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ipc/util.c: use register_hotmemory_notifier()

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Squishes a statement-with-no-effect warning, removes some ifdefs and
shrinks .text by one byte!

Note that this code fails to check for blocking_notifier_chain_register()
failures.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2013-04-29 15:08:05 -07:00 committed by Linus Torvalds
parent f02c696800
commit 8f68fa2d19
1 changed files with 8 additions and 7 deletions
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15
ipc/util.c
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@ -23,6 +23,7 @@
#include <linux/msg.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/notifier.h>
#include <linux/capability.h>
#include <linux/highuid.h>
#include <linux/security.h>
@ -47,19 +48,16 @@ struct ipc_proc_iface {
int (*show)(struct seq_file *, void *);
};
#ifdef CONFIG_MEMORY_HOTPLUG
static void ipc_memory_notifier(struct work_struct *work)
{
ipcns_notify(IPCNS_MEMCHANGED);
}
static DECLARE_WORK(ipc_memory_wq, ipc_memory_notifier);
static int ipc_memory_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
static DECLARE_WORK(ipc_memory_wq, ipc_memory_notifier);
switch (action) {
case MEM_ONLINE: /* memory successfully brought online */
case MEM_OFFLINE: /* or offline: it's time to recompute msgmni */
@ -85,7 +83,10 @@ static int ipc_memory_callback(struct notifier_block *self,
return NOTIFY_OK;
}
#endif /* CONFIG_MEMORY_HOTPLUG */
static struct notifier_block ipc_memory_nb = {
.notifier_call = ipc_memory_callback,
.priority = IPC_CALLBACK_PRI,
};
/**
* ipc_init - initialise IPC subsystem
@ -102,7 +103,7 @@ static int __init ipc_init(void)
sem_init();
msg_init();
shm_init();
hotplug_memory_notifier(ipc_memory_callback, IPC_CALLBACK_PRI);
register_hotmemory_notifier(&ipc_memory_nb);
register_ipcns_notifier(&init_ipc_ns);
return 0;
}