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    Subject[PATCH 12/14] PM / UNICORE32: Use struct syscore_ops instead of sysdevs for PM
    Date
    From: Rafael J. Wysocki <rjw@sisk.pl>

    Make some UNICORE32 architecture's code use struct syscore_ops
    objects for power management instead of sysdev classes and sysdevs.

    This simplifies the code and reduces the kernel's memory footprint.
    It also is necessary for removing sysdevs from the kernel entirely in
    the future.

    Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
    ---
    arch/unicore32/kernel/irq.c | 23 ++++++++---------------
    1 file changed, 8 insertions(+), 15 deletions(-)

    Index: linux-2.6/arch/unicore32/kernel/irq.c
    ===================================================================
    --- linux-2.6.orig/arch/unicore32/kernel/irq.c
    +++ linux-2.6/arch/unicore32/kernel/irq.c
    @@ -23,7 +23,7 @@
    #include <linux/list.h>
    #include <linux/kallsyms.h>
    #include <linux/proc_fs.h>
    -#include <linux/sysdev.h>
    +#include <linux/syscore_ops.h>
    #include <linux/gpio.h>

    #include <asm/system.h>
    @@ -237,7 +237,7 @@ static struct puv3_irq_state {
    unsigned int iccr;
    } puv3_irq_state;

    -static int puv3_irq_suspend(struct sys_device *dev, pm_message_t state)
    +static int puv3_irq_suspend(void)
    {
    struct puv3_irq_state *st = &puv3_irq_state;

    @@ -265,7 +265,7 @@ static int puv3_irq_suspend(struct sys_d
    return 0;
    }

    -static int puv3_irq_resume(struct sys_device *dev)
    +static void puv3_irq_resume(void)
    {
    struct puv3_irq_state *st = &puv3_irq_state;

    @@ -278,27 +278,20 @@ static int puv3_irq_resume(struct sys_de

    writel(st->icmr, INTC_ICMR);
    }
    - return 0;
    }

    -static struct sysdev_class puv3_irq_sysclass = {
    - .name = "pkunity-irq",
    +static struct syscore_ops puv3_irq_syscore_ops = {
    .suspend = puv3_irq_suspend,
    .resume = puv3_irq_resume,
    };

    -static struct sys_device puv3_irq_device = {
    - .id = 0,
    - .cls = &puv3_irq_sysclass,
    -};
    -
    -static int __init puv3_irq_init_devicefs(void)
    +static int __init puv3_irq_init_syscore(void)
    {
    - sysdev_class_register(&puv3_irq_sysclass);
    - return sysdev_register(&puv3_irq_device);
    + register_syscore_ops(&puv3_irq_syscore_ops);
    + return 0;
    }

    -device_initcall(puv3_irq_init_devicefs);
    +device_initcall(puv3_irq_init_syscore);

    void __init init_IRQ(void)
    {


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