android_kernel_xiaomi_sm8350/include/linux/suspend.h
Rafael J. Wysocki 2c1b4a5ca4 [PATCH] swsusp: rework memory freeing on resume
The following patch makes swsusp use the PG_nosave and PG_nosave_free flags to
mark pages that should be freed in case of an error during resume.

This allows us to simplify the code and to use swsusp_free() in all of the
swsusp's resume error paths, which makes them actually work.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:14 -08:00

83 lines
2.0 KiB
C

#ifndef _LINUX_SWSUSP_H
#define _LINUX_SWSUSP_H
#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;
struct pbe *next; /* also used as scratch space at
* end of page (see link, diskpage)
*/
} suspend_pagedir_t;
#define for_each_pbe(pbe, pblist) \
for (pbe = pblist ; pbe ; pbe = pbe->next)
#define PBES_PER_PAGE (PAGE_SIZE/sizeof(struct pbe))
#define PB_PAGE_SKIP (PBES_PER_PAGE-1)
#define for_each_pb_page(pbe, pblist) \
for (pbe = pblist ; pbe ; pbe = (pbe+PB_PAGE_SKIP)->next)
#define SWAP_FILENAME_MAXLENGTH 32
extern dev_t swsusp_resume_device;
/* mm/vmscan.c */
extern int shrink_mem(void);
/* mm/page_alloc.c */
extern void drain_local_pages(void);
extern void mark_free_pages(struct zone *zone);
#ifdef CONFIG_PM
/* kernel/power/swsusp.c */
extern int software_suspend(void);
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
#else
static inline int software_suspend(void)
{
printk("Warning: fake suspend called\n");
return -EPERM;
}
#endif
#ifdef CONFIG_SUSPEND_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
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 512
#endif /* _LINUX_SWSUSP_H */