linux-kernel - [RFC PATCH v2 17/18] swapfile: move zeromap setup out of enable_swap

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Message-ID: <20250429233848.3093350-18-nphamcs@gmail.com>
Date: Tue, 29 Apr 2025 16:38:45 -0700
From: Nhat Pham <nphamcs@...il.com>
To: linux-mm@...ck.org
Cc: akpm@...ux-foundation.org,
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Subject: [RFC PATCH v2 17/18] swapfile: move zeromap setup out of enable_swap_info

In preparation for zeromap removal in virtual swap implementation, move
zeromap setup step out of enable_swap_info to its callers, where
necessary.

Signed-off-by: Nhat Pham <nphamcs@...il.com>
---
 mm/swapfile.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 3aa3df10c3be..3ed7edc800fe 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2767,8 +2767,7 @@ static int swap_node(struct swap_info_struct *si)
 
 static void setup_swap_info(struct swap_info_struct *si, int prio,
 			    unsigned char *swap_map,
-			    struct swap_cluster_info *cluster_info,
-			    unsigned long *zeromap)
+			    struct swap_cluster_info *cluster_info)
 {
 	int i;
 
@@ -2793,7 +2792,6 @@ static void setup_swap_info(struct swap_info_struct *si, int prio,
 	}
 	si->swap_map = swap_map;
 	si->cluster_info = cluster_info;
-	si->zeromap = zeromap;
 }
 
 static void _enable_swap_info(struct swap_info_struct *si)
@@ -2825,7 +2823,8 @@ static void enable_swap_info(struct swap_info_struct *si, int prio,
 {
 	spin_lock(&swap_lock);
 	spin_lock(&si->lock);
-	setup_swap_info(si, prio, swap_map, cluster_info, zeromap);
+	setup_swap_info(si, prio, swap_map, cluster_info);
+	si->zeromap = zeromap;
 	spin_unlock(&si->lock);
 	spin_unlock(&swap_lock);
 	/*
@@ -2843,7 +2842,7 @@ static void reinsert_swap_info(struct swap_info_struct *si)
 {
 	spin_lock(&swap_lock);
 	spin_lock(&si->lock);
-	setup_swap_info(si, si->prio, si->swap_map, si->cluster_info, si->zeromap);
+	setup_swap_info(si, si->prio, si->swap_map, si->cluster_info);
 	_enable_swap_info(si);
 	spin_unlock(&si->lock);
 	spin_unlock(&swap_lock);
-- 
2.47.1