linux-kernel - Re: [PATCH 03/10] block: move blk_throtl prototypes to block/blk.h

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Message-ID: <20111019133358.GB1140@redhat.com>
Date:	Wed, 19 Oct 2011 09:33:58 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org, ctalbott@...gle.com,
	ni@...gle.com
Subject: Re: [PATCH 03/10] block: move blk_throtl prototypes to block/blk.h

On Tue, Oct 18, 2011 at 09:26:17PM -0700, Tejun Heo wrote:
> blk_throtl interface is block internal and there's no reason to have
> them in linux/blkdev.h.  Move them to block/blk.h.
> 
> This patch doesn't introduce any functional change.
> 

Looks good to me.

Acked-by: Vivek Goyal <vgoyal@...hat.com>

Vivek

> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Vivek Goyal <vgoyal@...hat.com>
> Cc: Jens Axboe <axboe@...nel.dk>
> ---
>  block/blk-throttle.c   |    1 +
>  block/blk.h            |   15 ++++++++++++++-
>  include/linux/blkdev.h |   14 --------------
>  3 files changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/block/blk-throttle.c b/block/blk-throttle.c
> index a19f58c..f3f495e 100644
> --- a/block/blk-throttle.c
> +++ b/block/blk-throttle.c
> @@ -10,6 +10,7 @@
>  #include <linux/bio.h>
>  #include <linux/blktrace_api.h>
>  #include "blk-cgroup.h"
> +#include "blk.h"
>  
>  /* Max dispatch from a group in 1 round */
>  static int throtl_grp_quantum = 8;
> diff --git a/block/blk.h b/block/blk.h
> index 20b900a..da247ba 100644
> --- a/block/blk.h
> +++ b/block/blk.h
> @@ -188,4 +188,17 @@ static inline int blk_do_io_stat(struct request *rq)
>  	        (rq->cmd_flags & REQ_DISCARD));
>  }
>  
> -#endif
> +#ifdef CONFIG_BLK_DEV_THROTTLING
> +extern int blk_throtl_bio(struct request_queue *q, struct bio **bio);
> +extern int blk_throtl_init(struct request_queue *q);
> +extern void blk_throtl_exit(struct request_queue *q);
> +#else /* CONFIG_BLK_DEV_THROTTLING */
> +static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio)
> +{
> +	return 0;
> +}
> +static inline int blk_throtl_init(struct request_queue *q) { return 0; }
> +static inline void blk_throtl_exit(struct request_queue *q) { }
> +#endif /* CONFIG_BLK_DEV_THROTTLING */
> +
> +#endif /* BLK_INTERNAL_H */
> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index bf65f06..d98d7d6 100644
> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -1198,20 +1198,6 @@ static inline uint64_t rq_io_start_time_ns(struct request *req)
>  }
>  #endif
>  
> -#ifdef CONFIG_BLK_DEV_THROTTLING
> -extern int blk_throtl_init(struct request_queue *q);
> -extern void blk_throtl_exit(struct request_queue *q);
> -extern int blk_throtl_bio(struct request_queue *q, struct bio **bio);
> -#else /* CONFIG_BLK_DEV_THROTTLING */
> -static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio)
> -{
> -	return 0;
> -}
> -
> -static inline int blk_throtl_init(struct request_queue *q) { return 0; }
> -static inline int blk_throtl_exit(struct request_queue *q) { return 0; }
> -#endif /* CONFIG_BLK_DEV_THROTTLING */
> -
>  #define MODULE_ALIAS_BLOCKDEV(major,minor) \
>  	MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
>  #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
> -- 
> 1.7.3.1
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