ext3: Remove the obsolete broken EXT3_IOC32_WAIT_FOR_READONLY.

There are no user of EXT3_IOC32_WAIT_FOR_READONLY and also it is
broken. No one set the set_ro_timer, no one wake up us and our
state is set to TASK_INTERRUPTIBLE not RUNNING. So remove it.

Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index c7f4394..ba1b54e 100644 (file)
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -150,30 +150,6 @@ setversion_out:
                mnt_drop_write(filp->f_path.mnt);
                return err;
        }
-#ifdef CONFIG_JBD_DEBUG
-       case EXT3_IOC_WAIT_FOR_READONLY:
-               /*
-                * This is racy - by the time we're woken up and running,
-                * the superblock could be released.  And the module could
-                * have been unloaded.  So sue me.
-                *
-                * Returns 1 if it slept, else zero.
-                */
-               {
-                       struct super_block *sb = inode->i_sb;
-                       DECLARE_WAITQUEUE(wait, current);
-                       int ret = 0;
-
-                       set_current_state(TASK_INTERRUPTIBLE);
-                       add_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
-                       if (timer_pending(&EXT3_SB(sb)->turn_ro_timer)) {
-                               schedule();
-                               ret = 1;
-                       }
-                       remove_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
-                       return ret;
-               }
-#endif
        case EXT3_IOC_GETRSVSZ:
                if (test_opt(inode->i_sb, RESERVATION)
                        && S_ISREG(inode->i_mode)

diff --git a/include/linux/ext3_fs_sb.h b/include/linux/ext3_fs_sb.h
index 258088a..6436525 100644 (file)
--- a/include/linux/ext3_fs_sb.h
+++ b/include/linux/ext3_fs_sb.h
@@ -76,10 +76,6 @@ struct ext3_sb_info {
        struct mutex s_resize_lock;
        unsigned long s_commit_interval;
        struct block_device *journal_bdev;
-#ifdef CONFIG_JBD_DEBUG
-       struct timer_list turn_ro_timer;        /* For turning read-only (crash simulation) */
-       wait_queue_head_t ro_wait_queue;        /* For people waiting for the fs to go read-only */
-#endif
 #ifdef CONFIG_QUOTA
        char *s_qf_names[MAXQUOTAS];            /* Names of quota files with journalled quota */
        int s_jquota_fmt;                       /* Format of quota to use */