The patch titled
Subject: memcg: cleanup root memcg checks
has been removed from the -mm tree. Its filename was
memcg-cleanup-root-memcg-checks.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: memcg: cleanup root memcg checks
Replace the implicit checking of root memcg with explicit root memcg
checking i.e. !css->parent with mem_cgroup_is_root().
Link: https://lkml.kernel.org/r/20210223205625.2792891-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/memcontrol.c~memcg-cleanup-root-memcg-checks
+++ a/mm/memcontrol.c
@@ -4123,7 +4123,7 @@ static int mem_cgroup_swappiness_write(s
if (val > 100)
return -EINVAL;
- if (css->parent)
+ if (!mem_cgroup_is_root(memcg))
memcg->swappiness = val;
else
vm_swappiness = val;
@@ -4473,7 +4473,7 @@ static int mem_cgroup_oom_control_write(
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
/* cannot set to root cgroup and only 0 and 1 are allowed */
- if (!css->parent || !((val == 0) || (val == 1)))
+ if (mem_cgroup_is_root(memcg) || !((val == 0) || (val == 1)))
return -EINVAL;
memcg->oom_kill_disable = val;
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
