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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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