From 32cf666eab720b597650d9dea6ff07e99cd36b3d Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@kernel.org>
Date: Thu, 16 Feb 2023 17:07:03 +0000
Subject: [PATCH] mm/memory_hotplug: cleanup return value handing in
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, and cleanup related unnecessary code.
Link: https://lkml.kernel.org/r/20230216170703.64574-1-sj@kernel.org
Suggested-by: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/memory_hotplug.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 5f73fd894b897..db3b270254f1e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1620,12 +1620,10 @@ 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;
- int ret = 0;
LIST_HEAD(source);
static DEFINE_RATELIMIT_STATE(migrate_rs, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
@@ -1679,7 +1677,6 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
page_is_file_lru(page));
} else {
- ret = -EBUSY;
if (__ratelimit(&migrate_rs)) {
pr_warn("failed to isolate pfn %lx\n", pfn);
dump_page(page, "isolation failed");
@@ -1693,6 +1690,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
.nmask = &nmask,
.gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL,
};
+ int ret;
/*
* We have checked that migration range is on a single zone so
@@ -1721,8 +1719,6 @@ 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)
--
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