• Martin Schwidefsky's avatar
    clocksource: Cleanup clocksource selection · f1b82746
    Martin Schwidefsky authored
    If a non high-resolution clocksource is first set as override clock
    and then registered it becomes active even if the system is in one-shot
    mode. Move the override check from sysfs_override_clocksource to the
    clocksource selection. That fixes the bug and simplifies the code. The
    check in clocksource_register for double registration of the same
    clocksource is removed without replacement.
    
    To find the initial clocksource a new weak function in jiffies.c is
    defined that returns the jiffies clocksource. The architecture code
    can then override the weak function with a more suitable clocksource,
    e.g. the TOD clock on s390.
    
    [ tglx: Folded in a fix from John Stultz ]
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    Acked-by: default avatarJohn Stultz <johnstul@us.ibm.com>
    Cc: Daniel Walker <dwalker@fifo99.com>
    LKML-Reference: <20090814134808.388024160@de.ibm.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    f1b82746
clocksource.c 15.8 KB