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    SubjectRe: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable with irqs enabled
    On Thu, 23 Apr 2009 11:15:56 -0700
    David Brownell <> wrote:

    > On Thursday 23 April 2009, Alessandro Zummo wrote:
    > >  Is not an API change, we are gradually relaxing it if it
    > >  proves workable :)
    > Erm, it *is* an API change at least to the extent that
    > the last version of the patch made the interface spec
    > become incorrect.

    I know, I was just playing it down :)

    > Current interface spec *requires* that function to be
    > called with IRQs disabled.
    > The downside of that spec is that there's no way to test
    > it, since CONFIG_LOCKDEP doesn't understand that almost
    > all IRQ handlers don't disable IRQs. So there are some
    > bugs in RTC drivers that can only be uncovered by code
    > review.

    That's was what I was proposing. I'll give a code review
    but will not be able to test every driver so I'll need
    help from the authors.

    But first I need someone to validate the theory that
    says that we don't really need the IRQs to be disabled,
    as I stated in the email to Andrew.

    do you agree? :)


    Best regards,

    Alessandro Zummo,
    Tower Technologies - Torino, Italy

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