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| 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 /ipc/ipcns_notifier.c | |
| parent | 91cfb2b4b57816de0c96de417b3238249f0b125f (diff) | |
| download | linux-6546bc4279241e8fa432de1bb63a4f6f791fd669.tar.gz linux-6546bc4279241e8fa432de1bb63a4f6f791fd669.tar.bz2 linux-6546bc4279241e8fa432de1bb63a4f6f791fd669.zip | |
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 'ipc/ipcns_notifier.c')
| -rw-r--r-- | ipc/ipcns_notifier.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/ipc/ipcns_notifier.c b/ipc/ipcns_notifier.c index c7974609defc..70ff09183f7b 100644 --- a/ipc/ipcns_notifier.c +++ b/ipc/ipcns_notifier.c @@ -61,6 +61,15 @@ int register_ipcns_notifier(struct ipc_namespace *ns) return blocking_notifier_chain_register(&ipcns_chain, &ns->ipcns_nb); } +int cond_register_ipcns_notifier(struct ipc_namespace *ns) +{ + memset(&ns->ipcns_nb, 0, sizeof(ns->ipcns_nb)); + ns->ipcns_nb.notifier_call = ipcns_callback; + ns->ipcns_nb.priority = IPCNS_CALLBACK_PRI; + return blocking_notifier_chain_cond_register(&ipcns_chain, + &ns->ipcns_nb); +} + int unregister_ipcns_notifier(struct ipc_namespace *ns) { return blocking_notifier_chain_unregister(&ipcns_chain, |