hugetlb: pte_alloc_huge() to replace huge pte_alloc_map()

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

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 28703fe..cbe1e97 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -191,6 +191,23 @@ extern struct list_head huge_boot_pages;
 
 /* arch callbacks */
 
+#ifndef CONFIG_HIGHPTE
+/*
+ * pte_offset_huge() and pte_alloc_huge() are helpers for those architectures
+ * which may go down to the lowest PTE level in their huge_pte_offset() and
+ * huge_pte_alloc(): to avoid reliance on pte_offset_map() without pte_unmap().
+ */
+static inline pte_t *pte_offset_huge(pmd_t *pmd, unsigned long address)
+{
+       return pte_offset_kernel(pmd, address);
+}
+static inline pte_t *pte_alloc_huge(struct mm_struct *mm, pmd_t *pmd,
+                                   unsigned long address)
+{
+       return pte_alloc(mm, pmd) ? NULL : pte_offset_huge(pmd, address);
+}
+#endif
+
 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
                        unsigned long addr, unsigned long sz);
 /*