memcg: make PGPGIN and PGPGOUT v1 only

Currently PGPGIN and PGPGOUT are used and exposed in the memcg v1 only
code.  So, let's put them under CONFIG_MEMCG_V1.

Link: https://lkml.kernel.org/r/20240815050453.1298138-8-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: T.J. Mercier <tjmercier@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6b4b51caf71bfb7316b27ae2ad2a72e64e2f83f9..1decbd38216e5f95d8b950b99d82cbf3062022f5 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -408,8 +408,10 @@ unsigned long lruvec_page_state_local(struct lruvec *lruvec,
 
 /* Subset of vm_event_item to report for memcg event stats */
 static const unsigned int memcg_vm_event_stat[] = {
+#ifdef CONFIG_MEMCG_V1
        PGPGIN,
        PGPGOUT,
+#endif
        PGSCAN_KSWAPD,
        PGSCAN_DIRECT,
        PGSCAN_KHUGEPAGED,
@@ -1429,10 +1431,11 @@ static void memcg_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)
                       memcg_events(memcg, PGSTEAL_KHUGEPAGED));
 
        for (i = 0; i < ARRAY_SIZE(memcg_vm_event_stat); i++) {
+#ifdef CONFIG_MEMCG_V1
                if (memcg_vm_event_stat[i] == PGPGIN ||
                    memcg_vm_event_stat[i] == PGPGOUT)
                        continue;
-
+#endif
                seq_buf_printf(s, "%s %lu\n",
                               vm_event_name(memcg_vm_event_stat[i]),
                               memcg_events(memcg, memcg_vm_event_stat[i]));