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>

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 735f0190ec2abe8dd68320cf5dc0a188f67af9c9..a786db403efc5d0e9d6036ea7f65f5fd65f2d46c 100644 (file)
--- 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 6c953bb255e760d4109cb35871a42827f69c4a77..9650a956fd0e31ec0c104db1165efa9c565be8db 100644 (file)
--- 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.

diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 7fc62d4550b207ac682021ad01bd9ff3b644d788..3d3a9915dde29193895357edee90c8d3d13c81f3 100644 (file)
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -400,7 +400,6 @@ struct ext3_inode {
 #define EXT3_MOUNT_POSIX_ACL           0x08000 /* POSIX Access Control Lists */
 #define EXT3_MOUNT_RESERVATION         0x10000 /* Preallocation */
 #define EXT3_MOUNT_BARRIER             0x20000 /* Use block barriers */
-#define EXT3_MOUNT_NOBH                        0x40000 /* No bufferheads */
 #define EXT3_MOUNT_QUOTA               0x80000 /* Some quota option set */
 #define EXT3_MOUNT_USRQUOTA            0x100000 /* "old" user quota */
 #define EXT3_MOUNT_GRPQUOTA            0x200000 /* "old" group quota */