Merge git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[linux-2.6] / include / linux / memory_hotplug.h

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index e8103be9d5280a5f434acb687d8f9ded32473150..01f03bc06effcefafe9f2a2ea36834f3c345d256 100644 (file)
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -3,6 +3,8 @@
 
 #include <linux/mmzone.h>
 #include <linux/spinlock.h>
+#include <linux/mmzone.h>
+#include <linux/notifier.h>
 
 #ifdef CONFIG_MEMORY_HOTPLUG
 /*
@@ -16,13 +18,49 @@ void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
 static inline
 void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
 {
-       spin_lock_irqrestore(&pgdat->node_size_lock, *flags);
+       spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
 }
 static inline
 void pgdat_resize_init(struct pglist_data *pgdat)
 {
        spin_lock_init(&pgdat->node_size_lock);
 }
+/*
+ * Zone resizing functions
+ */
+static inline unsigned zone_span_seqbegin(struct zone *zone)
+{
+       return read_seqbegin(&zone->span_seqlock);
+}
+static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
+{
+       return read_seqretry(&zone->span_seqlock, iv);
+}
+static inline void zone_span_writelock(struct zone *zone)
+{
+       write_seqlock(&zone->span_seqlock);
+}
+static inline void zone_span_writeunlock(struct zone *zone)
+{
+       write_sequnlock(&zone->span_seqlock);
+}
+static inline void zone_seqlock_init(struct zone *zone)
+{
+       seqlock_init(&zone->span_seqlock);
+}
+extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
+extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
+extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
+/* need some defines for these for archs that don't support it */
+extern void online_page(struct page *page);
+/* VM interface that may be used by firmware interface */
+extern int add_memory(u64 start, u64 size);
+extern int remove_memory(u64 start, u64 size);
+extern int online_pages(unsigned long, unsigned long);
+
+/* reasonably generic interface to expand the physical pages in a zone  */
+extern int __add_pages(struct zone *zone, unsigned long start_pfn,
+       unsigned long nr_pages);
 #else /* ! CONFIG_MEMORY_HOTPLUG */
 /*
  * Stub functions for when hotplug is off
@@ -30,5 +68,37 @@ void pgdat_resize_init(struct pglist_data *pgdat)
 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
+
+static inline unsigned zone_span_seqbegin(struct zone *zone)
+{
+       return 0;
+}
+static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
+{
+       return 0;
+}
+static inline void zone_span_writelock(struct zone *zone) {}
+static inline void zone_span_writeunlock(struct zone *zone) {}
+static inline void zone_seqlock_init(struct zone *zone) {}
+
+static inline int mhp_notimplemented(const char *func)
+{
+       printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func);
+       dump_stack();
+       return -ENOSYS;
+}
+
+static inline int __add_pages(struct zone *zone, unsigned long start_pfn,
+       unsigned long nr_pages)
+{
+       return mhp_notimplemented(__FUNCTION__);
+}
+#endif /* ! CONFIG_MEMORY_HOTPLUG */
+static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
+       unsigned long nr_pages)
+{
+       printk(KERN_WARNING "%s() called, not yet supported\n", __FUNCTION__);
+       dump_stack();
+       return -ENOSYS;
+}
 #endif /* __LINUX_MEMORY_HOTPLUG_H */