Eric Lee / smarc-ti-linux-kernel

30 Apr, 2014

1 commit

  • 8aa9e85ad   ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe ... Browse Code »
    5

    There was a very small race window where resume to kernel mode from a
    Exception Path (or pure kernel mode which is true for most of ARC
    exceptions anyways), was not disabling interrupts in restore_regs,
    clobbering the exception regs

    Anton found the culprit call flow (after many sleepless nights)

    | 1. we got a Trap from user land
    | 2. started to service it.
    | 3. While doing some stuff on user-land memory (I think it is padzero()),
    | we got a DataTlbMiss
    | 4. On return from it we are taking "resume_kernel_mode" path
    | 5. NEED_RESHED is not set, so we go to "return from exception" path in
    | restore regs.
    | 6. there seems to be IRQ happening

    Signed-off-by: Vineet Gupta
    Cc: #3.10, 3.12, 3.13, 3.14
    Cc: Anton Kolesov
    Cc: Francois Bedard
    Signed-off-by: Linus Torvalds

    Vineet Gupta
     

19 Apr, 2014

1 commit

  • 64ee9f32c   ARC: Delete stale barrier.h ... Browse Code »
    3

    Commit 93ea02bb8435 ("arch: Clean up asm/barrier.h implementations")
    wired generic barrier.h for ARC, but failed to delete the existing file.

    In 3.15, due to rcupdate.h updates, this causes a build breakage on ARC:

    CC arch/arc/kernel/asm-offsets.s
    In file included from include/linux/sched.h:45:0,
    from arch/arc/kernel/asm-offsets.c:9:
    include/linux/rculist.h: In function __list_add_rcu:
    include/linux/rculist.h:54:2: error: implicit declaration of function smp_store_release [-Werror=implicit-function-declaration]
    rcu_assign_pointer(list_next_rcu(prev), new);
    ^

    Cc: Peter Zijlstra
    Signed-off-by: Vineet Gupta
    Signed-off-by: Linus Torvalds

    Vineet Gupta
     

08 Apr, 2014

2 commits

  • 3573d3869   Merge tag 'arc-v3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc ... Browse Code »

    Pull ARC changes from Vineet Gupta:
    - Support for external initrd from Noam
    - Fix broken serial console in nsimosci Virtual Platform
    - Reuse of ENTRY/END assembler macros across hand asm code
    - Other minor fixes here and there

    * tag 'arc-v3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
    ARC: [nsimosci] Unbork console
    ARC: [nsimosci] Change .dts to use generic 8250 UART
    ARC: [SMP] General Fixes
    ARC: Remove unused DT template file
    ARC: [clockevent] simplify timer ISR
    ARC: [clockevent] can't be SoC specific
    ARC: Remove ARC_HAS_COH_RTSC
    ARC: switch to generic ENTRY/END assembler annotations
    ARC: support external initrd
    ARC: add uImage to .gitignore
    ARC: [arcfpga] Fix __initconst data const-correctness

    Linus Torvalds
     
  • 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
     

05 Apr, 2014

3 commits

  • 61fb4bfc0   ARC: [nsimosci] Unbork console ... Browse Code »
    5

    Despite the switch to right UART driver (prev patch), serial console
    still doesn't work due to missing CONFIG_SERIAL_OF_PLATFORM

    Also fix the default cmdline in DT to not refer to out-of-tree
    ARC framebuffer driver for console.

    Signed-off-by: Vineet Gupta
    Cc: #3.10, 3.12, 3.13, 3.14
    Cc: Francois Bedard

    Vineet Gupta
     
  • 6eda477b3   ARC: [nsimosci] Change .dts to use generic 8250 UART ... Browse Code »
    5

    The Synopsys APB DW UART has a couple of special features that are not
    in the System C model. In 3.8, the 8250_dw driver didn't really use these
    features, but from 3.9 onwards, the 8250_dw driver has become incompatible
    with our model.

    Signed-off-by: Mischa Jonker
    Signed-off-by: Vineet Gupta
    Cc: #3.10, 3.12, 3.13, 3.14
    Cc: Francois Bedard

    Mischa Jonker
     
  • c3441edd2   ARC: [SMP] General Fixes ... Browse Code »
    5

    -Pass the expected arg to non-boot park'ing routine
    (It worked so far because existing SMP backends don't use the arg)

    -CONFIG_DEBUG_PREEMPT warning

    Vineet Gupta
     

03 Apr, 2014

1 commit

  • 159d8133d   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    Pull trivial tree updates from Jiri Kosina:
    "Usual rocket science -- mostly documentation and comment updates"

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
    sparse: fix comment
    doc: fix double words
    isdn: capi: fix "CAPI_VERSION" comment
    doc: DocBook: Fix typos in xml and template file
    Bluetooth: add module name for btwilink
    driver core: unexport static function create_syslog_header
    mmc: core: typo fix in printk specifier
    ARM: spear: clean up editing mistake
    net-sysfs: fix comment typo 'CONFIG_SYFS'
    doc: Insert MODULE_ in module-signing macros
    Documentation: update URL to hfsplus Technote 1150
    gpio: update path to documentation
    ixgbe: Fix format string in ixgbe_fcoe.
    Kconfig: Remove useless "default N" lines
    user_namespace.c: Remove duplicated word in comment
    CREDITS: fix formatting
    treewide: Fix typo in Documentation/DocBook
    mm: Fix warning on make htmldocs caused by slab.c
    ata: ata-samsung_cf: cleanup in header file
    idr: remove unused prototype of idr_free()

    Linus Torvalds
     

01 Apr, 2014

1 commit

  • 462bf234a   Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ... Browse Code »

    Pull core locking updates from Ingo Molnar:
    "The biggest change is the MCS spinlock generalization changes from Tim
    Chen, Peter Zijlstra, Jason Low et al. There's also lockdep
    fixes/enhancements from Oleg Nesterov, in particular a false negative
    fix related to lockdep_set_novalidate_class() usage"

    * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
    locking/mutex: Fix debug checks
    locking/mutexes: Add extra reschedule point
    locking/mutexes: Introduce cancelable MCS lock for adaptive spinning
    locking/mutexes: Unlock the mutex without the wait_lock
    locking/mutexes: Modify the way optimistic spinners are queued
    locking/mutexes: Return false if task need_resched() in mutex_can_spin_on_owner()
    locking: Move mcs_spinlock.h into kernel/locking/
    m68k: Skip futex_atomic_cmpxchg_inatomic() test
    futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test
    Revert "sched/wait: Suppress Sparse 'variable shadowing' warning"
    lockdep: Change lockdep_set_novalidate_class() to use _and_name
    lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no_validate
    lockdep: Don't create the wrong dependency on hlock->check == 0
    lockdep: Make held_lock->check and "int check" argument bool
    locking/mcs: Allow architecture specific asm files to be used for contended case
    locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order
    sched/wait: Suppress Sparse 'variable shadowing' warning
    hung_task/Documentation: Fix hung_task_warnings description
    locking/mcs: Allow architectures to hook in to contended paths
    locking/mcs: Micro-optimize the MCS code, add extra comments
    ...

    Linus Torvalds
     

31 Mar, 2014

1 commit

26 Mar, 2014

7 commits

08 Mar, 2014

1 commit

  • b053940df   ARC: Use correct PTAG register for icache flush ... Browse Code »

    This fixes a subtle issue with cache flush which could potentially cause
    random userspace crashes because of stale icache lines.

    This error crept in when consolidating the cache flush code

    Fixes: bd12976c3664 (ARC: cacheflush refactor #3: Unify the {d,i}cache)
    Signed-off-by: Vineet Gupta
    Cc: linux-kernel@vger.kernel.org
    Cc: stable@vger.kernel.org # 3.13
    Cc: arc-linux-dev@synopsys.com
    Signed-off-by: Linus Torvalds

    Vineet Gupta
     

20 Feb, 2014

2 commits

10 Feb, 2014

2 commits

  • ddf1d169c   locking/mcs: Allow architecture specific asm files to be used for contended case ... Browse Code »

    This patch allows each architecture to add its specific assembly optimized
    arch_mcs_spin_lock_contended and arch_mcs_spinlock_uncontended for
    MCS lock and unlock functions.

    Signed-off-by: Tim Chen
    Cc: Scott J Norton
    Cc: Raghavendra K T
    Cc: AswinChandramouleeswaran
    Cc: George Spelvin
    Cc: Rik vanRiel
    Cc: Andrea Arcangeli
    Cc: MichelLespinasse
    Cc: Peter Hurley
    Cc: Andi Kleen
    Cc: Alex Shi
    Cc: Dave Hansen
    Cc: Tim Chen
    Cc: Arnd Bergmann
    Cc: "Figo.zhang"
    Cc: "Paul E.McKenney"
    Cc: "H. Peter Anvin"
    Cc: Davidlohr Bueso
    Cc: Waiman Long
    Cc: Ingo Molnar
    Cc: Will Deacon
    Cc: Andrew Morton
    Cc: Linus Torvalds
    Cc: Matthew R Wilcox
    Signed-off-by: Peter Zijlstra
    Link: http://lkml.kernel.org/r/1390347382.3138.67.camel@schen9-DESK
    Signed-off-by: Ingo Molnar

    Tim Chen
     
  • b119fa61d   locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order ... Browse Code »

    We perform a clean up of the Kbuid files in each architecture.
    We order the files in each Kbuild in alphabetical order
    by running the below script.

    for i in arch/*/include/asm/Kbuild
    do
    cat $i | gawk '/^generic-y/ {
    i = 3;
    do {
    for (; i ${i}.sorted;
    mv ${i}.sorted $i;
    done

    Signed-off-by: Tim Chen
    Cc: Arnd Bergmann
    Cc: Matthew R Wilcox
    Cc: AswinChandramouleeswaran
    Cc: Dave Hansen
    Cc: "Paul E.McKenney"
    Cc: Scott J Norton
    Cc: Will Deacon
    Cc: "Figo.zhang"
    Cc: Linus Torvalds
    Cc: Rik van Riel
    Cc: Waiman Long
    Cc: Peter Hurley
    Cc: Andrea Arcangeli
    Cc: Tim Chen
    Cc: Alex Shi
    Cc: Raghavendra K T
    Cc: Andi Kleen
    Cc: George Spelvin
    Cc: MichelLespinasse
    Cc: Ingo Molnar
    Cc: "H. Peter Anvin"
    Cc: Davidlohr Bueso
    Cc: Andrew Morton
    Signed-off-by: Peter Zijlstra
    [ Fixed build bug. ]
    Signed-off-by: Ingo Molnar

    Tim Chen
     

31 Jan, 2014

1 commit

  • 597690cd0   Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild ... Browse Code »

    Pull kbuild changes from Michal Marek:
    - fix make -s detection with make-4.0
    - fix for scripts/setlocalversion when the kernel repository is a
    submodule
    - do not hardcode ';' in macros that expand to assembler code, as some
    architectures' assemblers use a different character for newline
    - Fix passing --gdwarf-2 to the assembler

    * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
    frv: Remove redundant debugging info flag
    mn10300: Remove redundant debugging info flag
    kbuild: Fix debugging info generation for .S files
    arch: use ASM_NL instead of ';' for assembler new line character in the macro
    kbuild: Fix silent builds with make-4
    Fix detectition of kernel git repository in setlocalversion script [take #2]

    Linus Torvalds
     

28 Jan, 2014

1 commit

26 Jan, 2014

2 commits

  • 4ba9920e5   Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next ... Browse Code »

    Pull networking updates from David Miller:

    1) BPF debugger and asm tool by Daniel Borkmann.

    2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann.

    3) Correct reciprocal_divide and update users, from Hannes Frederic
    Sowa and Daniel Borkmann.

    4) Currently we only have a "set" operation for the hw timestamp socket
    ioctl, add a "get" operation to match. From Ben Hutchings.

    5) Add better trace events for debugging driver datapath problems, also
    from Ben Hutchings.

    6) Implement auto corking in TCP, from Eric Dumazet. Basically, if we
    have a small send and a previous packet is already in the qdisc or
    device queue, defer until TX completion or we get more data.

    7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko.

    8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel
    Borkmann.

    9) Share IP header compression code between Bluetooth and IEEE802154
    layers, from Jukka Rissanen.

    10) Fix ipv6 router reachability probing, from Jiri Benc.

    11) Allow packets to be captured on macvtap devices, from Vlad Yasevich.

    12) Support tunneling in GRO layer, from Jerry Chu.

    13) Allow bonding to be configured fully using netlink, from Scott
    Feldman.

    14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can
    already get the TCI. From Atzm Watanabe.

    15) New "Heavy Hitter" qdisc, from Terry Lam.

    16) Significantly improve the IPSEC support in pktgen, from Fan Du.

    17) Allow ipv4 tunnels to cache routes, just like sockets. From Tom
    Herbert.

    18) Add Proportional Integral Enhanced packet scheduler, from Vijay
    Subramanian.

    19) Allow openvswitch to mmap'd netlink, from Thomas Graf.

    20) Key TCP metrics blobs also by source address, not just destination
    address. From Christoph Paasch.

    21) Support 10G in generic phylib. From Andy Fleming.

    22) Try to short-circuit GRO flow compares using device provided RX
    hash, if provided. From Tom Herbert.

    The wireless and netfilter folks have been busy little bees too.

    * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits)
    net/cxgb4: Fix referencing freed adapter
    ipv6: reallocate addrconf router for ipv6 address when lo device up
    fib_frontend: fix possible NULL pointer dereference
    rtnetlink: remove IFLA_BOND_SLAVE definition
    rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info
    qlcnic: update version to 5.3.55
    qlcnic: Enhance logic to calculate msix vectors.
    qlcnic: Refactor interrupt coalescing code for all adapters.
    qlcnic: Update poll controller code path
    qlcnic: Interrupt code cleanup
    qlcnic: Enhance Tx timeout debugging.
    qlcnic: Use bool for rx_mac_learn.
    bonding: fix u64 division
    rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC
    sfc: Use the correct maximum TX DMA ring size for SFC9100
    Add Shradha Shah as the sfc driver maintainer.
    net/vxlan: Share RX skb de-marking and checksum checks with ovs
    tulip: cleanup by using ARRAY_SIZE()
    ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called
    net/cxgb4: Don't retrieve stats during recovery
    ...

    Linus Torvalds
     
  • 7ae0e06b9   Merge tag 'arc-v3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc ... Browse Code »

    Pull ARC changes from Vineet Gupta:
    - IPI optimization and cleanups
    - Support for bootloader provided external Device Tree blobs

    * tag 'arc-v3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
    ARC: [cmdline] support External Device Trees from u-boot
    ARC: [cmdline] uboot cmdline handling rework
    ARC: [SMP] optimize IPI send and receive
    ARC: [SMP] simplify IPI code
    ARC: [SMP] cpu halt interface doesn't need "self" cpu-id
    ARC: [SMP] IPI ACK interface doesn't need "self" cpu-id
    ARC: [SMP] cpumask not needed in IPI send path

    Linus Torvalds
     

24 Jan, 2014

1 commit

  • 4a4741577   Kconfig: update flightly outdated CONFIG_SMP documentation ... Browse Code »

    Remove an outdated reference to "most personal computers" having only one
    CPU, and change the use of "singleprocessor" and "single processor" in
    CONFIG_SMP's documentation to "uniprocessor" across all arches where that
    documentation is present.

    Signed-off-by: Robert Graffham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Robert Graffham
     

16 Jan, 2014

2 commits

14 Jan, 2014

2 commits

13 Jan, 2014

1 commit

12 Jan, 2014

2 commits

  • 93ea02bb8   arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h ... Browse Code »
    17

    We're going to be adding a few new barrier primitives, and in order to
    avoid endless duplication make more agressive use of
    asm-generic/barrier.h.

    Change the asm-generic/barrier.h such that it allows partial barrier
    definitions and fills out the rest with defaults.

    There are a few architectures (m32r, m68k) that could probably
    do away with their barrier.h file entirely but are kept for now due to
    their unconventional nop() implementation.

    Suggested-by: Geert Uytterhoeven
    Reviewed-by: "Paul E. McKenney"
    Reviewed-by: Mathieu Desnoyers
    Signed-off-by: Peter Zijlstra
    Cc: Michael Ellerman
    Cc: Michael Neuling
    Cc: Russell King
    Cc: Heiko Carstens
    Cc: Linus Torvalds
    Cc: Martin Schwidefsky
    Cc: Victor Kaplansky
    Cc: Tony Luck
    Cc: Oleg Nesterov
    Cc: Benjamin Herrenschmidt
    Cc: Frederic Weisbecker
    Link: http://lkml.kernel.org/r/20131213150640.846368594@infradead.org
    Signed-off-by: Ingo Molnar

    Peter Zijlstra
     
  • 1de7da377   arch: Move smp_mb__{before,after}_atomic_{inc,dec}.h into asm/atomic.h ... Browse Code »

    Move the barriers functions that depend on the atomic implementation
    into the atomic implementation.

    Reviewed-by: Paul E. McKenney
    Signed-off-by: Peter Zijlstra
    Acked-by: Vineet Gupta [for arch/arc bits]
    Cc: Peter Zijlstra
    Cc: Linus Torvalds
    Cc: Andrew Morton
    Cc: Thomas Gleixner
    Cc: Paul E. McKenney
    Link: http://lkml.kernel.org/r/20131213150640.786183683@infradead.org
    Signed-off-by: Ingo Molnar

    Peter Zijlstra
     

07 Jan, 2014

1 commit

23 Dec, 2013

5 commits