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    Subject[PATCH v2 0/5] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup
    Date
    Hi folks,

    Thanks to suggestions from Mike, Frederic and Marco I ended up with
    something that looks somewhat sane and with a minimal amount of crud.

    Patches
    =======

    o Patch 1 is the meat of the topic and could be picked on its own if the
    rest is too icky.
    o Patch 2 introduces helpers for the dynamic preempt state
    o Patches 3-5 make use of said accessors where relevant.

    Testing
    =======

    Briefly tested the dynamic part on an x86 kernel + QEMU. x86_64_defconfig
    gets me:

    Dynamic Preempt: voluntary

    and appending preempt=full gets me:

    Dynamic Preempt: full

    Revisions
    =========

    v1: http://lore.kernel.org/r/20211105104035.3112162-1-valentin.schneider@arm.com
    v1.5: http://lore.kernel.org/r/20211109151057.3489223-1-valentin.schneider@arm.com

    This v2 is completely different from v1, so I felt like I could get away
    without writing a version changelog...

    Cheers,
    Valentin

    Valentin Schneider (5):
    preempt: Restore preemption model selection configs
    preempt/dynamic: Introduce preempt mode accessors
    powerpc: Use preemption model accessors
    kscan: Use preemption model accessors
    ftrace: Use preemption model accessors for trace header printout

    arch/powerpc/kernel/interrupt.c | 2 +-
    arch/powerpc/kernel/traps.c | 2 +-
    include/linux/kernel.h | 2 +-
    include/linux/sched.h | 16 +++++++++++++
    include/linux/vermagic.h | 2 +-
    init/Makefile | 2 +-
    kernel/Kconfig.preempt | 42 ++++++++++++++++-----------------
    kernel/kcsan/kcsan_test.c | 4 ++--
    kernel/sched/core.c | 17 ++++++++++---
    kernel/trace/trace.c | 14 ++++-------
    10 files changed, 62 insertions(+), 41 deletions(-)

    --
    2.25.1

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