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-rw-r--r--arch/s390/kernel/suspend.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index 086bee970cae..cf9e5c6d5527 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -6,36 +6,26 @@
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
*/
-#include <linux/suspend.h>
-#include <linux/reboot.h>
#include <linux/pfn.h>
-#include <linux/mm.h>
-#include <asm/sections.h>
#include <asm/system.h>
-#include <asm/ipl.h>
/*
* References to section boundaries
*/
extern const void __nosave_begin, __nosave_end;
-/*
- * check if given pfn is in the 'nosave' or in the read only NSS section
- */
int pfn_is_nosave(unsigned long pfn)
{
- unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
- unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end))
- >> PAGE_SHIFT;
- unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
- unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
+ unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
+ unsigned long nosave_end_pfn = PFN_DOWN(__pa(&__nosave_end));
+ /* Always save lowcore pages (LC protection might be enabled). */
+ if (pfn <= LC_PAGES)
+ return 0;
if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
return 1;
- if (pfn >= stext_pfn && pfn <= eshared_pfn) {
- if (ipl_info.type == IPL_TYPE_NSS)
- return 1;
- } else if ((tprot(pfn * PAGE_SIZE) && pfn > 0))
+ /* Skip memory holes and read-only pages (NSS, DCSS, ...). */
+ if (tprot(PFN_PHYS(pfn)))
return 1;
return 0;
}