mm: remove __hugepage_set_anon_rmap()

This function is identical to __page_set_anon_rmap() since the time, when
it was introduced (8 years ago).  The patch removes the function, and
makes its users to use __page_set_anon_rmap() instead.

Link: http://lkml.kernel.org/r/154504875359.30235.6237926369392564851.stgit@localhost.localdomain
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/rmap.c b/mm/rmap.c
index c75f72f6fe0e47a1d5bcacca9d992626d45d9a55..68a1a5b869a52cef07857559cc448a2ff8396f4b 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1019,7 +1019,7 @@ void page_move_anon_rmap(struct page *page, struct vm_area_struct *vma)
 
 /**
  * __page_set_anon_rmap - set up new anonymous rmap
- * @page:      Page to add to rmap     
+ * @page:      Page or Hugepage to add to rmap
  * @vma:       VM area to add page to.
  * @address:   User virtual address of the mapping     
  * @exclusive: the page is exclusively owned by the current process
@@ -1916,27 +1916,10 @@ void rmap_walk_locked(struct page *page, struct rmap_walk_control *rwc)
 
 #ifdef CONFIG_HUGETLB_PAGE
 /*
- * The following three functions are for anonymous (private mapped) hugepages.
+ * The following two functions are for anonymous (private mapped) hugepages.
  * Unlike common anonymous pages, anonymous hugepages have no accounting code
  * and no lru code, because we handle hugepages differently from common pages.
  */
-static void __hugepage_set_anon_rmap(struct page *page,
-       struct vm_area_struct *vma, unsigned long address, int exclusive)
-{
-       struct anon_vma *anon_vma = vma->anon_vma;
-
-       BUG_ON(!anon_vma);
-
-       if (PageAnon(page))
-               return;
-       if (!exclusive)
-               anon_vma = anon_vma->root;
-
-       anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
-       page->mapping = (struct address_space *) anon_vma;
-       page->index = linear_page_index(vma, address);
-}
-
 void hugepage_add_anon_rmap(struct page *page,
                            struct vm_area_struct *vma, unsigned long address)
 {
@@ -1948,7 +1931,7 @@ void hugepage_add_anon_rmap(struct page *page,
        /* address might be in next vma when migration races vma_adjust */
        first = atomic_inc_and_test(compound_mapcount_ptr(page));
        if (first)
-               __hugepage_set_anon_rmap(page, vma, address, 0);
+               __page_set_anon_rmap(page, vma, address, 0);
 }
 
 void hugepage_add_new_anon_rmap(struct page *page,
@@ -1956,6 +1939,6 @@ void hugepage_add_new_anon_rmap(struct page *page,
 {
        BUG_ON(address < vma->vm_start || address >= vma->vm_end);
        atomic_set(compound_mapcount_ptr(page), 0);
-       __hugepage_set_anon_rmap(page, vma, address, 1);
+       __page_set_anon_rmap(page, vma, address, 1);
 }
 #endif /* CONFIG_HUGETLB_PAGE */