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| author | Chandra Seetharaman <sekharan@us.ibm.com> | 2006-06-27 02:54:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:41 -0700 |
| commit | 65edc68c345cbe21d0b0375c3452a3ed5e322868 (patch) | |
| tree | 07961d63cdacf95355a8db471c6ff4e321ca94fd /include/linux/cpu.h | |
| parent | 054cc8a2d808822dadf488a61729e3e550f114c4 (diff) | |
| download | lwn-65edc68c345cbe21d0b0375c3452a3ed5e322868.tar.gz lwn-65edc68c345cbe21d0b0375c3452a3ed5e322868.zip | |
[PATCH] cpu hotplug: make [un]register_cpu_notifier init time only
CPUs come online only at init time (unless CONFIG_HOTPLUG_CPU is defined).
So, cpu_notifier functionality need to be available only at init time.
This patch makes register_cpu_notifier() available only at init time, unless
CONFIG_HOTPLUG_CPU is defined.
This patch exports register_cpu_notifier() and unregister_cpu_notifier() only
if CONFIG_HOTPLUG_CPU is defined.
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/cpu.h')
| -rw-r--r-- | include/linux/cpu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index b23bf1c8addc..cdfe471a70a1 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -41,7 +41,13 @@ struct notifier_block; #ifdef CONFIG_SMP /* Need to know about CPUs going up/down? */ extern int register_cpu_notifier(struct notifier_block *nb); +#ifdef CONFIG_HOTPLUG_CPU extern void unregister_cpu_notifier(struct notifier_block *nb); +#else +static inline void unregister_cpu_notifier(struct notifier_block *nb) +{ +} +#endif extern int current_in_cpu_hotplug(void); int cpu_up(unsigned int cpu); |