[PATCH 3.16.y-ckt 067/180] bcache: Change refill_dirty() to always scan entire disk if necessary

3.16.7-ckt24 -stable review patch. If anyone has any objections, please let me know. ---8< From: Kent Overstreet commit 627ccd20b4ad3ba836472468208e2ac4dfadbf03 upstream. Previously, it would only scan the entire disk if it was

[PATCH 3.16.y-ckt 067/180] bcache: Change refill_dirty() to always scan entire disk if necessary

3.16.7-ckt24 -stable review patch. If anyone has any objections, please let me know. ---8< From: Kent Overstreet commit 627ccd20b4ad3ba836472468208e2ac4dfadbf03 upstream. Previously, it would only scan