#ifndef _LINUX_SWSUSP_H
#define _LINUX_SWSUSP_H
-#if defined(CONFIG_X86) || defined(CONFIG_FRV)
+#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32)
#include <asm/suspend.h>
#endif
#include <linux/swap.h>
#include <linux/notifier.h>
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/pm.h>
-/* page backup entry */
-typedef struct pbe {
- unsigned long address; /* address of the copy */
- unsigned long orig_address; /* original address of page */
- swp_entry_t swap_address;
- swp_entry_t dummy; /* we need scratch space at
- * end of page (see link, diskpage)
- */
-} suspend_pagedir_t;
-
-#define SWAP_FILENAME_MAXLENGTH 32
-
-
-#define SUSPEND_PD_PAGES(x) (((x)*sizeof(struct pbe))/PAGE_SIZE+1)
-
-/* mm/vmscan.c */
-extern int shrink_mem(void);
+/* struct pbe is used for creating lists of pages that should be restored
+ * atomically during the resume from disk, because the page frames they have
+ * occupied before the suspend are in use.
+ */
+struct pbe {
+ void *address; /* address of the copy */
+ void *orig_address; /* original address of a page */
+ struct pbe *next;
+};
/* mm/page_alloc.c */
extern void drain_local_pages(void);
/* kernel/power/swsusp.c */
extern int software_suspend(void);
+#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
-
+#else
+static inline int pm_prepare_console(void) { return 0; }
+static inline void pm_restore_console(void) {}
+#endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */
#else
static inline int software_suspend(void)
{
printk("Warning: fake suspend called\n");
- return -EPERM;
+ return -ENOSYS;
}
-#endif
-
-#ifdef CONFIG_SMP
-extern void disable_nonboot_cpus(void);
-extern void enable_nonboot_cpus(void);
-#else
-static inline void disable_nonboot_cpus(void) {}
-static inline void enable_nonboot_cpus(void) {}
-#endif
+#endif /* CONFIG_PM */
void save_processor_state(void);
void restore_processor_state(void);
struct saved_context;
void __save_processor_state(struct saved_context *ctxt);
void __restore_processor_state(struct saved_context *ctxt);
+unsigned long get_safe_page(gfp_t gfp_mask);
+
+/*
+ * XXX: We try to keep some more pages free so that I/O operations succeed
+ * without paging. Might this be more?
+ */
+#define PAGES_FOR_IO 1024
#endif /* _LINUX_SWSUSP_H */