[patch 148/262] mm/vmscan.c: fix -Wunused-but-set-variable warning

Andrew Morton
2021-11-05T20:42:25Z

From: Kai Song <songkai01@inspur.com>
Subject: mm/vmscan.c: fix -Wunused-but-set-variable warning

We fix the following warning when building kernel with W=1:
mm/vmscan.c:1362:6: warning: variable 'err' set but not used [-Wunused-but-set-variable]

Link: https://lkml.kernel.org/r/20210924181218.21165-1-songkai01@inspur.com
Signed-off-by: Kai Song <songkai01@inspur.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

mm/vmscan.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/vmscan.c~mm-vmscanc-fix-wunused-but-set-variable-warning
+++ a/mm/vmscan.c
@@ -1337,7 +1337,6 @@ static unsigned int demote_page_list(str
{
int target_nid = next_demotion_node(pgdat->node_id);
unsigned int nr_succeeded;
- int err;

if (list_empty(demote_pages))
return 0;
@@ -1346,7 +1345,7 @@ static unsigned int demote_page_list(str
return 0;

/* Demotion ignores all cpuset and mempolicy settings */
- err = migrate_pages(demote_pages, alloc_demote_page, NULL,
+ migrate_pages(demote_pages, alloc_demote_page, NULL,
target_nid, MIGRATE_ASYNC, MR_DEMOTION,
&nr_succeeded);

_