Linux-libre 4.5-gnu

1 files changed, 41 insertions, 46 deletions

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index ecb080d6f..459fd25b3 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -19,13 +19,16 @@ extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
 					  unsigned long addr,
 					  pmd_t *pmd,
 					  unsigned int flags);
+extern int madvise_free_huge_pmd(struct mmu_gather *tlb,
+			struct vm_area_struct *vma,
+			pmd_t *pmd, unsigned long addr, unsigned long next);
 extern int zap_huge_pmd(struct mmu_gather *tlb,
 			struct vm_area_struct *vma,
 			pmd_t *pmd, unsigned long addr);
 extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 			unsigned long addr, unsigned long end,
 			unsigned char *vec);
-extern int move_huge_pmd(struct vm_area_struct *vma,
+extern bool move_huge_pmd(struct vm_area_struct *vma,
 			 struct vm_area_struct *new_vma,
 			 unsigned long old_addr,
 			 unsigned long new_addr, unsigned long old_end,
@@ -34,8 +37,7 @@ extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 			unsigned long addr, pgprot_t newprot,
 			int prot_numa);
 int vmf_insert_pfn_pmd(struct vm_area_struct *, unsigned long addr, pmd_t *,
-			unsigned long pfn, bool write);
-
+			pfn_t pfn, bool write);
 enum transparent_hugepage_flag {
 	TRANSPARENT_HUGEPAGE_FLAG,
 	TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
@@ -48,21 +50,13 @@ enum transparent_hugepage_flag {
 #endif
 };
 
-enum page_check_address_pmd_flag {
-	PAGE_CHECK_ADDRESS_PMD_FLAG,
-	PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG,
-	PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG,
-};
-extern pmd_t *page_check_address_pmd(struct page *page,
-				     struct mm_struct *mm,
-				     unsigned long address,
-				     enum page_check_address_pmd_flag flag,
-				     spinlock_t **ptl);
-
 #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
 #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER)
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
+struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr,
+		pmd_t *pmd, int flags);
+
 #define HPAGE_PMD_SHIFT PMD_SHIFT
 #define HPAGE_PMD_SIZE	((1UL) << HPAGE_PMD_SHIFT)
 #define HPAGE_PMD_MASK	(~(HPAGE_PMD_SIZE - 1))
@@ -95,30 +89,28 @@ extern bool is_vma_temporary_stack(struct vm_area_struct *vma);
 #endif /* CONFIG_DEBUG_VM */
 
 extern unsigned long transparent_hugepage_flags;
-extern int split_huge_page_to_list(struct page *page, struct list_head *list);
+
+extern void prep_transhuge_page(struct page *page);
+extern void free_transhuge_page(struct page *page);
+
+int split_huge_page_to_list(struct page *page, struct list_head *list);
 static inline int split_huge_page(struct page *page)
 {
 	return split_huge_page_to_list(page, NULL);
 }
-extern void __split_huge_page_pmd(struct vm_area_struct *vma,
-		unsigned long address, pmd_t *pmd);
-#define split_huge_page_pmd(__vma, __address, __pmd)			\
+void deferred_split_huge_page(struct page *page);
+
+void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
+		unsigned long address);
+
+#define split_huge_pmd(__vma, __pmd, __address)				\
 	do {								\
 		pmd_t *____pmd = (__pmd);				\
-		if (unlikely(pmd_trans_huge(*____pmd)))			\
-			__split_huge_page_pmd(__vma, __address,		\
-					____pmd);			\
+		if (pmd_trans_huge(*____pmd)				\
+					|| pmd_devmap(*____pmd))	\
+			__split_huge_pmd(__vma, __pmd, __address);	\
 	}  while (0)
-#define wait_split_huge_page(__anon_vma, __pmd)				\
-	do {								\
-		pmd_t *____pmd = (__pmd);				\
-		anon_vma_lock_write(__anon_vma);			\
-		anon_vma_unlock_write(__anon_vma);			\
-		BUG_ON(pmd_trans_splitting(*____pmd) ||			\
-		       pmd_trans_huge(*____pmd));			\
-	} while (0)
-extern void split_huge_page_pmd_mm(struct mm_struct *mm, unsigned long address,
-		pmd_t *pmd);
+
 #if HPAGE_PMD_ORDER >= MAX_ORDER
 #error "hugepages can't be allocated by the buddy allocator"
 #endif
@@ -128,17 +120,17 @@ extern void vma_adjust_trans_huge(struct vm_area_struct *vma,
 				    unsigned long start,
 				    unsigned long end,
 				    long adjust_next);
-extern int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
-		spinlock_t **ptl);
+extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd,
+		struct vm_area_struct *vma);
 /* mmap_sem must be held on entry */
-static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
-		spinlock_t **ptl)
+static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd,
+		struct vm_area_struct *vma)
 {
 	VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma);
-	if (pmd_trans_huge(*pmd))
-		return __pmd_trans_huge_lock(pmd, vma, ptl);
+	if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd))
+		return __pmd_trans_huge_lock(pmd, vma);
 	else
-		return 0;
+		return false;
 }
 static inline int hpage_nr_pages(struct page *page)
 {
@@ -183,11 +175,8 @@ static inline int split_huge_page(struct page *page)
 {
 	return 0;
 }
-#define split_huge_page_pmd(__vma, __address, __pmd)	\
-	do { } while (0)
-#define wait_split_huge_page(__anon_vma, __pmd)	\
-	do { } while (0)
-#define split_huge_page_pmd_mm(__mm, __address, __pmd)	\
+static inline void deferred_split_huge_page(struct page *page) {}
+#define split_huge_pmd(__vma, __pmd, __address)	\
 	do { } while (0)
 static inline int hugepage_madvise(struct vm_area_struct *vma,
 				   unsigned long *vm_flags, int advice)
@@ -201,10 +190,10 @@ static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
 					 long adjust_next)
 {
 }
-static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
-		spinlock_t **ptl)
+static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd,
+		struct vm_area_struct *vma)
 {
-	return 0;
+	return NULL;
 }
 
 static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
@@ -218,6 +207,12 @@ static inline bool is_huge_zero_page(struct page *page)
 	return false;
 }
 
+
+static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma,
+		unsigned long addr, pmd_t *pmd, int flags)
+{
+	return NULL;
+}
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 #endif /* _LINUX_HUGE_MM_H */