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    SubjectRe: Purpose of [start|end]_bh_atomic?

    On Mon, 15 Feb 1999, Regis Duchesne wrote:

    > What is the exact purpose of start_bh_atomic() and end_bh_atomic()?
    > Reading the source, I can see that some drivers use these functions, but I
    > can't see how it is related to bottom half handlers.

    <PRE>
    start_bh_atomic();
    <CODE>
    end_bh_atomic();
    <POST>

    they guarantee that no BH on any CPU will execute during the execution of
    the <CODE> critical section. bhs may run during <PRE> and <POST>. Note
    that this locks out _all_ bhs. It's main uses are in the networking code.

    -- mingo




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