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-rw-r--r--arch/i386/power/suspend.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/i386/power/suspend.c b/arch/i386/power/suspend.c
index db5e98d2eb73..a0020b913f31 100644
--- a/arch/i386/power/suspend.c
+++ b/arch/i386/power/suspend.c
@@ -16,6 +16,9 @@
/* Defined in arch/i386/power/swsusp.S */
extern int restore_image(void);
+/* References to section boundaries */
+extern const void __nosave_begin, __nosave_end;
+
/* Pointer to the temporary resume page tables */
pgd_t *resume_pg_dir;
@@ -156,3 +159,14 @@ int swsusp_arch_resume(void)
restore_image();
return 0;
}
+
+/*
+ * pfn_is_nosave - check if given pfn is in the 'nosave' section
+ */
+
+int pfn_is_nosave(unsigned long pfn)
+{
+ unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >> PAGE_SHIFT;
+ unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT;
+ return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
+}