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ipcns: make free_ipc_ns() static

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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2009-06-17 16:27:56 -07:00 committed by Linus Torvalds
parent 90af90d7d3
commit b4188def44
2 changed files with 24 additions and 25 deletions
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1
include/linux/ipc_namespace.h
View File

@ -94,7 +94,6 @@ static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; }
#endif #endif
#if defined(CONFIG_IPC_NS) #if defined(CONFIG_IPC_NS)
extern void free_ipc_ns(struct ipc_namespace *ns);
extern struct ipc_namespace *copy_ipcs(unsigned long flags, extern struct ipc_namespace *copy_ipcs(unsigned long flags,
struct ipc_namespace *ns); struct ipc_namespace *ns);
extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,

48
ipc/namespace.c
View File

@ -83,6 +83,30 @@ void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
up_write(&ids->rw_mutex); up_write(&ids->rw_mutex);
} }
static void free_ipc_ns(struct ipc_namespace *ns)
{
/*
* Unregistering the hotplug notifier at the beginning guarantees
* that the ipc namespace won't be freed while we are inside the
* callback routine. Since the blocking_notifier_chain_XXX routines
* hold a rw lock on the notifier list, unregister_ipcns_notifier()
* won't take the rw lock before blocking_notifier_call_chain() has
* released the rd lock.
*/
unregister_ipcns_notifier(ns);
sem_exit_ns(ns);
msg_exit_ns(ns);
shm_exit_ns(ns);
kfree(ns);
atomic_dec(&nr_ipc_ns);
/*
* Do the ipcns removal notification after decrementing nr_ipc_ns in
* order to have a correct value when recomputing msgmni.
*/
ipcns_notify(IPCNS_REMOVED);
}
/* /*
* put_ipc_ns - drop a reference to an ipc namespace. * put_ipc_ns - drop a reference to an ipc namespace.
* @ns: the namespace to put * @ns: the namespace to put
@ -108,27 +132,3 @@ void put_ipc_ns(struct ipc_namespace *ns)
free_ipc_ns(ns); free_ipc_ns(ns);
} }
} }
void free_ipc_ns(struct ipc_namespace *ns)
{
/*
* Unregistering the hotplug notifier at the beginning guarantees
* that the ipc namespace won't be freed while we are inside the
* callback routine. Since the blocking_notifier_chain_XXX routines
* hold a rw lock on the notifier list, unregister_ipcns_notifier()
* won't take the rw lock before blocking_notifier_call_chain() has
* released the rd lock.
*/
unregister_ipcns_notifier(ns);
sem_exit_ns(ns);
msg_exit_ns(ns);
shm_exit_ns(ns);
kfree(ns);
atomic_dec(&nr_ipc_ns);
/*
* Do the ipcns removal notification after decrementing nr_ipc_ns in
* order to have a correct value when recomputing msgmni.
*/
ipcns_notify(IPCNS_REMOVED);
}