Eric Lee / linux-smarc-t335x-v3.2

15 Sep, 2010

2 commits

  • eefdca043   x86-64, compat: Retruncate rax after ia32 syscall entry tracing ... Browse Code »

    In commit d4d6715, we reopened an old hole for a 64-bit ptracer touching a
    32-bit tracee in system call entry. A %rax value set via ptrace at the
    entry tracing stop gets used whole as a 32-bit syscall number, while we
    only check the low 32 bits for validity.

    Fix it by truncating %rax back to 32 bits after syscall_trace_enter,
    in addition to testing the full 64 bits as has already been added.

    Reported-by: Ben Hawkes
    Signed-off-by: Roland McGrath
    Signed-off-by: H. Peter Anvin

    Roland McGrath
     
  • 36d001c70   x86-64, compat: Test %rax for the syscall number, not %eax ... Browse Code »

    On 64 bits, we always, by necessity, jump through the system call
    table via %rax. For 32-bit system calls, in theory the system call
    number is stored in %eax, and the code was testing %eax for a valid
    system call number. At one point we loaded the stored value back from
    the stack to enforce zero-extension, but that was removed in checkin
    d4d67150165df8bf1cc05e532f6efca96f907cab. An actual 32-bit process
    will not be able to introduce a non-zero-extended number, but it can
    happen via ptrace.

    Instead of re-introducing the zero-extension, test what we are
    actually going to use, i.e. %rax. This only adds a handful of REX
    prefixes to the code.

    Reported-by: Ben Hawkes
    Signed-off-by: H. Peter Anvin
    Cc:
    Cc: Roland McGrath
    Cc: Andrew Morton

    H. Peter Anvin
     

14 Aug, 2010

1 commit

  • c78873252   Mark arguments to certain syscalls as being const ... Browse Code »

    Mark arguments to certain system calls as being const where they should be but
    aren't. The list includes:

    (*) The filename arguments of various stat syscalls, execve(), various utimes
    syscalls and some mount syscalls.

    (*) The filename arguments of some syscall helpers relating to the above.

    (*) The buffer argument of various write syscalls.

    Signed-off-by: David Howells
    Acked-by: David S. Miller
    Signed-off-by: Linus Torvalds

    David Howells
     

11 Aug, 2010

2 commits

  • 8cbd84f2d   x86: fix up system call numbering nit ... Browse Code »

    As pointed out by Jiri Slaby: when I resolved the the 32-bit x85 system
    call entry tables for prlimit (due to the conflict with fanotify), I
    forgot to add the numbering in comments that we do for every fifth entry.

    Reported-by: Jiri Slaby
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     
  • b34d8915c   Merge branch 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linux ... Browse Code »

    * 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linux:
    unistd: add __NR_prlimit64 syscall numbers
    rlimits: implement prlimit64 syscall
    rlimits: switch more rlimit syscalls to do_prlimit
    rlimits: redo do_setrlimit to more generic do_prlimit
    rlimits: add rlimit64 structure
    rlimits: do security check under task_lock
    rlimits: allow setrlimit to non-current tasks
    rlimits: split sys_setrlimit
    rlimits: selinux, do rlimits changes under task_lock
    rlimits: make sure ->rlim_max never grows in sys_setrlimit
    rlimits: add task_struct to update_rlimit_cpu
    rlimits: security, add task_struct to setrlimit

    Fix up various system call number conflicts. We not only added fanotify
    system calls in the meantime, but asm-generic/unistd.h added a wait4
    along with a range of reserved per-architecture system calls.

    Linus Torvalds
     

28 Jul, 2010

2 commits

16 Jul, 2010

1 commit

21 Apr, 2010

1 commit

  • 4cecd935f   x86: correctly wire up the newuname system call ... Browse Code »

    Before commit e28cbf22933d0c0ccaf3c4c27a1a263b41f73859 ("improve
    sys_newuname() for compat architectures") 64-bit x86 had a private
    implementation of sys_uname which was just called sys_uname, which other
    architectures used for the old uname.

    Due to some merge issues with the uname refactoring patches we ended up
    calling the old uname version for both the old and new system call
    slots, which lead to the domainname filed never be set which caused
    failures with libnss_nis.

    Reported-and-tested-by: Andy Isaacson
    Signed-off-by: Christoph Hellwig
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

13 Mar, 2010

3 commits

  • 5cacdb4ad   Add generic sys_olduname() ... Browse Code »

    Add generic implementations of the old and really old uname system calls.
    Note that sh only implements sys_olduname but not sys_oldolduname, but I'm
    not going to bother with another ifdef for that special case.

    m32r implemented an old uname but never wired it up, so kill it, too.

    Signed-off-by: Christoph Hellwig
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mundt
    Cc: Jeff Dike
    Cc: Hirokazu Takata
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Cc: H. Peter Anvin
    Cc: Al Viro
    Cc: Arnd Bergmann
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: "Luck, Tony"
    Cc: James Morris
    Cc: Andreas Schwab
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     
  • a4679373c   Add generic sys_old_mmap() ... Browse Code »

    Add a generic implementation of the old mmap() syscall, which expects its
    argument in a memory block and switch all architectures over to use it.

    Signed-off-by: Christoph Hellwig
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mundt
    Cc: Jeff Dike
    Cc: Hirokazu Takata
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Reviewed-by: H. Peter Anvin
    Cc: Al Viro
    Cc: Arnd Bergmann
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: "Luck, Tony"
    Cc: James Morris
    Cc: Andreas Schwab
    Acked-by: Jesper Nilsson
    Acked-by: Russell King
    Acked-by: Greg Ungerer
    Acked-by: David Howells
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     
  • 5d0e52830   Add generic sys_old_select() ... Browse Code »

    Add a generic implementation of the old select() syscall, which expects
    its argument in a memory block and switch all architectures over to use
    it.

    Signed-off-by: Christoph Hellwig
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mundt
    Cc: Jeff Dike
    Cc: Hirokazu Takata
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Reviewed-by: H. Peter Anvin
    Cc: Al Viro
    Cc: Arnd Bergmann
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: "Luck, Tony"
    Cc: James Morris
    Acked-by: Andreas Schwab
    Acked-by: Russell King
    Acked-by: Greg Ungerer
    Acked-by: David Howells
    Cc: Andreas Schwab
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

04 Mar, 2010

1 commit

  • fb7b096d9   Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip ... Browse Code »

    * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits)
    x86: Fix out of order of gsi
    x86: apic: Fix mismerge, add arch_probe_nr_irqs() again
    x86, irq: Keep chip_data in create_irq_nr and destroy_irq
    xen: Remove unnecessary arch specific xen irq functions.
    smp: Use nr_cpus= to set nr_cpu_ids early
    x86, irq: Remove arch_probe_nr_irqs
    sparseirq: Use radix_tree instead of ptrs array
    sparseirq: Change irq_desc_ptrs to static
    init: Move radix_tree_init() early
    irq: Remove unnecessary bootmem code
    x86: Add iMac9,1 to pci_reboot_dmi_table
    x86: Convert i8259_lock to raw_spinlock
    x86: Convert nmi_lock to raw_spinlock
    x86: Convert ioapic_lock and vector_lock to raw_spinlock
    x86: Avoid race condition in pci_enable_msix()
    x86: Fix SCI on IOAPIC != 0
    x86, ia32_aout: do not kill argument mapping
    x86, irq: Move __setup_vector_irq() before the first irq enable in cpu online path
    x86, irq: Update the vector domain for legacy irqs handled by io-apic
    x86, irq: Don't block IRQ0_VECTOR..IRQ15_VECTOR's on all cpu's
    ...

    Linus Torvalds
     

01 Mar, 2010

1 commit

  • f91b22c35   Merge branches 'core-ipi-for-linus', 'core-locking-for-linus', 'tracing-fixes-fo… ... Browse Code »

    …r-linus', 'x86-debug-for-linus', 'x86-doc-for-linus', 'x86-gpu-for-linus' and 'x86-rlimit-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

    * 'core-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    generic-ipi: Optimize accesses by using DEFINE_PER_CPU_SHARED_ALIGNED for IPI data

    * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    plist: Fix grammar mistake, and c-style mistake

    * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    kprobes: Add mcount to the kprobes blacklist

    * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    x86_64: Print modules like i386 does

    * 'x86-doc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    x86: Put 'nopat' in kernel-parameters

    * 'x86-gpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    x86-64: Allow fbdev primary video code

    * 'x86-rlimit-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    x86: Use helpers for rlimits

    Linus Torvalds
     

11 Feb, 2010

1 commit

  • 318f6b228   x86, ia32_aout: do not kill argument mapping ... Browse Code »

    Do not set current->mm->mmap to NULL in 32-bit emulation on 64-bit
    load_aout_binary after flush_old_exec as it would destroy already
    set brpm mapping with arguments.

    Introduced by b6a2fea39318e43fee84fa7b0b90d68bed92d2ba
    mm: variable length argument support
    where the argument mapping in bprm was added.

    [ hpa: this is a regression from 2.6.22... time to kill a.out? ]

    Signed-off-by: Jiri Slaby
    LKML-Reference:
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Ollie Wild
    Cc: x86@kernel.org
    Cc:
    Signed-off-by: H. Peter Anvin

    Jiri Slaby
     

30 Jan, 2010

2 commits

  • 05d43ed8a   x86: get rid of the insane TIF_ABI_PENDING bit ... Browse Code »

    Now that the previous commit made it possible to do the personality
    setting at the point of no return, we do just that for ELF binaries.
    And suddenly all the reasons for that insane TIF_ABI_PENDING bit go
    away, and we can just make SET_PERSONALITY() just do the obvious thing
    for a 32-bit compat process.

    Everything becomes much more straightforward this way.

    Signed-off-by: H. Peter Anvin
    Cc: stable@kernel.org
    Signed-off-by: Linus Torvalds

    H. Peter Anvin
     
  • 221af7f87   Split 'flush_old_exec' into two functions ... Browse Code »

    'flush_old_exec()' is the point of no return when doing an execve(), and
    it is pretty badly misnamed. It doesn't just flush the old executable
    environment, it also starts up the new one.

    Which is very inconvenient for things like setting up the new
    personality, because we want the new personality to affect the starting
    of the new environment, but at the same time we do _not_ want the new
    personality to take effect if flushing the old one fails.

    As a result, the x86-64 '32-bit' personality is actually done using this
    insane "I'm going to change the ABI, but I haven't done it yet" bit
    (TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
    personality, but just the "pending" bit, so that "flush_thread()" can do
    the actual personality magic.

    This patch in no way changes any of that insanity, but it does split the
    'flush_old_exec()' function up into a preparatory part that can fail
    (still called flush_old_exec()), and a new part that will actually set
    up the new exec environment (setup_new_exec()). All callers are changed
    to trivially comply with the new world order.

    Signed-off-by: H. Peter Anvin
    Cc: stable@kernel.org
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

28 Jan, 2010

1 commit

  • 2854e72b5   x86: Use helpers for rlimits ... Browse Code »

    Make sure compiler won't do weird things with limits. Fetching them
    twice may return 2 different values after writable limits are
    implemented.

    We can either use rlimit helpers added in
    3e10e716abf3c71bdb5d86b8f507f9e72236c9cd or ACCESS_ONCE if not
    applicable; this patch uses the helpers.

    Signed-off-by: Jiri Slaby
    LKML-Reference:
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Signed-off-by: H. Peter Anvin

    Jiri Slaby
     

11 Dec, 2009

1 commit

08 Dec, 2009

1 commit

  • d7fc02c7b   Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1815 commits)
    mac80211: fix reorder buffer release
    iwmc3200wifi: Enable wimax core through module parameter
    iwmc3200wifi: Add wifi-wimax coexistence mode as a module parameter
    iwmc3200wifi: Coex table command does not expect a response
    iwmc3200wifi: Update wiwi priority table
    iwlwifi: driver version track kernel version
    iwlwifi: indicate uCode type when fail dump error/event log
    iwl3945: remove duplicated event logging code
    b43: fix two warnings
    ipw2100: fix rebooting hang with driver loaded
    cfg80211: indent regulatory messages with spaces
    iwmc3200wifi: fix NULL pointer dereference in pmkid update
    mac80211: Fix TX status reporting for injected data frames
    ath9k: enable 2GHz band only if the device supports it
    airo: Fix integer overflow warning
    rt2x00: Fix padding bug on L2PAD devices.
    WE: Fix set events not propagated
    b43legacy: avoid PPC fault during resume
    b43: avoid PPC fault during resume
    tcp: fix a timewait refcnt race
    ...

    Fix up conflicts due to sysctl cleanups (dead sysctl_check code and
    CTL_UNNUMBERED removed) in
    kernel/sysctl_check.c
    net/ipv4/sysctl_net_ipv4.c
    net/ipv6/addrconf.c
    net/sctp/sysctl.c

    Linus Torvalds
     

19 Nov, 2009

1 commit

06 Nov, 2009

1 commit

26 Oct, 2009

1 commit

  • 81766741f   x86-64: Fix register leak in 32-bit syscall audting ... Browse Code »

    Restoring %ebp after the call to audit_syscall_exit() is not
    only unnecessary (because the register didn't get clobbered),
    but in the sysenter case wasn't even doing the right thing: It
    loaded %ebp from a location below the top of stack (RBP <
    ARGOFFSET), i.e. arbitrary kernel data got passed back to user
    mode in the register.

    Signed-off-by: Jan Beulich
    Acked-by: Roland McGrath
    Cc:
    LKML-Reference:
    Signed-off-by: Ingo Molnar

    Jan Beulich
     

13 Oct, 2009

1 commit

  • a2e272554   net: Introduce recvmmsg socket syscall ... Browse Code »

    Meaning receive multiple messages, reducing the number of syscalls and
    net stack entry/exit operations.

    Next patches will introduce mechanisms where protocols that want to
    optimize this operation will provide an unlocked_recvmsg operation.

    This takes into account comments made by:

    . Paul Moore: sock_recvmsg is called only for the first datagram,
    sock_recvmsg_nosec is used for the rest.

    . Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
    works in the same fashion as the ppoll one.

    If the underlying protocol returns a datagram with MSG_OOB set, this
    will make recvmmsg return right away with as many datagrams (+ the OOB
    one) it has received so far.

    . Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
    datagrams and then recvmsg returns an error, recvmmsg will return
    the successfully received datagrams, store the error and return it
    in the next call.

    This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
    where we will be able to acquire the lock only at batch start and end, not at
    every underlying recvmsg call.

    Signed-off-by: Arnaldo Carvalho de Melo
    Signed-off-by: David S. Miller

    Arnaldo Carvalho de Melo
     

01 Oct, 2009

1 commit

  • 24e35800c   x86: Don't leak 64-bit kernel register values to 32-bit processes ... Browse Code »

    While 32-bit processes can't directly access R8...R15, they can
    gain access to these registers by temporarily switching themselves
    into 64-bit mode.

    Therefore, registers not preserved anyway by called C functions
    (i.e. R8...R11) must be cleared prior to returning to user mode.

    Signed-off-by: Jan Beulich
    Cc:
    LKML-Reference:
    Signed-off-by: Ingo Molnar

    Jan Beulich
     

21 Sep, 2009

1 commit

  • cdd6c482c   perf: Do the big rename: Performance Counters -> Performance Events ... Browse Code »

    Bye-bye Performance Counters, welcome Performance Events!

    In the past few months the perfcounters subsystem has grown out its
    initial role of counting hardware events, and has become (and is
    becoming) a much broader generic event enumeration, reporting, logging,
    monitoring, analysis facility.

    Naming its core object 'perf_counter' and naming the subsystem
    'perfcounters' has become more and more of a misnomer. With pending
    code like hw-breakpoints support the 'counter' name is less and
    less appropriate.

    All in one, we've decided to rename the subsystem to 'performance
    events' and to propagate this rename through all fields, variables
    and API names. (in an ABI compatible fashion)

    The word 'event' is also a bit shorter than 'counter' - which makes
    it slightly more convenient to write/handle as well.

    Thanks goes to Stephane Eranian who first observed this misnomer and
    suggested a rename.

    User-space tooling and ABI compatibility is not affected - this patch
    should be function-invariant. (Also, defconfigs were not touched to
    keep the size down.)

    This patch has been generated via the following script:

    FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

    sed -i \
    -e 's/PERF_EVENT_/PERF_RECORD_/g' \
    -e 's/PERF_COUNTER/PERF_EVENT/g' \
    -e 's/perf_counter/perf_event/g' \
    -e 's/nb_counters/nb_events/g' \
    -e 's/swcounter/swevent/g' \
    -e 's/tpcounter_event/tp_event/g' \
    $FILES

    for N in $(find . -name perf_counter.[ch]); do
    M=$(echo $N | sed 's/perf_counter/perf_event/g')
    mv $N $M
    done

    FILES=$(find . -name perf_event.*)

    sed -i \
    -e 's/COUNTER_MASK/REG_MASK/g' \
    -e 's/COUNTER/EVENT/g' \
    -e 's/\/event_id/g' \
    -e 's/counter/event/g' \
    -e 's/Counter/Event/g' \
    $FILES

    ... to keep it as correct as possible. This script can also be
    used by anyone who has pending perfcounters patches - it converts
    a Linux kernel tree over to the new naming. We tried to time this
    change to the point in time where the amount of pending patches
    is the smallest: the end of the merge window.

    Namespace clashes were fixed up in a preparatory patch - and some
    stylistic fallout will be fixed up in a subsequent patch.

    ( NOTE: 'counters' are still the proper terminology when we deal
    with hardware registers - and these sed scripts are a bit
    over-eager in renaming them. I've undone some of that, but
    in case there's something left where 'counter' would be
    better than 'event' we can undo that on an individual basis
    instead of touching an otherwise nicely automated patch. )

    Suggested-by: Stephane Eranian
    Acked-by: Peter Zijlstra
    Acked-by: Paul Mackerras
    Reviewed-by: Arjan van de Ven
    Cc: Mike Galbraith
    Cc: Arnaldo Carvalho de Melo
    Cc: Frederic Weisbecker
    Cc: Steven Rostedt
    Cc: Benjamin Herrenschmidt
    Cc: David Howells
    Cc: Kyle McMartin
    Cc: Martin Schwidefsky
    Cc: "David S. Miller"
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc:
    LKML-Reference:
    Signed-off-by: Ingo Molnar

    Ingo Molnar
     

09 Aug, 2009

1 commit

01 May, 2009

2 commits

29 Apr, 2009

1 commit

21 Apr, 2009

1 commit

06 Apr, 2009

1 commit

  • f541ae326   Merge branch 'linus' into perfcounters/core-v2 ... Browse Code »

    Merge reason: we have gathered quite a few conflicts, need to merge upstream

    Conflicts:
    arch/powerpc/kernel/Makefile
    arch/x86/ia32/ia32entry.S
    arch/x86/include/asm/hardirq.h
    arch/x86/include/asm/unistd_32.h
    arch/x86/include/asm/unistd_64.h
    arch/x86/kernel/cpu/common.c
    arch/x86/kernel/irq.c
    arch/x86/kernel/syscall_table_32.S
    arch/x86/mm/iomap_32.c
    include/linux/sched.h
    kernel/Makefile

    Signed-off-by: Ingo Molnar

    Ingo Molnar
     

03 Apr, 2009

1 commit

  • f3554f4bc   preadv/pwritev: Add preadv and pwritev system calls. ... Browse Code »

    This patch adds preadv and pwritev system calls. These syscalls are a
    pretty straightforward combination of pread and readv (same for write).
    They are quite useful for doing vectored I/O in threaded applications.
    Using lseek+readv instead opens race windows you'll have to plug with
    locking.

    Other systems have such system calls too, for example NetBSD, check
    here: http://www.daemon-systems.org/man/preadv.2.html

    The application-visible interface provided by glibc should look like
    this to be compatible to the existing implementations in the *BSD family:

    ssize_t preadv(int d, const struct iovec *iov, int iovcnt, off_t offset);
    ssize_t pwritev(int d, const struct iovec *iov, int iovcnt, off_t offset);

    This prototype has one problem though: On 32bit archs is the (64bit)
    offset argument unaligned, which the syscall ABI of several archs doesn't
    allow to do. At least s390 needs a wrapper in glibc to handle this. As
    we'll need a wrappers in glibc anyway I've decided to push problem to
    glibc entriely and use a syscall prototype which works without
    arch-specific wrappers inside the kernel: The offset argument is
    explicitly splitted into two 32bit values.

    The patch sports the actual system call implementation and the windup in
    the x86 system call tables. Other archs follow as separate patches.

    Signed-off-by: Gerd Hoffmann
    Cc: Arnd Bergmann
    Cc: Al Viro
    Cc:
    Cc:
    Cc: Ralf Baechle
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Gerd Hoffmann
     

28 Mar, 2009

2 commits

  • 82268da1b   Merge branch 'linus' into percpu-cpumask-x86-for-linus-2 ... Browse Code »

    Conflicts:
    arch/sparc/kernel/time_64.c
    drivers/gpu/drm/drm_proc.c

    Manual merge to resolve build warning due to phys_addr_t type change
    on x86:

    drivers/gpu/drm/drm_info.c

    Signed-off-by: Ingo Molnar

    Ingo Molnar
     
  • 2b1c6bd77   generic compat_sys_ustat ... Browse Code »

    Due to a different size of ino_t ustat needs a compat handler, but
    currently only x86 and mips provide one. Add a generic compat_sys_ustat
    and switch all architectures over to it. Instead of doing various
    user copy hacks compat_sys_ustat just reimplements sys_ustat as
    it's trivial. This was suggested by Arnd Bergmann.

    Found by Eric Sandeen when running xfstests/017 on ppc64, which causes
    stack smashing warnings on RHEL/Fedora due to the too large amount of
    data writen by the syscall.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Al Viro

    Christoph Hellwig
     

26 Feb, 2009

1 commit

23 Feb, 2009

3 commits