Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (22 commits)
  [S390] Update default configuration.
  [S390] hibernate: Do real CPU swap at resume time
  [S390] dasd: tolerate devices that have no feature codes
  [S390] zcrypt: Do not add/remove devices in s/r callbacks
  [S390] hibernate: make sure pfn_is_nosave handles lowcore pages
  [S390] smp: introduce LC_ORDER and simplify lowcore handling
  [S390] ptrace: use common code for simple peek/poke operations
  [S390] fix disabled_wait inline assembly clobber list
  [S390] Change kernel_page_present coding style.
  [S390] hibernation: reset system after resume
  [S390] hibernation: fix guest page hinting related crash
  [S390] Get rid of init_module/delete_module compat functions.
  [S390] Convert sys_execve to function with parameters.
  [S390] Convert sys_clone to function with parameters.
  [S390] qdio: change state of all primed input buffers
  [S390] qdio: reduce per device debug messages
  [S390] cio: introduce consistent subchannel scanning
  [S390] cio: idset use actual number of ssids
  [S390] cio: dont kfree vmalloced memory
  [S390] cio: introduce css_settle
  ...

2 files changed, 51 insertions, 18 deletions

diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c
index f92ec203ad92..098923ae458f 100644
--- a/arch/s390/mm/page-states.c
+++ b/arch/s390/mm/page-states.c
@@ -50,28 +50,64 @@ void __init cmma_init(void)
                 cmma_flag = 0;
 }
 
-void arch_free_page(struct page *page, int order)
+static inline void set_page_unstable(struct page *page, int order)
 {
         int i, rc;
 
-        if (!cmma_flag)
-                return;
         for (i = 0; i < (1 << order); i++)
                 asm volatile(".insn rrf,0xb9ab0000,%0,%1,%2,0"
                              : "=&d" (rc)
-                             : "a" ((page_to_pfn(page) + i) << PAGE_SHIFT),
+                             : "a" (page_to_phys(page + i)),
                                "i" (ESSA_SET_UNUSED));
 }
 
-void arch_alloc_page(struct page *page, int order)
+void arch_free_page(struct page *page, int order)
 {
-        int i, rc;
-
         if (!cmma_flag)
                 return;
+        set_page_unstable(page, order);
+}
+
+static inline void set_page_stable(struct page *page, int order)
+{
+        int i, rc;
+
         for (i = 0; i < (1 << order); i++)
                 asm volatile(".insn rrf,0xb9ab0000,%0,%1,%2,0"
                              : "=&d" (rc)
-                             : "a" ((page_to_pfn(page) + i) << PAGE_SHIFT),
+                             : "a" (page_to_phys(page + i)),
                                "i" (ESSA_SET_STABLE));
 }
+
+void arch_alloc_page(struct page *page, int order)
+{
+        if (!cmma_flag)
+                return;
+        set_page_stable(page, order);
+}
+
+void arch_set_page_states(int make_stable)
+{
+        unsigned long flags, order, t;
+        struct list_head *l;
+        struct page *page;
+        struct zone *zone;
+
+        if (!cmma_flag)
+                return;
+        if (make_stable)
+                drain_local_pages(NULL);
+        for_each_populated_zone(zone) {
+                spin_lock_irqsave(&zone->lock, flags);
+                for_each_migratetype_order(order, t) {
+                        list_for_each(l, &zone->free_area[order].free_list[t]) {
+                                page = list_entry(l, struct page, lru);
+                                if (make_stable)
+                                        set_page_stable(page, order);
+                                else
+                                        set_page_unstable(page, order);
+                        }
+                }
+                spin_unlock_irqrestore(&zone->lock, flags);
+        }
+}
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index c70215247071..c60bfb309ce6 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -314,21 +314,18 @@ int s390_enable_sie(void)
 }
 EXPORT_SYMBOL_GPL(s390_enable_sie);
 
-#ifdef CONFIG_DEBUG_PAGEALLOC
-#ifdef CONFIG_HIBERNATION
+#if defined(CONFIG_DEBUG_PAGEALLOC) && defined(CONFIG_HIBERNATION)
 bool kernel_page_present(struct page *page)
 {
         unsigned long addr;
         int cc;
 
         addr = page_to_phys(page);
-        asm("lra %1,0(%1)\n"
-            "ipm %0\n"
-            "srl %0,28"
-            :"=d"(cc),"+a"(addr)::"cc");
+        asm volatile(
+                "       lra     %1,0(%1)\n"
+                "       ipm     %0\n"
+                "       srl     %0,28"
+                : "=d" (cc), "+a" (addr) : : "cc");
         return cc == 0;
 }
-
-#endif /* CONFIG_HIBERNATION */
-#endif /* CONFIG_DEBUG_PAGEALLOC */
-
+#endif /* CONFIG_HIBERNATION && CONFIG_DEBUG_PAGEALLOC */