arm64: mte: make mte_save_tags() and mte_restore_tags() static

mte_save_tags() and mte_restore_tags() are only used by
arch_prepare_to_swap() and arch_swap_restore() in mteswap.c.  Make them
static and remove their declarations from mte.h.

No functional change.

Link: https://lore.kernel.org/20260908-folio_swap_entry-v2-6-ee6d01dfa5e1@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Harry Yoo <harry@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Kiryl Shutsemau <kas@kernel.org>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>

2 files changed, 2 insertions, 4 deletions

diff --git a/arch/arm64/include/asm/mte.h b/arch/arm64/include/asm/mte.h
index 7f7b97e09996..83f3b05fc784 100644
--- a/arch/arm64/include/asm/mte.h
+++ b/arch/arm64/include/asm/mte.h
@@ -23,9 +23,7 @@ unsigned long mte_copy_tags_from_user(void *to, const void __user *from,
 				      unsigned long n);
 unsigned long mte_copy_tags_to_user(void __user *to, void *from,
 				    unsigned long n);
-int mte_save_tags(struct page *page);
 void mte_save_page_tags(const void *page_addr, void *tag_storage);
-void mte_restore_tags(swp_entry_t entry, struct page *page);
 void mte_restore_page_tags(void *page_addr, const void *tag_storage);
 void mte_invalidate_tags(int type, pgoff_t offset);
 void mte_invalidate_tags_area(int type);
diff --git a/arch/arm64/mm/mteswap.c b/arch/arm64/mm/mteswap.c
index 63e8d72f202a..3c54afc8b758 100644
--- a/arch/arm64/mm/mteswap.c
+++ b/arch/arm64/mm/mteswap.c
@@ -20,7 +20,7 @@ void mte_free_tag_storage(char *storage)
 	kfree(storage);
 }
 
-int mte_save_tags(struct page *page)
+static int mte_save_tags(struct page *page)
 {
 	void *tag_storage, *ret;
 
@@ -47,7 +47,7 @@ int mte_save_tags(struct page *page)
 	return 0;
 }
 
-void mte_restore_tags(swp_entry_t entry, struct page *page)
+static void mte_restore_tags(swp_entry_t entry, struct page *page)
 {
 	void *tags = xa_load(&mte_pages, entry.val);