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    Subject[PATCH 08/10] -mm: clocksource: initialize list value
    A change to clocksource initialization. It's optional for new clocksources,
    but prefered. If the list field is initialized it allows clocksource_register
    to complete faster since it doesn't have the scan the list of clocks doing
    strcmp on each.

    Signed-Off-By: Daniel Walker <dwalker@mvista.com>

    ---
    arch/i386/kernel/hpet.c | 1 +
    arch/i386/kernel/i8253.c | 1 +
    arch/i386/kernel/tsc.c | 1 +
    drivers/clocksource/acpi_pm.c | 1 +
    drivers/clocksource/cyclone.c | 1 +
    drivers/clocksource/scx200_hrt.c | 1 +
    include/linux/clocksource.h | 3 +++
    7 files changed, 9 insertions(+)

    Index: linux-2.6.18/arch/i386/kernel/hpet.c
    ===================================================================
    --- linux-2.6.18.orig/arch/i386/kernel/hpet.c
    +++ linux-2.6.18/arch/i386/kernel/hpet.c
    @@ -27,6 +27,7 @@ static struct clocksource clocksource_hp
    .mult = 0, /* set below */
    .shift = HPET_SHIFT,
    .is_continuous = 1,
    + .list = CLOCKSOURCE_LIST_INIT(clocksource_hpet.list),
    };

    static int __init init_hpet_clocksource(void)
    Index: linux-2.6.18/arch/i386/kernel/i8253.c
    ===================================================================
    --- linux-2.6.18.orig/arch/i386/kernel/i8253.c
    +++ linux-2.6.18/arch/i386/kernel/i8253.c
    @@ -105,6 +105,7 @@ static struct clocksource clocksource_pi
    .mask = CLOCKSOURCE_MASK(32),
    .mult = 0,
    .shift = 20,
    + .list = CLOCKSOURCE_LIST_INIT(clocksource_pit.list),
    };

    static int __init init_pit_clocksource(void)
    Index: linux-2.6.18/arch/i386/kernel/tsc.c
    ===================================================================
    --- linux-2.6.18.orig/arch/i386/kernel/tsc.c
    +++ linux-2.6.18/arch/i386/kernel/tsc.c
    @@ -350,6 +350,7 @@ static struct clocksource clocksource_ts
    .mult = 0, /* to be set */
    .shift = 22,
    .is_continuous = 1,
    + .list = CLOCKSOURCE_LIST_INIT(clocksource_tsc.list),
    };


    Index: linux-2.6.18/drivers/clocksource/acpi_pm.c
    ===================================================================
    --- linux-2.6.18.orig/drivers/clocksource/acpi_pm.c
    +++ linux-2.6.18/drivers/clocksource/acpi_pm.c
    @@ -73,6 +73,7 @@ static struct clocksource clocksource_ac
    .mult = 0, /*to be caluclated*/
    .shift = 22,
    .is_continuous = 1,
    + .list = CLOCKSOURCE_LIST_INIT(clocksource_acpi_pm.list),
    };


    Index: linux-2.6.18/drivers/clocksource/cyclone.c
    ===================================================================
    --- linux-2.6.18.orig/drivers/clocksource/cyclone.c
    +++ linux-2.6.18/drivers/clocksource/cyclone.c
    @@ -32,6 +32,7 @@ static struct clocksource clocksource_cy
    .mult = 10,
    .shift = 0,
    .is_continuous = 1,
    + .list = CLOCKSOURCE_LIST_INIT(clocksource_cyclone.list),
    };

    static int __init init_cyclone_clocksource(void)
    Index: linux-2.6.18/drivers/clocksource/scx200_hrt.c
    ===================================================================
    --- linux-2.6.18.orig/drivers/clocksource/scx200_hrt.c
    +++ linux-2.6.18/drivers/clocksource/scx200_hrt.c
    @@ -58,6 +58,7 @@ static struct clocksource cs_hrt = {
    .read = read_hrt,
    .mask = CLOCKSOURCE_MASK(32),
    .is_continuous = 1,
    + .list = CLOCKSOURCE_LIST_INIT(cs_hrt.list),
    /* mult, shift are set based on mhz27 flag */
    };

    Index: linux-2.6.18/include/linux/clocksource.h
    ===================================================================
    --- linux-2.6.18.orig/include/linux/clocksource.h
    +++ linux-2.6.18/include/linux/clocksource.h
    @@ -82,6 +82,9 @@ struct clocksource {
    /* simplify initialization of mask field */
    #define CLOCKSOURCE_MASK(bits) (cycle_t)(bits<64 ? ((1ULL<<bits)-1) : -1)

    +/* Abstracted list initialization */
    +#define CLOCKSOURCE_LIST_INIT(x) LIST_HEAD_INIT(x)
    +
    /**
    * clocksource_khz2mult - calculates mult from khz and shift
    * @khz: Clocksource frequency in KHz
    --

    -
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