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    Subject[PATCH] LKCD for 2.5.44 (2/8): dump notifier
    Dump notification additions, similar to panic lists, but for dump
    specific modules (per design).

    sys.c | 36 ++++++++++++++++++++++++++++++++++++
    1 files changed, 36 insertions(+)

    diff -Naur linux-2.5.44.orig/kernel/sys.c linux-2.5.44.lkcd/kernel/sys.c
    --- linux-2.5.44.orig/kernel/sys.c Fri Oct 18 21:01:11 2002
    +++ linux-2.5.44.lkcd/kernel/sys.c Sat Oct 19 12:39:15 2002
    @@ -19,6 +19,7 @@
    #include <linux/workqueue.h>
    #include <linux/device.h>
    #include <linux/times.h>
    +#include <linux/dump.h>
    #include <linux/security.h>
    #include <linux/dcookies.h>

    @@ -77,6 +78,7 @@
    */

    static struct notifier_block *reboot_notifier_list;
    +struct notifier_block *dump_notifier_list;
    rwlock_t notifier_lock = RW_LOCK_UNLOCKED;

    /**
    @@ -195,6 +197,37 @@
    return notifier_chain_unregister(&reboot_notifier_list, nb);
    }

    +/**
    + * register_dump_notifier - Register function to be called at dump time
    + * @nb: Info about notifier function to be called
    + *
    + * Registers a function with the list of functions
    + * to be called at dump time.
    + *
    + * Currently always returns zero, as notifier_chain_register
    + * always returns zero.
    + */
    +
    +int register_dump_notifier(struct notifier_block * nb)
    +{
    + return notifier_chain_register(&dump_notifier_list, nb);
    +}
    +
    +/**
    + * unregister_dump_notifier - Unregister previously registered dump notifier
    + * @nb: Hook to be unregistered
    + *
    + * Unregisters a previously registered dump
    + * notifier function.
    + *
    + * Returns zero on success, or %-ENOENT on failure.
    + */
    +
    +int unregister_dump_notifier(struct notifier_block * nb)
    +{
    + return notifier_chain_unregister(&dump_notifier_list, nb);
    +}
    +
    asmlinkage long sys_ni_syscall(void)
    {
    return -ENOSYS;
    @@ -1384,3 +1417,6 @@
    EXPORT_SYMBOL(unregister_reboot_notifier);
    EXPORT_SYMBOL(in_group_p);
    EXPORT_SYMBOL(in_egroup_p);
    +EXPORT_SYMBOL(register_dump_notifier);
    +EXPORT_SYMBOL(unregister_dump_notifier);
    +EXPORT_SYMBOL(dump_notifier_list);
    -
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