linux-kernel - Re: [PATCH] block: update locking context for blk_free

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Date:	Mon, 13 Oct 2014 14:18:57 -0600
From:	Jens Axboe <axboe@...com>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>,
	<linux-kernel@...r.kernel.org>
CC:	<keith.busch@...el.com>
Subject: Re: [PATCH] block: update locking context for blk_free_devt

On 2014-10-13 12:35, Dmitry Monakhov wrote:
> After 2da78092 this function will not longer sleepy
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> ---
>   block/genhd.c |    4 +---
>   1 files changed, 1 insertions(+), 3 deletions(-)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 09da5e4..ae9aaa5 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -441,12 +441,10 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
>    * Free @devt which was allocated using blk_alloc_devt().
>    *
>    * CONTEXT:
> - * Might sleep.
> + * Don't care.
>    */
>   void blk_free_devt(dev_t devt)
>   {
> -	might_sleep();
> -
>   	if (devt == MKDEV(0, 0))
>   		return;

What's this against? The might_sleep() was killed about a month ago by 
commit 46f341ffcfb5. The comment wasn't updated though, it should be.

-- 
Jens Axboe

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