1 files changed, 26 insertions, 29 deletions

diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index 832867aef3dc..f37528ed222e 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -39,7 +39,7 @@ static int ext3_dx_readdir(struct file * filp,
 static int ext3_release_dir (struct inode * inode,
                                 struct file * filp);
 
-struct file_operations ext3_dir_operations = {
+const struct file_operations ext3_dir_operations = {
         .llseek         = generic_file_llseek,
         .read           = generic_read_dir,
         .readdir        = ext3_readdir,         /* we take BKL. needed?*/
@@ -95,11 +95,10 @@ static int ext3_readdir(struct file * filp,
                          void * dirent, filldir_t filldir)
 {
         int error = 0;
-        unsigned long offset, blk;
-        int i, num, stored;
-        struct buffer_head * bh, * tmp, * bha[16];
-        struct ext3_dir_entry_2 * de;
-        struct super_block * sb;
+        unsigned long offset;
+        int i, stored;
+        struct ext3_dir_entry_2 *de;
+        struct super_block *sb;
         int err;
         struct inode *inode = filp->f_dentry->d_inode;
         int ret = 0;
@@ -124,12 +123,30 @@ static int ext3_readdir(struct file * filp,
         }
 #endif
         stored = 0;
-        bh = NULL;
         offset = filp->f_pos & (sb->s_blocksize - 1);
 
         while (!error && !stored && filp->f_pos < inode->i_size) {
-                blk = (filp->f_pos) >> EXT3_BLOCK_SIZE_BITS(sb);
-                bh = ext3_bread(NULL, inode, blk, 0, &err);
+                unsigned long blk = filp->f_pos >> EXT3_BLOCK_SIZE_BITS(sb);
+                struct buffer_head map_bh;
+                struct buffer_head *bh = NULL;
+
+                map_bh.b_state = 0;
+                err = ext3_get_blocks_handle(NULL, inode, blk, 1,
+                                                &map_bh, 0, 0);
+                if (err > 0) {
+                        page_cache_readahead(sb->s_bdev->bd_inode->i_mapping,
+                                &filp->f_ra,
+                                filp,
+                                map_bh.b_blocknr >>
+                                        (PAGE_CACHE_SHIFT - inode->i_blkbits),
+                                1);
+                        bh = ext3_bread(NULL, inode, blk, 0, &err);
+                }
+
+                /*
+                 * We ignore I/O errors on directories so users have a chance
+                 * of recovering data when there's a bad sector
+                 */
                 if (!bh) {
                         ext3_error (sb, "ext3_readdir",
                                 "directory #%lu contains a hole at offset %lu",
@@ -138,26 +155,6 @@ static int ext3_readdir(struct file * filp,
                         continue;
                 }
 
-                /*
-                 * Do the readahead
-                 */
-                if (!offset) {
-                        for (i = 16 >> (EXT3_BLOCK_SIZE_BITS(sb) - 9), num = 0;
-                             i > 0; i--) {
-                                tmp = ext3_getblk (NULL, inode, ++blk, 0, &err);
-                                if (tmp && !buffer_uptodate(tmp) &&
-                                                !buffer_locked(tmp))
-                                        bha[num++] = tmp;
-                                else
-                                        brelse (tmp);
-                        }
-                        if (num) {
-                                ll_rw_block (READA, num, bha);
-                                for (i = 0; i < num; i++)
-                                        brelse (bha[i]);
-                        }
-                }
-
 revalidate:
                 /* If the dir block has changed since the last call to
                  * readdir(2), then we might be pointing to an invalid