off-by: Wu Zhangjin
    Cc: Steven Rostedt
    Cc: Nicholas Mc Guire
    Cc: zhangfx@lemote.com
    Cc: Wu Zhangjin
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Frederic Weisbecker
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    Reviewed-by: Frederic Weisbecker
    Patchwork: http://patchwork.linux-mips.org/patch/676/
    Signed-off-by: Ralf Baechle

    Wu Zhangjin
     

01 Oct, 2009

3 commits

24 Sep, 2009

2 commits

  • 4037ac6e2   cpumask: Use accessors for cpu_*_mask: mips ... Browse Code »

    Use the accessors rather than frobbing bits directly (the new versions
    are const).

    Signed-off-by: Rusty Russell
    Signed-off-by: Mike Travis

    Rusty Russell
     
  • 48a048fed   cpumask: arch_send_call_function_ipi_mask: mips ... Browse Code »

    We're weaning the core code off handing cpumask's around on-stack.
    This introduces arch_send_call_function_ipi_mask(), and by defining
    it, the old arch_send_call_function_ipi is defined by the core code.

    We also take the chance to wean the implementations off the
    obsolescent for_each_cpu_mask(): making send_ipi_mask take the pointer
    seemed the most natural way to ensure all implementations used
    for_each_cpu.

    Signed-off-by: Rusty Russell

    Rusty Russell
     

18 Sep, 2009

1 commit

25 Jun, 2009

2 commits

  • 1b2bc75c1   MIPS: Add arch generic CPU hotplug ... Browse Code »

    Each platform has to add support for CPU hotplugging itself by providing
    suitable definitions for the cpu_disable and cpu_die of the smp_ops
    methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set
    SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the
    necessary changes. This patch contains the changes to the dummy smp_ops
    definition for uni-processor systems.

    Parts of the code contributed by Cavium Inc.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     
  • 631330f58   MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. ... Browse Code »

    Some of the were relying into smp.h being dragged in by another header
    which of course is fragile. uses smp_processor_id()
    only in macros and including smp.h there leads to an include loop, so
    don't change cpu-info.h.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     

30 Mar, 2009

1 commit

13 Dec, 2008

1 commit

  • 98a79d6a5   cpumask: centralize cpu_online_map and cpu_possible_map ... Browse Code »

    Impact: cleanup

    Each SMP arch defines these themselves. Move them to a central
    location.

    Twists:
    1) Some archs (m32, parisc, s390) set possible_map to all 1, so we add a
    CONFIG_INIT_ALL_POSSIBLE for this rather than break them.

    2) mips and sparc32 '#define cpu_possible_map phys_cpu_present_map'.
    Those archs simply have phys_cpu_present_map replaced everywhere.

    3) Alpha defined cpu_possible_map to cpu_present_map; this is tricky
    so I just manipulate them both in sync.

    4) IA64, cris and m32r have gratuitous 'extern cpumask_t cpu_possible_map'
    declarations.

    Signed-off-by: Rusty Russell
    Reviewed-by: Grant Grundler
    Tested-by: Tony Luck
    Acked-by: Ingo Molnar
    Cc: Mike Travis
    Cc: ink@jurassic.park.msu.ru
    Cc: rmk@arm.linux.org.uk
    Cc: starvik@axis.com
    Cc: tony.luck@intel.com
    Cc: takata@linux-m32r.org
    Cc: ralf@linux-mips.org
    Cc: grundler@parisc-linux.org
    Cc: paulus@samba.org
    Cc: schwidefsky@de.ibm.com
    Cc: lethal@linux-sh.org
    Cc: wli@holomorphy.com
    Cc: davem@davemloft.net
    Cc: jdike@addtoit.com
    Cc: mingo@redhat.com

    Rusty Russell
     

30 Oct, 2008

1 commit

28 Oct, 2008

1 commit

09 Sep, 2008

1 commit

  • e545a6140   kernel/cpu.c: create a CPU_STARTING cpu_chain notifier ... Browse Code »

    Right now, there is no notifier that is called on a new cpu, before the new
    cpu begins processing interrupts/softirqs.
    Various kernel function would need that notification, e.g. kvm works around
    by calling smp_call_function_single(), rcu polls cpu_online_map.

    The patch adds a CPU_STARTING notification. It also adds a helper function
    that sends the message to all cpu_chain handlers.

    Tested on x86-64.
    All other archs are untested. Especially on sparc, I'm not sure if I got
    it right.

    Signed-off-by: Manfred Spraul
    Signed-off-by: Ingo Molnar

    Manfred Spraul
     

26 Jun, 2008

3 commits

16 Jun, 2008

1 commit

12 May, 2008

1 commit

29 Apr, 2008

1 commit

07 Feb, 2008

1 commit

  • 6c81c32f9   calibrate_delay() must be __cpuinit ... Browse Code »

    calibrate_delay() must be __cpuinit, not __{dev,}init.

    I've verified that this is correct for all users.

    While doing the latter, I also did the following cleanups:
    - remove pointless additional prototypes in C files
    - ensure all users #include

    This fixes the following section mismatches with CONFIG_HOTPLUG=n,
    CONFIG_HOTPLUG_CPU=y:

    WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder')
    WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map')

    Signed-off-by: Adrian Bunk
    Cc: Ivan Kokshaysky
    Cc: Richard Henderson
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: "David S. Miller"
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Cc: Christian Zankel
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Adrian Bunk
     

29 Jan, 2008

2 commits

13 Oct, 2007

1 commit

12 Oct, 2007

5 commits

01 Aug, 2007

1 commit

30 Jul, 2007

1 commit

  • 4e950f6f0   Remove fs.h from mm.h ... Browse Code »

    Remove fs.h from mm.h. For this,
    1) Uninline vma_wants_writenotify(). It's pretty huge anyway.
    2) Add back fs.h or less bloated headers (err.h) to files that need it.

    As result, on x86_64 allyesconfig, fs.h dependencies cut down from 3929 files
    rebuilt down to 3444 (-12.3%).

    Cross-compile tested without regressions on my two usual configs and (sigh):

    alpha arm-mx1ads mips-bigsur powerpc-ebony
    alpha-allnoconfig arm-neponset mips-capcella powerpc-g5
    alpha-defconfig arm-netwinder mips-cobalt powerpc-holly
    alpha-up arm-netx mips-db1000 powerpc-iseries
    arm arm-ns9xxx mips-db1100 powerpc-linkstation
    arm-assabet arm-omap_h2_1610 mips-db1200 powerpc-lite5200
    arm-at91rm9200dk arm-onearm mips-db1500 powerpc-maple
    arm-at91rm9200ek arm-picotux200 mips-db1550 powerpc-mpc7448_hpc2
    arm-at91sam9260ek arm-pleb mips-ddb5477 powerpc-mpc8272_ads
    arm-at91sam9261ek arm-pnx4008 mips-decstation powerpc-mpc8313_rdb
    arm-at91sam9263ek arm-pxa255-idp mips-e55 powerpc-mpc832x_mds
    arm-at91sam9rlek arm-realview mips-emma2rh powerpc-mpc832x_rdb
    arm-ateb9200 arm-realview-smp mips-excite powerpc-mpc834x_itx
    arm-badge4 arm-rpc mips-fulong powerpc-mpc834x_itxgp
    arm-carmeva arm-s3c2410 mips-ip22 powerpc-mpc834x_mds
    arm-cerfcube arm-shannon mips-ip27 powerpc-mpc836x_mds
    arm-clps7500 arm-shark mips-ip32 powerpc-mpc8540_ads
    arm-collie arm-simpad mips-jazz powerpc-mpc8544_ds
    arm-corgi arm-spitz mips-jmr3927 powerpc-mpc8560_ads
    arm-csb337 arm-trizeps4 mips-malta powerpc-mpc8568mds
    arm-csb637 arm-versatile mips-mipssim powerpc-mpc85xx_cds
    arm-ebsa110 i386 mips-mpc30x powerpc-mpc8641_hpcn
    arm-edb7211 i386-allnoconfig mips-msp71xx powerpc-mpc866_ads
    arm-em_x270 i386-defconfig mips-ocelot powerpc-mpc885_ads
    arm-ep93xx i386-up mips-pb1100 powerpc-pasemi
    arm-footbridge ia64 mips-pb1500 powerpc-pmac32
    arm-fortunet ia64-allnoconfig mips-pb1550 powerpc-ppc64
    arm-h3600 ia64-bigsur mips-pnx8550-jbs powerpc-prpmc2800
    arm-h7201 ia64-defconfig mips-pnx8550-stb810 powerpc-ps3
    arm-h7202 ia64-gensparse mips-qemu powerpc-pseries
    arm-hackkit ia64-sim mips-rbhma4200 powerpc-up
    arm-integrator ia64-sn2 mips-rbhma4500 s390
    arm-iop13xx ia64-tiger mips-rm200 s390-allnoconfig
    arm-iop32x ia64-up mips-sb1250-swarm s390-defconfig
    arm-iop33x ia64-zx1 mips-sead s390-up
    arm-ixp2000 m68k mips-tb0219 sparc
    arm-ixp23xx m68k-amiga mips-tb0226 sparc-allnoconfig
    arm-ixp4xx m68k-apollo mips-tb0287 sparc-defconfig
    arm-jornada720 m68k-atari mips-workpad sparc-up
    arm-kafa m68k-bvme6000 mips-wrppmc sparc64
    arm-kb9202 m68k-hp300 mips-yosemite sparc64-allnoconfig
    arm-ks8695 m68k-mac parisc sparc64-defconfig
    arm-lart m68k-mvme147 parisc-allnoconfig sparc64-up
    arm-lpd270 m68k-mvme16x parisc-defconfig um-x86_64
    arm-lpd7a400 m68k-q40 parisc-up x86_64
    arm-lpd7a404 m68k-sun3 powerpc x86_64-allnoconfig
    arm-lubbock m68k-sun3x powerpc-cell x86_64-defconfig
    arm-lusl7200 mips powerpc-celleb x86_64-up
    arm-mainstone mips-atlas powerpc-chrp32

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

11 Jul, 2007

1 commit

10 Jul, 2007

1 commit

  • 0437e109e   sched: zap the migration init / cache-hot balancing code ... Browse Code »

    the SMP load-balancer uses the boot-time migration-cost estimation
    code to attempt to improve the quality of balancing. The reason for
    this code is that the discrete priority queues do not preserve
    the order of scheduling accurately, so the load-balancer skips
    tasks that were running on a CPU 'recently'.

    this code is fundamental fragile: the boot-time migration cost detector
    doesnt really work on systems that had large L3 caches, it caused boot
    delays on large systems and the whole cache-hot concept made the
    balancing code pretty undeterministic as well.

    (and hey, i wrote most of it, so i can say it out loud that it sucks ;-)

    under CFS the same purpose of cache affinity can be achieved without
    any special cache-hot special-case: tasks are sorted in the 'timeline'
    tree and the SMP balancer picks tasks from the left side of the
    tree, thus the most cache-cold task is balanced automatically.

    Signed-off-by: Ingo Molnar

    Ingo Molnar
     

12 Jun, 2007

1 commit

  • 4ebd5233f   [MIPS] Fix modpost warnings by making start_secondary __cpuinit ... Browse Code »

    WARNING: arch/mips/kernel/built-in.o(.text+0x9a58): Section mismatch: reference to .init.text:cpu_report (between 'start_secondary' and 'smp_prepare_boot_cpu')
    WARNING: arch/mips/kernel/built-in.o(.text+0x9a60): Section mismatch: reference to .init.text:per_cpu_trap_init (between 'start_secondary' and 'smp_prepare_boot_cpu')
    WARNING: arch/mips/kernel/built-in.o(.text+0x9adc): Section mismatch: reference to .init.text:cpu_probe (between 'start_secondary' and 'smp_prepare_boot_cpu')
    mipsel-linux-objcopy -S -O srec --remove-section=.reginfo --remove-section=.mdebug --remove-section=.comment --remove-section=.note --remove-section=.pdr --remove-section=.options --remove-section=.MIPS.options vmlinux arch/mips/boot/vmlinux.srec

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     

22 Feb, 2007

1 commit

12 Jan, 2007

1 commit

  • b282b6f8a   [PATCH] Change cpu_up and co from __devinit to __cpuinit ... Browse Code »

    Compiling the kernel with CONFIG_HOTPLUG = y and CONFIG_HOTPLUG_CPU = n
    with CONFIG_RELOCATABLE = y generates the following modpost warnings

    WARNING: vmlinux - Section mismatch: reference to .init.data: from
    .text between '_cpu_up' (at offset 0xc0141b7d) and 'cpu_up'
    WARNING: vmlinux - Section mismatch: reference to .init.data: from
    .text between '_cpu_up' (at offset 0xc0141b9c) and 'cpu_up'
    WARNING: vmlinux - Section mismatch: reference to .init.text:__cpu_up
    from .text between '_cpu_up' (at offset 0xc0141bd8) and 'cpu_up'
    WARNING: vmlinux - Section mismatch: reference to .init.data: from
    .text between '_cpu_up' (at offset 0xc0141c05) and 'cpu_up'
    WARNING: vmlinux - Section mismatch: reference to .init.data: from
    .text between '_cpu_up' (at offset 0xc0141c26) and 'cpu_up'
    WARNING: vmlinux - Section mismatch: reference to .init.data: from
    .text between '_cpu_up' (at offset 0xc0141c37) and 'cpu_up'

    This is because cpu_up, _cpu_up and __cpu_up (in some architectures) are
    defined as __devinit
    AND
    __cpu_up calls some __cpuinit functions.

    Since __cpuinit would map to __init with this kind of a configuration,
    we get a .text refering .init.data warning.

    This patch solves the problem by converting all of __cpu_up, _cpu_up
    and cpu_up from __devinit to __cpuinit. The approach is justified since
    the callers of cpu_up are either dependent on CONFIG_HOTPLUG_CPU or
    are of __init type.

    Thus when CONFIG_HOTPLUG_CPU=y, all these cpu up functions would land up
    in .text section, and when CONFIG_HOTPLUG_CPU=n, all these functions would
    land up in .init section.

    Tested on a i386 SMP machine running linux-2.6.20-rc3-mm1.

    Signed-off-by: Gautham R Shenoy
    Cc: Vivek Goyal
    Cc: Mikael Starvik
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: "David S. Miller"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Gautham R Shenoy
     

05 Dec, 2006

1 commit