mm/ is not W=1 clean for allnoconfig but the patch "mm/page_alloc: Split
per cpu page lists and zone stats" makes it worse with the following
warning
mm/vmstat.c: In function â??zoneinfo_show_printâ??:
mm/vmstat.c:1698:28: warning: variable â??pzstatsâ?? set but not used [-Wunused-but-set-variable]
struct per_cpu_zonestat *pzstats;
^~~~~~~
This is a fix to the mmotm patch
mm-page_alloc-split-per-cpu-page-lists-and-zone-stats.patch.
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index e3bcd317ea55..a2c3f58253be 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1695,10 +1695,9 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
seq_printf(m, "\n pagesets");
for_each_online_cpu(i) {
struct per_cpu_pages *pcp;
- struct per_cpu_zonestat *pzstats;
+ struct per_cpu_zonestat __maybe_unused *pzstats;
pcp = per_cpu_ptr(zone->per_cpu_pageset, i);
- pzstats = per_cpu_ptr(zone->per_cpu_zonestats, i);
seq_printf(m,
"\n cpu: %i"
"\n count: %i"
@@ -1709,6 +1708,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
pcp->high,
pcp->batch);
#ifdef CONFIG_SMP
+ pzstats = per_cpu_ptr(zone->per_cpu_zonestats, i);
seq_printf(m, "\n vm stats threshold: %d",
pzstats->stat_threshold);
#endif
