Commit 2f5bd89b authored by Johannes Weiner's avatar Johannes Weiner Committed by Andrew Morton
Browse files

mm: zpdesc: minor naming and comment corrections 

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.

Link: https://lkml.kernel.org/r/20250829162212.208258-4-hannes@cmpxchg.org


Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Acked-by: default avatarYosry Ahmed <yosry.ahmed@linux.dev>
Cc: Chengming Zhou <zhouchengming@bytedance.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Vitaly Wool <vitaly.wool@konsulko.se>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 2ccd9fec

mm/zpdesc.h

+7 −7
Original line number Diff line number Diff line 
/* 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.

 *