From 672ab41e9381b6418cbdf17b39b51ffd64d07792 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Thu, 22 Jan 2004 19:00:26 -0800 Subject: [PATCH] Fix CPU hotplug in networking The code directly accessed the "cpucontrol" semaphore used for CPU hotplug. That doesn't work all that well, since the semaphore doesn't even exist on UP. --- include/linux/cpu.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include') diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 2f374d79f157..02579ec6b99c 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -37,7 +37,12 @@ extern int register_cpu_notifier(struct notifier_block *nb); extern void unregister_cpu_notifier(struct notifier_block *nb); int cpu_up(unsigned int cpu); + +#define lock_cpu_hotplug() down(&cpucontrol) +#define unlock_cpu_hotplug() up(&cpucontrol) + #else + static inline int register_cpu_notifier(struct notifier_block *nb) { return 0; @@ -45,6 +50,10 @@ static inline int register_cpu_notifier(struct notifier_block *nb) static inline void unregister_cpu_notifier(struct notifier_block *nb) { } + +#define lock_cpu_hotplug() do { } while (0) +#define unlock_cpu_hotplug() do { } while (0) + #endif /* CONFIG_SMP */ extern struct sysdev_class cpu_sysdev_class; -- cgit v1.2.3