[PATCH] x86: Move swsusp __pa() dependent code to arch portion

o __pa() should be used only on kernel linearly mapped virtual addresses
  and not on kernel text and data addresses.

o Hibernation code needs to determine the physical address associated
  with kernel symbol to mark a section boundary which contains pages which
  don't have to be saved and restored during hibernate/resume operation.

o Move this piece of code in arch dependent section. So that architectures
  which don't have kernel text/data mapped into kernel linearly mapped
  region can come up with their own ways of determining physical addresses
  associated with a kernel text.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

2 files changed, 2 insertions, 14 deletions

diff --git a/kernel/power/power.h b/kernel/power/power.h
index eb461b816bf4..1c6eef8df4ad 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -23,6 +23,8 @@ static inline int pm_suspend_disk(void)
 }
 #endif
 
+extern int pfn_is_nosave(unsigned long);
+
 extern struct mutex pm_mutex;
 
 #define power_attr(_name) \
@@ -37,9 +39,6 @@ static struct subsys_attribute _name##_attr = {	\
 
 extern struct subsystem power_subsys;
 
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
 /* Preferred image size in bytes (default 500 MB) */
 extern unsigned long image_size;
 extern int in_suspend;
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index fc53ad068128..704c25a3ffec 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -651,17 +651,6 @@ static inline unsigned int count_highmem_pages(void) { return 0; }
 #endif /* CONFIG_HIGHMEM */
 
 /**
- *      pfn_is_nosave - check if given pfn is in the 'nosave' section
- */
-
-static inline 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;
-        return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
-}
-
-/**
  *      saveable - Determine whether a non-highmem page should be included in
  *      the suspend image.
  *