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mm/vmpressure: replace vmpressure_to_css() with vmpressure_to_memcg() 

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.

Link: https://lkml.kernel.org/r/20210630112146.455103-1-suhui@zeku.com
Signed-off-by: Hui Su <suhui@zeku.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Chris Down <chris@chrisdown.name>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hui Su 2021-09-02 14:59:36 -07:00 committed by Linus Torvalds
parent 20b51af15e
commit 9647875be5
3 changed files with 4 additions and 5 deletions
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2
include/linux/vmpressure.h
View File

@ -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);

4
mm/memcontrol.c
View File

@ -256,9 +256,9 @@ 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

3
mm/vmpressure.c
View File

@ -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)