linux-kernel - [RFC PATCH v2 20/21] mm/zsmalloc: remove now unused helper functions

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Date:   Thu, 13 Jul 2023 13:20:35 +0900
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Mike Rapoport <rppt@...nel.org>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>
Subject: [RFC PATCH v2 20/21] mm/zsmalloc: remove now unused helper functions

All users of is_first_page(), get_first_page(), get_next_page()
are now converted to use new helper functions that takes zsdesc.

Remove now unused helper functions.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@...il.com>
---
 mm/zsmalloc.c | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 5f07e3d92a99..3933c023c3c9 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -581,12 +581,7 @@ static DEFINE_PER_CPU(struct mapping_area, zs_map_area) = {
 	.lock	= INIT_LOCAL_LOCK(lock),
 };
 
-static __maybe_unused int is_first_page(struct page *page)
-{
-	return PagePrivate(page);
-}
-
-static __maybe_unused int is_first_zsdesc(struct zsdesc *zsdesc)
+static int is_first_zsdesc(struct zsdesc *zsdesc)
 {
 	return PagePrivate(zsdesc_page(zsdesc));
 }
@@ -603,15 +598,7 @@ static inline void mod_zspage_inuse(struct zspage *zspage, int val)
 	zspage->inuse += val;
 }
 
-static __maybe_unused inline struct page *get_first_page(struct zspage *zspage)
-{
-	struct page *first_page = zsdesc_page(zspage->first_zsdesc);
-
-	VM_BUG_ON_PAGE(!is_first_page(first_page), first_page);
-	return first_page;
-}
-
-static __maybe_unused struct zsdesc *get_first_zsdesc(struct zspage *zspage)
+static struct zsdesc *get_first_zsdesc(struct zspage *zspage)
 {
 	struct zsdesc *first_zsdesc = zspage->first_zsdesc;
 
@@ -907,17 +894,7 @@ static struct zspage *get_zspage(struct zsdesc *zsdesc)
 	return zspage;
 }
 
-static __maybe_unused struct page *get_next_page(struct page *page)
-{
-	struct zspage *zspage = get_zspage(page_zsdesc(page));
-
-	if (unlikely(ZsHugePage(zspage)))
-		return NULL;
-
-	return (struct page *)page->index;
-}
-
-static __maybe_unused struct zsdesc *get_next_zsdesc(struct zsdesc *zsdesc)
+static struct zsdesc *get_next_zsdesc(struct zsdesc *zsdesc)
 {
 	struct zspage *zspage = get_zspage(zsdesc);
 
-- 
2.41.0