diff options
| author | Michal Hocko <mhocko@suse.cz> | 2015-09-08 15:01:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | fabc3fdde00b54825ba23230aedbf88a735b4e49 (patch) | |
| tree | 9c6360e09f1ec15e5f85ec0cf6f5f79b7824a152 | |
| parent | 33398cf2f360c5ce24c8a22436d52a06ad4e5eb5 (diff) | |
| download | x86-pkeys-fabc3fdde00b54825ba23230aedbf88a735b4e49.tar.gz | |
memcg: get rid of mem_cgroup_root_css for !CONFIG_MEMCG
The only user is cgwb_bdi_init and that one depends on
CONFIG_CGROUP_WRITEBACK which in turn depends on CONFIG_MEMCG so it
doesn't make much sense to definte an empty stub for !CONFIG_MEMCG.
Moreover ERR_PTR(-EINVAL) is ugly and would lead to runtime crashes if
used in unguarded code paths. Better fail during compilation.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/memcontrol.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index ab2f6880e27b2d..91bbe4ba623368 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -498,8 +498,6 @@ void mem_cgroup_split_huge_fixup(struct page *head); #else /* CONFIG_MEMCG */ struct mem_cgroup; -#define mem_cgroup_root_css ((struct cgroup_subsys_state *)ERR_PTR(-EINVAL)) - static inline void mem_cgroup_events(struct mem_cgroup *memcg, enum mem_cgroup_events_index idx, unsigned int nr) |