[PATCH] block: request_queue->ordcolor must not be flipped on SOFTBARRIER
q->ordcolor must not be flipped on SOFTBARRIER. Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -323,7 +323,8 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
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/*
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* toggle ordered color
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*/
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q->ordcolor ^= 1;
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if (blk_barrier_rq(rq))
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q->ordcolor ^= 1;
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/*
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* barriers implicitly indicate back insertion
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