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i8253: Convert i8253_lock to raw_spinlock
i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can not be converted to a sleeping lock. Convert it to raw_spinlock and fix up all users. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Ralf Baechle <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Acked-by: Takashi Iwai <[email protected]> Cc: Jens Axboe <[email protected]> LKML-Reference: <[email protected]>
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