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Diffstat (limited to 'drivers/md/dm-snap.c')
-rw-r--r--drivers/md/dm-snap.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 5e553c50c21..288994ee714 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -234,6 +234,16 @@ static int __chunk_is_tracked(struct dm_snapshot *s, chunk_t chunk)
}
/*
+ * This conflicting I/O is extremely improbable in the caller,
+ * so msleep(1) is sufficient and there is no need for a wait queue.
+ */
+static void __check_for_conflicting_io(struct dm_snapshot *s, chunk_t chunk)
+{
+ while (__chunk_is_tracked(s, chunk))
+ msleep(1);
+}
+
+/*
* One of these per registered origin, held in the snapshot_origins hash
*/
struct origin {
@@ -1102,12 +1112,8 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
goto out;
}
- /*
- * Check for conflicting reads. This is extremely improbable,
- * so msleep(1) is sufficient and there is no need for a wait queue.
- */
- while (__chunk_is_tracked(s, pe->e.old_chunk))
- msleep(1);
+ /* Check for conflicting reads */
+ __check_for_conflicting_io(s, pe->e.old_chunk);
/*
* Add a proper exception, and remove the