projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 208d54e5 DH |
1 | #ifndef __LINUX_MEMORY_HOTPLUG_H |
| 2 | #define __LINUX_MEMORY_HOTPLUG_H | |
| 3 | ||
| 4 | #include <linux/mmzone.h> | |
| 5 | #include <linux/spinlock.h> | |
| 6 | ||
| 7 | #ifdef CONFIG_MEMORY_HOTPLUG | |
| 8 | /* | |
| 9 | * pgdat resizing functions | |
| 10 | */ | |
| 11 | static inline | |
| 12 | void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) | |
| 13 | { | |
| 14 | spin_lock_irqsave(&pgdat->node_size_lock, *flags); | |
| 15 | } | |
| 16 | static inline | |
| 17 | void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) | |
| 18 | { | |
| bdc8cb98 | 19 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
| 208d54e5 DH |
20 | } |
| 21 | static inline | |
| 22 | void pgdat_resize_init(struct pglist_data *pgdat) | |
| 23 | { | |
| 24 | spin_lock_init(&pgdat->node_size_lock); | |
| 25 | } | |
| bdc8cb98 DH |
26 | /* |
| 27 | * Zone resizing functions | |
| 28 | */ | |
| 29 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
| 30 | { | |
| 31 | return read_seqbegin(&zone->span_seqlock); | |
| 32 | } | |
| 33 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
| 34 | { | |
| 35 | return read_seqretry(&zone->span_seqlock, iv); | |
| 36 | } | |
| 37 | static inline void zone_span_writelock(struct zone *zone) | |
| 38 | { | |
| 39 | write_seqlock(&zone->span_seqlock); | |
| 40 | } | |
| 41 | static inline void zone_span_writeunlock(struct zone *zone) | |
| 42 | { | |
| 43 | write_sequnlock(&zone->span_seqlock); | |
| 44 | } | |
| 45 | static inline void zone_seqlock_init(struct zone *zone) | |
| 46 | { | |
| 47 | seqlock_init(&zone->span_seqlock); | |
| 48 | } | |
| 208d54e5 DH |
49 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
| 50 | /* | |
| 51 | * Stub functions for when hotplug is off | |
| 52 | */ | |
| 53 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} | |
| 54 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} | |
| 55 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} | |
| bdc8cb98 DH |
56 | |
| 57 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
| 58 | { | |
| 59 | return 0; | |
| 60 | } | |
| 61 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
| 62 | { | |
| 63 | return 0; | |
| 64 | } | |
| 65 | static inline void zone_span_writelock(struct zone *zone) {} | |
| 66 | static inline void zone_span_writeunlock(struct zone *zone) {} | |
| 67 | static inline void zone_seqlock_init(struct zone *zone) {} | |
| 68 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ | |
| 208d54e5 | 69 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |