Hi,
this patch fixes a bug I've found while debugging a failure reported
by Yi Zhang [1].

This patch seems to make that failure disappear [1]. Yet it was tested
only together with other debug patches (which add logs and invariant
checks), so I don't know whether the other patches influenced the
outcome as well. At any rate, this patch does fix a bug.

Thanks,
Paolo

[1] https://www.spinics.net/lists/linux-block/msg67840.html


Paolo Valente (1):
  block, bfq: avoid circular stable merges

 block/bfq-iosched.c | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

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2.20.1