Merge 4.4.168 into android-4.4

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 941c7f7..dd64621 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -240,10 +240,14 @@ extern pgprot_t protection_map[16];
  * ->fault function. The vma's ->fault is responsible for returning a bitmask
  * of VM_FAULT_xxx flags that give details about how the fault was handled.
  *
+ * MM layer fills up gfp_mask for page allocations but fault handler might
+ * alter it if its implementation requires a different allocation context.
+ *
  * pgoff should be used in favour of virtual_address, if possible.
  */
 struct vm_fault {
        unsigned int flags;             /* FAULT_FLAG_xxx flags */
+       gfp_t gfp_mask;                 /* gfp mask to be used for allocations */
        pgoff_t pgoff;                  /* Logical page offset based on vma */
        void __user *virtual_address;   /* Faulting virtual address */
 
@@ -1203,7 +1207,7 @@ static inline int fixup_user_fault(struct task_struct *tsk,
 
 extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write);
 extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
-               void *buf, int len, int write);
+               void *buf, int len, unsigned int gup_flags);
 
 long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                      unsigned long start, unsigned long nr_pages,
@@ -1211,19 +1215,17 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                      struct vm_area_struct **vmas, int *nonblocking);
 long get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                    unsigned long start, unsigned long nr_pages,
-                   int write, int force, struct page **pages,
+                   unsigned int gup_flags, struct page **pages,
                    struct vm_area_struct **vmas);
 long get_user_pages_locked(struct task_struct *tsk, struct mm_struct *mm,
                    unsigned long start, unsigned long nr_pages,
-                   int write, int force, struct page **pages,
-                   int *locked);
+                   unsigned int gup_flags, struct page **pages, int *locked);
 long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,
                               unsigned long start, unsigned long nr_pages,
-                              int write, int force, struct page **pages,
-                              unsigned int gup_flags);
+                              struct page **pages, unsigned int gup_flags);
 long get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,
                    unsigned long start, unsigned long nr_pages,
-                   int write, int force, struct page **pages);
+                   struct page **pages, unsigned int gup_flags);
 int get_user_pages_fast(unsigned long start, int nr_pages, int write,
                        struct page **pages);
 
@@ -1241,7 +1243,7 @@ struct frame_vector {
 struct frame_vector *frame_vector_create(unsigned int nr_frames);
 void frame_vector_destroy(struct frame_vector *vec);
 int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,
-                    bool write, bool force, struct frame_vector *vec);
+                    unsigned int gup_flags, struct frame_vector *vec);
 void put_vaddr_frames(struct frame_vector *vec);
 int frame_vector_to_pages(struct frame_vector *vec);
 void frame_vector_to_pfns(struct frame_vector *vec);
@@ -2070,6 +2072,12 @@ static inline struct vm_area_struct *find_exact_vma(struct mm_struct *mm,
        return vma;
 }
 
+static inline bool range_in_vma(struct vm_area_struct *vma,
+                               unsigned long start, unsigned long end)
+{
+       return (vma && vma->vm_start <= start && end <= vma->vm_end);
+}
+
 #ifdef CONFIG_MMU
 pgprot_t vm_get_page_prot(unsigned long vm_flags);
 void vma_set_page_prot(struct vm_area_struct *vma);
@@ -2095,6 +2103,8 @@ int remap_pfn_range(struct vm_area_struct *, unsigned long addr,
 int vm_insert_page(struct vm_area_struct *, unsigned long addr, struct page *);
 int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
                        unsigned long pfn);
+int vm_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
+                       unsigned long pfn, pgprot_t pgprot);
 int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
                        unsigned long pfn);
 int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len);
@@ -2126,6 +2136,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
 #define FOLL_TRIED     0x800   /* a retry, previous pass started an IO */
 #define FOLL_MLOCK     0x1000  /* lock present pages */
 #define FOLL_COW       0x4000  /* internal GUP flag */
+#define FOLL_ANON      0x8000  /* don't do file mappings */
 
 typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
                        void *data);
@@ -2161,14 +2172,18 @@ kernel_map_pages(struct page *page, int numpages, int enable)
 }
 #ifdef CONFIG_HIBERNATION
 extern bool kernel_page_present(struct page *page);
-#endif /* CONFIG_HIBERNATION */
-#else
+#endif /* CONFIG_HIBERNATION */
+#else  /* CONFIG_DEBUG_PAGEALLOC */
 static inline void
 kernel_map_pages(struct page *page, int numpages, int enable) {}
 #ifdef CONFIG_HIBERNATION
 static inline bool kernel_page_present(struct page *page) { return true; }
-#endif /* CONFIG_HIBERNATION */
-#endif
+#endif /* CONFIG_HIBERNATION */
+static inline bool debug_pagealloc_enabled(void)
+{
+       return false;
+}
+#endif /* CONFIG_DEBUG_PAGEALLOC */
 
 #ifdef __HAVE_ARCH_GATE_AREA
 extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm);