nommu: fix shared mmap after truncate shrinkage problems

[pandora-kernel.git] / fs / ramfs / file-nommu.c

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 2665313..1739a4a 100644 (file)
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -121,35 +121,6 @@ add_error:
        return ret;
 }
 
-/*****************************************************************************/
-/*
- * check that file shrinkage doesn't leave any VMAs dangling in midair
- */
-static int ramfs_nommu_check_mappings(struct inode *inode,
-                                     size_t newsize, size_t size)
-{
-       struct vm_area_struct *vma;
-       struct prio_tree_iter iter;
-
-       down_write(&nommu_region_sem);
-
-       /* search for VMAs that fall within the dead zone */
-       vma_prio_tree_foreach(vma, &iter, &inode->i_mapping->i_mmap,
-                             newsize >> PAGE_SHIFT,
-                             (size + PAGE_SIZE - 1) >> PAGE_SHIFT
-                             ) {
-               /* found one - only interested if it's shared out of the page
-                * cache */
-               if (vma->vm_flags & VM_SHARED) {
-                       up_write(&nommu_region_sem);
-                       return -ETXTBSY; /* not quite true, but near enough */
-               }
-       }
-
-       up_write(&nommu_region_sem);
-       return 0;
-}
-
 /*****************************************************************************/
 /*
  *
@@ -169,7 +140,7 @@ static int ramfs_nommu_resize(struct inode *inode, loff_t newsize, loff_t size)
 
        /* check that a decrease in size doesn't cut off any shared mappings */
        if (newsize < size) {
-               ret = ramfs_nommu_check_mappings(inode, newsize, size);
+               ret = nommu_shrink_inode_mappings(inode, size, newsize);
                if (ret < 0)
                        return ret;
        }