From 4e915b16ded278e57519e54793ab84b4a094fa83 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 13 Jul 2026 11:33:41 +0200
Subject: [PATCH] mm/swap: remove count_swpout_vm_event

There is only one caller left, so merge it into that.

Link: https://lore.kernel.org/20260713093350.2154226-5-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Baoquan He <baoquan.he@linux.dev>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/page_io.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/mm/page_io.c b/mm/page_io.c
index 0195c25a77eb..56f21e49572e 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -254,19 +254,6 @@ int swap_writeout(struct swap_io_ctx *ctx, struct folio *folio)
 	return ret;
 }
 
-static inline void count_swpout_vm_event(struct folio *folio)
-{
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-	if (unlikely(folio_test_pmd_mappable(folio))) {
-		count_memcg_folio_events(folio, THP_SWPOUT, 1);
-		count_vm_event(THP_SWPOUT);
-	}
-#endif
-	count_mthp_stat(folio_order(folio), MTHP_STAT_SWPOUT);
-	count_memcg_folio_events(folio, PSWPOUT, folio_nr_pages(folio));
-	count_vm_events(PSWPOUT, folio_nr_pages(folio));
-}
-
 #if defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP)
 static struct cgroup_subsys_state *folio_memcg_blkg_css(struct folio *folio)
 {
@@ -397,7 +384,16 @@ void __swap_writepage(struct swap_io_ctx *ctx, struct folio *folio)
 {
 	VM_BUG_ON_FOLIO(!folio_test_swapcache(folio), folio);
 
-	count_swpout_vm_event(folio);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+	if (unlikely(folio_test_pmd_mappable(folio))) {
+		count_memcg_folio_events(folio, THP_SWPOUT, 1);
+		count_vm_event(THP_SWPOUT);
+	}
+#endif
+	count_mthp_stat(folio_order(folio), MTHP_STAT_SWPOUT);
+	count_memcg_folio_events(folio, PSWPOUT, folio_nr_pages(folio));
+	count_vm_events(PSWPOUT, folio_nr_pages(folio));
+
 	folio_start_writeback(folio);
 	folio_unlock(folio);
 	swap_add_folio(ctx, folio, WRITE);