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commitc5be1f2c5bupstream. This patch is a fix to patch "bcache: fix bio_{start,end}_io_acct with proper device". The previous patch uses a hack to temporarily set bi_disk to bcache device, which is mistaken too. As Christoph suggests, this patch uses disk_{start,end}_io_acct() to count I/O for bcache device in the correct way. Fixes:85750aeb74("bcache: use bio_{start,end}_io_acct") Signed-off-by: Coly Li <colyli@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>