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    SubjectRe: [RFC PATCH v1 19/25] printk: introduce emergency messages
    On (03/08/19 11:31), Petr Mladek wrote:
    > Great catch!
    >
    > I think that it is doable to guard the list using RCU.

    I think console_sem is more than just list lock.

    E.g. fb_flashcursor() - console_sem protects framebuffer from concurrent
    modifications. And many other examples.

    I think the last time we talked about it (two+ years ago) we counted
    5 or 7 (don't remember exactly) different things which console_sem
    does.

    -ss

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