[PATCH v2 4/7] blk-mq: Introduce blk_quiesce_queue() and blk_resume_queue()

[Bart Van Assche]

On 10/05/2016 03:49 PM, Ming Lei wrote:
> We can use srcu read lock for BLOCKING and rcu read lock for non-BLOCKING,
> by putting *_read_lock() and *_read_unlock() into two wrappers, which
> should minimize the cost of srcu read lock & unlock and the code is still easy
> to read & verify.

Hello Ming,

The lock checking algorithms in the sparse and smatch static checkers 
are unable to deal with code of the type "if (condition) (un)lock()". So 
unless someone has a better proposal my preference is to use the 
approach from the patch at the start of this e-mail thread.

Thanks,

Bart.