[PATCH BUGFIX 6/6] block, bfq: clarify the goal of bfq_split_bfqq()

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The exact, general goal of the function bfq_split_bfqq() is not that
apparent. Add a comment to make it clear.

Signed-off-by: Paolo Valente <paolo.valente@xxxxxxxxxx>
---
 block/bfq-iosched.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 28770ec7c06f..347e96292117 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5983,6 +5983,8 @@ static void bfq_finish_requeue_request(struct request *rq)
 }
 
 /*
+ * Removes the association between the current task and bfqq, assuming
+ * that bic points to the bfq iocontext of the task.
  * Returns NULL if a new bfqq should be allocated, or the old bfqq if this
  * was the last process referring to that bfqq.
  */
-- 
2.20.1




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