This commit flushes the journal on suspend. It is prerequisite for the 
next commit that enables to activate dm integrity devices in read-only 
mode.

Note that we deliberately didn't flush the journal on suspend, so that the
journal replay code would be tested. However, the dm-integrity code is 5
years old now, so that journal replay is well-tested, and we can make this
change now.

Signed-off-by: Mikulas Patocka <[email protected]>

Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c
+++ linux-2.6/drivers/md/dm-integrity.c
@@ -2591,10 +2591,6 @@ static void integrity_writer(struct work
 
        unsigned prev_free_sectors;
 
-       /* the following test is not needed, but it tests the replay code */
-       if (unlikely(dm_post_suspending(ic->ti)) && !ic->meta_dev)
-               return;
-
        spin_lock_irq(&ic->endio_wait.lock);
        write_start = ic->committed_section;
        write_sections = ic->n_committed_sections;
@@ -3101,8 +3097,7 @@ static void dm_integrity_postsuspend(str
        drain_workqueue(ic->commit_wq);
 
        if (ic->mode == 'J') {
-               if (ic->meta_dev)
-                       queue_work(ic->writer_wq, &ic->writer_work);
+               queue_work(ic->writer_wq, &ic->writer_work);
                drain_workqueue(ic->writer_wq);
                dm_integrity_flush_buffers(ic, true);
        }
--
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