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>

1 files changed, 0 insertions, 24 deletions

diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index c7f43944f160..ba1b54e23cae 100644
--- 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)