[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>

4 files changed, 0 insertions, 8 deletions

diff --git a/arch/i386/kernel/cpu/mcheck/therm_throt.c b/arch/i386/kernel/cpu/mcheck/therm_throt.c
index bad8b4420709..065005c3f168 100644
--- a/arch/i386/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/i386/kernel/cpu/mcheck/therm_throt.c
@@ -116,7 +116,6 @@ static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev)
         return sysfs_create_group(&sys_dev->kobj, &thermal_throttle_attr_group);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static __cpuinit void thermal_throttle_remove_dev(struct sys_device *sys_dev)
 {
         return sysfs_remove_group(&sys_dev->kobj, &thermal_throttle_attr_group);
@@ -153,7 +152,6 @@ static struct notifier_block thermal_throttle_cpu_notifier =
 {
         .notifier_call = thermal_throttle_cpu_callback,
 };
-#endif /* CONFIG_HOTPLUG_CPU */
 
 static __init int thermal_throttle_init_device(void)
 {
diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
index ab0c327e79dc..23b2cc748d4e 100644
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -167,7 +167,6 @@ static int cpuid_device_create(int i)
         return err;
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int cpuid_class_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
 {
         unsigned int cpu = (unsigned long)hcpu;
@@ -187,7 +186,6 @@ static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier =
 {
         .notifier_call = cpuid_class_cpu_callback,
 };
-#endif /* !CONFIG_HOTPLUG_CPU */
 
 static int __init cpuid_init(void)
 {
diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c
index 23f5984d0654..972346604f9d 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -703,7 +703,6 @@ static struct sysdev_driver mc_sysdev_driver = {
         .resume = mc_sysdev_resume,
 };
 
-#ifdef CONFIG_HOTPLUG_CPU
 static __cpuinit int
 mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
 {
@@ -726,7 +725,6 @@ mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
 static struct notifier_block mc_cpu_notifier = {
         .notifier_call = mc_cpu_callback,
 };
-#endif
 
 static int __init microcode_init (void)
 {
diff --git a/arch/i386/kernel/msr.c b/arch/i386/kernel/msr.c
index a773f776c9ea..7763c67ca282 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -250,7 +250,6 @@ static int msr_device_create(int i)
         return err;
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int msr_class_cpu_callback(struct notifier_block *nfb,
                                 unsigned long action, void *hcpu)
 {
@@ -271,7 +270,6 @@ static struct notifier_block __cpuinitdata msr_class_cpu_notifier =
 {
         .notifier_call = msr_class_cpu_callback,
 };
-#endif
 
 static int __init msr_init(void)
 {