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Date:   Wed, 2 Nov 2022 12:44:09 +0900
From:   Sergey Senozhatsky <senozhatsky@chromium.org>
To:     Nhat Pham <nphamcs@gmail.com>
Cc:     akpm@linux-foundation.org, hannes@cmpxchg.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, minchan@kernel.org,
        ngupta@vflare.org, senozhatsky@chromium.org, sjenning@redhat.com,
        ddstreet@ieee.org, vitaly.wool@konsulko.com
Subject: Re: [PATCH v2 5/5] zsmalloc: Implement writeback mechanism for
 zsmalloc
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References: <202210272158.7swYwd23-lkp@intel.com>
 <20221027182736.513530-1-nphamcs@gmail.com>
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On (22/10/27 11:27), Nhat Pham wrote:
[..]
> @@ -482,6 +504,7 @@ static struct zpool_driver zs_zpool_driver = {
>  	.malloc_support_movable = true,
>  	.malloc =		  zs_zpool_malloc,
>  	.free =			  zs_zpool_free,
> +	.shrink =     zs_zpool_shrink,

This should use tabs, just like the rest of fields.

>  	.map =			  zs_zpool_map,
>  	.unmap =		  zs_zpool_unmap,
>  	.total_size =		  zs_zpool_total_size,
> @@ -955,6 +978,21 @@ static int trylock_zspage(struct zspage *zspage)
>  	return 0;
>  }
> 
> +/*
> + * Free all the deferred handles whose objects are freed in zs_free.
> + */
> +static void free_handles(struct zs_pool *pool, struct zspage *zspage)
> +{
> +	unsigned long handle = (unsigned long) zspage->deferred_handles;

A nit: we don't put a white space in cases like this.
IOW (unsigned long)zspage->.... here in everywhere else in this series.