The patch titled
Subject: mm/zsmalloc: reset zpdesc fields in reset_zpdesc()
has been added to the -mm mm-unstable branch. Its filename is
mm-zsmalloc-convert-reset_page-to-reset_zpdesc-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zsmalloc-convert-reset_page-to-reset_zpdesc-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Subject: mm/zsmalloc: reset zpdesc fields in reset_zpdesc()
Date: Tue, 14 Jan 2025 00:29:52 +0900
To prepare for the future removal of struct page fields (e.g. the removal
of page->index [1]), update reset_zpdesc() to reset the descriptor via
struct zpdesc instead of struct page.
As struct zpdesc overlays struct page for now, no functional change is
intended.
[1] https://lore.kernel.org/linux-mm/Z09hOy-UY9KC8WMb@xxxxxxxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/Z4Uw136VdG7vlKCL@localhost.localdomain
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Cc: Alex Shi <alexs@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/zsmalloc.c~mm-zsmalloc-convert-reset_page-to-reset_zpdesc-fix
+++ a/mm/zsmalloc.c
@@ -849,8 +849,8 @@ static void reset_zpdesc(struct zpdesc *
__ClearPageMovable(page);
ClearPagePrivate(page);
- set_page_private(page, 0);
- page->index = 0;
+ zpdesc->zspage = NULL;
+ zpdesc->next = NULL;
__ClearPageZsmalloc(page);
}
_
Patches currently in -mm which might be from 42.hyeyoo@xxxxxxxxx are
mm-zsmalloc-convert-__zs_map_object-__zs_unmap_object-to-use-zpdesc.patch
mm-zsmalloc-add-and-use-pfn-zpdesc-seeking-funcs.patch
mm-zsmalloc-convert-obj_malloc-to-use-zpdesc.patch
mm-zsmalloc-convert-obj_allocated-and-related-helpers-to-use-zpdesc.patch
mm-zsmalloc-convert-init_zspage-to-use-zpdesc.patch
mm-zsmalloc-convert-obj_to_page-and-zs_free-to-use-zpdesc.patch
mm-zsmalloc-add-two-helpers-for-zs_page_migrate-and-make-it-use-zpdesc.patch
mm-zsmalloc-convert-reset_page-to-reset_zpdesc-fix.patch
mm-zsmalloc-convert-__free_zspage-to-use-zpdesc.patch
mm-zsmalloc-convert-location_to_obj-to-take-zpdesc.patch
mm-zsmalloc-convert-migrate_zspage-to-use-zpdesc.patch
mm-zsmalloc-convert-get_zspage-to-take-zpdesc.patch
