diff options
| author | Nadia Derbey <Nadia.Derbey@bull.net> | 2008-04-29 01:00:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:13 -0700 |
| commit | 6546bc4279241e8fa432de1bb63a4f6f791fd669 (patch) | |
| tree | 308f5c1621b1019a44800622ffc468a372f09434 /include | |
| parent | 91cfb2b4b57816de0c96de417b3238249f0b125f (diff) | |
ipc: re-enable msgmni automatic recomputing msgmni if set to negative
The enhancement as asked for by Yasunori: if msgmni is set to a negative
value, register it back into the ipcns notifier chain.
A new interface has been added to the notification mechanism:
notifier_chain_cond_register() registers a notifier block only if not already
registered. With that new interface we avoid taking care of the states
changes in procfs.
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Mingming Cao <cmm@us.ibm.com>
Cc: Pierre Peiffer <pierre.peiffer@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ipc_namespace.h | 1 | ||||
| -rw-r--r-- | include/linux/notifier.h | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h index c3b1da9e5fe..ea6c18a8b0d 100644 --- a/include/linux/ipc_namespace.h +++ b/include/linux/ipc_namespace.h @@ -52,6 +52,7 @@ extern atomic_t nr_ipc_ns; #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, extern int register_ipcns_notifier(struct ipc_namespace *); +extern int cond_register_ipcns_notifier(struct ipc_namespace *); extern int unregister_ipcns_notifier(struct ipc_namespace *); extern int ipcns_notify(unsigned long); diff --git a/include/linux/notifier.h b/include/linux/notifier.h index 20dfed59018..0ff6224d172 100644 --- a/include/linux/notifier.h +++ b/include/linux/notifier.h @@ -121,6 +121,10 @@ extern int raw_notifier_chain_register(struct raw_notifier_head *nh, extern int srcu_notifier_chain_register(struct srcu_notifier_head *nh, struct notifier_block *nb); +extern int blocking_notifier_chain_cond_register( + struct blocking_notifier_head *nh, + struct notifier_block *nb); + extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh, struct notifier_block *nb); extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh, |