linux-kernel - [PATCH 9/9] mm: swap: replace cluster_swap_free_nr() with swap_entries_put

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Message-Id: <20250313210515.9920-10-shikemeng@huaweicloud.com>
Date: Fri, 14 Mar 2025 05:05:15 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: akpm@...ux-foundation.org
Cc: kasong@...cent.com,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 9/9] mm: swap: replace cluster_swap_free_nr() with swap_entries_put_[map/cache]()

Replace cluster_swap_free_nr() with swap_entries_put_[map/cache]() to
remove repeat code and leverage batch-remove for entries with last flag.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 mm/swapfile.c | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 343b34eb2a81..c27cf09d84a6 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1570,21 +1570,6 @@ static void swap_entries_free(struct swap_info_struct *si,
 	__swap_entries_free(si, ci, entry, nr_pages);
 }
 
-static void cluster_swap_free_nr(struct swap_info_struct *si,
-		unsigned long offset, int nr_pages,
-		unsigned char usage)
-{
-	struct swap_cluster_info *ci;
-	unsigned long end = offset + nr_pages;
-
-	ci = lock_cluster(si, offset);
-	do {
-		swap_entry_put_locked(si, ci, swp_entry(si->type, offset),
-				      usage);
-	} while (++offset < end);
-	unlock_cluster(ci);
-}
-
 /*
  * Caller has made sure that the swap device corresponding to entry
  * is still around or has not been recycled.
@@ -1601,7 +1586,7 @@ void swap_free_nr(swp_entry_t entry, int nr_pages)
 
 	while (nr_pages) {
 		nr = min_t(int, nr_pages, SWAPFILE_CLUSTER - offset % SWAPFILE_CLUSTER);
-		cluster_swap_free_nr(sis, offset, nr, 1);
+		swap_entries_put_map(sis, swp_entry(sis->type, offset), nr);
 		offset += nr;
 		nr_pages -= nr;
 	}
@@ -3632,9 +3617,7 @@ int swapcache_prepare(swp_entry_t entry, int nr)
 
 void swapcache_clear(struct swap_info_struct *si, swp_entry_t entry, int nr)
 {
-	unsigned long offset = swp_offset(entry);
-
-	cluster_swap_free_nr(si, offset, nr, SWAP_HAS_CACHE);
+	swap_entries_put_cache(si, entry, nr);
 }
 
 struct swap_info_struct *swp_swap_info(swp_entry_t entry)
-- 
2.30.0