linux-kernel - Re: [PATCH] bcache: Remove usage of the deprecated ida_simple

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Message-ID: <y2c3dt325d4xzcknmwtyd6gungco6jqucz3fsrm6lsyjtiwpp4@ozmsw6vp67jk>
Date: Sun, 14 Jan 2024 23:16:31 +0800
From: Coly Li <colyli@...e.de>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: Kent Overstreet <kent.overstreet@...ux.dev>, 
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org, linux-bcache@...r.kernel.org
Subject: Re: [PATCH] bcache: Remove usage of the deprecated ida_simple_xx()
 API

On Sun, Jan 14, 2024 at 01:30:16PM +0100, Christophe JAILLET wrote:
> ida_alloc() and ida_free() should be preferred to the deprecated
> ida_simple_get() and ida_simple_remove().
> 
> Note that the upper limit of ida_simple_get() is exclusive, but the one of
> ida_alloc_max() is inclusive. So a -1 has been added when needed.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

It looks good to me. Add this patch into my testing directory.

Thanks.

Coly Li


> ---
>  drivers/md/bcache/super.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> index dc3f50f69714..a2eecd1db126 100644
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -881,8 +881,8 @@ static void bcache_device_free(struct bcache_device *d)
>  		bcache_device_detach(d);
>  
>  	if (disk) {
> -		ida_simple_remove(&bcache_device_idx,
> -				  first_minor_to_idx(disk->first_minor));
> +		ida_free(&bcache_device_idx,
> +			 first_minor_to_idx(disk->first_minor));
>  		put_disk(disk);
>  	}
>  
> @@ -926,8 +926,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
>  	if (!d->full_dirty_stripes)
>  		goto out_free_stripe_sectors_dirty;
>  
> -	idx = ida_simple_get(&bcache_device_idx, 0,
> -				BCACHE_DEVICE_IDX_MAX, GFP_KERNEL);
> +	idx = ida_alloc_max(&bcache_device_idx, BCACHE_DEVICE_IDX_MAX - 1,
> +			    GFP_KERNEL);
>  	if (idx < 0)
>  		goto out_free_full_dirty_stripes;
>  
> @@ -980,7 +980,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
>  out_bioset_exit:
>  	bioset_exit(&d->bio_split);
>  out_ida_remove:
> -	ida_simple_remove(&bcache_device_idx, idx);
> +	ida_free(&bcache_device_idx, idx);
>  out_free_full_dirty_stripes:
>  	kvfree(d->full_dirty_stripes);
>  out_free_stripe_sectors_dirty:
> -- 
> 2.43.0
> 

-- 
Coly Li