Merge tag 'staging-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...

[cascardo/linux.git] / mm / nommu.c

diff --git a/mm/nommu.c b/mm/nommu.c
index 842cfdd..8b8faaf 100644 (file)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -109,7 +109,7 @@ unsigned int kobjsize(const void *objp)
        return PAGE_SIZE << compound_order(page);
 }
 
-long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
+static 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)
@@ -160,18 +160,11 @@ finish_or_fault:
  * - don't permit access to VMAs that don't support it, such as I/O mappings
  */
 long get_user_pages(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)
 {
-       int flags = 0;
-
-       if (write)
-               flags |= FOLL_WRITE;
-       if (force)
-               flags |= FOLL_FORCE;
-
-       return __get_user_pages(current, current->mm, start, nr_pages, flags,
-                               pages, vmas, NULL);
+       return __get_user_pages(current, current->mm, start, nr_pages,
+                               gup_flags, pages, vmas, NULL);
 }
 EXPORT_SYMBOL(get_user_pages);
 
@@ -179,10 +172,7 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages,
                            unsigned int gup_flags, struct page **pages,
                            int *locked)
 {
-       int write = gup_flags & FOLL_WRITE;
-       int force = gup_flags & FOLL_FORCE;
-
-       return get_user_pages(start, nr_pages, write, force, pages, NULL);
+       return get_user_pages(start, nr_pages, gup_flags, pages, NULL);
 }
 EXPORT_SYMBOL(get_user_pages_locked);
 
@@ -1819,9 +1809,10 @@ void filemap_map_pages(struct fault_env *fe,
 EXPORT_SYMBOL(filemap_map_pages);
 
 static int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
-               unsigned long addr, void *buf, int len, int write)
+               unsigned long addr, void *buf, int len, unsigned int gup_flags)
 {
        struct vm_area_struct *vma;
+       int write = gup_flags & FOLL_WRITE;
 
        down_read(&mm->mmap_sem);
 
@@ -1856,21 +1847,22 @@ static int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
  * @addr:      start address to access
  * @buf:       source or destination buffer
  * @len:       number of bytes to transfer
- * @write:     whether the access is a write
+ * @gup_flags: flags modifying lookup behaviour
  *
  * The caller must hold a reference on @mm.
  */
 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)
 {
-       return __access_remote_vm(NULL, mm, addr, buf, len, write);
+       return __access_remote_vm(NULL, mm, addr, buf, len, gup_flags);
 }
 
 /*
  * Access another process' address space.
  * - source/target buffer must be kernel space
  */
-int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write)
+int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len,
+               unsigned int gup_flags)
 {
        struct mm_struct *mm;
 
@@ -1881,7 +1873,7 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
        if (!mm)
                return 0;
 
-       len = __access_remote_vm(tsk, mm, addr, buf, len, write);
+       len = __access_remote_vm(tsk, mm, addr, buf, len, gup_flags);
 
        mmput(mm);
        return len;