hugetlbfs: New huge_add_to_page_cache helper routine

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

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 114ad6ce7030add5e95cf3e8829a96965ba431d3..d45eacc5653ed7e84ad650d45682b3b9fff0ea45 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3375,6 +3375,23 @@ static bool hugetlbfs_pagecache_present(struct hstate *h,
        return page != NULL;
 }
 
+int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
+                          pgoff_t idx)
+{
+       struct inode *inode = mapping->host;
+       struct hstate *h = hstate_inode(inode);
+       int err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
+
+       if (err)
+               return err;
+       ClearPagePrivate(page);
+
+       spin_lock(&inode->i_lock);
+       inode->i_blocks += blocks_per_huge_page(h);
+       spin_unlock(&inode->i_lock);
+       return 0;
+}
+
 static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
                           struct address_space *mapping, pgoff_t idx,
                           unsigned long address, pte_t *ptep, unsigned int flags)
@@ -3422,21 +3439,13 @@ retry:
                set_page_huge_active(page);
 
                if (vma->vm_flags & VM_MAYSHARE) {
-                       int err;
-                       struct inode *inode = mapping->host;
-
-                       err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
+                       int err = huge_add_to_page_cache(page, mapping, idx);
                        if (err) {
                                put_page(page);
                                if (err == -EEXIST)
                                        goto retry;
                                goto out;
                        }
-                       ClearPagePrivate(page);
-
-                       spin_lock(&inode->i_lock);
-                       inode->i_blocks += blocks_per_huge_page(h);
-                       spin_unlock(&inode->i_lock);
                } else {
                        lock_page(page);
                        if (unlikely(anon_vma_prepare(vma))) {