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Diffstat (limited to 'arch/s390/mm/page-states.c')
-rw-r--r--arch/s390/mm/page-states.c52
1 files changed, 44 insertions, 8 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);
+ }
+}