mm: memcg: reset oom_group in css_reset

memory.oom.group defaults to disabled, but css_reset did not clear
memcg->oom_group when a disabled memory css is kept alive by another
controller dependency.

Reset it with the other memory controller policies so a hidden memcg
cannot keep applying stale group OOM kill policy.

Link: https://lore.kernel.org/20260703063826.306878-2-jiayuan.chen@linux.dev
Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions