return NULL;
}
-/**
- * thp_order - Order of a transparent huge page.
- * @page: Head page of a transparent huge page.
- */
-static inline unsigned int thp_order(struct page *page)
-{
- VM_BUG_ON_PGFLAGS(PageTail(page), page);
- if (PageHead(page))
- return HPAGE_PMD_ORDER;
- return 0;
-}
-
-/**
- * thp_nr_pages - The number of regular pages in this huge page.
- * @page: The head page of a huge page.
- */
-static inline int thp_nr_pages(struct page *page)
-{
- VM_BUG_ON_PGFLAGS(PageTail(page), page);
- if (PageHead(page))
- return HPAGE_PMD_NR;
- return 1;
-}
-
/**
* folio_test_pmd_mappable - Can we map this folio with a PMD?
* @folio: The folio to test
#define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; })
#define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; })
-static inline unsigned int thp_order(struct page *page)
-{
- VM_BUG_ON_PGFLAGS(PageTail(page), page);
- return 0;
-}
-
-static inline int thp_nr_pages(struct page *page)
-{
- VM_BUG_ON_PGFLAGS(PageTail(page), page);
- return 1;
-}
-
static inline bool folio_test_pmd_mappable(struct folio *folio)
{
return false;
return split_huge_page_to_list(&folio->page, list);
}
-/**
- * thp_size - Size of a transparent huge page.
- * @page: Head page of a transparent huge page.
- *
- * Return: Number of bytes in this page.
- */
-static inline unsigned long thp_size(struct page *page)
-{
- return PAGE_SIZE << thp_order(page);
-}
-
#endif /* _LINUX_HUGE_MM_H */
return PAGE_SHIFT + compound_order(page);
}
+/**
+ * thp_order - Order of a transparent huge page.
+ * @page: Head page of a transparent huge page.
+ */
+static inline unsigned int thp_order(struct page *page)
+{
+ VM_BUG_ON_PGFLAGS(PageTail(page), page);
+ return compound_order(page);
+}
+
+/**
+ * thp_nr_pages - The number of regular pages in this huge page.
+ * @page: The head page of a huge page.
+ */
+static inline int thp_nr_pages(struct page *page)
+{
+ VM_BUG_ON_PGFLAGS(PageTail(page), page);
+ return compound_nr(page);
+}
+
+/**
+ * thp_size - Size of a transparent huge page.
+ * @page: Head page of a transparent huge page.
+ *
+ * Return: Number of bytes in this page.
+ */
+static inline unsigned long thp_size(struct page *page)
+{
+ return PAGE_SIZE << thp_order(page);
+}
+
void free_compound_page(struct page *page);
#ifdef CONFIG_MMU