diff options
Diffstat (limited to 'kernel/power/power.h')
| -rw-r--r-- | kernel/power/power.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index b4f433943209..75b63843886e 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -6,6 +6,7 @@ #include <linux/compiler.h> #include <linux/cpu.h> #include <linux/cpuidle.h> +#include <linux/crypto.h> struct swsusp_info { struct new_utsname uts; @@ -17,6 +18,11 @@ struct swsusp_info { unsigned long size; } __aligned(PAGE_SIZE); +#if defined(CONFIG_SUSPEND) || defined(CONFIG_HIBERNATION) +extern int pm_sleep_fs_sync(void); +extern bool filesystem_freeze_enabled; +#endif + #ifdef CONFIG_HIBERNATION /* kernel/power/snapshot.c */ extern void __init hibernate_reserved_size_init(void); @@ -26,9 +32,6 @@ extern void __init hibernate_image_size_init(void); /* Maximum size of architecture specific data in a hibernation header */ #define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4) -extern int arch_hibernation_header_save(void *addr, unsigned int max_size); -extern int arch_hibernation_header_restore(void *addr); - static inline int init_header_complete(struct swsusp_info *info) { return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE); @@ -41,8 +44,6 @@ static inline const char *check_image_kernel(struct swsusp_info *info) } #endif /* CONFIG_ARCH_HIBERNATION_HEADER */ -extern int hibernate_resume_nonboot_cpu_disable(void); - /* * Keep some memory free so that I/O operations can succeed without paging * [Might this be more than 4 MB?] @@ -59,6 +60,10 @@ asmlinkage int swsusp_save(void); /* kernel/power/hibernate.c */ extern bool freezer_test_done; +extern char hib_comp_algo[CRYPTO_MAX_ALG_NAME]; + +/* kernel/power/swap.c */ +extern unsigned int swsusp_header_flags; extern int hibernation_snapshot(int platform_mode); extern int hibernation_restore(int platform_mode); @@ -71,10 +76,14 @@ extern void enable_restore_image_protection(void); static inline void enable_restore_image_protection(void) {} #endif /* CONFIG_STRICT_KERNEL_RWX */ +extern bool hibernation_in_progress(void); + #else /* !CONFIG_HIBERNATION */ static inline void hibernate_reserved_size_init(void) {} static inline void hibernate_image_size_init(void) {} + +static inline bool hibernation_in_progress(void) { return false; } #endif /* !CONFIG_HIBERNATION */ #define power_attr(_name) \ @@ -110,7 +119,7 @@ extern int hibernate_preallocate_memory(void); extern void clear_or_poison_free_pages(void); -/** +/* * Auxiliary structure used for reading the snapshot image data and * metadata from and writing them to the list of page backup entries * (PBEs) which is the main data structure of swsusp. @@ -153,7 +162,7 @@ extern unsigned int snapshot_additional_pages(struct zone *zone); extern unsigned long snapshot_get_image_size(void); extern int snapshot_read_next(struct snapshot_handle *handle); extern int snapshot_write_next(struct snapshot_handle *handle); -extern void snapshot_write_finalize(struct snapshot_handle *handle); +int snapshot_write_finalize(struct snapshot_handle *handle); extern int snapshot_image_loaded(struct snapshot_handle *handle); extern bool hibernate_acquire(void); @@ -167,19 +176,35 @@ extern int swsusp_swap_in_use(void); * Flags that can be passed from the hibernatig hernel to the "boot" kernel in * the image header. */ +#define SF_COMPRESSION_ALG_LZO 0 /* dummy, details given below */ #define SF_PLATFORM_MODE 1 #define SF_NOCOMPRESS_MODE 2 #define SF_CRC32_MODE 4 #define SF_HW_SIG 8 +/* + * Bit to indicate the compression algorithm to be used(for LZ4). The same + * could be checked while saving/loading image to/from disk to use the + * corresponding algorithms. + * + * By default, LZO compression is enabled if SF_CRC32_MODE is set. Use + * SF_COMPRESSION_ALG_LZ4 to override this behaviour and use LZ4. + * + * SF_CRC32_MODE, SF_COMPRESSION_ALG_LZO(dummy) -> Compression, LZO + * SF_CRC32_MODE, SF_COMPRESSION_ALG_LZ4 -> Compression, LZ4 + */ +#define SF_COMPRESSION_ALG_LZ4 16 + /* kernel/power/hibernate.c */ -extern int swsusp_check(void); +int swsusp_check(bool exclusive); extern void swsusp_free(void); extern int swsusp_read(unsigned int *flags_p); extern int swsusp_write(unsigned int flags); -extern void swsusp_close(fmode_t); +void swsusp_close(void); #ifdef CONFIG_SUSPEND extern int swsusp_unmark(void); +#else +static inline int swsusp_unmark(void) { return 0; } #endif struct __kernel_old_timeval; @@ -325,3 +350,5 @@ static inline void pm_sleep_enable_secondary_cpus(void) suspend_enable_secondary_cpus(); cpuidle_resume(); } + +void dpm_save_errno(int err); |