Merge branch 'for-linus' of git://www.atmel.no/~hskinnemoen/linux/kernel/avr32

[powerpc.git] / kernel / power / power.h

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 3763343..5138148 100644 (file)
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -14,15 +14,24 @@ struct swsusp_info {
 
 
 #ifdef CONFIG_SOFTWARE_SUSPEND
-extern int pm_suspend_disk(void);
+/*
+ * Keep some memory free so that I/O operations can succeed without paging
+ * [Might this be more than 4 MB?]
+ */
+#define PAGES_FOR_IO   ((4096 * 1024) >> PAGE_SHIFT)
+/*
+ * Keep 1 MB of memory free so that device drivers can allocate some pages in
+ * their .suspend() routines without breaking the suspend to disk.
+ */
+#define SPARE_PAGES    ((1024 * 1024) >> PAGE_SHIFT)
 
-#else
-static inline int pm_suspend_disk(void)
-{
-       return -EPERM;
-}
+extern struct hibernation_ops *hibernation_ops;
 #endif
-extern struct semaphore pm_sem;
+
+extern int pfn_is_nosave(unsigned long);
+
+extern struct mutex pm_mutex;
+
 #define power_attr(_name) \
 static struct subsys_attribute _name##_attr = {        \
        .attr   = {                             \
@@ -33,10 +42,7 @@ static struct subsys_attribute _name##_attr = {      \
        .store  = _name##_store,                \
 }
 
-extern struct subsystem power_subsys;
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
+extern struct kset power_subsys;
 
 /* Preferred image size in bytes (default 500 MB) */
 extern unsigned long image_size;
@@ -47,6 +53,8 @@ extern sector_t swsusp_resume_block;
 extern asmlinkage int swsusp_arch_suspend(void);
 extern asmlinkage int swsusp_arch_resume(void);
 
+extern int create_basic_memory_bitmaps(void);
+extern void free_basic_memory_bitmaps(void);
 extern unsigned int count_data_pages(void);
 
 /**
@@ -137,30 +145,12 @@ struct resume_swap_area {
 #define PMOPS_ENTER    2
 #define PMOPS_FINISH   3
 
-/**
- *     The bitmap is used for tracing allocated swap pages
- *
- *     The entire bitmap consists of a number of bitmap_page
- *     structures linked with the help of the .next member.
- *     Thus each page can be allocated individually, so we only
- *     need to make 0-order memory allocations to create
- *     the bitmap.
- */
-
-#define BITMAP_PAGE_SIZE       (PAGE_SIZE - sizeof(void *))
-#define BITMAP_PAGE_CHUNKS     (BITMAP_PAGE_SIZE / sizeof(long))
-#define BITS_PER_CHUNK         (sizeof(long) * 8)
-#define BITMAP_PAGE_BITS       (BITMAP_PAGE_CHUNKS * BITS_PER_CHUNK)
-
-struct bitmap_page {
-       unsigned long           chunks[BITMAP_PAGE_CHUNKS];
-       struct bitmap_page      *next;
-};
+/* If unset, the snapshot device cannot be open. */
+extern atomic_t snapshot_device_available;
 
-extern void free_bitmap(struct bitmap_page *bitmap);
-extern struct bitmap_page *alloc_bitmap(unsigned int nr_bits);
-extern sector_t alloc_swapdev_block(int swap, struct bitmap_page *bitmap);
-extern void free_all_swap_pages(int swap, struct bitmap_page *bitmap);
+extern sector_t alloc_swapdev_block(int swap);
+extern void free_all_swap_pages(int swap);
+extern int swsusp_swap_in_use(void);
 
 extern int swsusp_check(void);
 extern int swsusp_shrink_memory(void);
@@ -171,3 +161,7 @@ extern int swsusp_read(void);
 extern int swsusp_write(void);
 extern void swsusp_close(void);
 extern int suspend_enter(suspend_state_t state);
+
+struct timeval;
+extern void swsusp_show_speed(struct timeval *, struct timeval *,
+                               unsigned int, char *);