Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

[platform/kernel/linux-rpi.git] / include / linux / hugetlb.h

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index c2b1801..0393270 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -66,6 +66,9 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to,
                                                vm_flags_t vm_flags);
 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
 int dequeue_hwpoisoned_huge_page(struct page *page);
+bool isolate_huge_page(struct page *page, struct list_head *list);
+void putback_active_hugepage(struct page *page);
+bool is_hugepage_active(struct page *page);
 void copy_huge_page(struct page *dst, struct page *src);
 
 #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
@@ -134,6 +137,9 @@ static inline int dequeue_hwpoisoned_huge_page(struct page *page)
        return 0;
 }
 
+#define isolate_huge_page(p, l) false
+#define putback_active_hugepage(p)     do {} while (0)
+#define is_hugepage_active(x)  false
 static inline void copy_huge_page(struct page *dst, struct page *src)
 {
 }
@@ -261,6 +267,8 @@ struct huge_bootmem_page {
 };
 
 struct page *alloc_huge_page_node(struct hstate *h, int nid);
+struct page *alloc_huge_page_noerr(struct vm_area_struct *vma,
+                               unsigned long addr, int avoid_reserve);
 
 /* arch callback */
 int __init alloc_bootmem_huge_page(struct hstate *h);
@@ -371,9 +379,23 @@ static inline pgoff_t basepage_index(struct page *page)
        return __basepage_index(page);
 }
 
+extern void dissolve_free_huge_pages(unsigned long start_pfn,
+                                    unsigned long end_pfn);
+int pmd_huge_support(void);
+/*
+ * Currently hugepage migration is enabled only for pmd-based hugepage.
+ * This function will be updated when hugepage migration is more widely
+ * supported.
+ */
+static inline int hugepage_migration_support(struct hstate *h)
+{
+       return pmd_huge_support() && (huge_page_shift(h) == PMD_SHIFT);
+}
+
 #else  /* CONFIG_HUGETLB_PAGE */
 struct hstate {};
 #define alloc_huge_page_node(h, nid) NULL
+#define alloc_huge_page_noerr(v, a, r) NULL
 #define alloc_bootmem_huge_page(h) NULL
 #define hstate_file(f) NULL
 #define hstate_sizelog(s) NULL
@@ -396,6 +418,9 @@ static inline pgoff_t basepage_index(struct page *page)
 {
        return page->index;
 }
+#define dissolve_free_huge_pages(s, e) do {} while (0)
+#define pmd_huge_support()     0
+#define hugepage_migration_support(h)  0
 #endif /* CONFIG_HUGETLB_PAGE */
 
 #endif /* _LINUX_HUGETLB_H */