diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 3d040a5fa7a3..cb17f3abdfe0 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3779,6 +3779,16 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, } } +/* + * This function doesn't do anything useful. Its only job is to provide a read + * handler for a file so that cgroup_file_mode() will add read permissions. + */ +static int mem_cgroup_dummy_seq_show(__always_unused struct seq_file *m, + __always_unused void *v) +{ + return -EINVAL; +} + #ifdef CONFIG_MEMCG_KMEM static int memcg_online_kmem(struct mem_cgroup *memcg) { @@ -5113,6 +5123,7 @@ static struct cftype mem_cgroup_legacy_files[] = { }, { .name = "pressure_level", + .seq_show = mem_cgroup_dummy_seq_show, }, #ifdef CONFIG_NUMA { |