From: Kai Song <songkai01@xxxxxxxxxx> 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@xxxxxxxxxx Signed-off-by: Kai Song <songkai01@xxxxxxxxxx> Reviewed-by: Yang Shi <shy828301@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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); _
