Re: block: Fix a WRITE SAME BUG_ON

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On Wed, Jan 30, 2019 at 09:08:50AM -0500, John Dorminy wrote:
> (I use WRITE_SAME to fill devices with a particular pattern in order
> to catch failures to initialize disk structures appropriately,
> personally, but it's just for convenience/speed.)

How do you use it?  We don't have a user interface to generate
REQ_OP_WRITE_SAME requests.

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