lkml.org 
[lkml]   [2016]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 01/21] arm64: FP/SIMD: Convert to hotplug state machine
    Date
    Install the callbacks via the state machine.

    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: linux-arm-kernel@lists.infradead.org
    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    ---
    arch/arm64/kernel/fpsimd.c | 22 +++++-----------------
    include/linux/cpuhotplug.h | 1 +
    2 files changed, 6 insertions(+), 17 deletions(-)

    diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
    index 975b274ee7b5..394c61db5566 100644
    --- a/arch/arm64/kernel/fpsimd.c
    +++ b/arch/arm64/kernel/fpsimd.c
    @@ -299,28 +299,16 @@ static inline void fpsimd_pm_init(void) { }
    #endif /* CONFIG_CPU_PM */

    #ifdef CONFIG_HOTPLUG_CPU
    -static int fpsimd_cpu_hotplug_notifier(struct notifier_block *nfb,
    - unsigned long action,
    - void *hcpu)
    +static int fpsimd_cpu_dead(unsigned int cpu)
    {
    - unsigned int cpu = (long)hcpu;
    -
    - switch (action) {
    - case CPU_DEAD:
    - case CPU_DEAD_FROZEN:
    - per_cpu(fpsimd_last_state, cpu) = NULL;
    - break;
    - }
    - return NOTIFY_OK;
    + per_cpu(fpsimd_last_state, cpu) = NULL;
    + return 0;
    }

    -static struct notifier_block fpsimd_cpu_hotplug_notifier_block = {
    - .notifier_call = fpsimd_cpu_hotplug_notifier,
    -};
    -
    static inline void fpsimd_hotplug_init(void)
    {
    - register_cpu_notifier(&fpsimd_cpu_hotplug_notifier_block);
    + cpuhp_setup_state_nocalls(CPUHP_ARM64_FPSIMD_DEAD, "arm64/fpsimd:dead",
    + NULL, fpsimd_cpu_dead);
    }

    #else
    diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
    index afd59e2ca4b3..0da071ff36d2 100644
    --- a/include/linux/cpuhotplug.h
    +++ b/include/linux/cpuhotplug.h
    @@ -20,6 +20,7 @@ enum cpuhp_state {
    CPUHP_SOFTIRQ_DEAD,
    CPUHP_NET_MVNETA_DEAD,
    CPUHP_CPUIDLE_DEAD,
    + CPUHP_ARM64_FPSIMD_DEAD,
    CPUHP_WORKQUEUE_PREP,
    CPUHP_POWER_NUMA_PREPARE,
    CPUHP_HRTIMERS_PREPARE,
    --
    2.9.3
    \
     
     \ /
      Last update: 2016-09-17 09:58    [W:4.936 / U:2.596 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site