diff options
Diffstat (limited to 'include/linux/memory_hotplug.h')
| -rw-r--r-- | include/linux/memory_hotplug.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h new file mode 100644 index 000000000000..e8103be9d528 --- /dev/null +++ b/include/linux/memory_hotplug.h @@ -0,0 +1,34 @@ +#ifndef __LINUX_MEMORY_HOTPLUG_H +#define __LINUX_MEMORY_HOTPLUG_H + +#include <linux/mmzone.h> +#include <linux/spinlock.h> + +#ifdef CONFIG_MEMORY_HOTPLUG +/* + * pgdat resizing functions + */ +static inline +void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) +{ + spin_lock_irqsave(&pgdat->node_size_lock, *flags); +} +static inline +void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) +{ + spin_lock_irqrestore(&pgdat->node_size_lock, *flags); +} +static inline +void pgdat_resize_init(struct pglist_data *pgdat) +{ + spin_lock_init(&pgdat->node_size_lock); +} +#else /* ! CONFIG_MEMORY_HOTPLUG */ +/* + * Stub functions for when hotplug is off + */ +static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} +static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} +static inline void pgdat_resize_init(struct pglist_data *pgdat) {} +#endif +#endif /* __LINUX_MEMORY_HOTPLUG_H */ |