s390/mm: move kernel_page_present/kernel_map_pages to page_attr.c
Keep related functions together and move to appropriate file.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index 73c3da3..29ccee3 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -105,3 +105,46 @@
{
return 0;
}
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+void kernel_map_pages(struct page *page, int numpages, int enable)
+{
+ unsigned long address;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ int i;
+
+ for (i = 0; i < numpages; i++) {
+ address = page_to_phys(page + i);
+ pgd = pgd_offset_k(address);
+ pud = pud_offset(pgd, address);
+ pmd = pmd_offset(pud, address);
+ pte = pte_offset_kernel(pmd, address);
+ if (!enable) {
+ __ptep_ipte(address, pte);
+ pte_val(*pte) = _PAGE_TYPE_EMPTY;
+ continue;
+ }
+ *pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW));
+ }
+}
+
+#ifdef CONFIG_HIBERNATION
+bool kernel_page_present(struct page *page)
+{
+ unsigned long addr;
+ int cc;
+
+ addr = page_to_phys(page);
+ 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 */