[PATCH 4.4 001/160] bcache: fix miss key refill->end in writeback

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Tang Junhui commit 2d6cb6edd2c7fb4f40998895bda45006281b1ac5 upstream. refill->end record the last key of writeback, for example, at the first time, keys (1,128K) to (1,1024K) are flush to the

[PATCH 4.4 001/160] bcache: fix miss key refill->end in writeback

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Tang Junhui commit 2d6cb6edd2c7fb4f40998895bda45006281b1ac5 upstream. refill->end record the last key of writeback, for example, at the first time, keys (1,128K) to (1,1024K) are flush to the