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    SubjectRe: patch: delay_50ms() in ide-probe.c in 2.2.14


    Thanks for the instructive response here on jiffies.

    But where is the code that actually increments jiffies?
    Where is the timer interrupt code?


    Thanks,

    ari



    > > How does jiffies change?
    >
    > It is modified from the timer interrupt. It is also marked "volatile".
    > This means that the compiler is NOT allowed to move the "move jiffies
    > into a register" outside the while loop.


    >
    > And the timer interrupt will increment jiffies 100 times
    > a second, until the thing times out.
    >
    > Roger.




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