[PATCH] hotplug CPU: clean up hotcpu_notifier() use

There was lots of #ifdef noise in the kernel due to hotcpu_notifier(fn,
prio) not correctly marking 'fn' as used in the !HOTPLUG_CPU case, and thus
generating compiler warnings of unused symbols, hence forcing people to add
#ifdefs.

the compiler can skip truly unused functions just fine:

    text    data     bss     dec     hex filename
 1624412  728710 3674856 6027978  5bfaca vmlinux.before
 1624412  728710 3674856 6027978  5bfaca vmlinux.after

[akpm@osdl.org: topology.c fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 0 insertions, 4 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 59d058a3b504..e660cb57e42a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3340,7 +3340,6 @@ void unregister_netdev(struct net_device *dev)
 
 EXPORT_SYMBOL(unregister_netdev);
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int dev_cpu_callback(struct notifier_block *nfb,
                             unsigned long action,
                             void *ocpu)
@@ -3384,7 +3383,6 @@ static int dev_cpu_callback(struct notifier_block *nfb,
 
         return NOTIFY_OK;
 }
-#endif /* CONFIG_HOTPLUG_CPU */
 
 #ifdef CONFIG_NET_DMA
 /**
diff --git a/net/core/flow.c b/net/core/flow.c
index 104c25d00a1d..d137f971f97d 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -340,7 +340,6 @@ static void __devinit flow_cache_cpu_prepare(int cpu)
         tasklet_init(tasklet, flow_cache_flush_tasklet, 0);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int flow_cache_cpu(struct notifier_block *nfb,
                           unsigned long action,
                           void *hcpu)
@@ -349,7 +348,6 @@ static int flow_cache_cpu(struct notifier_block *nfb,
                 __flow_cache_shrink((unsigned long)hcpu, 0);
         return NOTIFY_OK;
 }
-#endif /* CONFIG_HOTPLUG_CPU */
 
 static int __init flow_cache_init(void)
 {