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authorIngo Molnar <mingo@elte.hu>2009-06-17 12:52:15 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-17 12:56:49 +0200
commiteadb8a091b27a840de7450f84ecff5ef13476424 (patch)
tree58c3782d40def63baa8167f3d31e3048cb4c7660 /arch/s390/power/suspend.c
parent73874005cd8800440be4299bd095387fff4b90ac (diff)
parent65795efbd380a832ae508b04dba8f8e53f0b84d9 (diff)
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts: arch/x86/Kconfig arch/x86/kernel/traps.c arch/x86/power/cpu.c arch/x86/power/cpu_32.c kernel/Makefile Semantic conflict: arch/x86/kernel/hw_breakpoint.c Merge reason: Resolve the conflicts, move from put_cpu_no_sched() to put_cpu() in arch/x86/kernel/hw_breakpoint.c. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/s390/power/suspend.c')
-rw-r--r--arch/s390/power/suspend.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/s390/power/suspend.c b/arch/s390/power/suspend.c
new file mode 100644
index 00000000000..b3351eceebb
--- /dev/null
+++ b/arch/s390/power/suspend.c
@@ -0,0 +1,40 @@
+/*
+ * Suspend support specific for s390.
+ *
+ * Copyright IBM Corp. 2009
+ *
+ * Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
+ */
+
+#include <linux/mm.h>
+#include <linux/suspend.h>
+#include <linux/reboot.h>
+#include <linux/pfn.h>
+#include <asm/sections.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));
+
+ 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))
+ return 1;
+ return 0;
+}