[PATCH 12/14] sr: convert to the atomic queue limits API

[Martin K. Petersen]

Christoph,

> Assign all queue limits through a local queue_limits variable and
> queue_limits_commit_update so that we can't race updating them from
> multiple places, and free the queue when updating them so that
> in-progress I/O submissions don't see half-updated limits.

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

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Martin K. Petersen	Oracle Linux Engineering