[lkml]   [2006]   [Apr]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Linux 2.6.17-rc2 - notifier chain problem?
    Chandra Seetharaman <> wrote:
    > Thanks for the steps. With that i was able to reproduce the problem and
    > i found the bug.
    > While i go ahead and generate the patch, i wanted to hear if my
    > conclusion is correct.
    > The problem is due to the fact that most notifier registrations
    > incorrectly use __devinitdata to define the callback structure, as in:
    > static struct notifier_block __devinitdata hrtimers_nb = {
    > .notifier_call = hrtimer_cpu_notify,
    > };
    > devinitdata'd data is not _expected to be available_ after the
    > initialization(unless CONFIG_HOTPLUG is defined).
    > I do not know how it was working until now :), anybody has a theory that
    > can explain it (or my conclusion is wrong) ?

    That sounds right. There are several __devinitdata notifier_blocks in the
    tree - please be sure to check them all.

    btw, it'd be pretty trivial to add runtime checking for this sort of thing:

    int addr_in_init_section(void *addr)
    return addr >= __init_begin && addr < __init_end;

    (need to add __init_end to

    then we could use that to check various things in various places...
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2006-04-25 00:03    [W:0.046 / U:2.536 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site