linux-kernel - [PATCH] mm: page_alloc: make compound_page

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Date:   Sat, 17 Jun 2023 11:46:22 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH] mm: page_alloc: make compound_page_dtors static

It's only used inside page_alloc.c now. So make it static and remove the
declaration in mm.h.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 include/linux/mm.h | 1 -
 mm/page_alloc.c    | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index fdd966b11f79..441ab55e94c5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1220,7 +1220,6 @@ enum compound_dtor_id {
 #endif
 	NR_COMPOUND_DTORS,
 };
-extern compound_page_dtor * const compound_page_dtors[NR_COMPOUND_DTORS];
 
 static inline void folio_set_compound_dtor(struct folio *folio,
 		enum compound_dtor_id compound_dtor)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9eb42182eb90..3ab51fb9191c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -284,7 +284,7 @@ const char * const migratetype_names[MIGRATE_TYPES] = {
 #endif
 };
 
-compound_page_dtor * const compound_page_dtors[NR_COMPOUND_DTORS] = {
+static compound_page_dtor * const compound_page_dtors[NR_COMPOUND_DTORS] = {
 	[NULL_COMPOUND_DTOR] = NULL,
 	[COMPOUND_PAGE_DTOR] = free_compound_page,
 #ifdef CONFIG_HUGETLB_PAGE
-- 
2.27.0