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memcg: remove unused mem_cgroup_id() and mem_cgroup_from_id()

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Now that all callers have been converted to use either:
 - The private ID APIs (mem_cgroup_private_id/mem_cgroup_from_private_id)
   for internal kernel objects that outlive their cgroup
 - The public cgroup ID APIs (mem_cgroup_ino/mem_cgroup_get_from_ino)
   for external interfaces

Remove the unused wrapper functions mem_cgroup_id() and
mem_cgroup_from_id() along with their !CONFIG_MEMCG stubs.

Link: https://lkml.kernel.org/r/20251225232116.294540-8-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: SeongJae Park <sj@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Shakeel Butt 2025-12-25 15:21:15 -08:00 • committed by Andrew Morton
parent 20ccbd89af
commit 2202e3a8cb
2 changed files with 0 additions and 23 deletions
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18
include/linux/memcontrol.h
View file

@ -830,12 +830,6 @@ static inline unsigned short mem_cgroup_private_id(struct mem_cgroup *memcg)
}
struct mem_cgroup *mem_cgroup_from_private_id(unsigned short id);
static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
{
return mem_cgroup_private_id(memcg);
}
struct mem_cgroup *mem_cgroup_from_id(unsigned short id);
static inline u64 mem_cgroup_ino(struct mem_cgroup *memcg)
{
return memcg ? cgroup_id(memcg->css.cgroup) : 0;
@ -1282,18 +1276,6 @@ static inline void mem_cgroup_scan_tasks(struct mem_cgroup *memcg,
{
}
static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
{
return 0;
}
static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
{
WARN_ON_ONCE(id);
/* XXX: This should always return root_mem_cgroup */
return NULL;
}
static inline unsigned short mem_cgroup_private_id(struct mem_cgroup *memcg)
{
return 0;

5
mm/memcontrol.c
View file

@ -3615,11 +3615,6 @@ struct mem_cgroup *mem_cgroup_from_private_id(unsigned short id)
return xa_load(&mem_cgroup_private_ids, id);
}
struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
{
return mem_cgroup_from_private_id(id);
}
struct mem_cgroup *mem_cgroup_get_from_ino(u64 ino)
{
struct cgroup *cgrp;