Re: [PATCH 3/3] mm: zpdesc: minor naming and comment corrections

[Yosry Ahmed <yosry.ahmed@linux.dev>]

On Fri, Aug 29, 2025 at 05:15:28PM +0100, Johannes Weiner wrote:
> zpdesc is the page descriptor used by the zsmalloc backend allocator,
> which in turn is used by zswap and zram. The zpool layer is gone.
> 
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> ---

Why not rename zpdesc to zsdesc or zdesc while we're at it? It's a lot
of noise but it's just this file and zsmalloc.c IIUC. Up to you.

If it's just the comment changes I would squash it into the second
patch, but not a big deal. Either way:

Acked-by: Yosry Ahmed <yosry.ahmed@linux.dev>

>  mm/zpdesc.h | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/mm/zpdesc.h b/mm/zpdesc.h
> index 25bf5ea0beb8..b8258dc78548 100644
> --- a/mm/zpdesc.h
> +++ b/mm/zpdesc.h
> @@ -1,5 +1,5 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> -/* zpdesc.h: zswap.zpool memory descriptor
> +/* zpdesc.h: zsmalloc pool memory descriptor
>   *
>   * Written by Alex Shi <alexs@kernel.org>
>   *	      Hyeonggon Yoo <42.hyeyoo@gmail.com>
> @@ -11,14 +11,14 @@
>  #include <linux/pagemap.h>
>  
>  /*
> - * struct zpdesc -	Memory descriptor for zpool memory.
> + * struct zpdesc -	Memory descriptor for zsmalloc pool memory.
>   * @flags:		Page flags, mostly unused by zsmalloc.
>   * @lru:		Indirectly used by page migration.
>   * @movable_ops:	Used by page migration.
> - * @next:		Next zpdesc in a zspage in zsmalloc zpool.
> - * @handle:		For huge zspage in zsmalloc zpool.
> + * @next:		Next zpdesc in a zspage in zsmalloc pool.
> + * @handle:		For huge zspage in zsmalloc pool.
>   * @zspage:		Points to the zspage this zpdesc is a part of.
> - * @first_obj_offset:	First object offset in zsmalloc zpool.
> + * @first_obj_offset:	First object offset in zsmalloc pool.
>   * @_refcount:		The number of references to this zpdesc.
>   *
>   * This struct overlays struct page for now. Do not modify without a good
> @@ -79,8 +79,8 @@ static_assert(sizeof(struct zpdesc) <= sizeof(struct page));
>   * zpdesc_folio - The folio allocated for a zpdesc
>   * @zp: The zpdesc.
>   *
> - * Zpdescs are descriptors for zpool memory. The zpool memory itself is
> - * allocated as folios that contain the zpool objects, and zpdesc uses specific
> + * Zpdescs are descriptors for zsmalloc memory. The memory itself is allocated
> + * as folios that contain the zsmalloc objects, and zpdesc uses specific
>   * fields in the first struct page of the folio - those fields are now accessed
>   * by struct zpdesc.
>   *
> -- 
> 2.51.0
>