linux-kernel - [RFC v2 2/5] mm/migrate: remove unused mm argument from do_move_pages_to

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Date:   Tue, 19 Sep 2023 19:09:05 -0400
From:   Gregory Price <gourry.memverge@...il.com>
To:     linux-mm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-api@...r.kernel.org, linux-cxl@...r.kernel.org,
        luto@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
        arnd@...db.de, akpm@...ux-foundation.org, x86@...nel.org,
        Gregory Price <gregory.price@...verge.com>
Subject: [RFC v2 2/5] mm/migrate: remove unused mm argument from do_move_pages_to_node

preparatory work to re-use do_move_pages_to_node with a physical
address instead of virtual address.  This function does not actively
use the mm_struct, so it can be removed.

Signed-off-by: Gregory Price <gregory.price@...verge.com>
---
 mm/migrate.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index a0b0c5a7f8a5..dbe436163d65 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2026,8 +2026,7 @@ static int store_status(int __user *status, int start, int value, int nr)
 	return 0;
 }
 
-static int do_move_pages_to_node(struct mm_struct *mm,
-		struct list_head *pagelist, int node)
+static int do_move_pages_to_node(struct list_head *pagelist, int node)
 {
 	int err;
 	struct migration_target_control mtc = {
@@ -2123,7 +2122,7 @@ static int add_page_for_migration(struct mm_struct *mm, const void __user *p,
 	return err;
 }
 
-static int move_pages_and_store_status(struct mm_struct *mm, int node,
+static int move_pages_and_store_status(int node,
 		struct list_head *pagelist, int __user *status,
 		int start, int i, unsigned long nr_pages)
 {
@@ -2132,7 +2131,7 @@ static int move_pages_and_store_status(struct mm_struct *mm, int node,
 	if (list_empty(pagelist))
 		return 0;
 
-	err = do_move_pages_to_node(mm, pagelist, node);
+	err = do_move_pages_to_node(pagelist, node);
 	if (err) {
 		/*
 		 * Positive err means the number of failed
@@ -2200,7 +2199,7 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
 			current_node = node;
 			start = i;
 		} else if (node != current_node) {
-			err = move_pages_and_store_status(mm, current_node,
+			err = move_pages_and_store_status(current_node,
 					&pagelist, status, start, i, nr_pages);
 			if (err)
 				goto out;
@@ -2235,7 +2234,7 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
 		if (err)
 			goto out_flush;
 
-		err = move_pages_and_store_status(mm, current_node, &pagelist,
+		err = move_pages_and_store_status(current_node, &pagelist,
 				status, start, i, nr_pages);
 		if (err) {
 			/* We have accounted for page i */
@@ -2247,7 +2246,7 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
 	}
 out_flush:
 	/* Make sure we do not overwrite the existing error */
-	err1 = move_pages_and_store_status(mm, current_node, &pagelist,
+	err1 = move_pages_and_store_status(current_node, &pagelist,
 				status, start, i, nr_pages);
 	if (err >= 0)
 		err = err1;
-- 
2.39.1