lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] swsusp: separate swap-writing/reading code

Browse Source 
Move the swap-writing/reading code of swsusp to a separate file.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rafael J. Wysocki
2006-03-23 03:00:00 -08:00
committed by Linus Torvalds
parent f577eb30af
commit 61159a314b
4 changed files with 581 additions and 564 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
kernel/power/power.h
View File

@@ -41,8 +41,8 @@ extern struct pbe *pagedir_nosave;
/* Preferred image size in bytes (default 500 MB) */
extern unsigned long image_size;
extern int in_suspend;
extern dev_t swsusp_resume_device;
extern asmlinkage int swsusp_arch_suspend(void);
extern asmlinkage int swsusp_arch_resume(void);
@@ -65,3 +65,32 @@ struct snapshot_handle {
extern int snapshot_read_next(struct snapshot_handle *handle, size_t count);
extern int snapshot_write_next(struct snapshot_handle *handle, size_t count);
int snapshot_image_loaded(struct snapshot_handle *handle);
/**
* 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;
};
extern void free_bitmap(struct bitmap_page *bitmap);
extern struct bitmap_page *alloc_bitmap(unsigned int nr_bits);
extern unsigned long alloc_swap_page(int swap, struct bitmap_page *bitmap);
extern void free_all_swap_pages(int swap, struct bitmap_page *bitmap);
extern int swsusp_shrink_memory(void);
extern int swsusp_suspend(void);
extern int swsusp_resume(void);