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    SubjectRe: [PATCH 1/13] BC: atomic_dec_and_lock_irqsave() helper
    Hello Kirill, Hello Pavel,

    Kirill Korotaev wrote:
    > Oleg Nesterov noticed to me that the construction like
    > (used in beancounter patches and free_uid()):
    >
    > local_irq_save(flags);
    > if (atomic_dec_and_lock(&refcnt, &lock))
    > ...
    >
    > is not that good for preemtible kernels, since with preemption
    > spin_lock() can schedule() to reduce latency. However, it won't schedule
    > if interrupts are disabled.
    >
    > So this patch introduces atomic_dec_and_lock_irqsave() as a logical
    > counterpart to atomic_dec_and_lock().

    You should probably send that one independently from the BC
    patchset.

    C.
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