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Subject[PATCH] mm/vmpressure: replace vmpressure_to_css() with vmpressure_to_memcg()
Date
We can get memcg directly form vmpr instead of vmpr->memcg->css->memcg,
so add a new func helper vmpressure_to_memcg().
And no code will use vmpressure_to_css(), so delete it.

Signed-off-by: Hui Su <suhui@zeku.com>
---
include/linux/vmpressure.h | 2 +-
mm/memcontrol.c | 4 ++--
mm/vmpressure.c | 3 +--
3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/include/linux/vmpressure.h b/include/linux/vmpressure.h
index 6d28bc433c1c..6a2f51ebbfd3 100644
--- a/include/linux/vmpressure.h
+++ b/include/linux/vmpressure.h
@@ -37,7 +37,7 @@ extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
extern void vmpressure_init(struct vmpressure *vmpr);
extern void vmpressure_cleanup(struct vmpressure *vmpr);
extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
-extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
+extern struct mem_cgroup *vmpressure_to_memcg(struct vmpressure *vmpr);
extern int vmpressure_register_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd,
const char *args);
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 64ada9e650a5..62163a9cee63 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -247,9 +247,9 @@ struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg)
return &memcg->vmpressure;
}

-struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr)
+struct mem_cgroup *vmpressure_to_memcg(struct vmpressure *vmpr)
{
- return &container_of(vmpr, struct mem_cgroup, vmpressure)->css;
+ return container_of(vmpr, struct mem_cgroup, vmpressure);
}

#ifdef CONFIG_MEMCG_KMEM
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index d69019fc3789..04e81ac6d5d8 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -74,8 +74,7 @@ static struct vmpressure *work_to_vmpressure(struct work_struct *work)

static struct vmpressure *vmpressure_parent(struct vmpressure *vmpr)
{
- struct cgroup_subsys_state *css = vmpressure_to_css(vmpr);
- struct mem_cgroup *memcg = mem_cgroup_from_css(css);
+ struct mem_cgroup *memcg = vmpressure_to_memcg(vmpr);

memcg = parent_mem_cgroup(memcg);
if (!memcg)
--
2.25.1
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