Eric Lee / smarc-fsl-linux-kernel

16 Oct, 2016

1 commit

  • 9ffc66941   Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux ... Browse Code »

    Pull gcc plugins update from Kees Cook:
    "This adds a new gcc plugin named "latent_entropy". It is designed to
    extract as much possible uncertainty from a running system at boot
    time as possible, hoping to capitalize on any possible variation in
    CPU operation (due to runtime data differences, hardware differences,
    SMP ordering, thermal timing variation, cache behavior, etc).

    At the very least, this plugin is a much more comprehensive example
    for how to manipulate kernel code using the gcc plugin internals"

    * tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
    latent_entropy: Mark functions with __latent_entropy
    gcc-plugins: Add latent_entropy plugin

    Linus Torvalds
     

11 Oct, 2016

1 commit

  • 0766f788e   latent_entropy: Mark functions with __latent_entropy ... Browse Code »

    The __latent_entropy gcc attribute can be used only on functions and
    variables. If it is on a function then the plugin will instrument it for
    gathering control-flow entropy. If the attribute is on a variable then
    the plugin will initialize it with random contents. The variable must
    be an integer, an integer array type or a structure with integer fields.

    These specific functions have been selected because they are init
    functions (to help gather boot-time entropy), are called at unpredictable
    times, or they have variable loops, each of which provide some level of
    latent entropy.

    Signed-off-by: Emese Revfy
    [kees: expanded commit message]
    Signed-off-by: Kees Cook

    Emese Revfy
     

20 Sep, 2016

1 commit

20 Jan, 2016

1 commit

  • 2ee177e94   irq_poll: Fix irq_poll_sched() ... Browse Code »

    The IRQ_POLL_F_SCHED bit is set as long as polling is ongoing.
    This means that irq_poll_sched() must proceed if this bit has
    not yet been set.

    Fixes: commit ea51190c0315 ("irq_poll: fold irq_poll_sched_prep into irq_poll_sched").
    Signed-off-by: Bart Van Assche
    Reviewed-by: Christoph Hellwig
    Reviewed-by: Sagi Grimberg
    Signed-off-by: Doug Ledford

    Bart Van Assche
     

12 Dec, 2015

5 commits