Make it possible to test the REQ_ATOM_COMPLETE bit from outside the
block layer core.
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Cc: Jens Axboe <axboe@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Joe Lawrence <joe.lawrence@xxxxxxxxxxx>
---
block/blk-softirq.c | 13 +++++++++++++
include/linux/blkdev.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/block/blk-softirq.c b/block/blk-softirq.c
index 53b1737..fc7d160 100644
--- a/block/blk-softirq.c
+++ b/block/blk-softirq.c
@@ -172,6 +172,19 @@ void blk_complete_request(struct request *req)
}
EXPORT_SYMBOL(blk_complete_request);
+/**
+ * blk_rq_completed - whether or not a request has been completed
+ *
+ * Intended for debugging purposes only. Any completion handler code should go
+ * into the softirq_done_fn() and/or in the rq_timed_out_fn() request_queue
+ * callback functions.
+ */
+bool blk_rq_completed(struct request *rq)
+{
+ return test_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags);
+}
+EXPORT_SYMBOL(blk_rq_completed);
+
static __init int blk_softirq_init(void)
{
int i;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0d84981..a621bc5 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -952,6 +952,7 @@ extern void blk_complete_request(struct request *);
extern void __blk_complete_request(struct request *);
extern void blk_abort_request(struct request *);
extern void blk_unprep_request(struct request *);
+extern bool blk_rq_completed(struct request *);
/*
* Access functions for manipulating queue properties
--
1.8.4.5
--
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