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-rw-r--r--kernel/power/power.h20
1 files changed, 19 insertions, 1 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 95fbf2dd3fe3..a0204dfc6c4c 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -11,14 +11,32 @@ struct swsusp_info {
unsigned long size;
} __attribute__((aligned(PAGE_SIZE)));
+#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_ARCH_HIBERNATION_HEADER
+/* 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);
+}
+
+static inline char *check_image_kernel(struct swsusp_info *info)
+{
+ return arch_hibernation_header_restore(info) ?
+ "architecture specific data" : NULL;
+}
+#endif /* CONFIG_ARCH_HIBERNATION_HEADER */
-#ifdef CONFIG_HIBERNATION
/*
* Keep some memory free so that I/O operations can succeed without paging
* [Might this be more than 4 MB?]
*/
#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT)
+
/*
* Keep 1 MB of memory free so that device drivers can allocate some pages in
* their .suspend() routines without breaking the suspend to disk.