mm: memcg: guard cgroup v1-specific code in mem_cgroup_print_oom_meminfo()

Put cgroup v1-specific code in mem_cgroup_print_oom_meminfo() under
CONFIG_MEMCG_V1.

Link: https://lkml.kernel.org/r/20240628210317.272856-4-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8954e32..c6a5b0c 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1535,6 +1535,7 @@ void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)
                pr_info("swap: usage %llukB, limit %llukB, failcnt %lu\n",
                        K((u64)page_counter_read(&memcg->swap)),
                        K((u64)READ_ONCE(memcg->swap.max)), memcg->swap.failcnt);
+#ifdef CONFIG_MEMCG_V1
        else {
                pr_info("memory+swap: usage %llukB, limit %llukB, failcnt %lu\n",
                        K((u64)page_counter_read(&memcg->memsw)),
@@ -1543,6 +1544,7 @@ void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)
                        K((u64)page_counter_read(&memcg->kmem)),
                        K((u64)memcg->kmem.max), memcg->kmem.failcnt);
        }
+#endif
 
        pr_info("Memory cgroup stats for ");
        pr_cont_cgroup_path(memcg->css.cgroup);