mm/hugetlb: enable arch specific huge page size support for migration

[tomoyo/tomoyo-test1.git] / include / linux / hugetlb.h

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 70bcd89..4cc3871 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -493,18 +493,29 @@ static inline pgoff_t basepage_index(struct page *page)
 extern int dissolve_free_huge_page(struct page *page);
 extern int dissolve_free_huge_pages(unsigned long start_pfn,
                                    unsigned long end_pfn);
-static inline bool hugepage_migration_supported(struct hstate *h)
-{
+
 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+#ifndef arch_hugetlb_migration_supported
+static inline bool arch_hugetlb_migration_supported(struct hstate *h)
+{
        if ((huge_page_shift(h) == PMD_SHIFT) ||
                (huge_page_shift(h) == PUD_SHIFT) ||
                        (huge_page_shift(h) == PGDIR_SHIFT))
                return true;
        else
                return false;
+}
+#endif
 #else
+static inline bool arch_hugetlb_migration_supported(struct hstate *h)
+{
        return false;
+}
 #endif
+
+static inline bool hugepage_migration_supported(struct hstate *h)
+{
+       return arch_hugetlb_migration_supported(h);
 }
 
 /*