+ mm-zsmalloc-convert-setzspagemovable-and-remove-unused-funcs.patch added to mm-unstable branch

+ mm-zsmalloc-convert-setzspagemovable-and-remove-unused-funcs.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/zsmalloc: convert SetZsPageMovable and remove unused funcs
has been added to the -mm mm-unstable branch.  Its filename is
     mm-zsmalloc-convert-setzspagemovable-and-remove-unused-funcs.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-setzspagemovable-and-remove-unused-funcs.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: Alex Shi <alexs@kernel.org>
Subject: mm/zsmalloc: convert SetZsPageMovable and remove unused funcs
Date: Tue, 17 Dec 2024 00:04:47 +0900

Convert SetZsPageMovable() to use zpdesc, and then remove unused funcs:
get_next_page()/get_first_page()/is_first_page().

Link: https://lkml.kernel.org/r/20241216150450.1228021-17-42.hyeyoo@gmail.com
Originally-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Acked-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Tested-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/zsmalloc.c |   33 +++++----------------------------
 1 file changed, 5 insertions(+), 28 deletions(-)

--- a/mm/zsmalloc.c~mm-zsmalloc-convert-setzspagemovable-and-remove-unused-funcs
+++ a/mm/zsmalloc.c
@@ -452,11 +452,6 @@ static DEFINE_PER_CPU(struct mapping_are
 	.lock	= INIT_LOCAL_LOCK(lock),
 };
 
-static __maybe_unused int is_first_page(struct page *page)
-{
-	return PagePrivate(page);
-}
-
 static inline bool is_first_zpdesc(struct zpdesc *zpdesc)
 {
 	return PagePrivate(zpdesc_page(zpdesc));
@@ -473,14 +468,6 @@ static inline void mod_zspage_inuse(stru
 	zspage->inuse += val;
 }
 
-static inline struct page *get_first_page(struct zspage *zspage)
-{
-	struct page *first_page = zpdesc_page(zspage->first_zpdesc);
-
-	VM_BUG_ON_PAGE(!is_first_page(first_page), first_page);
-	return first_page;
-}
-
 static struct zpdesc *get_first_zpdesc(struct zspage *zspage)
 {
 	struct zpdesc *first_zpdesc = zspage->first_zpdesc;
@@ -765,16 +752,6 @@ static struct zspage *get_zspage(struct
 	return zspage;
 }
 
-static struct page *get_next_page(struct page *page)
-{
-	struct zspage *zspage = get_zspage(page_zpdesc(page));
-
-	if (unlikely(ZsHugePage(zspage)))
-		return NULL;
-
-	return (struct page *)page->index;
-}
-
 static struct zpdesc *get_next_zpdesc(struct zpdesc *zpdesc)
 {
 	struct zspage *zspage = get_zspage(zpdesc);
@@ -1936,13 +1913,13 @@ static void init_deferred_free(struct zs
 
 static void SetZsPageMovable(struct zs_pool *pool, struct zspage *zspage)
 {
-	struct page *page = get_first_page(zspage);
+	struct zpdesc *zpdesc = get_first_zpdesc(zspage);
 
 	do {
-		WARN_ON(!trylock_page(page));
-		__SetPageMovable(page, &zsmalloc_mops);
-		unlock_page(page);
-	} while ((page = get_next_page(page)) != NULL);
+		WARN_ON(!zpdesc_trylock(zpdesc));
+		__zpdesc_set_movable(zpdesc, &zsmalloc_mops);
+		zpdesc_unlock(zpdesc);
+	} while ((zpdesc = get_next_zpdesc(zpdesc)) != NULL);
 }
 #else
 static inline void zs_flush_migration(struct zs_pool *pool) { }
_

Patches currently in -mm which might be from alexs@kernel.org are

mm-zsmalloc-add-zpdesc-memory-descriptor-for-zswapzpool.patch
mm-zsmalloc-use-zpdesc-in-trylock_zspage-lock_zspage.patch
mm-zsmalloc-convert-create_page_chain-and-its-users-to-use-zpdesc.patch
mm-zsmalloc-convert-reset_page-to-reset_zpdesc.patch
mm-zsmalloc-convert-setzspagemovable-and-remove-unused-funcs.patch
mm-zsmalloc-convert-get-set_first_obj_offset-to-take-zpdesc.patch
mm-zsmalloc-introduce-__zpdesc_clear-set_zsmalloc.patch