Eric Lee / smarc-fsl-linux-kernel

19 Oct, 2007

6 commits

  • 7058cb02d   sysctl: deprecate sys_sysctl in a user space visible fashion. ... Browse Code »

    After adding checking to register_sysctl_table and finding a whole new set
    of bugs. Missed by countless code reviews and testers I have finally lost
    patience with the binary sysctl interface.

    The binary sysctl interface has been sort of deprecated for years and
    finding a user space program that uses the syscall is more difficult then
    finding a needle in a haystack. Problems continue to crop up, with the in
    kernel implementation. So since supporting something that no one uses is
    silly, deprecate sys_sysctl with a sufficient grace period and notice that
    the handful of user space applications that care can be fixed or replaced.

    The /proc/sys sysctl interface that people use will continue to be
    supported indefinitely.

    This patch moves the tested warning about sysctls from the path where
    sys_sysctl to a separate path called from both implementations of
    sys_sysctl, and it adds a proper entry into
    Documentation/feature-removal-schedule.

    Allowing us to revisit this in a couple years time and actually kill
    sys_sysctl.

    [lethal@linux-sh.org: sysctl: Fix syscall disabled build]
    Signed-off-by: Eric W. Biederman
    Signed-off-by: Paul Mundt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric W. Biederman
     
  • 25398a158   sysctl: parport remove binary paths ... Browse Code »

    The sysctl binary paths don't look as if they even code work, .data is not
    filled in, and all of the proc_handlers look at extra1 and there is not
    strategy routine.

    So just kill the binary paths.

    In addition this patch removes the setting of extra1 on directories. It
    doesn't look like the parport code ever examines it, and it's bad sysctl form.

    [bunk@kernel.org: remove parport_device_num()]
    Signed-off-by: Eric W. Biederman
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric W. Biederman
     
  • 8f4ce8c32   serial: turn serial console suspend a boot rather than compile time option ... Browse Code »

    Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop
    the serial console from being suspended when the rest of the machine goes
    to sleep. This is incredibly useful for debugging power management-related
    things; however, having it as a compile-time option has proved to be
    incredibly inconvenient for us (OLPC). There are plenty of times that we
    want serial console to not suspend, but for the most part we'd like serial
    console to be suspended.

    This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel
    boot parameter (no_console_suspend). By default, the serial console will
    be suspended along with the rest of the system; by passing
    'no_console_suspend' to the kernel during boot, serial console will remain
    alive during suspend.

    For now, this is pretty serial console specific; further fixes could be
    applied to make this work for things like netconsole.

    Signed-off-by: Andres Salomon
    Acked-by: "Rafael J. Wysocki"
    Acked-by: Pavel Machek
    Cc: Nigel Cunningham
    Cc: Russell King
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andres Salomon
     
  • d5d8c5976   freezer: do not send signals to kernel threads ... Browse Code »

    The freezer should not send signals to kernel threads, since that may lead to
    subtle problems. In particular, commit
    b74d0deb968e1f85942f17080eace015ce3c332c has changed recalc_sigpending_tsk()
    so that it doesn't clear TIF_SIGPENDING. For this reason, if the freezer
    continues to send fake signals to kernel threads and the freezing of kernel
    threads fails, some of them may be running with TIF_SIGPENDING set forever.

    Accordingly, recalc_sigpending_tsk() shouldn't set the task's TIF_SIGPENDING
    flag if TIF_FREEZE is set.

    Signed-off-by: Rafael J. Wysocki
    Cc: Nigel Cunningham
    Cc: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 277636537   freezer: document relationship with memory shrinking ... Browse Code »

    One important reason to freeze tasks, which is that we don't want them to
    allocate memory after freeing it for the hibernation image, has not been
    documented. Fix it.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Acked-by: Nigel Cunningham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     
  • 26398a70e   PM: Rename struct pm_ops and related things ... Browse Code »

    The name of 'struct pm_ops' suggests that it is related to the power
    management in general, but in fact it is only related to suspend.  Moreover,
    its name should indicate what this structure is used for, so it seems
    reasonable to change it to 'struct platform_suspend_ops'.  In that case, the
    name of the global variable of this type used by the PM core and the names of
    related functions should be changed accordingly.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Cc: Len Brown
    Cc: Greg KH
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

18 Oct, 2007

6 commits

  • 9d8190f87   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs ... Browse Code »

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
    9p: remove sysctl
    9p: fix bad kconfig cross-dependency
    9p: soften invalidation in loose_mode
    9p: attach-per-user
    9p: rename uid and gid parameters
    9p: define session flags
    9p: Make transports dynamic

    Linus Torvalds
     
  • ba17674fe   9p: attach-per-user ... Browse Code »

    The 9P2000 protocol requires the authentication and permission checks to be
    done in the file server. For that reason every user that accesses the file
    server tree has to authenticate and attach to the server separately.
    Multiple users can share the same connection to the server.

    Currently v9fs does a single attach and executes all I/O operations as a
    single user. This makes using v9fs in multiuser environment unsafe as it
    depends on the client doing the permission checking.

    This patch improves the 9P2000 support by allowing every user to attach
    separately. The patch defines three modes of access (new mount option
    'access'):

    - attach-per-user (access=user) (default mode for 9P2000.u)
    If a user tries to access a file served by v9fs for the first time, v9fs
    sends an attach command to the server (Tattach) specifying the user. If
    the attach succeeds, the user can access the v9fs tree.
    As there is no uname->uid (string->integer) mapping yet, this mode works
    only with the 9P2000.u dialect.

    - allow only one user to access the tree (access=)
    Only the user with uid can access the v9fs tree. Other users that attempt
    to access it will get EPERM error.

    - do all operations as a single user (access=any) (default for 9P2000)
    V9fs does a single attach and all operations are done as a single user.
    If this mode is selected, the v9fs behavior is identical with the current
    one.

    Signed-off-by: Latchesar Ionkov
    Signed-off-by: Eric Van Hensbergen

    Latchesar Ionkov
     
  • bd32b82df   9p: rename uid and gid parameters ... Browse Code »

    Change the names of 'uid' and 'gid' parameters to the more appropriate
    'dfltuid' and 'dfltgid'. This also sets the default uid/gid to -2
    (aka nfsnobody)

    Signed-off-by: Latchesar Ionkov
    Signed-off-by: Eric Van Hensbergen

    Latchesar Ionkov
     
  • a80d923e1   9p: Make transports dynamic ... Browse Code »

    This patch abstracts out the interfaces to underlying transports so that
    new transports can be added as modules. This should also allow kernel
    configuration of transports without ifdef-hell.

    Signed-off-by: Eric Van Hensbergen

    Eric Van Hensbergen
     
  • 38e760a13   x86: expand /proc/interrupts to include missing vectors, v2 ... Browse Code »

    Add missing IRQs and IRQ descriptions to /proc/interrupts.

    /proc/interrupts is most useful when it displays every IRQ vector in use by
    the system, not just those somebody thought would be interesting.

    This patch inserts the following vector displays to the i386 and x86_64
    platforms, as appropriate:

    rescheduling interrupts
    TLB flush interrupts
    function call interrupts
    thermal event interrupts
    threshold interrupts
    spurious interrupts

    A threshold interrupt occurs when ECC memory correction is occuring at too
    high a frequency. Thresholds are used by the ECC hardware as occasional
    ECC failures are part of normal operation, but long sequences of ECC
    failures usually indicate a memory chip that is about to fail.

    Thermal event interrupts occur when a temperature threshold has been
    exceeded for some CPU chip. IIRC, a thermal interrupt is also generated
    when the temperature drops back to a normal level.

    A spurious interrupt is an interrupt that was raised then lowered by the
    device before it could be fully processed by the APIC. Hence the apic sees
    the interrupt but does not know what device it came from. For this case
    the APIC hardware will assume a vector of 0xff.

    Rescheduling, call, and TLB flush interrupts are sent from one CPU to
    another per the needs of the OS. Typically, their statistics would be used
    to discover if an interrupt flood of the given type has been occuring.

    AK: merged v2 and v4 which had some more tweaks
    AK: replace Local interrupts with Local timer interrupts
    AK: Fixed description of interrupt types.

    [ tglx: arch/x86 adaptation ]
    [ mingo: small cleanup ]

    Signed-off-by: Joe Korty
    Signed-off-by: Andi Kleen
    Cc: Tim Hockin
    Cc: Andi Kleen
    Cc: Ingo Molnar
    Cc: "H. Peter Anvin"
    Signed-off-by: Andrew Morton
    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner

    Joe Korty
     
  • 909dd324f   x86: clean up mce= argument parsing slightly ... Browse Code »

    Move the = into the __setup line.
    Document the option in kernel-parameters.txt by adding a pointer
    to the x86-64 specific documentation.

    [ tglx: arch/x86 adaptation ]

    Pointed out by Robert Day
    Signed-off-by: Andi Kleen
    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner

    Andi Kleen
     

17 Oct, 2007

28 commits