ext3: remove vestiges of nobh support

The nobh option was only supported for writeback mode, but given that all
write paths (except mmapped writed) actually create buffer heads, it
effectively was a no-op already.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

2 files changed, 5 insertions, 28 deletions

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 735f0190ec2a..a786db403efc 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1625,10 +1625,7 @@ static int ext3_writeback_writepage(struct page *page,
                 goto out_fail;
         }
 
-        if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
-                ret = nobh_writepage(page, ext3_get_block, wbc);
-        else
-                ret = block_write_full_page(page, ext3_get_block, wbc);
+        ret = block_write_full_page(page, ext3_get_block, wbc);
 
         err = ext3_journal_stop(handle);
         if (!ret)
@@ -1922,17 +1919,6 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
         length = blocksize - (offset & (blocksize - 1));
         iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
 
-        /*
-         * For "nobh" option,  we can only work if we don't need to
-         * read-in the page - otherwise we create buffers to do the IO.
-         */
-        if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
-             ext3_should_writeback_data(inode) && PageUptodate(page)) {
-                zero_user(page, offset, length);
-                set_page_dirty(page);
-                goto unlock;
-        }
-
         if (!page_has_buffers(page))
                 create_empty_buffers(page, blocksize, 0);
 
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 6c953bb255e7..9650a956fd0e 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -661,9 +661,6 @@ static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
          */
         seq_puts(seq, ",barrier=");
         seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0");
-        if (test_opt(sb, NOBH))
-                seq_puts(seq, ",nobh");
-
         seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS)));
         if (test_opt(sb, DATA_ERR_ABORT))
                 seq_puts(seq, ",data_err=abort");
@@ -1255,10 +1252,12 @@ set_qf_format:
                         *n_blocks_count = option;
                         break;
                 case Opt_nobh:
-                        set_opt(sbi->s_mount_opt, NOBH);
+                        ext3_msg(sb, KERN_WARNING,
+                                "warning: ignoring deprecated nobh option");
                         break;
                 case Opt_bh:
-                        clear_opt(sbi->s_mount_opt, NOBH);
+                        ext3_msg(sb, KERN_WARNING,
+                                "warning: ignoring deprecated bh option");
                         break;
                 default:
                         ext3_msg(sb, KERN_ERR,
@@ -2001,14 +2000,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
                 break;
         }
 
-        if (test_opt(sb, NOBH)) {
-                if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
-                        ext3_msg(sb, KERN_WARNING,
-                                "warning: ignoring nobh option - "
-                                "it is supported only with writeback mode");
-                        clear_opt(sbi->s_mount_opt, NOBH);
-                }
-        }
         /*
          * The journal_load will have done any necessary log recovery,
          * so we can safely mount the rest of the filesystem now.