linux-kernel - Re: [PATCH 01/11] Export __smp_call_function

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Date:	Thu, 24 Oct 2013 02:50:10 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, hch@...radead.org,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 01/11] Export __smp_call_function_single()

On Thu, Oct 24, 2013 at 10:25:54AM +0100, Jens Axboe wrote:
> The blk-mq core and the blk-mq null driver uses it.

Can't say I really like exporting it as all users will need a major
ifdef mess.  If at all we'd expose the higher level add to llist and ipi
abstraction that both blk-mq and the null_blk driver use.

For now I'd just suggest removing the NULL_IRQ_SOFTIRQ mode from
null_blk and decouple that from blk-mq itself.  I'll try to cook up such
an abstraction in the meantime.
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