linux-kernel - Re: [PATCH] block: push down BKL into .locked

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Date:	Wed, 2 Jun 2010 06:16:21 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Jens Axboe <jaxboe@...ionio.com>,
	Vivek Goyal <vgoyal@...hat.com>, Tejun Heo <tj@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Douglas Gilbert <dgilbert@...erlog.com>,
	Ingo Molnar <mingo@...hat.com>, John Kacur <jkacur@...hat.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: push down BKL into .locked_ioctl

> Ok, here comes the first step. Can you be more specific
> about what you mean with the open and release methods? 
> Do you mean the sg.c and bsg.c chrdev file operations?

No, the open and release methods in struct block_device_operations.
After this the driver API for block devices is BKL free, which
is an important step.  To get there the locking in blkdev_get/put
needs to be sorted out first, though.


The ioctl pushdown patch looks good to me, btw.

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