mm: accelerate mm_populate() treatment of THP pages

[linux-2.6-block.git] / mm / nommu.c

diff --git a/mm/nommu.c b/mm/nommu.c
index b20db4e222630cebde1ca16879d817977e881618..da0d210fd40335c9ab1d08261e6055fec993e52b 100644 (file)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -140,10 +140,10 @@ unsigned int kobjsize(const void *objp)
        return PAGE_SIZE << compound_order(page);
 }
 
-int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
-                    unsigned long start, int nr_pages, unsigned int foll_flags,
-                    struct page **pages, struct vm_area_struct **vmas,
-                    int *retry)
+long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
+                     unsigned long start, unsigned long nr_pages,
+                     unsigned int foll_flags, struct page **pages,
+                     struct vm_area_struct **vmas, int *nonblocking)
 {
        struct vm_area_struct *vma;
        unsigned long vm_flags;
@@ -190,9 +190,10 @@ finish_or_fault:
  *   slab page or a secondary page from a compound page
  * - don't permit access to VMAs that don't support it, such as I/O mappings
  */
-int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
-       unsigned long start, int nr_pages, int write, int force,
-       struct page **pages, struct vm_area_struct **vmas)
+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,
+                   struct vm_area_struct **vmas)
 {
        int flags = 0;
 
@@ -1250,7 +1251,8 @@ unsigned long do_mmap_pgoff(struct file *file,
                            unsigned long len,
                            unsigned long prot,
                            unsigned long flags,
-                           unsigned long pgoff)
+                           unsigned long pgoff,
+                           unsigned long *populate)
 {
        struct vm_area_struct *vma;
        struct vm_region *region;
@@ -1260,6 +1262,8 @@ unsigned long do_mmap_pgoff(struct file *file,
 
        kenter(",%lx,%lx,%lx,%lx,%lx", addr, len, prot, flags, pgoff);
 
+       *populate = 0;
+
        /* decide whether we should attempt the mapping, and if so what sort of
         * mapping */
        ret = validate_mmap_request(file, addr, len, prot, flags, pgoff,
@@ -1815,9 +1819,11 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
        return ret;
 }
 
-struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
-                       unsigned int foll_flags)
+struct page *follow_page_mask(struct vm_area_struct *vma,
+                             unsigned long address, unsigned int flags,
+                             unsigned int *page_mask)
 {
+       *page_mask = 0;
        return NULL;
 }
 
@@ -1904,7 +1910,7 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
                 */
                free -= global_page_state(NR_SHMEM);
 
-               free += nr_swap_pages;
+               free += get_nr_swap_pages();
 
                /*
                 * Any slabs which are created with the