The patch titled
Allow raw_notifier callouts to unregister themselves
has been added to the -mm tree. Its filename is
allow-raw_notifier-callouts-to-unregister-themselves.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Since raw_notifier chains don't benefit from any centralized locking
protections, they shouldn't suffer from the associated limitations. Under
some circumstances it might make sense for a raw_notifier callout routine
to unregister itself from the notifier chain. This patch (as678) changes
the notifier core to allow for such things.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sys.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff -puN kernel/sys.c~allow-raw_notifier-callouts-to-unregister-themselves kernel/sys.c
--- 25/kernel/sys.c~allow-raw_notifier-callouts-to-unregister-themselves Thu May 11 11:25:16 2006
+++ 25-akpm/kernel/sys.c Thu May 11 11:25:16 2006
@@ -132,14 +132,15 @@ static int __kprobes notifier_call_chain
unsigned long val, void *v)
{
int ret = NOTIFY_DONE;
- struct notifier_block *nb;
+ struct notifier_block *nb, *next_nb;
nb = rcu_dereference(*nl);
while (nb) {
+ next_nb = rcu_dereference(nb->next);
ret = nb->notifier_call(nb, val, v);
if ((ret & NOTIFY_STOP_MASK) == NOTIFY_STOP_MASK)
break;
- nb = rcu_dereference(nb->next);
+ nb = next_nb;
}
return ret;
}
_
Patches currently in -mm which might be from stern@xxxxxxxxxxxxxxxxxxx are
origin.patch
e100-disable-interrupts-at-boot.patch
allow-raw_notifier-callouts-to-unregister-themselves.patch
-
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