mm/memcontrol.c: remove unused private flag of memory.oom_control

There is no use for the private value, __OOM_TYPE and OOM notifier
OOM_CONTROL.  Therefore remove them to make the code clean.

Link: https://lkml.kernel.org/r/20220421122755.40899-1-lujialin4@huawei.com
Signed-off-by: Lu Jialin <lujialin4@huawei.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5cf5e32..c1f8883 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -209,7 +209,6 @@ static struct move_charge_struct {
 enum res_type {
        _MEM,
        _MEMSWAP,
-       _OOM_TYPE,
        _KMEM,
        _TCP,
 };
@@ -217,8 +216,6 @@ enum res_type {
 #define MEMFILE_PRIVATE(x, val)        ((x) << 16 | (val))
 #define MEMFILE_TYPE(val)      ((val) >> 16 & 0xffff)
 #define MEMFILE_ATTR(val)      ((val) & 0xffff)
-/* Used for OOM notifier */
-#define OOM_CONTROL            (0)
 
 /*
  * Iteration constructs for visiting all cgroups (under a tree).  If
@@ -4887,7 +4884,6 @@ static struct cftype mem_cgroup_legacy_files[] = {
                .name = "oom_control",
                .seq_show = mem_cgroup_oom_control_read,
                .write_u64 = mem_cgroup_oom_control_write,
-               .private = MEMFILE_PRIVATE(_OOM_TYPE, OOM_CONTROL),
        },
        {
                .name = "pressure_level",