277c6e2ad7
This makes the swsusp_info structure become the header of the image in the literal sense (ie. it is saved to the swap and read before any other image data with the help of the swsusp's swap map structure, so generally it is treated in the same way as the rest of the image). The main thing it does is to make swsusp_header contain the offset of the swap map used to track the image data pages rather than the offset of swsusp_info. Simultaneously, swsusp_info becomes the first image page written to the swap. The other changes are generally consequences of the above with a few exceptions (there's some consolidation in the image reading part as a few functions turn into trivial wrappers around something else). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#include <linux/suspend.h>
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#include <linux/utsname.h>
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/* With SUSPEND_CONSOLE defined suspend looks *really* cool, but
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we probably do not take enough locks for switching consoles, etc,
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so bad things might happen.
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*/
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#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
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#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
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#endif
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struct swsusp_info {
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struct new_utsname uts;
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u32 version_code;
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unsigned long num_physpages;
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int cpus;
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unsigned long image_pages;
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unsigned long pages;
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} __attribute__((aligned(PAGE_SIZE)));
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#ifdef CONFIG_SOFTWARE_SUSPEND
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extern int pm_suspend_disk(void);
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#else
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static inline int pm_suspend_disk(void)
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{
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return -EPERM;
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}
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#endif
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extern struct semaphore pm_sem;
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#define power_attr(_name) \
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static struct subsys_attribute _name##_attr = { \
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.attr = { \
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.name = __stringify(_name), \
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.mode = 0644, \
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}, \
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.show = _name##_show, \
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.store = _name##_store, \
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}
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extern struct subsystem power_subsys;
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extern int pm_prepare_console(void);
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extern void pm_restore_console(void);
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/* References to section boundaries */
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extern const void __nosave_begin, __nosave_end;
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extern unsigned int nr_copy_pages;
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extern struct pbe *pagedir_nosave;
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/* Preferred image size in MB (default 500) */
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extern unsigned int image_size;
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extern asmlinkage int swsusp_arch_suspend(void);
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extern asmlinkage int swsusp_arch_resume(void);
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extern unsigned int count_data_pages(void);
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extern void free_pagedir(struct pbe *pblist);
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extern void release_eaten_pages(void);
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extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
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extern void swsusp_free(void);
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extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
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extern unsigned int snapshot_nr_pages(void);
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extern struct pbe *snapshot_pblist(void);
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extern void snapshot_pblist_set(struct pbe *pblist);
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