linux-kernel - [PATCH v2 1/2] mm/memory_hotplug: return nothing from do_migrate

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Date:   Wed, 15 Feb 2023 23:02:59 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     SeongJae Park <sj@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] mm/memory_hotplug: return nothing from do_migrate_range()

Return value mechanism of do_migrate_range() is not very simple, while
no caller of the function checks the return value.  Make the function
return nothing to be more simple.

Suggested-by: David Hildenbrand <david@...hat.com>
Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/memory_hotplug.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index bcb0dc41c2f2..6c615ba1a5c7 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1620,8 +1620,7 @@ static int scan_movable_pages(unsigned long start, unsigned long end,
 	return 0;
 }
 
-static int
-do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
+static void do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
 {
 	unsigned long pfn;
 	struct page *page, *head;
@@ -1721,8 +1720,6 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
 			putback_movable_pages(&source);
 		}
 	}
-
-	return ret;
 }
 
 static int __init cmdline_parse_movable_node(char *p)
-- 
2.25.1